WO2003027036A1 - Grey glass composition including erbium, holmium, and/or yttrium - Google Patents

Grey glass composition including erbium, holmium, and/or yttrium Download PDF

Info

Publication number
WO2003027036A1
WO2003027036A1 PCT/US2002/028707 US0228707W WO03027036A1 WO 2003027036 A1 WO2003027036 A1 WO 2003027036A1 US 0228707 W US0228707 W US 0228707W WO 03027036 A1 WO03027036 A1 WO 03027036A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
oxide
holmium
erbium
ingredient
Prior art date
Application number
PCT/US2002/028707
Other languages
French (fr)
Inventor
Ksenia A. Landa
Leonid Landa
Anthony V. Longobardo
Scott V. Thomsen
David R. Hall, Jr.
Original Assignee
Guardian Industries Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guardian Industries Corp. filed Critical Guardian Industries Corp.
Publication of WO2003027036A1 publication Critical patent/WO2003027036A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/02—Compositions for glass with special properties for coloured glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
    • C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass

Definitions

  • This invention relates to glass compositions and methods of making the same. More particularly, this invention relates to glass compositions including at least erbium (Er) and holmium (Ho), which have low light transmittance in the UV (ultraviolet) and IR (infrared) ranges and high light transmittance in the visible range. Such glass compositions are useful, for example, in windows and windshields in the automotive industry and also in architectural applications. Glasses herein may be grey, or otherwise colored.
  • a glass window or other glass article is said to have the desirable color "grey” when it has a dominant wavelength of from 435 nm to 570 nm (this dominant wavelength range defines the color "grey” herein).
  • grey glass often has an excitation purity of less than about 4.5%.
  • Glass thickness ranges of from about 1-6 mm, more preferably from about 3-4 mm, are typically used when measuring the aforesaid characteristics. These thickness ranges are generally recognized as conventional thicknesses for glass sheets made by the float glass process, as well as recognized thickness ranges in the automotive industry.
  • UV at least about 70% UV: no greater than about 52%, more preferably no greater than 50%
  • IR no greater than about 46%, more preferably no greater than 42%
  • Classically formulated grey glasses often include low levels of iron (i.e., less than 0.2% total iron) along with cobalt and nickel oxides. Unfortunately, while this type of glass may achieve satisfactory coloration in certain instances, it typically suffers from undesirable solar characteristics. Certain nickel-free grey glasses combine selenium (Se) and cobalt (Co) oxide with iron oxide, but also suffer from poor solar performance characteristics.
  • Certain known green solar control float glasses are formulated so as to achieve desirable solar characteristics due in large part to their use of large quantities of total iron (e.g., 0.60 to 0.84% total iron).
  • total iron e.g. 0.60 to 0.84% total iron.
  • the green coloration of such glasses does not always harmonize well with certain exterior automotive paints and sometimes affects vehicle interiors when viewed through the glass.
  • a new glass composition which overcomes the above problems while achieving one or more of desired grey color and desired solar management property(ies) of the particular application in which it is to be used.
  • An object of this invention is to provide a grey glass (i.e., having a dominant wavelength of from 435 nm to 570 nm) including a colorant portion which may include at least from 0.20 to 2.50 %, by weight, erbium oxide (e.g., Er 2 0 3 ), from about 0.10 to 0.90%, by weight total iron (expressed as Fe 2 0 3 ); and from about 0.05 to 1.60%, by weight, holmium oxide (e.g., Ho 2 0 3 ); and from about 0.10 to 2.0%, by weight, yttrium oxide (e.g., Y 2 0 3 ).
  • erbium oxide e.g., Er 2 0 3
  • holmium oxide e.g., Ho 2 0 3
  • yttrium oxide e.g., Y 2 0 3
  • the combination of erbium oxide, iron oxide, holmium oxide, and yttrium oxide provides for desirable color and/
  • a glass comprising:
  • yttrium oxide 0.10 - 2.0% total iron: 0.10 - 2.0 % erbium oxide: 0.20 - 2.50 % holmium oxide: 0.05 - 1.60 %.
  • a grey glass comprising: a base glass portion comprising:
  • titanium oxide 0.0 - 2.0 %
  • holmium oxide 0.05 - 1.60 %
  • the grey glass has a dominant wavelength in the range of from 435 nm to 570 nm.
  • the glass may be grey in color and have an excitation
  • the glass or glass composition is substantially free of cerium and/or nickel.
  • Glasses according to different embodiments of this invention may be used, for example, in the automotive industry (e.g., windshields, backlites, side windows, etc.), in architectural applications, and in other suitable applications. Such glasses may be grey, or otherwise colored in different embodiments of this invention.
  • Certain glasses according to this invention utilize soda-lime-silica flat glass as their base composition/glass, to which is added certain ingredients making up a unique colorant portion.
  • An exemplary soda-lime-silica base glass according to certain embodiments of this invention, on a weight percentage basis, includes the following basic ingredients:
  • the Yttrium oxide (Y 2 0 3 ) is added to the base glass along with the colorants.
  • Y 2 0 3 is listed and considered herein as part of the base glass as opposed to the colorant portion.
  • the glass composition (before and after the melt) includes from about 0.10 to 2.0% Y 2 0 3 , more preferably from about 0.10 to 1.0% Y 2 0 3 , and even more preferably from about 0.10 to 0.6% Y 2 0 3 .
  • glass herein may be made from batch raw materials silica sand, soda ash (or NaOH as a soda source), dolomite, limestone, with the use of salt cake (S0 3 ) and/or Epsom salts (e.g., about a 1:1 combination of both) as refining agents.
  • Reducing agent(s) such as Si (metallic), Si, silicon monoxide, SiO, sucrose, and/or carbon may also be used.
  • soda-lime-silica base glasses herein include by weight from about 10-15% Na 2 0 and from about 6-12% CaO. While a soda-lime-silica base glass set forth above is preferred in certain embodiments of this invention, this invention is not so limited. Thus, other base glasses (e.g., borosilicate glass) may instead be employed in alternative embodiments.
  • base glasses e.g., borosilicate glass
  • the instant invention adds a colorant portion which may cause the resulting glass to be grey in color (e.g., dominant wavelength of from 435nm to 570 nm) and/or achieve desirable solar management properties (e.g., low UV and IR transmission coupled with high visible transmission).
  • the resulting glass is grey in color and has a dominant wavelength of from 480 nm - 560 nm (nanometers).
  • the resulting glass preferably has an excitation purity (Pe) no greater than about 4.5%, and most preferably from 0.2% to 4.5%.
  • an exemplary colorant portion that is added to the base glass is substantially free of cerium and nickel (i.e., no more than 0.0030% Ce, CeO, and/or Ce0 2 , and no more than 0.0010% Ni and/or NiO), and is characterized in final glasses as set forth in Table 2 below (in terms of weight percentage of the total glass composition):
  • total iron (expressed as Fe 2 0 3 ): 0.10 - 0.90 % 0.20 - 0.70 %
  • erbium oxide e.g., Er 2 0 3
  • cobalt oxide e.g., Co 3 0 4
  • titanium oxide e.g., Ti0 2
  • boron oxide e.g., B 2 0 3 : 0.0 - 2.0 % 0.0 - 1.0 %
  • holmium oxide e.g., Ho 2 0 3 : 0.05 - 1.60 % 0.10 - 0.60 %
  • thulium oxide e.g., Tm 2 0 3 : 0.0 - 2.0 % 0.0 - 1.0 %
  • ytterbium oxide e.g., Yb 2 0 3 : 0.0 - 3.0 % 0.0 - 2.0 %
  • lutetium oxide e.g., Lu 2 0 3
  • Lu 2 0 3 0.0 - 1.0 % 0.0 - 0.80 %
  • the total amount of iron present in the glass and in the colorant portion thereof is expressed herein in terms of Fe 2 0 3 in accordance with standard practice. This, however, does not imply that all iron is actually in the from of Fe 2 0 3 .
  • the amount of iron in the ferrous state is reported herein as FeO, even though all ferrous state iron in the glass may not be in the form of FeO.
  • the proportion of the total iron in the ferrous state i.e., FeO
  • FeO is used to determine the redox state of the glass, and is expressed as the ratio FeO/ Fe 2 0 3 , which is the weight percentage (%) of iron in the ferrous state (expressed as FeO) divided by the weight percentage (%) of total iron (expressed as Fe 2 0 3 ).
  • Fe 2 0 3 herein means total iron and FeO means iron in the ferrous state.
  • the colorant portion of the glass composition herein is characterized by a redox value (i.e., FeO/ Fe 2 0 3 ) of from 0.10 to 0.25, more preferably from 0.12 to 0.20.
  • glass according to this invention is often made via the known float process in which a tin bath is utilized. It will thus be appreciated by those skilled in the art that as a result of forming the glass on molten tin in certain exemplary embodiments, small amounts of tin or tin oxide may migrate into surface areas of the glass on the side that was in contact with the tin bath during manufacture (i.e., typically, float glass may have a tin oxide concentration of 0.05% or more (wt.) in the first few microns below the surface that was in contact with the tin bath). Glasses of this invention, as stated above, may in certain non-limiting embodiments achieve a true grey or neutral grey color.
  • glasses herein include one or more of the following color/solar characteristics when measured at a nominal thickness of from about 1mm - 6mm (and preferably for most uses, at about 3mm - 4mm):
  • certain example glass articles of this invention When used in the automotive market for windows and/or windshields that must conform to certain minimal visible light transmission properties, certain example glass articles of this invention (e.g., at 3 mm thicknesses for purposes of reference) preferably have an Lta of at least 65%, more preferably of at least about 70% and, in certain embodiments of least about 72%, and in still further instances at least about 75%; and/or an IR transmission percentage (%) of no greater than 46%. Additionally, in certain exemplary embodiments, glasses herein have a UV transmission percentage (%) of no greater than about 52%, more preferably no greater than about 50%, and sometimes no greater than 46%. These optical characteristics relate to example embodiments only, and are not limiting upon the invention as a whole unless specifically claimed herein.
  • the glasses of this invention achieve the above unique characteristics (i.e., desired color in combination with desired solar management properties, e.g., Lta, UV, IR) in base glasses (e.g., silicate glasses such as soda-lime-silica, or borosilicate glasses) through the use of the unique colorant portions discussed herein.
  • base glasses e.g., silicate glasses such as soda-lime-silica, or borosilicate glasses
  • Erbium acts as a pink colorant
  • holmium as a pale yellow colorant
  • FeO aspect of the total iron acts as a blue colorant.
  • selenium and cobalt may be utilized in the colorant portion for coloration purposes to achieve the desired grey color.
  • Se may be introduced into the glass batch in amounts of, for example, from 5-20 ppm.
  • compositions of this invention may use various sources of Se, such as sodium and/or calcium selenites, iron and or cobalt selenides, and/or metallic Se powder.
  • Se often combines with iron as iron selenide (FeSe) in glass to produce brown color, and does so in certain embodiments of this invention, selenium is referred to in the colorant portion herein as "Se" which is meant to include, for example, its state as Se as well as other states in glass such as FeSe. While the use of Se is preferred in the colorant portion as discussed above, it is noted that in some embodiments Se need not be present.
  • this blue colorant may be added to the glass batch in amounts of, for example, 10-30 ppm. Moreover, it is believed that much of the cobalt in the glass is in the oxide state of Co 3 0 4 .
  • other oxide states of CoO are also possible in glasses according to this invention.
  • the terms cobalt oxide, CoO and Co 3 0 4 as used herein include not only cobalt in this/these particular oxide state(s), but also include(s) cobalt which may be present in other oxide state(s).
  • Holmium oxide acts as a pale yellow colorant. Moreover, it is believed that much of the holmium in the glass is in the oxide state of Ho 2 0 3 .
  • holmium oxide, HoO and Ho 2 0 3 as used herein include not only holmium in this/these particular oxide state(s), but also include(s) holmium which may be present in other oxide state(s).
  • erbium oxide, ErO and Er 2 0 3 as used herein include not only Er in this/these particular oxide state(s), but also include(s) Er which may be present in other oxide state(s). The same is true of other oxides herein, including but not limited to yttrium oxide.
  • Colorant elements Ho, Er, Tm, Yb and Lu are all lanthanides or rare earth elements, as is Yttrium (Y).
  • Y Yttrium
  • a plurality of different lanthanides (or rare earth elements) are used in the glass composition together with iron in order to achieve the desired glass color. This is advantageous in that lanthanides are often grouped together when mined, and thus the ability to use multiple lanthanides together as a colorant portion is more cost efficient than previous methods of adding colorants such as Er.
  • a three element concentrate including oxides of Er, Ho and Y may be added to the base glass in order to color the same as will be explained in the examples below (regardless of when Y is added to the glass composition, whether or not along with Er and Ho, it is considered part of the base glass because it is essentially colorless and does not act as a colorant herein).
  • a different plurality of rare earth oxides may be added to the base glass.
  • three or more lanthanides combine with at least iron in order to achieve the desired glass color and/or solar characteristics.
  • a three element Er inclusive concentrate available from Tianjio International Trading Co.
  • the composition includes at least three times as much Er 2 0 3 as Y 2 0 3 .
  • two, three or four different lanthanides may be used together with iron to achieve the desired glass color and/or solar characteristics.
  • glass compositions herein have more erbium oxide (Er 2 0 3 ) than any of holmium oxide (Ho 2 0 3 ), yttrium oxide (Y 2 0 3 ), ytterbium oxide, or lutetium oxide taken individually.
  • glass compositions herein have at least twice as much erbium oxide (Er 2 0 3 ) as holmium oxide (Ho 2 0 3 ).
  • glass compositions herein have at least twice as much erbium oxide (Er 2 0 3 ) as yttrium oxide
  • the glasses of this invention may be made from batch ingredients using well known glass melting and refining techniques once given the above final glass analysis.
  • a conventional batch technique for melting the following base glass batch was used for the Examples herein (note: the below-listed ingredients in the batch will add up to 100% by weight once oxides thereof are accounted for; thus, they need not add up to one hundred as raw materials):
  • Table 4 Base Glass for Examples 1-6
  • the colorant portions for Examples 1-6 herein of different embodiments of this invention were as follows (wt. % of total glass) in amounts added to the base batch. It is noted that Y 2 0 3 is not a colorant, and is listed in Table 5 below along with the colorant for purposes of simplicity only because it was added to the glass batch therewith as part of the aforesaid three element concentrate.
  • Example 6 is provided for comparison purposes, to illustrate the undesirable color associated with glass composition if the Er and/or Ho is not present in the composition (see extreme a* value below).
  • the base glass batch material together with the colorant portion was melted. Thereafter, it was annealed at about 620 degrees C for half an hour, and then allowed to cool down to room temperature.
  • the example glasses i.e., samples
  • the example glasses were then polished to the desired thickness and spectral measurements above were taken to determine the light transmittance in the wavelength range from 250 to 2,000 nm. The results are set forth in the tables above.
  • each of Examples 1-5 was grey in color and had a dominant wavelength of from 480 nm - 560 nm (nanometers), and an excitation purity (Pe) from 0.2% to 4.5%.
  • luminous transmittance (2 degree observer) is understood in the art, and is used herein in accordance with its known meaning, e.g., see U.S. Patent No. 5,308,805 (e.g., see ASTM E308). This term is also known as 111.
  • a visible transmittance (380 - 780 nanometers inclusive), and its measurements are made in accordance with CIE Publication 15.2 (1986)) and ASTM E308.
  • the terms, and characteristics, of ultraviolet light transmittance (%UV) , infrared energy transmittance (%IR), dominant wavelength (DW) and excitation purity (i.e. % "purity", or Pe) are also well understood terms in the art, as are their measurement techniques.
  • UV transmittance %UV
  • Parry Moon Air Mass 2 (300 - 400 nm inclusive, integrated using Simpson's Rule at 10 nm intervals).
  • Dominant wavelength DW
  • dominant wavelength includes both the actual measured wavelength and, where applicable, its calculated complement.
  • Excitation purity Pe or % "purity" is measured conventionally in accordance with CIE Publication 15.2 (1986) and ASTM: E 308-90.
  • glass compositions herein may be manufactured via single batch melting techniques, or alternatively via multiple pre-batch mixing techniques utilizing separate pre-batch mixes that are ultimately mixed together to make up a final overall batch mixture.
  • one of the prebatch mixes could be made up of the iron- containing ingredient (e.g. rouge) along with SiO (silicon monoxide) and optionally, metallic Si (i.e. the reducing agents), and preferably some of the sand.
  • the remaining batch ingredients can then be made up by admixing them in another separate prebatch mix or into two or more prebatch mixes before admixing them with the iron and reducing agent-containing first prebatch mix.

Abstract

A glass composition including from 0.10 to 2.0% yttrium oxide (e.g., Y2O3) and employing in its colorant portion iron (total iron expressed as Fe2O3), erbium (e.g., Er2O3), and/or holmium (e.g., Ho2O3). In certain embodiments, the glass may be grey in color.

Description

TITLE OF THE INVENTION
GREY GLASS COMPOSITION INCLUDING ERBIUM, HOLMTUM, AND/OR
YTTRIUM
This invention relates to glass compositions and methods of making the same. More particularly, this invention relates to glass compositions including at least erbium (Er) and holmium (Ho), which have low light transmittance in the UV (ultraviolet) and IR (infrared) ranges and high light transmittance in the visible range. Such glass compositions are useful, for example, in windows and windshields in the automotive industry and also in architectural applications. Glasses herein may be grey, or otherwise colored.
BACKGROUND OF THE INVENTION
The automotive industry, for a number of years, has desired glass having grey color (sometimes called "neutral grey") for automotive window applications. At the same time, it is also desirable for transmission in the UV and/or IR ranges of the light spectrum to be minimized. Moreover, certain Governmental regulations in the automotive industry have been known to require that visible light transmittance be at least 70% in certain vehicular windows when provided by the original equipment manufacturer of the vehicle (e.g. GM, Ford, Chrysler etc.) in the U.S.A. Accordingly, there exists a need in the automotive industry for a glass which achieves these properties (a similar need may also exist in other industries such as the architectural glass industry).
A glass window or other glass article is said to have the desirable color "grey" when it has a dominant wavelength of from 435 nm to 570 nm (this dominant wavelength range defines the color "grey" herein). Moreover, grey glass often has an excitation purity of less than about 4.5%. In certain embodiments, it may be preferable to have a dominant wavelength of from 470 nm to 570 nm, or even from 480-560 nm, with purity of from about 0.2 to 4.5%. While glass having "grey" color is often desirable, there sometimes also exists a need or desire to achieve certain levels of light transmission defined conventionally by:
Lta as visible light transmission,
UV as ultraviolet light transmission, and
IR as infrared light transmission.
Glass thickness ranges of from about 1-6 mm, more preferably from about 3-4 mm, are typically used when measuring the aforesaid characteristics. These thickness ranges are generally recognized as conventional thicknesses for glass sheets made by the float glass process, as well as recognized thickness ranges in the automotive industry.
For automotive windows (including windshields) it is often desirable for glass to have one or more of the following characteristics at any or all of the aforesaid thicknesses:
Lta: at least about 70% UV: no greater than about 52%, more preferably no greater than 50%
IR: no greater than about 46%, more preferably no greater than 42% Classically formulated grey glasses often include low levels of iron (i.e., less than 0.2% total iron) along with cobalt and nickel oxides. Unfortunately, while this type of glass may achieve satisfactory coloration in certain instances, it typically suffers from undesirable solar characteristics. Certain nickel-free grey glasses combine selenium (Se) and cobalt (Co) oxide with iron oxide, but also suffer from poor solar performance characteristics.
Certain known green solar control float glasses are formulated so as to achieve desirable solar characteristics due in large part to their use of large quantities of total iron (e.g., 0.60 to 0.84% total iron). Unfortunately, the green coloration of such glasses does not always harmonize well with certain exterior automotive paints and sometimes affects vehicle interiors when viewed through the glass. In view of the above, it is apparent that there exists a need in the art for a new glass composition which overcomes the above problems while achieving one or more of desired grey color and desired solar management property(ies) of the particular application in which it is to be used.
SUMMARY OF THE INVENTION
An object of this invention is to provide a grey glass (i.e., having a dominant wavelength of from 435 nm to 570 nm) including a colorant portion which may include at least from 0.20 to 2.50 %, by weight, erbium oxide (e.g., Er203), from about 0.10 to 0.90%, by weight total iron (expressed as Fe203); and from about 0.05 to 1.60%, by weight, holmium oxide (e.g., Ho203); and from about 0.10 to 2.0%, by weight, yttrium oxide (e.g., Y203). The combination of erbium oxide, iron oxide, holmium oxide, and yttrium oxide provides for desirable color and/or solar characteristics in different embodiments of this invention.
In certain example embodiments of this invention, one or more of the above listed needs and/or objects is/are fulfilled by providing a glass comprising:
Ingredient wt.%
yttrium oxide: 0.10 - 2.0% total iron: 0.10 - 2.0 % erbium oxide: 0.20 - 2.50 % holmium oxide: 0.05 - 1.60 %.
In other example embodiments of this invention, one or more of the above-listed objects and/or needs is fulfilled by providing a grey glass comprising: a base glass portion comprising:
Ingredient wt. %
Y203 0.10 - 2.0 % SiO2 67-75%
Na2O 10-20%
CaO 5 - 15 %
MgO 0-5%
Al2O3 0-5%
K2O 0-5%
BaO 0-1 % and a colorant portion consisting essentially of:
Ingredient wt.%
total iron: 0.10-0.90% erbium oxide: 0.20 - 2.50 % selenium: 0.0 - 2.0 %
cobalt oxide: 0.0 - 0.0050 %
titanium oxide: 0.0 - 2.0 %
boron oxide: 0.0 - 2.0 %
holmium oxide: 0.05 - 1.60 %
1 thulium oxide: 0.0 - 2.0 %
ytterbium oxide: 0.0 - 3.0 %
lutetium oxide: 0.0 - 1.0 %
wherein the grey glass has a dominant wavelength in the range of from 435 nm to 570 nm.
In certain embodiments, the glass may be grey in color and have an excitation
purity (Pe) of no greater than about 4.5%. In certain exemplary embodiments, the glass or glass composition is substantially free of cerium and/or nickel.
While grey color is preferred in certain embodiments, this invention is not so limited. Colorant portions herein may be used in conjunction with other glass colors in alternative embodiments of this invention.
DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS OF THIS
INVENTION
Glasses according to different embodiments of this invention may be used, for example, in the automotive industry (e.g., windshields, backlites, side windows, etc.), in architectural applications, and in other suitable applications. Such glasses may be grey, or otherwise colored in different embodiments of this invention.
Certain glasses according to this invention utilize soda-lime-silica flat glass as their base composition/glass, to which is added certain ingredients making up a unique colorant portion. An exemplary soda-lime-silica base glass according to certain embodiments of this invention, on a weight percentage basis, includes the following basic ingredients:
Table 1; Exemplary Base Glass
Ingredient Wt. %
Si02 67 - 75 % Na20 10 - 20 %
CaO 5 - 15 %
MgO 0 - 5 %
A1203 0 - 5 %
K20 0 - 5 % BaO 0 - 1 %
Y203 0.10 - 2.0 % It is noted that in certain preferred embodiments of this invention, the Yttrium oxide (Y203) is added to the base glass along with the colorants. However, because Y203 is knows to be essentially colorless in glass, it is listed and considered herein as part of the base glass as opposed to the colorant portion. In certain preferred embodiments of this invention, the glass composition (before and after the melt) includes from about 0.10 to 2.0% Y203, more preferably from about 0.10 to 1.0% Y203, and even more preferably from about 0.10 to 0.6% Y203.
Other minor ingredients, including various conventional and refining aids, such as S03, carbon, gypsum, CaS04 and the like may also be included in the base glass. In certain embodiments, for example, glass herein may be made from batch raw materials silica sand, soda ash (or NaOH as a soda source), dolomite, limestone, with the use of salt cake (S03) and/or Epsom salts (e.g., about a 1:1 combination of both) as refining agents. Reducing agent(s) such as Si (metallic), Si, silicon monoxide, SiO, sucrose, and/or carbon may also be used. Preferably, soda-lime-silica base glasses herein include by weight from about 10-15% Na20 and from about 6-12% CaO. While a soda-lime-silica base glass set forth above is preferred in certain embodiments of this invention, this invention is not so limited. Thus, other base glasses (e.g., borosilicate glass) may instead be employed in alternative embodiments.
To the base glass (e.g., see Table 1 above), the instant invention adds a colorant portion which may cause the resulting glass to be grey in color (e.g., dominant wavelength of from 435nm to 570 nm) and/or achieve desirable solar management properties (e.g., low UV and IR transmission coupled with high visible transmission). In certain preferred embodiments, the resulting glass is grey in color and has a dominant wavelength of from 480 nm - 560 nm (nanometers). Moreover, the resulting glass preferably has an excitation purity (Pe) no greater than about 4.5%, and most preferably from 0.2% to 4.5%.
In certain embodiments of this invention, an exemplary colorant portion that is added to the base glass is substantially free of cerium and nickel (i.e., no more than 0.0030% Ce, CeO, and/or Ce02, and no more than 0.0010% Ni and/or NiO), and is characterized in final glasses as set forth in Table 2 below (in terms of weight percentage of the total glass composition):
Table 2: Exemplary Colorant Portion
Ingredient General wt.% More Preferred wt. %
total iron (expressed as Fe203): 0.10 - 0.90 % 0.20 - 0.70 %
erbium oxide (e.g., Er203): 0.20 - 2.50 % 0.30 - 2.1 %
selenium (Se): 0.0 - 2.0 % 0.0002 - 0.0050 %
cobalt oxide (e.g., Co304): 0.0 - 0.0050 % 0.0005 - 0.0030 %
titanium oxide (e.g., Ti02): 0.0 - 2.0 % 0.01 to 0.5 %
boron oxide (e.g., B203): 0.0 - 2.0 % 0.0 - 1.0 %
holmium oxide (e.g., Ho203): 0.05 - 1.60 % 0.10 - 0.60 %
thulium oxide (e.g., Tm203): 0.0 - 2.0 % 0.0 - 1.0 %
ytterbium oxide (e.g., Yb203): 0.0 - 3.0 % 0.0 - 2.0 %
lutetium oxide (e.g., Lu203): 0.0 - 1.0 % 0.0 - 0.80 %
It should be appreciated that small amounts of other materials (e.g., refining aids, melting aids, and/or impurities) may be present in the glass such as chromium, manganese, molybdenum, tin, chlorine, zinc, zirconium, Si, sulfate, fluorine, lithium and strontium, without taking away from the purpose(s) and/or goal(s) of the instant invention. It is also noted that up to about 2.0% total iron may be used in certain embodiments of this invention.
The total amount of iron present in the glass and in the colorant portion thereof is expressed herein in terms of Fe203 in accordance with standard practice. This, however, does not imply that all iron is actually in the from of Fe203. Likewise, the amount of iron in the ferrous state is reported herein as FeO, even though all ferrous state iron in the glass may not be in the form of FeO. The proportion of the total iron in the ferrous state (i.e., FeO) is used to determine the redox state of the glass, and is expressed as the ratio FeO/ Fe203, which is the weight percentage (%) of iron in the ferrous state (expressed as FeO) divided by the weight percentage (%) of total iron (expressed as Fe203). Thus, Fe203 herein means total iron and FeO means iron in the ferrous state. According to certain embodiments of this invention, the colorant portion of the glass composition herein is characterized by a redox value (i.e., FeO/ Fe203) of from 0.10 to 0.25, more preferably from 0.12 to 0.20.
Moreover, it is noted that glass according to this invention is often made via the known float process in which a tin bath is utilized. It will thus be appreciated by those skilled in the art that as a result of forming the glass on molten tin in certain exemplary embodiments, small amounts of tin or tin oxide may migrate into surface areas of the glass on the side that was in contact with the tin bath during manufacture (i.e., typically, float glass may have a tin oxide concentration of 0.05% or more (wt.) in the first few microns below the surface that was in contact with the tin bath). Glasses of this invention, as stated above, may in certain non-limiting embodiments achieve a true grey or neutral grey color. Such a true "grey" color is best defined, as aforesaid, by referring to: (1) "dominant wavelength", and/or (2) "excitation purity." Other colors are also possible in other embodiments of this invention. In certain embodiments, glasses herein include one or more of the following color/solar characteristics when measured at a nominal thickness of from about 1mm - 6mm (and preferably for most uses, at about 3mm - 4mm):
Table 3: Exemplary Transmissive Color/Solar Characteristics
Characteristic General More Preferred
L* (111. D65, 10 deg. observer): 85 - 96 86-94
a* (111. D65, 10 deg. observer): - 5.0 to +4.0 -4.0 to +2.0
b* (111. D65, 10 deg. observer): -4.0 to +3.0 -2.0 to +2.5
Lta (visible transmittance): >= 65% >= 70% IRtransmission: <= 46% <= 42%
UV%: <= 52% <= 50%
When used in the automotive market for windows and/or windshields that must conform to certain minimal visible light transmission properties, certain example glass articles of this invention (e.g., at 3 mm thicknesses for purposes of reference) preferably have an Lta of at least 65%, more preferably of at least about 70% and, in certain embodiments of least about 72%, and in still further instances at least about 75%; and/or an IR transmission percentage (%) of no greater than 46%. Additionally, in certain exemplary embodiments, glasses herein have a UV transmission percentage (%) of no greater than about 52%, more preferably no greater than about 50%, and sometimes no greater than 46%. These optical characteristics relate to example embodiments only, and are not limiting upon the invention as a whole unless specifically claimed herein.
The glasses of this invention achieve the above unique characteristics (i.e., desired color in combination with desired solar management properties, e.g., Lta, UV, IR) in base glasses (e.g., silicate glasses such as soda-lime-silica, or borosilicate glasses) through the use of the unique colorant portions discussed herein. Erbium acts as a pink colorant, holmium as a pale yellow colorant, and the FeO aspect of the total iron acts as a blue colorant. As discussed above, selenium and cobalt may be utilized in the colorant portion for coloration purposes to achieve the desired grey color.
With regard to Se, in certain embodiments Se may be introduced into the glass batch in amounts of, for example, from 5-20 ppm. In order to increase retention of Se and to improve homogeneity of the glass through a more uniform Se distribution in the melt, compositions of this invention may use various sources of Se, such as sodium and/or calcium selenites, iron and or cobalt selenides, and/or metallic Se powder. Moreover, while Se often combines with iron as iron selenide (FeSe) in glass to produce brown color, and does so in certain embodiments of this invention, selenium is referred to in the colorant portion herein as "Se" which is meant to include, for example, its state as Se as well as other states in glass such as FeSe. While the use of Se is preferred in the colorant portion as discussed above, it is noted that in some embodiments Se need not be present.
Regarding cobalt (Co), this blue colorant may be added to the glass batch in amounts of, for example, 10-30 ppm. Moreover, it is believed that much of the cobalt in the glass is in the oxide state of Co304. However, other oxide states of CoO are also possible in glasses according to this invention. Thus, unless expressly stated to the contrary, the terms cobalt oxide, CoO and Co304 as used herein include not only cobalt in this/these particular oxide state(s), but also include(s) cobalt which may be present in other oxide state(s). Holmium oxide acts as a pale yellow colorant. Moreover, it is believed that much of the holmium in the glass is in the oxide state of Ho203. However, other oxide states of HoO are also possible in glasses according to this invention. Thus, unless expressly stated to the contrary, the terms holmium oxide, HoO and Ho203 as used herein include not only holmium in this/these particular oxide state(s), but also include(s) holmium which may be present in other oxide state(s). Also, with regard to Er, unless expressly stated to the contrary, the terms erbium oxide, ErO and Er203 as used herein include not only Er in this/these particular oxide state(s), but also include(s) Er which may be present in other oxide state(s). The same is true of other oxides herein, including but not limited to yttrium oxide. Colorant elements Ho, Er, Tm, Yb and Lu are all lanthanides or rare earth elements, as is Yttrium (Y). Thus, as can be seen herein, in certain preferred embodiments a plurality of different lanthanides (or rare earth elements) are used in the glass composition together with iron in order to achieve the desired glass color. This is advantageous in that lanthanides are often grouped together when mined, and thus the ability to use multiple lanthanides together as a colorant portion is more cost efficient than previous methods of adding colorants such as Er. For example and without limitation, a three element concentrate including oxides of Er, Ho and Y may be added to the base glass in order to color the same as will be explained in the examples below (regardless of when Y is added to the glass composition, whether or not along with Er and Ho, it is considered part of the base glass because it is essentially colorless and does not act as a colorant herein). In other embodiments, a different plurality of rare earth oxides may be added to the base glass. In some embodiments of this invention three or more lanthanides combine with at least iron in order to achieve the desired glass color and/or solar characteristics. For purposes of example only, and without limitation, a three element Er inclusive concentrate available from Tianjio International Trading Co. (U.S.A.), Inc., Burlingame, CA (e.g., Y-Ho-Er oxide concentrate), may be used to add the aforesaid lanthanides. This particular concentrate includes, by weight percentage, about 17.27% Y203, about 68.29% Er203, and about 13.63% Ho203 (as well as trace amounts of other elements). Accordingly, in certain preferred embodiments the composition includes at least three times as much Er203 as Y203. In other embodiments of this invention, two, three or four different lanthanides may be used together with iron to achieve the desired glass color and/or solar characteristics. In certain embodiments of this invention, the wt. % of all lanthanides or rare earth elements (including the lanthanide oxides listed above) in the glass composition put together is from 0.8 to 5.0%, more preferably from 1.0 to 3.0 %. In certain preferred embodiments, glass compositions herein have more erbium oxide (Er203) than any of holmium oxide (Ho203), yttrium oxide (Y203), ytterbium oxide, or lutetium oxide taken individually. In certain preferred embodiments, glass compositions herein have at least twice as much erbium oxide (Er203) as holmium oxide (Ho203). In certain preferred embodiments, glass compositions herein have at least twice as much erbium oxide (Er203) as yttrium oxide
EXAMPLES
The glasses of this invention may be made from batch ingredients using well known glass melting and refining techniques once given the above final glass analysis. For example, in a conventional batch technique for melting, the following base glass batch was used for the Examples herein (note: the below-listed ingredients in the batch will add up to 100% by weight once oxides thereof are accounted for; thus, they need not add up to one hundred as raw materials): Table 4: Base Glass for Examples 1-6
Batch Ingredient for Base Glass Parts by Wt.
sand 71.5 soda ash 23.7 dolomite 18.32 limestone 6.1
Epsom salt 0.9
Sucrose 0.3
In addition to the base glass materials above, the colorant portions for Examples 1-6 herein of different embodiments of this invention were as follows (wt. % of total glass) in amounts added to the base batch. It is noted that Y203 is not a colorant, and is listed in Table 5 below along with the colorant for purposes of simplicity only because it was added to the glass batch therewith as part of the aforesaid three element concentrate.
Table 5: Colorant Portions for Examples 1-6 (except Y^O^ not a colorant)
Compound/Element Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6
total iron (Fe203): 0.45 0.45 0.45 0.45 0.65 0.45 erbium oxide (e.g., Er203): 0 0..668833 1.21 1.23 0.683 2.01 0 Se as Na2Se03: 0.003 0.002 0.0022 0.0025 0.0 0 cobalt oxide (Co304): 0.002 0.002 0.0029 0.0029 0.0015 0 holmium oxide (Ho203): 0 0..113377 0.243 0.25 0.137 0.40 0 yttrium oxide (Y203): 0.17 0.301 0.31 0.17 0.50 0.5
It is noted that much of the Se added to the batch as Na2Se03 burned/burns off during the melt (so that a much smaller amount of Se is in the glass composition of the final glass product). The remaining elements in Table 5 above are believed to have substantially remained in the final glasses of Examples 1-6. It is noted that Example 6 is provided for comparison purposes, to illustrate the undesirable color associated with glass composition if the Er and/or Ho is not present in the composition (see extreme a* value below).
Solar characteristics for Examples 1-6 were as follows, where Lta, a*, b*, and L* were transmissive (a*, b* and L* data were taken via 111. D65, 10 deg. observer), where TS stands for total solar, and each glass sample was about 3 mm thick:
Table 6: Solar Characteristics of Examples 1-6
Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6
Thickness (mm): 3 3 3 3 3 3
% Lta: 70.9 71.0 68.89 70.99 70.72 78.74
% UV: 48.85 51.37 49.79 52.38 44.75 54.82
% IR: 45.45 40.61 40.85 42.37 34.36 33.03
% (TS) 57.13 54.7 54.01 56.04 50.67 54.36 a* -0.9 -0.35 -0.5 -2.0 -1.2 -6.2 b* 1.2 -0.03 -0.97 -1.63 -0.6 -1.1
L* 87.46 87.55 86.61 87.87 87.59 91.99
In manufacturing the glasses of Examples 1-6 above, the base glass batch material together with the colorant portion was melted. Thereafter, it was annealed at about 620 degrees C for half an hour, and then allowed to cool down to room temperature. The example glasses (i.e., samples) were then polished to the desired thickness and spectral measurements above were taken to determine the light transmittance in the wavelength range from 250 to 2,000 nm. The results are set forth in the tables above. Also, each of Examples 1-5 was grey in color and had a dominant wavelength of from 480 nm - 560 nm (nanometers), and an excitation purity (Pe) from 0.2% to 4.5%. It is noted that luminous transmittance (Lta) (2 degree observer) is understood in the art, and is used herein in accordance with its known meaning, e.g., see U.S. Patent No. 5,308,805 (e.g., see ASTM E308). This term is also known as 111. A visible transmittance (380 - 780 nanometers inclusive), and its measurements are made in accordance with CIE Publication 15.2 (1986)) and ASTM E308. The terms, and characteristics, of ultraviolet light transmittance (%UV) , infrared energy transmittance (%IR), dominant wavelength (DW) and excitation purity (i.e. % "purity", or Pe) are also well understood terms in the art, as are their measurement techniques. Such terms are used herein, in accordance with well known meaning, e.g., see U.S. Patent No. 5,308,805. In particular, ultraviolet transmittance (%UV) is measured herein using Parry Moon Air Mass = 2 (300 - 400 nm inclusive, integrated using Simpson's Rule at 10 nm intervals). IR transmittance is conventionally measured using Simpson's Rule and Parry Moon Air Mass = 2 over the wavelength range 800 - 2100 nm inclusive at 50 nm intervals. Dominant wavelength (DW) is calculated and measured conventionally in accord with the aforesaid CIE Publication 15.2 (1986) and ASTM: E 308-90. The term "dominant wavelength" includes both the actual measured wavelength and, where applicable, its calculated complement. Excitation purity (Pe or % "purity") is measured conventionally in accordance with CIE Publication 15.2 (1986) and ASTM: E 308-90.
It is noted that according to different embodiments of this invention, glass compositions herein may be manufactured via single batch melting techniques, or alternatively via multiple pre-batch mixing techniques utilizing separate pre-batch mixes that are ultimately mixed together to make up a final overall batch mixture. For example, in the latter approach, one of the prebatch mixes could be made up of the iron- containing ingredient (e.g. rouge) along with SiO (silicon monoxide) and optionally, metallic Si (i.e. the reducing agents), and preferably some of the sand. The remaining batch ingredients can then be made up by admixing them in another separate prebatch mix or into two or more prebatch mixes before admixing them with the iron and reducing agent-containing first prebatch mix. After each separate prebatch mix is separately mixed, to form a substantially homogenous powdered admixture, the two or more prebatch mixes are mixed together to form the overall (or final) batch mixture. Conventional melting and refining techniques are then used to form a molten glass from which flat sheet glass or other articles may be formed. Once given the above disclosure many other features, modifications and improvements will become apparent to the skilled artisan. Such features, modifications and improvements are therefore considered to be a part of this invention, the scope of which is to be deteπnined by the following claims:

Claims

WHAT IS CLAIMED IS:
1. A grey glass comprising:
a base glass portion comprising:
Ingredient wt.%
γ2o3 0.10-2.0%
SiO2 67-75%
Na2O 10-20%
CaO 5 - 15 %
MgO 0-5%
Al2O3 0-5%
K2O 0-5%
BaO 0-1% and a colorant portion consisting essentially of:
Ingredient wt.% total iron: 0.10-0.90% erbium oxide: 0.20 - 2.50 %
selenium: 0.0-2.0%
cobalt oxide: 0.0 - 0.0050 %
titanium oxide: 0.0 - 2.0 %
boron oxide: 0.0 - 2.0 %
holmium oxide: 0.05 - 1.60 %
thulium oxide: 0.0 - 2.0 %
ytterbium oxide: 0.0 - 3.0 %
lutetium oxide: 0.0 - 1.0 % wherein the grey glass has a dominant wavelength in the range of from 435 nm to 570 nm.
2. The glass of claim 1, wherein the glass has an excitation purity (Pe) of no greater
than about 4.5%, and wherein the glass comprises at least three times as much erbium
oxide as Y203.
3. The glass of claim 2, wherein said dominant wavelength and excitation purity
are measured at a nominal thickness of the glass of anywhere from about 3mm to 4mm.
4. The glass of claim 1, wherein the glass is substantially free of cerium.
5. The glass of claim 4, wherein the glass is substantially free of nickel.
6. The glass of claim 1, further comprising a redox value FeO/ Fe203 of from 0.10
to 0.25.
7. The glass of claim 1, wherein the colorant portion consists essentially of:
Ingredient wt.%
total iron: 0.20 - 0.70 % erbium oxide: 0.30 - 2.1 %
selenium: 0.0002 - 0.0050 %
cobalt oxide: 0.0005 - 0.0030 %
titanium oxide: 0.0 - 0.5 %
boron oxide: 0.0 - 1.0 %
holmium oxide: 0.10 - 0.60 %
thulium oxide: 0.0 - 1.0 % ytterbium oxide: 0.0 - 2.0 %
lutetium oxide: 0.0 - 0.80 %.
8. The glass of claim 1, wherein the glass has a visible transmission Lta of at least
about 70%.
9. The glass of claim 8, wherein the glass has an IR transmission of no greater than
about 46%.
10. The glass of claim 1, wherein the colorant portion includes at least twice as much
erbium oxide as holmium oxide.
11. The glass of claim 10, wherein the composition includes from about 0.10 to 1.0%
Y2O3.
12. The glass of claim 1, wherein the glass has a transmissive color characterized as
follows:
a* from -4.0 to +2.0
b* from -2.0 to +2.5.
13. A glass comprising:
a base glass portion comprising:
Ingredient wt. %
Figure imgf000019_0001
Si02 67 - 75 %
Na20 10 - 20 %
CaO 5 - 15 % MgO 0-5%
Al2O3 0-5%
K2O 0-5%
BaO 0-1% and a colorant portion comprising:
Ingredient wt.%
total iron: 0.10-0.90% erbium oxide: 0.20-2.50% selenium: 0.0 - 2.0%
cobalt oxide: 0.0 - 0.005 %
titanium oxide: 0.0-2.0%
boron oxide: 0.0-2.0%
holmium oxide: 0.05-1.60%
thulium oxide: 0.0 - 2.0 %
ytterbium oxide: 0.0 - 3.0 %
lutetium oxide: 0.0-1.0%.
14. The glass of claim 13, wherein the glass is grey in color and has an excitation
purity (Pe) of no greater than about 4.5%, and a dominant wavelength in the range of
from 435 nm to 570 nm.
15. The glass of claim 14, wherein the dominant wavelength and excitation purity
are measured at a nominal thickness of the glass of anywhere from 3mm to 4mm.
16. The glass of claim 13, wherein the glass is substantially free of cerium.
17. The glass of claim 13, wherein the glass is substantially free of nickel.
18. The glass of claim 13, wherein the glass composition comprises from about 0.10
to 0.60% Y2O3, and the colorant portion comprises:
Ingredient wt.%
total iron: 0.20 - 0.70 % erbium oxide: 0.30 - 2.1 %
selenium: 0.0002 - 0.0050 %
cobalt oxide: 0.0005 - 0.0030 %
titanium oxide: 0.0 - 0.5 %
boron oxide: 0.0 - 1.0 %
holmium oxide: 0.10 - 0.60 %
thulium oxide: 0.0 - 1.0 %
ytterbium oxide: 0.0 - 2.0 %
lutetium oxide: 0.0 - 0.80 %.
19. The glass of claim 13, wherein the glass has a visible transmission Lta of at least
about 65%.
20. The glass of claim 19, wherein the glass has an IR transmission of no greater
than about 46% and a UV transmission of no greater than about 52%.
21. The glass of claim 13, wherein the colorant portion includes at least twice as
much erbium oxide as holmium oxide, and wherein the composition includes from
about 0.10 to 0.60% Y2O3.
22. A glass comprising from about 0.10 to 2.0% by weight Y203, and wherein the
glass has a colorant portion comprising:
Ingredient wt.%
total iron: 0.10-2.0% erbium oxide: 0.20-2.50% . holmium oxide: 0.05 - 1.60 %.
23. The glass of claim 22, wherein the glass comprises from 0.10 to 0.60% Y203,
and the colorant portion comprises 0.10 - 0.90 % total iron.
24. Glass comprising:
Ingredient wt.%
yttrium oxide: 0.10 - 2.0% total iron: 0.10-2.0% erbium oxide: 0.20 - 2.50 % holmium oxide: 0.05 - 1.60 %.
25. The glass of claim 24, comprising:
Ingredient wt.%
yttrium oxide: 0.10-1.0% total iron: 0.10-0.90% erbium oxide: 0.30-2.10% holmium oxide: 0.10 - 0.60 %.
26. The glass of claim 24, wherein the glass is formed so as to have a dominant
wavelength in the range of from 435 nm to 570 nm, and an excitation purity (Pe) of no
greater than about 4.5%, and to be grey in color.
27. The glass of claim 24, further comprising:
SiO2 67 - 75 %
Na2O 10 - 20 %
CaO 5 - 15 %
MgO 0 - 5 %
Al2O3 0 - 5 % K2O 0 - 5 %
BaO 0 - 1 %.
28. The glass of claim 24, wherein the glass comprises at least three times as much
erbium oxide as yttrium oxide.
29. Glass formed so as to have a dominant wavelength in the range of from 435 nm
to 570 nm, and an excitation purity (Pe) of no greater than about 4.5%, and wherein the
glass comprises 0.10 to 2.0% yttrium oxide, and a colorant portion of the glass
comprises iron oxide and at least two different lanthanide oxides, where a sum total of
all of the lanthanide oxides in the glass is from 1.0 to 5.0 %, by weight.
30. The glass of claim 29, wherein the glass comprises at least three times as much
erbium oxide as yttrium oxide.
PCT/US2002/028707 2001-09-26 2002-09-10 Grey glass composition including erbium, holmium, and/or yttrium WO2003027036A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/962,843 US6716780B2 (en) 2001-09-26 2001-09-26 Grey glass composition including erbium, holmium, and/or yttrium
US09/962,843 2001-09-26

Publications (1)

Publication Number Publication Date
WO2003027036A1 true WO2003027036A1 (en) 2003-04-03

Family

ID=25506408

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/028707 WO2003027036A1 (en) 2001-09-26 2002-09-10 Grey glass composition including erbium, holmium, and/or yttrium

Country Status (2)

Country Link
US (1) US6716780B2 (en)
WO (1) WO2003027036A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102917993A (en) * 2010-05-27 2013-02-06 Ppg工业俄亥俄公司 Blue glass composition

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2804949B1 (en) * 2000-02-11 2002-09-06 Saint Gobain Vitrage SILICO-SODO-CALCIUM TYPE GRAY GLASS COMPOSITIONS
US7037869B2 (en) * 2002-01-28 2006-05-02 Guardian Industries Corp. Clear glass composition
US7135425B2 (en) * 2002-12-13 2006-11-14 Guardian Industries Corp. Grey glass composition
TWI245026B (en) * 2003-05-23 2005-12-11 Picvue Optoelectronics Interna Composition for producing glass substrate
US7601660B2 (en) * 2004-03-01 2009-10-13 Guardian Industries Corp. Clear glass composition
US20050202951A1 (en) * 2004-03-15 2005-09-15 Guardian Industries Corp. Method of making float glass
US7700869B2 (en) * 2005-02-03 2010-04-20 Guardian Industries Corp. Solar cell low iron patterned glass and method of making same
US7625830B2 (en) * 2005-02-10 2009-12-01 Ppg Industries Ohio, Inc. Blue glass composition
US7622410B2 (en) * 2005-02-23 2009-11-24 Guardian Industries Corp. Grey glass composition
US7700870B2 (en) * 2005-05-05 2010-04-20 Guardian Industries Corp. Solar cell using low iron high transmission glass with antimony and corresponding method
US7772144B2 (en) * 2005-08-04 2010-08-10 Guardian Industries Corp. Glass composition for improved refining and method
US7488538B2 (en) * 2005-08-08 2009-02-10 Guardian Industries Corp. Coated article including soda-lime-silica glass substrate with lithium and/or potassium to reduce sodium migration and/or improve surface stability and method of making same
US7538054B2 (en) * 2005-08-09 2009-05-26 Guardian Industries Corp. Grey glass composition including erbium, neodymium and/or praseodymium
US20070074757A1 (en) * 2005-10-04 2007-04-05 Gurdian Industries Corp Method of making solar cell/module with porous silica antireflective coating
US7585801B2 (en) * 2005-11-02 2009-09-08 Ppg Industries Ohio, Inc. Gray glass composition
US20070113881A1 (en) * 2005-11-22 2007-05-24 Guardian Industries Corp. Method of making solar cell with antireflective coating using combustion chemical vapor deposition (CCVD) and corresponding product
US8153282B2 (en) * 2005-11-22 2012-04-10 Guardian Industries Corp. Solar cell with antireflective coating with graded layer including mixture of titanium oxide and silicon oxide
US7825051B2 (en) * 2006-01-12 2010-11-02 Ppg Industries Ohio, Inc. Colored glass compositions
US20070207912A1 (en) * 2006-03-02 2007-09-06 Guardian Industries Corp. Method of making glass including use of boron oxide for reducing glass refining time
US8648252B2 (en) * 2006-03-13 2014-02-11 Guardian Industries Corp. Solar cell using low iron high transmission glass and corresponding method
US7557053B2 (en) * 2006-03-13 2009-07-07 Guardian Industries Corp. Low iron high transmission float glass for solar cell applications and method of making same
US20080022721A1 (en) * 2006-07-25 2008-01-31 Bernd Disteldorf Method of making glass including surface treatment with aluminum chloride at or just prior to annealing lehr
US8677782B2 (en) * 2006-07-25 2014-03-25 Guardian Industries Corp. Method of making glass including surface treatment with aluminum chloride at or just prior to annealing LEHR
US20080072956A1 (en) * 2006-09-07 2008-03-27 Guardian Industries Corp. Solar cell with antireflective coating comprising metal fluoride and/or silica and method of making same
US7560402B2 (en) * 2006-10-06 2009-07-14 Guardian Industries Corp. Clear glass composition
US7560403B2 (en) * 2006-10-17 2009-07-14 Guardian Industries Corp. Clear glass composition with erbium oxide
US8637762B2 (en) * 2006-11-17 2014-01-28 Guardian Industries Corp. High transmission glass ground at edge portion(s) thereof for use in electronic device such as photovoltaic applications and corresponding method
US7767253B2 (en) * 2007-03-09 2010-08-03 Guardian Industries Corp. Method of making a photovoltaic device with antireflective coating
US8237047B2 (en) * 2007-05-01 2012-08-07 Guardian Industries Corp. Method of making a photovoltaic device or front substrate for use in same with scratch-resistant coating and resulting product
US20080295884A1 (en) * 2007-05-29 2008-12-04 Sharma Pramod K Method of making a photovoltaic device or front substrate with barrier layer for use in same and resulting product
WO2009010315A1 (en) * 2007-07-18 2009-01-22 Brandenburgische Technische Universität Cottbus Covering glass for a solar module
US8450594B2 (en) * 2007-07-26 2013-05-28 Guardian Industries Corp. Method of making an antireflective silica coating, resulting product and photovoltaic device comprising same
US8445774B2 (en) * 2007-07-26 2013-05-21 Guardian Industries Corp. Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US7932198B2 (en) * 2007-09-04 2011-04-26 Guardian Industries Corp. Grey glass composition
US7863208B2 (en) * 2007-09-04 2011-01-04 Guardian Industries Corp. Grey glass composition
US20090075092A1 (en) * 2007-09-18 2009-03-19 Guardian Industries Corp. Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US20090101209A1 (en) * 2007-10-19 2009-04-23 Guardian Industries Corp. Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US20090101203A1 (en) * 2007-10-23 2009-04-23 Guardian Industries Corp. Method of making an antireflective silica coating, resulting product, and photovoltaic device comprising same
US7923063B2 (en) 2007-12-10 2011-04-12 Centre Luxembourgeois De Recherches Pour Le Verre Et La Ceramique S.A. (C.R.V.C.) Method of making glass including surface treatment with aluminum chloride using combustion deposition prior to deposition of antireflective coating
US8114472B2 (en) * 2008-01-08 2012-02-14 Guardian Industries Corp. Method of making a temperable antiglare coating, and resulting products containing the same
US20090181256A1 (en) * 2008-01-14 2009-07-16 Guardian Industries Corp. Methods of making silica-titania coatings, and products containing the same
US8668961B2 (en) * 2008-07-31 2014-03-11 Guardian Industries Corp. Titania coating and method of making same
US20100122728A1 (en) * 2008-11-17 2010-05-20 Fulton Kevin R Photovoltaic device using low iron high transmission glass with antimony and reduced alkali content and corresponding method
US20100255980A1 (en) * 2009-04-03 2010-10-07 Guardian Industires Corp. Low iron high transmission glass with boron oxide for improved optics, durability and refining, and corresponding method
US8617641B2 (en) * 2009-11-12 2013-12-31 Guardian Industries Corp. Coated article comprising colloidal silica inclusive anti-reflective coating, and method of making the same
US9272949B2 (en) 2010-07-09 2016-03-01 Guardian Industries Corp. Coated glass substrate with heat treatable ultraviolet blocking characteristics
US9983064B2 (en) 2013-10-30 2018-05-29 Corning Incorporated Apparatus and methods for measuring mode spectra for ion-exchanged glasses having steep index region
KR20160088353A (en) 2013-11-19 2016-07-25 코닝 인코포레이티드 Multichroic Glasses
US9919958B2 (en) 2014-07-17 2018-03-20 Corning Incorporated Glass sheet and system and method for making glass sheet
US9891164B2 (en) 2015-08-27 2018-02-13 Honeywell Limited Holmium oxide glasses as calibration standards for near infrared moisture sensors
EP3887328A2 (en) 2018-11-26 2021-10-06 Owens Corning Intellectual Capital, LLC High performance fiberglass composition with improved specific modulus
JP2022511737A (en) 2018-11-26 2022-02-01 オウェンス コーニング インテレクチュアル キャピタル リミテッド ライアビリティ カンパニー High performance fiberglass composition with improved modulus
CN113816605B (en) * 2021-09-01 2022-09-13 北京科技大学 Imitated color sapphire glass and preparation method and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663474A (en) * 1968-10-04 1972-05-16 Owens Illinois Inc Erbium oxide/ytterbium oxide doped glass lasers
US5036025A (en) * 1990-10-02 1991-07-30 Hoya Optics Inc. Infrared absorbing green glass
EP0538941A1 (en) * 1991-10-25 1993-04-28 ENICHEM S.p.A. An improved sol-gel method for the preparation of monolithic multicomponent oxide glasses
US5413971A (en) * 1993-09-14 1995-05-09 Mcpherson; Donald M. Laser absorbing filter glass
EP1041050A1 (en) * 1999-03-29 2000-10-04 Guardian Industries Corp. Grey glass composition and method of making same

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309070A (en) 1940-09-17 1943-01-19 Battelle Memorial Institute Process for the preparation of selenium ruby glass
US2414413A (en) 1942-07-28 1947-01-14 Battelle Memorial Institute Selenium-containing glass
US2382282A (en) 1942-11-05 1945-08-14 Battelle Memorial Institute Selenium ruby glass
US2524719A (en) 1946-11-26 1950-10-03 American Optical Corp Glass composition
US3121628A (en) 1959-01-08 1964-02-18 Owens Illinois Glass Co Manufacture of glass for electron tube envelopes
FR79153E (en) 1960-01-14 1963-02-15
JPS4945690B1 (en) 1968-01-10 1974-12-05
JPS5243649B2 (en) 1974-03-09 1977-11-01
FR2293328A1 (en) 1974-12-03 1976-07-02 Saint Gobain TINTED WINDOWS FOR MOTOR VEHICLES
US4999321A (en) 1990-03-02 1991-03-12 Alfred University Optical glass composition
DE4203578C2 (en) 1991-02-08 2000-10-19 Nippon Sheet Glass Co Ltd Glass for vehicles
JPH04280834A (en) 1991-03-08 1992-10-06 Nippon Sheet Glass Co Ltd Colored glass
US5190896A (en) 1991-07-22 1993-03-02 Schott Glass Technologies, Inc. Contrast enhancement in glass
FR2682101B1 (en) 1991-10-03 1994-10-21 Saint Gobain Vitrage Int COLORED GLASS COMPOSITION FOR MAKING WINDOWS.
JPH0597469A (en) 1991-10-11 1993-04-20 Nippon Sheet Glass Co Ltd Glass for vehicle
DE69311197T2 (en) 1992-03-19 1997-09-18 Central Glass Co Ltd Infrared and ultraviolet radiation absorbing, neutral gray colored glass
US5214008A (en) 1992-04-17 1993-05-25 Guardian Industries Corp. High visible, low UV and low IR transmittance green glass composition
IL103372A (en) 1992-10-04 1995-08-31 Technion Res & Dev Foundation Glass compositions and uses thereof
US6136736A (en) 1993-06-01 2000-10-24 General Electric Company Doped silica glass
CZ279603B6 (en) 1993-11-03 1995-05-17 Vysoká Škola Chemicko-Technologická Crystal lead-free glass with refractive index greater than 1.52
AU666830B2 (en) 1993-11-16 1996-02-22 Ppg Industries Ohio, Inc. Gray glass composition
US5446007A (en) 1994-05-10 1995-08-29 Schott Glass Technologies, Inc. Brown contrast enhancement glass
US6413893B1 (en) 1996-07-02 2002-07-02 Ppg Industries Ohio, Inc. Green privacy glass
DE69718927T2 (en) 1996-07-02 2003-11-27 Ppg Ind Ohio Inc Green confidentiality glass
JP3419259B2 (en) 1996-08-21 2003-06-23 日本板硝子株式会社 UV and infrared absorbing low transmission glass
JPH10101369A (en) 1996-10-01 1998-04-21 Nippon Sheet Glass Co Ltd Ultraviolet ray and infrared ray absorbing glass
JPH10139475A (en) 1996-11-13 1998-05-26 Nippon Sheet Glass Co Ltd Ultraviolet and infrared rays absorbing and low transmittance glass
JPH10182183A (en) 1996-12-19 1998-07-07 Nippon Sheet Glass Co Ltd Low ultraviolet and infrared transmission glass
US6001753A (en) 1996-12-20 1999-12-14 Libbey-Owens-Ford Co. Spectral modifiers for glass compositions
US6420288B2 (en) * 1997-11-10 2002-07-16 Ivoclar Ag Process for the preparation of shaped translucent lithium disilicate glass ceramic products
US6376403B1 (en) 1998-04-17 2002-04-23 Nippon Sheet Glass Co., Ltd. Glass composition and process for producing the same
JP2001316128A (en) 2000-03-02 2001-11-13 Nippon Sheet Glass Co Ltd Pale colored high transmittance plate-glass and method for manufacturing same
US6624102B2 (en) 2000-09-18 2003-09-23 Nippon Sheet Glass Co., Ltd. Ultraviolet and infrared radiation absorbing green glass
US6498118B1 (en) * 2001-06-27 2002-12-24 Guardian Industries Corp. Grey glass composition including erbium and holmium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663474A (en) * 1968-10-04 1972-05-16 Owens Illinois Inc Erbium oxide/ytterbium oxide doped glass lasers
US5036025A (en) * 1990-10-02 1991-07-30 Hoya Optics Inc. Infrared absorbing green glass
EP0538941A1 (en) * 1991-10-25 1993-04-28 ENICHEM S.p.A. An improved sol-gel method for the preparation of monolithic multicomponent oxide glasses
US5413971A (en) * 1993-09-14 1995-05-09 Mcpherson; Donald M. Laser absorbing filter glass
EP1041050A1 (en) * 1999-03-29 2000-10-04 Guardian Industries Corp. Grey glass composition and method of making same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102917993A (en) * 2010-05-27 2013-02-06 Ppg工业俄亥俄公司 Blue glass composition
CN102917993B (en) * 2010-05-27 2015-08-26 Ppg工业俄亥俄公司 Blue colored glass composition

Also Published As

Publication number Publication date
US6716780B2 (en) 2004-04-06
US20030114290A1 (en) 2003-06-19

Similar Documents

Publication Publication Date Title
US6716780B2 (en) Grey glass composition including erbium, holmium, and/or yttrium
US6498118B1 (en) Grey glass composition including erbium and holmium
US6573207B2 (en) Grey glass composition including erbium
US6521558B2 (en) Grey glass composition including erbium
US7325417B2 (en) Glass composition with low visible and IR transmission
US6403509B2 (en) Grey glass composition and method of making same
EP0821659B1 (en) Colored glass compositions
US6927186B2 (en) Glass composition including sulfides having low visible and IR transmission
US7538054B2 (en) Grey glass composition including erbium, neodymium and/or praseodymium
WO1995018075A1 (en) A glass composition
JPH03187946A (en) Infrared and ultraviolet ray absorbing green glass and window glass and window material for vehicular use
US6821918B2 (en) Gray and bronze glass composition
CA2508442C (en) Grey glass composition
US20070213196A1 (en) High transmission grey glass composition with reduced iron
JP3910520B2 (en) Reduced blue glass composition without amber color
JP4024198B2 (en) Green glass composition
US6672108B2 (en) Method of making glass with reduced Se burnoff
EP1408013A2 (en) Ultraviolet and infrared ray absorbing colored glass plate
KR100379643B1 (en) A batch composition for manufacturing UV/IR absorption glass and the composition of said glass manufactured thereof
MXPA97008101A (en) Color glass compositions

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG UZ VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP