CN102924776A - Positive-temperature-coefficient (PTC) material composition, and over-current protection assembly prepared through using PTC material - Google Patents
Positive-temperature-coefficient (PTC) material composition, and over-current protection assembly prepared through using PTC material Download PDFInfo
- Publication number
- CN102924776A CN102924776A CN2011102289811A CN201110228981A CN102924776A CN 102924776 A CN102924776 A CN 102924776A CN 2011102289811 A CN2011102289811 A CN 2011102289811A CN 201110228981 A CN201110228981 A CN 201110228981A CN 102924776 A CN102924776 A CN 102924776A
- Authority
- CN
- China
- Prior art keywords
- titanium
- ptc material
- forms
- ptc
- carbide
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Abstract
The invention discloses a PTC material composition and an over-current protection assembly prepared through using the PTC material. The PTC material composition comprises a PTC polymer unit and a conductive filler containing a plurality of titanium carbide particles, wherein the titanium carbide particles contain above 0.3wt% of residual oxygen. The invention also provides the PTC over-current protection assembly.
Description
Technical field
The present invention relates to a kind of PTC material for the manufacture of overcurrent protection assembly and form and a kind of positive temperature coefficient overcurrent protection assembly, particularly relate to a kind of PTC material with titanium carbide granule and form.
Background technology
The PTC conductive macromolecular component is owing to having positive temperature coefficient effect, so can be used as overcurrent protection assembly.The PTC conductive macromolecular component comprises a PTC conductive macromolecular material and is formed on two corresponding lip-deep positive and negative electrodes of this PTC conductive macromolecular material.This PTC conductive macromolecular material comprises that the macromolecule matrix and of a tool crystalline phase district and amorphous phase region is scattered in the amorphous phase region of this macromolecule matrix and forms the conductive particle weighting material in a continuous conduction path.Positive temperature coefficient effect refers to that when the temperature of this macromolecule matrix was raised to its fusing point, this crystalline phase district began melting and produces new amorphous phase region.When the amorphous phase region is increased to a degree and combines with the former amorphous phase region of depositing, meeting is so that the conductive path of this conductive particle weighting material forms discontinuous shape, and cause the resistance of this PTC conductive macromolecular material to increase rapidly, and thereby formation outage.
The main requirement of PTC conductive macromolecular component is to have simultaneously high positive temperature coefficient effect, high conductance, high electric stability, high environmental stability.
The composition of existing PTC conductive macromolecular material generally includes a PTC conductive polymer unit and a carbon dust (carbon black) conductive filling.This PTC conductive polymer unit comprises a weight average molecular weight scope usually between 50,000g/mole to 300, the polyolefine of 000g/mole [having the melt flow rate (under the condition of 190 ℃/2.16Kg) between 0.01g/10min to 10g/10min] and a weight average molecular weight scope selectively are between 50,000g/mole to 200, the graft type polyolefine of 000g/mole [having the melt flow rate (under the condition of 190 ℃/2.16Kg) between 0.5g/10min to 10g/10min].The polyolefinic major function of this graft type is to increase PTC conductive polymer unit and interelectrode then property.
Because the conductance of carbon dust conductive filling is low, therefore be not suitable for the current protection assembly that some need higher conductance (low resistance).Promoting on the conductance, although can have by increase the kenel (metallic particles for example of the non-carbon class conductive particle weighting material of high conductivity, electroconductibility ceramic particle and surface metalation particle etc.) increase the conductance (dropping to volume specific resistance less than 0.05ohm-cm from originally 1.0ohm-cm or higher volume specific resistance) of PTC conductive macromolecular component, but described non-carbon dust conductive filling and the high molecular physical properties difference of PTC conductive are excessive, cause conductive filling that creep (creeping) easily occurs in the electroconductive polymer matrix, cause the electric stability of electroconductive polymer positive temperature coefficient assembly and work-ing life therefore to be reduced.
