CN100556839C - Be used for composition and enhancement method that glass is strengthened - Google Patents
Be used for composition and enhancement method that glass is strengthened Download PDFInfo
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- CN100556839C CN100556839C CNB2005101167582A CN200510116758A CN100556839C CN 100556839 C CN100556839 C CN 100556839C CN B2005101167582 A CNB2005101167582 A CN B2005101167582A CN 200510116758 A CN200510116758 A CN 200510116758A CN 100556839 C CN100556839 C CN 100556839C
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Abstract
Be used for chemical enhancing composition that flat-panel monitor is strengthened with ultra-thin white glass, said composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, wherein, gross weight with said composition is a benchmark, the content of described saltpetre is 90-99 weight %, the content of potassium hydroxide is 0.01-0.5 weight %, and the content of aluminium sesquioxide is 0.01-10 weight %.After adopting composition provided by the invention that glass is strengthened, obtained before the glass intensity ratio is handled significantly improving, average isostatic pressing strength reaches more than 120 newton, smooth in appearance, smooth, and can cut normally.
Description
Technical field
The invention relates to a kind of composition and enhancement method that glass is strengthened, the chemical enhancing composition and the enhancement method of more specifically saying so and ultra-thin white glass being strengthened about a kind of.
Background technology
Glass is a kind of hard brittle material, and its tensile strength is very low.The intensity of hard brittle material depends on its surface tissue to a great extent, though it is very complete smooth that the surface of glass seems, in fact has a large amount of tiny cracks, these tiny cracks are under the tension stress effect, originally be that crackle enlarges, will begin to break from the surface then.Therefore, if can eliminate the influence of these crizzles, the tensile strength of glass just can significantly improve.Because there are various defectives in self structure and the production technique in glass, make the actual tensile strength of glass far below theoretical strength.In order to improve glass intensity, just need carry out secondary processing to glass, that is, glass is strengthened.The enhancement method of glass roughly can be divided into two classes, and a class is a physical method, and a class is a chemical process.
Physical strengthening method is meant a glass heats, when glass begins to soften, and the cooling of coming out of the stove rapidly, the outside surface of glass at first cools off hardening, has so just formed toughened glass.But the toughened glass (perhaps half tempered glass) that obtains through physical strengthening method can not cut, when bump that is subjected to sharp object or scuffing, can be easier to be more cracked than simple glass, and broken back forms the fine grained chippings of no sharp keen corner angle.
Chemical enhanced method is broadly divided into three kinds: ion exchange method, hydrofluoric acid etch and glass surface coating.In these three kinds of methods, be most widely used with ion exchange method, the condition of this enhancement method is simple, and strengthening effect is remarkable.Ion exchange method can be divided into two kinds of high temperature ion exchange method and low-temperature ion exchange processes again.The high temperature ion exchange method is meant that the temperature of ion-exchange is more than the softening temperature of glass, high temperature ion-exchange has two types usually: first type for being strengthened by extrusion effect, promptly exchange small ion with heavy ion, second type strengthens for the surface produces the low bulk crystallization, this is the low-expansion coefficient crystallite that utilizes ion-exchange to produce at glass surface, because the coefficient of expansion of the glass surface after the exchange is lower than the coefficient of expansion of glass inside, can produce stress after the cooling, thereby reach the enhanced purpose.But because the high temperature ion exchange method is to carry out more than the softening temperature of glass, therefore at high temperature, glass is easy to generate distortion, and therefore causes the damage of optical property, and high temperature also can cause more energy consumption.The low-temperature ion exchange process is meant that ion-exchange occurs in below the softening temperature of glass, glass is immersed in the high-temperature molten salt of ionic radius greater than the alkali metal compound of contained alkalimetal ion in the glass, or with the solution spraying of salt on the heated glass surface, the ion that the glass surface volume is little is just replaced by bulky ion in the exchange fused salt then.After glass cools, glass network is shunk, bulky ion needs bigger space, thereby make glass surface produce racking stress, and the inner tension stress that produces, form the compressive layer of glass surface densification thus, the existence of compressive layer has reduced the tiny crack of glass surface, thereby reaches the effect of reinforcing glass intensity.
CN1162363C discloses a kind of production technique of chemically toughened glass, this technology is to add potassium hydroxide in the saltpetre fused salt, aluminium sesquioxide and diatomite additive, make the saltpetre fused salt, the usage ratio of additive is: with potassium hydroxide/saltpetre weight percent is 1, aluminium sesquioxide/saltpetre weight percent is 10-30, the weight percent of diatomite/saltpetre is 100-150, the saltpetre fused salt mixt that configures is heated to 400-500 ℃ of insulation, to clean in advance, the glass that oven dry is good is preheating to 350 ℃, constant temperature 30 minutes, glass is immersed in the fused salt, constantly under 400 ℃ temperature, after 3-8 hour glass is slowly taken out from fused salt, enter in the very approaching annealing furnace of a temperature and temperature of molten salt and be annealed to room temperature.Although this production technique can effectively improve glass intensity, the chilled glass that adopts this processing method to obtain is a toughened glass, can't cut at all.
The thickness of ultra-thin white glass that is applied to flat-panel monitor is usually below 2 millimeters, be generally the 0.3-1.1 millimeter, because of its intensity obviously not enough, breakage can take place when carrying or improper use, therefore need carry out further processing treatment to this ultra-thin white glass, but, adopt general chemical process to strengthen after, ultra-thin white glass is easy to take place intensity and does not rise anti-phenomenon of falling.And the described processing method of CN1162363C still is not suitable for flat-panel monitor is strengthened with ultra-thin white glass, therefore flat-panel monitor is had higher requirement with the reinforcement of ultra-thin white glass.
Summary of the invention
The method that the objective of the invention is to solve the chilled glass of prior art is not suitable for defective that flat-panel monitor is strengthened with ultra-thin white glass, be used for glass and provide a kind of, particularly composition and the enhancement method strengthened with ultra-thin white glass of flat-panel monitor.
The present inventor is through discovering, during the used fused salt of the production technique of the disclosed chemically toughened glass of CN1162363C is filled a prescription, gross weight with fused salt is a benchmark, the content of described potassium hydroxide is 0.5-0.9 weight %, because the potassium hydroxide too high levels in the fused salt can produce corrosion to glass, make the glass surface after the reinforcement very coarse, and adopting the glass after the reinforcement that this technology obtains is toughened glass, though the strength of glass height but can not cut.And flat-panel monitor is to be used to make flat-panel display device with ultra-thin white glass, be used in particular for making LCD (liquid-crystal display) display screen, therefore very high to the requirement of glass, need this glass to have smooth, slick surface and good optical performance on the one hand, and very thin thickness, be generally the 0.3-1.1 millimeter, on the other hand, require also very strict glass intensity, if insufficient strength, then glass breaks easily, if intensity is too high, then glass can not cut.Therefore, the disclosed production technique of CN1162363C is not suitable for being applied to ultra-thin glass, is below 2 millimeters as thickness, and particularly thickness is the reinforcement of the flat-panel monitor of 0.3-1.1 millimeter with ultra-thin white glass.
The invention provides a kind of chemical enhancing composition that flat-panel monitor is strengthened with ultra-thin white glass of being used for, said composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, wherein, gross weight with said composition is a benchmark, the content of described saltpetre is 90-99 weight %, the content of potassium hydroxide is 0.01-0.5 weight %, and the content of aluminium sesquioxide is 0.01-10 weight %.
The enhancement method of glass is included under 350-480 ℃, glass is contacted with fused chemistry enhancing composition, described glass is ultra-thin white glass, described chemical enhancing composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, wherein, be benchmark with the gross weight of said composition, the content of described saltpetre is 90-99 weight %, the content of potassium hydroxide is 0.01-0.5 weight %, and the content of aluminium sesquioxide is 0.01-10 weight %.
Chemical enhancing composition provided by the invention can be to glass, be particularly suitable for ultra-thin white glass, as the ultra-thin white glass of flat-panel monitor, especially thickness is strengthened with ultra-thin white glass at the flat-panel monitor of 0.3-1.1 millimeter, glass after the reinforcement that obtains has smooth and even curface, intensity is brought up to original 2-3 doubly, it is undeformed to strengthen back glass, the decay of no optics performance, the more important thing is that the glass after the reinforcement can normally cut, and the flat-panel monitor after strengthening is with ultra-thin bending resistance from glass, compressive strength has obtained significant raising.In addition, adopt enhancement method provided by the invention, can reduce and strengthen temperature, and shorten enhanced time greatly, and reduce energy consumption, improved efficient.
Description of drawings
What Fig. 1 represented is the pressure tester that glass is carried out strength test.
Embodiment
According to the chemical enhancing composition that flat-panel monitor is strengthened with ultra-thin white glass of being used for provided by the invention, under the preferable case, gross weight with said composition is a benchmark, the content of described saltpetre is 95-99 weight %, the content of potassium hydroxide is 0.01-0.2 weight %, and the content of aluminium sesquioxide is 0.01-5 weight %.
Described potassium hydroxide plays the effect of accelerating ion-exchange speed in the strengthening process of glass, impel potassium ion can more easily diffuse into glass, and sodium ion also can overflow more like a cork from glass.Because potassium hydroxide has certain corrosive nature to glass, for the ultra-thin white glass after guaranteeing to strengthen has even curface, under the preferable case, gross weight with described enhancing composition is a benchmark, the content of described potassium hydroxide is controlled at 0.01-0.5 weight %, preferably is controlled in the scope of 0.01-0.2 weight %.
According to chemical enhancing composition provided by the invention, also contain other sylvite in the described composition, described other sylvite is selected from one or more in potassiumphosphate, potassium nitrite, Repone K, vitriolate of tartar, potassium silicate, potassium hydrogen phosphate, the potassium bichromate, gross weight with said composition is a benchmark, the content of described other sylvite is 0-10 weight %, is preferably 0.01-5 weight %.
The method of the reinforcement of described glass is included under 350-480 ℃, glass is contacted with fused chemistry enhancing composition, described glass is ultra-thin white glass, described chemical enhancing composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, wherein, be benchmark with the gross weight of said composition, the content of described saltpetre is preferably 95-99 weight %, the content of potassium hydroxide is preferably 0.01-0.2 weight %, and the content of aluminium sesquioxide is preferably 0.01-5 weight %.
According to method provided by the invention, also contain other sylvite in the described composition, described other sylvite is selected from one or more in potassiumphosphate, potassium nitrite, Repone K, vitriolate of tartar, potassium silicate, potassium hydrogen phosphate, the potassium bichromate, gross weight with said composition is a benchmark, the content of described other sylvite is 0-10 weight %, is preferably 0.01-5 weight %.
Described fused chemistry enhancing composition is that in other sylvite that saltpetre, potassium hydroxide, aluminium sesquioxide and selectivity are contained one or more carry out fusion and the fused salt that obtains under 420-500 ℃ temperature; Under the preferable case, described melting process under agitation carries out, and the speed of stirring and fused time are not particularly limited, as long as make the complete fusion of described salt.
Described glass is preferably 360-450 ℃ with the temperature that contacts of fused salt, more preferably described glass slowly is heated to earlier after contacting temperature to contact with described fused salt again, and is immersed in the fused salt; Described contact is carried out in the fused salt groove.
More abundant for the exchange that makes sodium ion in the described glass and the potassium ion in the fused salt, be 5-150 minute the duration of contact of described glass and fused salt, is preferably 10-80 minute.
Described enhancement method also comprises annealing, cleans and the exsiccant step, and described annealed temperature is 360-500 ℃, is preferably 370-470 ℃.Described cleaning and exsiccant method and condition can be carried out according to the method for well known to a person skilled in the art.
Described ultra-thin white glass can be commercially available, as, the STN substrate glass (single-sided polishing) that can adopt NHTechno company to produce.
The following examples will the present invention will be further described.
Embodiment 1
Present embodiment illustrates the enhancement method of ultra-thin white glass
99 weight part saltpetre, 0.1 weight part potassium hydroxide, 0.4 weight part potassiumphosphate, 0.5 weight part aluminium sesquioxide are mixed.This mixture is put into the good fused salt groove of heat-proof quality, under agitation, at the uniform velocity be warming up to 460 ℃, keep cooling the temperature to 420 ℃ after 15 minutes and obtain fused salt.
The ultra-thin white glass (the STN substrate glass that NHTechno company produces) that will be of a size of 470 * 370 * 0.5 millimeter slowly is heated to 400 ℃, then the submergence in above-mentioned fused salt of this ultra-thin white glass was taken out after 45 minutes, and allow the melting salt of its surface attachment wander naturally, in 420 ℃ annealing chamber, anneal then and clean, ultra-thin white glass B1 is strengthened after the drying.
Embodiment 2
Present embodiment illustrates the enhancement method of ultra-thin white glass
99 weight part saltpetre, 0.01 weight part potassium hydroxide, 0.04 weight part potassiumphosphate, 0.05 weight part aluminium sesquioxide are mixed.This mixture is put into the good fused salt groove of heat-proof quality, under agitation, at the uniform velocity be warming up to 480 ℃, keep cooling the temperature to 435 ℃ after 20 minutes and obtain fused salt.
To be of a size of 470 * 370 * 0.5 ultra-thin white glass (the STN substrate glass that NHTechno company produces) and slowly be heated to 430 ℃, then submergence in the above-mentioned melting salt of this ultra-thin white glass was taken out after 80 minutes, and allow the melting salt of its surface attachment wander naturally, in 430 ℃ annealing chamber, anneal then and clean, drying is strengthened ultra-thin white glass B2
Embodiment 3
Present embodiment illustrates the enhancement method of ultra-thin white glass
96 weight part saltpetre, 0.05 weight part potassium hydroxide, 3.95 weight part aluminium sesquioxides are mixed.This mixture is put into the good fused salt groove of heat-proof quality, under agitation, at the uniform velocity be warming up to 420 ℃, keep cooling the temperature to 380 ℃ after 10 minutes and obtain fused salt.
To be of a size of 470 * 370 * 0.5 ultra-thin white glass (the STN substrate glass that NHTechno company produces) and slowly be heated to 380 ℃, then the submergence in above-mentioned melting salt of this ultra-thin white glass was taken out after 60 minutes, and allow the melting salt of its surface attachment wander naturally, in 380 ℃ annealing chamber, anneal then and clean, drying is strengthened ultra-thin white glass B3.
Performance test
Chilled glass that embodiment 1-3 is obtained and former untreated ultra-thin glass carry out strength test.
The isostatic pressing strength of ultra-thin glass B1-B3 after the employing pressure tester mensuration process intensive treatment as shown in Figure 1 and former untreated ultra-thin glass B0.
Testing method: ultra-thin white glass B1-B3 of reinforcement that embodiment 1-3 is made and former untreated ultra-thin glass B0 carry out the test of isostatic pressing strength one by one.Glass to be measured is placed on the support platen, pressure cone is at the uniform velocity pressed down with the speed of 0.02 meter per second, when glass is crushed when splitting, the data on the record digital display manometer, be the maximum static pressure power that the unit surface upper glass can bear, be expressed as the isostatic pressing strength of glass.
The result is as shown in table 1.
Table 1
| The embodiment numbering | The glass numbering | Isostatic pressing strength (newton) | Outward appearance |
| Embodiment 1 | B1 | 122 | Smooth smooth |
| Embodiment 2 | B2 | 125 | Smooth smooth |
| Embodiment 3 | B3 | 120 | Smooth smooth |
| Comparative Examples | B0 | 45 | Smooth smooth |
As can be seen from Table 1, after adopting enhancing composition provided by the invention that flat-panel monitor is strengthened with ultra-thin white glass, the glass appearance that obtains is smooth, smooth, and before handling, strength ratio obtained significantly improving, average isostatic pressing strength reaches more than 120 newton, the more important thing is that the glass after the reinforcement can cut normally.
Claims (8)
1, a kind of chemical enhancing composition that flat-panel monitor is strengthened with ultra-thin white glass of being used for, said composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, it is characterized in that, gross weight with said composition is a benchmark, the content of described saltpetre is 90-99 weight %, the content of potassium hydroxide is 0.01-0.2 weight %, and the content of aluminium sesquioxide is 0.01-10 weight %.
2, composition according to claim 1 wherein, is a benchmark with the gross weight of said composition, and the content of described saltpetre is 95-99 weight %, and the content of potassium hydroxide is 0.01-0.2 weight %, and the content of aluminium sesquioxide is 0.01-5 weight %.
3, composition according to claim 1, wherein, also contain other sylvite in the described composition, described other sylvite is selected from one or more in potassiumphosphate, potassium nitrite, Repone K, vitriolate of tartar, potassium silicate, potassium hydrogen phosphate, the potassium bichromate, gross weight with said composition is a benchmark, and the content of described other sylvite is 0-10 weight %.
4, composition according to claim 3 wherein, is a benchmark with the gross weight of said composition, and the content of described other sylvite is 0.01-5 weight %.
5, a kind of enhancement method of glass, this method is included under 350-480 ℃, glass is contacted with fused chemistry enhancing composition, described glass is ultra-thin white glass, and described chemical enhancing composition is the fused salt that contains saltpetre, potassium hydroxide and aluminium sesquioxide, wherein, gross weight with said composition is a benchmark, the content of described saltpetre is 90-99 weight %, and the content of potassium hydroxide is 0.01-0.2 weight %, and the content of aluminium sesquioxide is 0.01-10 weight %.
6, method according to claim 5 wherein, is a benchmark with the gross weight of said composition, and the content of described saltpetre is 95-99 weight %, and the content of potassium hydroxide is 0.01-0.2 weight %, and the content of aluminium sesquioxide is 0.01-5 weight %.
7, method according to claim 5, wherein, also contain other sylvite in the described composition, described other sylvite is selected from one or more in potassiumphosphate, potassium nitrite, Repone K, vitriolate of tartar, potassium silicate, potassium hydrogen phosphate, the potassium bichromate, gross weight with said composition is a benchmark, and the content of described other sylvite is 0-10 weight %.
8, method according to claim 7 wherein, is a benchmark with the gross weight of said composition, and the content of described other sylvite is 0.01-5 weight %.
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| CN100556839C true CN100556839C (en) | 2009-11-04 |
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Families Citing this family (12)
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| CN101328026B (en) * | 2007-06-20 | 2010-05-26 | 中国南玻集团股份有限公司 | Molten salt for glass chemistry toughening and chemical toughening method using the same |
| CN101372392B (en) * | 2007-08-20 | 2012-01-25 | 比亚迪股份有限公司 | Catalyst for chemically enhancing glass and use thereof |
| CN101397193B (en) * | 2007-09-25 | 2011-06-15 | 比亚迪股份有限公司 | Glass reinforced solution and use thereof |
| CN101428962B (en) * | 2008-12-04 | 2011-07-20 | 中国建筑材料科学研究总院 | Reinforcing method for ultra-thin lithium alumina silicate glass |
| CN102108011B (en) * | 2009-12-24 | 2013-05-29 | 比亚迪股份有限公司 | Method for reinforcing glass element |
| CN101811835B (en) * | 2010-05-11 | 2012-01-04 | 中国科学院上海光学精密机械研究所 | Phosphate laser glass surface enhanced ion exchange method |
| US8834962B2 (en) * | 2011-06-03 | 2014-09-16 | WD Media, LLC | Methods for improving the strength of glass substrates |
| KR20150058226A (en) * | 2012-09-18 | 2015-05-28 | 아사히 가라스 가부시키가이샤 | Method of regenerating molten salt for chemically toughening glass, and production method of toughened glass |
| CN102909044A (en) * | 2012-09-26 | 2013-02-06 | 南阳华祥光电科技有限公司 | Catalyst for chemical enhancement of ultrathin optical glass panel, and applications of catalyst |
| CN109677062B (en) * | 2019-02-28 | 2021-07-06 | 维沃移动通信有限公司 | Manufacturing method of glass rear cover, glass rear cover and terminal equipment |
| CN110963715A (en) * | 2019-12-27 | 2020-04-07 | 深圳市惠乐光电有限公司 | Chemical strengthening method for flexible ultrathin glass cover plate |
| CN111117624B (en) * | 2020-01-14 | 2021-12-10 | 维达力实业（赤壁）有限公司 | Glass frosting liquid and preparation method and application thereof |
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| US3743491A (en) * | 1968-12-10 | 1973-07-03 | Brockway Glass Co Inc | Method of strengthening glass and increasing the scratch resistance of the surface thereof |
Non-Patent Citations (1)
| Title |
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| 多相离子交换增强钠钙硅玻璃. 贺蕴秋，杨俊超.建筑材料学报，第6卷第4期. 2003 * |
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