Summary of the invention
The object of the present invention is to provide a kind of electric stability and PTC material in work-ing life that can improve electroconductive polymer positive temperature coefficient overcurrent assembly to form.
So a kind of PTC material for the manufacture of overcurrent protection assembly of the present invention forms, and comprises: a positive temperature coefficient polymer unit; And a conductive filling, contain a plurality of titanium carbide granules.Described titanium carbide granule has a residual oxygen level greater than 0.3wt% based on its weight.
Described titanium carbide granule has one based on its weight and is not less than 0.5wt% and less than the residual oxygen level of 1.0wt%.
The residual oxygen level of described titanium carbide granule is the oxygen level in the titanium carbide product that obtains by the mixture that has titaniferous materials and carbonaceous material 1700 ℃～2000 ℃ lower carbonizations one.
This titaniferous materials is a combination of selecting from titanium dioxide, titanium tetrachloride, titanium hydride, arizonite, titanium and aforementioned substances.
Preferably, this titaniferous materials is titanium dioxide.
Preferably, this carbonaceous material is carbon black or graphite.
This positive temperature coefficient polymer unit comprises a polyolefin blend thing, and this polyolefin blend thing comprises high density polyethylene(HDPE) and unsaturated carboxylic acid graft type high density polyethylene(HDPE).And this positive temperature coefficient polymer unit accounts for the 10-30wt% that this PTC material forms, and this conductive filling accounts for the 70-90wt% that this PTC material forms.
This conductive filling also comprises an electroconductive powder, and this electroconductive powder is to select certainly in zirconium carbide, vanadium carbide, niobium carbide, tantalum carbide, chromium carbide, molybdenum carbide, wolfram varbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, surface degree nickel glass sphere, plating nickel on surface graphite, titanium tantalum Solid solution, tungsten titanium tantalum chromium Solid solution, tungsten tantalum Solid solution, tungsten titanium tantalum niobium Solid solution, tungsten titanium tantalum Solid solution, tungsten titanium Solid solution, one combination of tantalum niobium Solid solution and aforementioned substances.
Preferably, this electroconductive powder is nickel powder.
Again, a kind of positive temperature coefficient overcurrent protection assembly of the present invention comprises: a PTC material layer; And two electrodes, be located on this PTC material layer; This PTC material layer has a PTC material and forms; this PTC material forms and comprises a positive temperature coefficient polymer unit; and a conductive filling that contains a plurality of titanium carbide granules, described titanium carbide granule has a residual oxygen level greater than 0.3wt% based on its weight.Described titanium carbide granule has one based on its weight and is not less than 0.5wt% and less than the residual oxygen level of 1.0wt%.
Beneficial effect of the present invention is: to have the electric stability that can improve positive temperature coefficient overcurrent assembly greater than the titanium carbide granule of the residual oxygen level of 0.3wt% as a composition of conductive filling.
Description of drawings
Fig. 1 is a schematic diagram, and the structure of a kind of positive temperature coefficient overcurrent protection assembly of a preferred embodiment of the present invention is described.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Consult Fig. 1, a kind of positive temperature coefficient overcurrent protection assembly of the present invention comprises: a PTC material layer 2; And two electrodes 3, be arranged on this PTC material layer 2; This PTC material layer 2 has a PTC material and forms.
This PTC material forms and comprises: a positive temperature coefficient polymer unit; And a conductive filling, contain a plurality of titanium carbide granules.Described titanium carbide granule has a residual oxygen level greater than 0.3wt% based on its weight.The residual oxygen level of titanium carbide granule is defined as: contained oxygen amount in the titanium carbide granule product that a mixture with titaniferous materials (particulate state) and carbonaceous material (Powdered) at high temperature carries out obtaining after the carbonization (carbiding).Carbonization temperature is higher, and residual oxygen level is lower.When the residual oxygen level of titanium carbide granule was lower than 0.3wt%, the electric stability of PTC material had significant variation.
Better lower, the residual oxygen level of described titanium carbide granule is by the oxygen level in the titanium carbide granule product that obtains at this mixture with titaniferous materials and carbonaceous material of 1700 ℃～2000 ℃ lower carbonizations (carbiding).Better lower, described titanium carbide granule has and one is not less than (namely more than or equal to) 0.5wt% based on its weight and less than the residual oxygen level of 1.0wt%.
Better lower, the particle size range of described titanium carbide granule is preferably greater than 0.1 μ m and less than 200 μ m.
Better lower, this titaniferous materials is a combination of selecting from titanium dioxide, titanium tetrachloride, titanium hydride, arizonite (Ferro titanium ore) or titanium particle and aforementioned substances.Better lower, this titaniferous materials is to select from titanium dioxide.
Better lower, this carbonaceous material is carbon black (carbon black) or powdered graphite.
This positive temperature coefficient polymer unit can be the adulterant (polymer blend) of general existing positive temperature coefficient polymer or polymkeric substance.Better lower, this positive temperature coefficient polymer unit comprises a polyolefin blend thing.Better lower, this polyolefin blend thing comprises high density polyethylene(HDPE) and unsaturated carboxylic acid graft type high density polyethylene(HDPE).
Better lower, this positive temperature coefficient polymer unit accounts for the 10-30wt% that this PTC material forms, and this conductive filling accounts for the 70-90wt% that this PTC material forms.
Better lower, this conductive filling also comprises an electroconductive powder.This electroconductive powder is to select certainly in zirconium carbide, vanadium carbide, niobium carbide, tantalum carbide, chromium carbide, molybdenum carbide, wolfram varbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, surface degree nickel glass sphere, plating nickel on surface graphite, titanium tantalum Solid solution, tungsten titanium tantalum chromium Solid solution, tungsten tantalum Solid solution, tungsten titanium tantalum niobium Solid solution, tungsten titanium tantalum Solid solution, tungsten titanium Solid solution, one combination of tantalum niobium Solid solution and aforementioned substances.Better lower, this electroconductive powder is nickel powder.
Below embodiment and the effect of each purpose of the present invention will be described with embodiment and comparative example.It is noted that, this embodiment is only for illustrating usefulness, and should not be interpreted as restriction of the invention process.
The preparation of PTC conductive macromolecular component
＜embodiment 1 (E1) 〉
With 10g high density polyethylene(HDPE) (marque: HDPE9002, available from Formosa plastic Corp., weight average molecular weight 150000g/mole, at 230 ℃, 12.6kg under M.F.I be 45g/10min), 10g unsaturated carboxylic acid graft type high density polyethylene(HDPE) (marque: MB100D, available from Dupont, weight average molecular weight 80000g/mole, at 230 ℃, 12.6kg under M.F.I. be 75g/10min), with 80g titanium carbide powder A (TiC-A, residual oxygen level with 0.9wt%, the preparation of titanium carbide powder A are to obtain by the mixture that has titanium dioxide and carbon black 1850 ℃ of lower carbonizations one) mixing in the adding one Brabender mixing roll.Melting temperature is 200 ℃; Stirring velocity is 60rpm; Pressurization weight is 5kg; Mixing time is 10 minutes.The mixture of mixing rear gained is placed a mould, then, with thermocompressor blend sample is carried out hot pressing, hot pressing temperature is that 200 ℃, hot pressing time are that 4 minutes, hot pressing pressure are 80kg/cm
2, after the sample after will mixing is hot pressed into the thin slice that thickness is 0.12mm, respectively paste a slice nickel plating Copper Foil in the thin slice both sides, according to same hot pressing condition hot pressing, form a sandwich structure again, this sandwich structure is die-cut into the chip of 4.5mm * 3.2mm.Measure the resistance value (seeing Table 1) of embodiment 1 prepared PTC material.G-HDPE in the table 1 represents the graft type high density polyethylene(HDPE), and V-R represents volume resistance (ohm-cm).
Table 1
＜embodiment 2 (E2) 〉
The preparation procedure of the sample of embodiment 2 and condition and embodiment 1 be different, and to be in embodiment 2 are the titanium carbide powder A that replace embodiment 1 with titanium carbide powder B (TiC-B).Titanium carbide powder B has the residual oxygen level of 0.8wt%, and its preparation is to obtain by the mixture that has titanium hydride and carbon black 1960 ℃ of lower carbonizations one.Measure the resistance value (seeing Table 1) of embodiment 2 prepared PTC materials.
＜embodiment 3 (E3) 〉
The preparation procedure of the sample of embodiment 3 and condition and embodiment 1 be different, and to be in embodiment 3 are the titanium carbide powder A that replace embodiment 1 with titanium carbide powder C (TiC-C).Titanium carbide powder C has the residual oxygen level of 0.5wt%, and its preparation is to obtain by the mixture that has arizonite and graphite 1780 ℃ of lower carbonizations one.Measure the resistance value (seeing Table 1) of embodiment 3 prepared PTC materials.
＜comparative example 1 (CE1) 〉
The preparation procedure of the sample of comparative example 1 and condition and embodiment 1 be different, and to be in comparative example 1 be the titanium carbide powder A that replaces embodiment 1 with titanium carbide powder D (TiC-D).Titanium carbide powder D has the residual oxygen level of 0.2wt%, and its preparation is to obtain by the mixture that has titanium dioxide and carbon black 2200 ℃ of lower carbonizations one.Measure the resistance value (seeing Table 1) of comparative example 1 prepared PTC material.
＜embodiment 4 (E4) 〉
The preparation procedure of the sample of embodiment 4 and condition are to use the nickel powder of 60g titanium carbide powder A and 20g as conductive filler from embodiment 1 different being in embodiment 4.Measure the resistance value (seeing Table 2) of embodiment 4 prepared PTC materials.
Table 2
＜embodiment 5 (E5) 〉
The preparation procedure of the sample of embodiment 5 and condition are to use the nickel powder of 60g titanium carbide powder B and 20g as conductive filler from embodiment 1 different being in embodiment 4.Measure the resistance value (seeing Table 2) of embodiment 5 prepared PTC materials.
＜embodiment 6 (E6) 〉
The preparation procedure of the sample of embodiment 6 and condition are to use the nickel powder of 60g titanium carbide powder C and 20g as conductive filler from embodiment 1 different being in embodiment 6.Measure the resistance value (seeing Table 2) of embodiment 6 prepared PTC materials.
＜comparative example 2 (CE2) 〉
The preparation procedure of the sample of comparative example 2 and condition are to use the nickel powder of 80g as conductive filler from embodiment 1 different being in comparative example 2.Measure the resistance value (seeing Table 2) of comparative example 2 prepared PTC materials.
＜comparative example 3 (CE3) 〉
The preparation procedure of the sample of comparative example 3 and condition are to use the nickel powder of 60g titanium carbide powder D and 20g as conductive filler from embodiment 1 different being in comparative example 3.Measure the resistance value (seeing Table 2) of comparative example 3 prepared PTC materials.
Function test
Embodiment 1-6 and the prepared test chip of comparative example 1-3 are carried out periodicity test and burn-in test.Periodically test is to carry out 720 loop cycle tests under 6Vdc and 50A (ampere) and the condition of cutting off the power supply 60 seconds in 60 seconds of switching on, resistance (Ri) and the rear resistance (Rf) of test before the measurement test.Burn-in test is to continue energising 504 hours with 6Vdc and 10A (ampere), resistance (Ri) and the rear resistance (Rf) of test before the measurement test.The periodicity of embodiment 1-3 and comparative example 1 and ageing test result such as table 3 and table 4.The periodicity of embodiment 4-6 and comparative example 2-3 and ageing test result such as table 5 and table 6.
Table 3 (periodically test)
| Ri，avg，ohm | Rf，avg，ohm | Rf/Ri，avg，％ | Pass ratio，％ | |
| E1 | 0.008 | 0.0763 | 953.8％ | 100％ |
| E2 | 0.009 | 0.0565 | 627.8％ | 100％ |
| E3 | 0.009 | 0.0735 | 816.7％ | 100％ |
| CE1 | 0.008 | 13.763 | 172037.5％ | 92％ |
Table 4 (burn-in test)
| Ri，avg，ohm | Rf，avg，ohm | Rf/Ri，avg，％ | Pass ratio，％ | |
| E1 | 0.008 | 0.214 | 2675.0％ | 100％ |
| E2 | 0.009 | 0.195 | 2166.7％ | 100％ |
| E3 | 0.009 | 0.221 | 2455.6％ | 100％ |
| CE1 | 0.008 | 2.794 | 34925.0％ | 98％ |
Relatively can find out with ageing test result from the periodicity of embodiment 1-3 and comparative example 1, when the residual oxygen level of titanium carbide during near 0.2wt%, the electric stability variation of test chip.
Table 5 (periodically test)
| Ri，avg，ohm | Rf，avg，ohm | Rf/Ri，avg，％ | Pass ratio，％ | |
| E4 | 0.009 | 0.0185 | 205.6％ | 100％ |
| E5 | 0.009 | 0.0149 | 165.6％ | 100％ |
| E6 | 0.009 | 0.0204 | 226.7％ | 100％ |
| CE2 | 0.007 | 0.4496 | 6422.9％ | 70％ |
| CE3 | 0.008 | 35.97 | 449625.0％ | 92％ |
Table 6 (burn-in test)
| Ri，avg，ohm | Rf，avg，ohm | Rf/Ri，avg，％ | Pass ratio，％ | |
| E4 | 0.008 | 0.0948 | 1185.0％ | 100％ |
| E5 | 0.008 | 0.1085 | 1356.3％ | 100％ |
| E6 | 0.009 | 0.1343 | 1492.2％ | 100％ |
| CE2 | 0.007 | 69.83 | 997571.4％ | 86％ |
| CE3 | 0.008 | 98.56 | 1232000.0％ | 98％ |
Relatively can find out from the result of embodiment 4-6 and comparative example 2-3, when the residual oxygen level of titanium carbide near 0.2wt% or only use nickel powder when (not containing titanium carbide), the electric stability variation of test chip.
In sum, can improve the electric stability of electroconductive polymer PTC material as a composition of conductive filling greater than the titanium carbide granule of the residual oxygen level of 0.3wt% by use.
But the above, it only is preferred embodiment of the present invention, when not limiting scope of the invention process with this, the simple equivalence of namely generally doing according to the present patent application claim and invention description content changes and modifies, and all still belongs in the scope that patent of the present invention contains.
Claims (13)
1. the PTC material for the manufacture of overcurrent protection assembly forms, and it is characterized in that it comprises:
One positive temperature coefficient polymer unit; And
One conductive filling contains a plurality of titanium carbide granules;
Described titanium carbide granule has a residual oxygen level greater than 0.3wt% based on its weight.
2. PTC material according to claim 1 forms, and it is characterized in that: described titanium carbide granule has one based on its weight and is not less than 0.5wt% and less than the residual oxygen level of 1.0wt%.
3. PTC material according to claim 1 forms, and it is characterized in that: the residual oxygen level of described titanium carbide granule is the oxygen level in the titanium carbide product that obtains by the mixture that has titaniferous materials and carbonaceous material 1700 ℃～2000 ℃ lower carbonizations one.
4. PTC material according to claim 3 forms, and it is characterized in that: this titaniferous materials is a combination of selecting from titanium dioxide, titanium tetrachloride, titanium hydride, arizonite, titanium and aforementioned substances.
5. PTC material according to claim 4 forms, and it is characterized in that: this titaniferous materials is titanium dioxide.
6. PTC material according to claim 3 forms, and it is characterized in that: this carbonaceous material is carbon black or graphite.
7. PTC material according to claim 1 forms, and it is characterized in that: this positive temperature coefficient polymer unit comprises a polyolefin blend thing.
8. PTC material according to claim 7 forms, and it is characterized in that: this polyolefin blend thing comprises high density polyethylene(HDPE) and unsaturated carboxylic acid graft type high density polyethylene(HDPE).
9. PTC material according to claim 1 forms, and it is characterized in that: this positive temperature coefficient polymer unit accounts for the 10-30wt% that this PTC material forms, and this conductive filling accounts for the 70-90wt% that this PTC material forms.
10. PTC material according to claim 1 forms, it is characterized in that: this conductive filling also comprises an electroconductive powder, and this electroconductive powder is to select certainly in zirconium carbide, vanadium carbide, niobium carbide, tantalum carbide, chromium carbide, molybdenum carbide, wolfram varbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, surface degree nickel glass sphere, plating nickel on surface graphite, titanium tantalum Solid solution, tungsten titanium tantalum chromium Solid solution, tungsten tantalum Solid solution, tungsten titanium tantalum niobium Solid solution, tungsten titanium tantalum Solid solution, tungsten titanium Solid solution, one combination of tantalum niobium Solid solution and aforementioned substances.
11. PTC material according to claim 10 forms, it is characterized in that: this electroconductive powder is nickel powder.
12. a positive temperature coefficient overcurrent protection assembly is characterized in that it comprises:
One PTC material layer; And
Two electrodes are located on this PTC material layer;
This PTC material layer has a PTC material and forms, and this PTC material forms and comprises a positive temperature coefficient polymer unit, and a conductive filling that contains a plurality of titanium carbide granules,
Described titanium carbide granule has a residual oxygen level greater than 0.3wt% based on its weight.
13. positive temperature coefficient overcurrent protection assembly according to claim 12 is characterized in that: described titanium carbide granule has one based on its weight and is not less than 0.5wt% and less than the residual oxygen level of 1.0wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110228981.1A CN102924776B (en) | 2011-08-10 | 2011-08-10 | PTC material composition and the overcurrent protection assembly be made up of it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110228981.1A CN102924776B (en) | 2011-08-10 | 2011-08-10 | PTC material composition and the overcurrent protection assembly be made up of it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102924776A true CN102924776A (en) | 2013-02-13 |
| CN102924776B CN102924776B (en) | 2015-10-28 |
Family
ID=47639716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110228981.1A Active CN102924776B (en) | 2011-08-10 | 2011-08-10 | PTC material composition and the overcurrent protection assembly be made up of it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102924776B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333385A (en) * | 2013-05-29 | 2013-10-02 | 安徽荣玖光纤通信科技有限公司 | PTC polymer conductive material used for copper wires and preparation method thereof |
| CN106158174A (en) * | 2014-09-29 | 2016-11-23 | 聚鼎科技股份有限公司 | Positive temperature coefficient material and overcurrent protection element containing same |
| CN106298119A (en) * | 2015-05-13 | 2017-01-04 | 富致科技股份有限公司 | PTC circuit protection element |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB898602A (en) * | 1957-05-01 | 1962-06-14 | British Aluminium Co Ltd | Improvements in or relating to electrolytic cells for the production of metals |
| US3900552A (en) * | 1972-02-01 | 1975-08-19 | Us Interior | Preparation of highly pure titanium tetrachloride from perovskite or titanite |
| US4732701A (en) * | 1985-12-03 | 1988-03-22 | Idemitsu Kosan Company Limited | Polymer composition having positive temperature coefficient characteristics |
| JPH08333107A (en) * | 1995-06-07 | 1996-12-17 | Tokyo Tungsten Co Ltd | Production of powder of titanium carbide nitride |
| CN1909123A (en) * | 2005-08-05 | 2007-02-07 | 聚鼎科技股份有限公司 | Over current protection element |
| CN101763925A (en) * | 2009-12-25 | 2010-06-30 | 上海神沃电子有限公司 | Polymer positive temperature coefficient (PTC) chip and application thereof |
-
2011
- 2011-08-10 CN CN201110228981.1A patent/CN102924776B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB898602A (en) * | 1957-05-01 | 1962-06-14 | British Aluminium Co Ltd | Improvements in or relating to electrolytic cells for the production of metals |
| US3900552A (en) * | 1972-02-01 | 1975-08-19 | Us Interior | Preparation of highly pure titanium tetrachloride from perovskite or titanite |
| US4732701A (en) * | 1985-12-03 | 1988-03-22 | Idemitsu Kosan Company Limited | Polymer composition having positive temperature coefficient characteristics |
| JPH08333107A (en) * | 1995-06-07 | 1996-12-17 | Tokyo Tungsten Co Ltd | Production of powder of titanium carbide nitride |
| CN1909123A (en) * | 2005-08-05 | 2007-02-07 | 聚鼎科技股份有限公司 | Over current protection element |
| CN101763925A (en) * | 2009-12-25 | 2010-06-30 | 上海神沃电子有限公司 | Polymer positive temperature coefficient (PTC) chip and application thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333385A (en) * | 2013-05-29 | 2013-10-02 | 安徽荣玖光纤通信科技有限公司 | PTC polymer conductive material used for copper wires and preparation method thereof |
| CN106158174A (en) * | 2014-09-29 | 2016-11-23 | 聚鼎科技股份有限公司 | Positive temperature coefficient material and overcurrent protection element containing same |
| CN106158174B (en) * | 2014-09-29 | 2018-07-27 | 聚鼎科技股份有限公司 | Positive temperature coefficient material and overcurrent protection element containing same |
| CN106298119A (en) * | 2015-05-13 | 2017-01-04 | 富致科技股份有限公司 | PTC circuit protection element |
| CN106298119B (en) * | 2015-05-13 | 2019-02-15 | 富致科技股份有限公司 | PTC circuit protection element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102924776B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103943380B (en) | The preparation method of carbon porous electrode | |
| TWI480384B (en) | A positive temperature coefficient material composition for making a positive temperature coefficient circuit protection device includes a positive temperature coefficient polymer unit and a conductive filler | |
| CN105321639B (en) | overcurrent protection element | |
| CN106158174B (en) | Positive temperature coefficient material and overcurrent protection element containing same | |
| CN102924776B (en) | PTC material composition and the overcurrent protection assembly be made up of it | |
| CN100380532C (en) | Conductive composition exhibiting PTC behavior and over-current protection device using the same | |
| CN101556852A (en) | Macromolecular thermistance element and manufacturing method thereof | |
| CN102831997B (en) | Overcurrent protection element with positive temperature coefficient | |
| CN105482454B (en) | A kind of polyphenylene sulfide/polyether-ether-ketone conducing composite material and its preparation method and application | |
| TW201517086A (en) | Method of manufacturing an electrode film for electrically double layers capacitor | |
| KR20110132550A (en) | Titanium composite electrodes and methods therefore | |
| CN103242579B (en) | High electro-conductive polymer positive temperature coefficient composition and overcurrent protection element | |
| CN109651700A (en) | A kind of permanent conductive plastics particle and preparation method thereof | |
| US10982082B1 (en) | Conductive nanocomposite having a dual temperature coefficient of resistance and a method of preparing | |
| US10790074B1 (en) | PTC circuit protection device | |
| CN103258607B (en) | Over-current protecting element | |
| CN103198910B (en) | Thermistor element | |
| TWI460746B (en) | A positive temperature coefficient circuit protection device | |
| CN106189219A (en) | A kind of polymer base conductive composite material and circuit protecting element | |
| KR100864681B1 (en) | Material for preparing fuel cell separator | |
| TWI407458B (en) | Positive temperature coefficient Conductive polymer composition and its material | |
| CN106298119B (en) | PTC circuit protection element | |
| Yakisir et al. | Electronic Conductive Microporous Polymer‐Based Structures | |
| CN111834072A (en) | PTC circuit protection device | |
| JPH0741609A (en) | Electrically conductive resin composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |