CN100499940C - Rare earth electrode slurry of rare earth thick film circuit based on metal plate and its preparation technology - Google Patents
Rare earth electrode slurry of rare earth thick film circuit based on metal plate and its preparation technology Download PDFInfo
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- CN100499940C CN100499940C CNB2006100367143A CN200610036714A CN100499940C CN 100499940 C CN100499940 C CN 100499940C CN B2006100367143 A CNB2006100367143 A CN B2006100367143A CN 200610036714 A CN200610036714 A CN 200610036714A CN 100499940 C CN100499940 C CN 100499940C
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
- H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
- H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
- H01C17/06553—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of a combination of metals and oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
- H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
- H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
- H01C17/06533—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
- H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
- H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
- H01C17/06533—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of oxides
- H01C17/06546—Oxides of zinc or cadmium
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/013—Heaters using resistive films or coatings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Abstract
The invention relates to a rare-earth electrode slurry of rare-earth circuit, based on the metal base board and a relative production, wherein it is characterized in that: said slurry is formed by solid material and organic solvent carrier, while their mass ratio is 70-90:30-10; the solid component comprises: silver, palladium, and yttrium composite power and micro-crystal glass powder, while their mass percentage is 99.4-94:0.6-6; said composite power is formed by silver, palladium, and yttrium powders at the ratio as 0.6-10:99-82:0.4-8; said micro-crystal glass is the one in SiO2-Al2O3-CaO-B2O3-Bi2O3-La2O3 group. And the production comprises: (1), preparing rare-earth micro-crystal glass powder; (2), preparing silver, palladium, and yttrium composite powder; (3), preparing organic solvent carrier; (4), mixing material in three-dimension and rolling with three rollers; (5), preparing the rare-earth slurry; (6), bottling. The invention is environment friendly and better humidity compatibility.
Description
Technical field
The present invention relates to a kind of rare earth electrode slurry of rare earth thick film circuit based on metal substrate, be particularly related to based on the ferritic stainless steel series substrate, for example: GB trade mark 1Cr15, high-power rare earth thick film circuit such as 1Cr17,00Cr12 rare earth electrode slurry and fabricating technology thereof.
Background technology
Environmental protection and improve capacity usage ratio, improve the some that energy-structure is the strategy of sustainable development of China.In field of electric heating, novel heating element wants that cube is little, power wants big, thermal inertia is little, surface thermal load wants big, power consumption is low, the heat efficiency wants high, warm start is fast, power stability, temperature field evenly, good manufacturability, body be from temperature control, safe and reliable to operation, life-span is long, wide accommodation.At present, also do not have to satisfy the heating element of above-mentioned requirements, therefore the research of new electrically heating element that adopts such as rare earth thick film circuit electric heating element is imperative.
Earlier 2000s, du pont company has been used it for the stainless steel heat-generating disc of coffee pot and has been pushed Chinese market to, domestic research institutions also released the thick film circuit electric slurry that is used for stainless steel substrate in 2003 successively, but all use with a kind of substrate, same electron-like slurry comprises dielectric paste, noble metal resistance slurry (silver-colored palladium), electrocondution slurry.Its technical costs, quality cost, product quality, range of application all are restricted, especially low, the electric property of dielectric paste preparation efficiency, wettability are poor, resistance slurry stability is not good enough, cost can be in any more, also there are defectives such as silver ion easily moves under the easy oxidation of electrode slurry, the high temperature, adhesive force is not firm, cause this technology popularization application development slow.
Summary of the invention
The object of the present invention is to provide a kind ofly conduct electricity very well, strong adhesion, printing characteristic, sintering characteristic, environmental-protecting performance is good and with metal substrate, resistance slurry, dielectric paste wettability compatibility good based on rare earth electrode slurry of rare earth thick film circuit based on metal substrate.
Another object of the present invention is to provide a kind of preparation technology of above-mentioned rare earth electrode slurry of rare earth thick film circuit based on metal substrate.
The present invention realizes above-mentioned purpose by following technical solution:
The present invention is based on the rare earth electrode slurry of rare earth thick film circuit of metal substrate, be made up of solid phase composition and organic solvent carrier, its weight ratio is: (70～90): (30～10); Described solid phase composition comprises: silver-colored palladium yttrium composite powder and microcrystalline glass powder, its weight ratio is: (99.4～94): (0.6～6), the particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in this silver palladium yttrium composite powder.The weight ratio of palladium powder, silver powder and yttrium powder is: (0.6～10): (99～82): (0.4～8).
Described devitrified glass is SiO
2-Al
2O
3-CaO-B
2O
3-Bi
2O
3-La
2O
3Microcrystalline glass in series, the composition weight proportion of each oxide is: SiO
2(20～60%), Al
2O
3(5～35%), CaO (10～35%), B
2O
3(1～15%), La
2O
3(0.3～15%), Bi
2O
3(10～30%), TiO
2(1～10%), ZrO
2(1～10%).
The set of dispense of described organic solvent carrier than (weight) is: terpinol (60～98%), tributyl citrate (10～30%), ethyl cellulose (2～10%), NC Nitroncellulose (1～5%), hydrogenation castor oil (0.1～5%), lecithin (0.1～5%).
Preparation technology of the present invention is: 1. prepare the silver-colored palladium yttrium composite powder of rare earth microcrystalline glass powder → 2. prepare → 3. prepare organic solvent carrier → 4. three-dimensional blender three-roll rolling → 5. rare earth electrode slurry modulation → 6. bottle stand-by.
Adopt rare earth electrode slurry of rare earth thick film circuit and preparation technology's advantage thereof based on metal substrate of above-mentioned formula constituent to be,
1. by domestic and international thick film circuit is researched and analysed with electric slurry physics, chemical property and processing performance, Rare Earth Lanthanum (La) and yttrium (Y) are mixed in decision in electric slurry, experimental results show that in the dielectric paste that because the adding of rare earth, the electrical property of slurry, wettability, intermiscibility, intermolecular linkage bond strength and manufacturability all improve a lot.By to SiO
2-Al
2O
3-CaO-B
2O
3-La
2O
3Rare earth medium slurry microcrystalline glass formula and preparation technology are determined in the dynamic analysis that microcrystalline glass in series coefficient of dilatation, vitrification point, glass transition temperature and forming core are grown up.Make it the coefficient of expansion and metal substrate coupling,, effectively improve breakdown strength and insulation property in conjunction with firm.
2. adopt rare-earth oxidation yttrium (Y
2O
3), reducing sintering temperature, acceleration of sintering improves technology, raises the efficiency, and saves the energy.Strengthen stainless non-oxidizability and ductility, improve bond strength.
3. Rare Earth Lanthanum (La) is mixed and is greatly changed sintering character, microstructure, density, phase composition and the physical and mechanical property of microcrystal glass material phase.Thereby improve the strong bond strength of wettability, compatibility and molecule of dielectric strength, electric property, processing performance and the electric slurry of rare earth thick film circuit electric heating element.Improve technology, significantly improve the product fine rate.
4. rare earth medium slurry of rare earth thick film circuit printing performance of the present invention, sintering character are good.With rare earth resistance slurry, conductor paste good wettability and intermiscibility are arranged.
5. based on heightened awareness to each organic solvent mechanism in the rare-earth electric slurry, with the main solvent of different boiling and evaporation rate in proportion preparation rationally make slurry evenly volatilization and discharging in processes such as printing, oven dry, sintering, avoid solvent to concentrate volatilization to form defectives such as cracking, pin hole, can effectively improve product qualified rate.
6. in the organic solvent prescription, select for use fine solvent such as hydrogenation castor oil to make thixotropic agent, make slurry have good thixotropy and anti-heavy effect to form good colloform texture.
7, the purposes scope is quite extensive; The present invention joins rare earth function electric slurry and can not only prepare on metal substrate, can also prepare on devitrified glass, pottery and other metal and nonmetal substrate.Can not only prepare in the plane, can also prepare on curved surface.
In a word, the electric conductivity of rare earth electrode slurry of the present invention, solderability, contact performance are good, and the solder joint integrality is good, it is firm to connect; Material of the present invention does not need dependence on import, and 100% production domesticization reduces noble metal dosage, and with low cost, material consumption is few, and is energy-conservation; Meet the requirement of the new road toward industrialization (high in technological content, good in economic efficiency, low in resources consumption, low in the pollution of the environment) of the recycling economy that China advocates, and very strong foreign exchange earning prospect is arranged.
Rare earth thick film circuit of the present invention is applicable to ferrite series stainless steel substrate with rare earth electrode slurry and technology of preparing thereof.For example: GB trade mark 1Cr15,1Cr17,00Cr12 etc., external trade mark 429#, 430#, 410L# etc.
The present invention is by adjusting solid phase composition, content and sintering process, and this electrode slurry can be compatible with multiple metal substrate dielectric paste, resistance slurry.For example: aluminum oxide substrate (Al
2O
3), aluminium nitride (AIN) substrate, crystallite glass substrate, metal alloy aluminium, titanium alloy substrate etc.
Adopted heating element of the present invention be at present uniquely meet that volume is little, power is big, thermal inertia is little, surface thermal load is big, power consumption is low, the heat efficiency is high, warm start is fast, power stability, temperature field are even, good manufacturability, body be from temperature control, safe and reliable to operation, life-span is long, the electrical heating elements of the requirement of wide accommodation.
Embodiment
Embodiment one:
Present embodiment is the rare earth thick film circuit rare earth electrode slurry that is used for 1Cr15 (429#) series stainless steel substrate.This electrode slurry is made up of solid phase composition and organic solvent carrier, and the solid phase composition comprises silver-colored palladium yttrium composite powder and microcrystalline glass powder, its specifically fill a prescription and technology as follows:
1. microcrystalline glass formula: the composition weight proportion of each oxide is: SiO
2(28%), Al
2O
3(16%), CaO (14%), B
2O
3(7%), La
2O
3(5%), Bi
2O
3(22%), TiO
2(5%), ZrO
2(2%):
2. devitrified glass smelting technology: smelting temperature is: 1350 ℃ of insulations are after 120 minutes, and the shrend of coming out of the stove rapidly obtains the little slag of glass.The glass slag is placed two-stage ball mill ball milling, prepare particle diameter less than 3 microns microcrystalline glass powder.
3. modulate silver-colored palladium yttrium composite powder:
The particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in the silver palladium yttrium composite powder.The weight ratio of palladium powder, silver powder and yttrium powder is: 2: 97: 1.
4. organic solvent carrier compound and dissolution process: each set of dispense of organic solvent carrier than (weight) is: terpinol (78%), tributyl citrate (18%), ethyl cellulose (4%), NC Nitroncellulose (2%), hydrogenation castor oil (0.6%), lecithin (0.8%).The said ratio organic solvent is mixed the back in 85 ℃ of water temperatures, dissolve a few hours, adjust ethyl cellulose, nitrocellulose cellulose content, organic solvent carrier viscosity is controlled in the scope of 245mPas.
5. rare earth electrode slurry preparation: this slurry is made up of solid phase composition and organic solvent carrier.Weight ratio is: 78: 22.The weight ratio of silver-colored palladium yttrium composite powder and microcrystalline glass powder is in the described solid phase composition: 98.5: 1.5.The particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in the silver palladium yttrium composite powder.Slurry said ratio raw material places the three-high mill of packing into after the three-dimensional blender machine dispersed with stirring rolling, obtains rare earth electrode slurry, and the viscosity of testing size is: 186PaS/RPM.
6. rare earth electrode slurry performance:
1. electrical property:
| Side's resistance | Resolution | Tensile strength | Aging intensity |
| <5±2mΩ /□ | 0.1mm | >16(N/mm2) | >10 (N/mm2) |
2. physical property
| Rheological behavior | Resistive layer thickness | Slurry viscosity | The unit consumption |
| The suitable wire mark of thixotroping | 12 ± 2 μ m | 186PaS/RPM. | The 88cm2/ gram |
Embodiment two:
Present embodiment is the rare earth thick film circuit rare earth electrode slurry that is used for 1Cr17 (430#) series stainless steel substrate, this electrode slurry is made up of solid phase composition and organic solvent carrier, the solid phase composition comprises silver-colored palladium yttrium composite powder and microcrystalline glass powder, its concrete technology and fill a prescription as follows:
1. microcrystalline glass formula: the composition weight proportion of each oxide is: SiO
2(30%), Al
2O
3(16%), CaO (13%), B
2O
3(8%), La
2O
3(6%), Bi
2O
3(26%), TiO
2(6%), ZrO
2(3%):
2. devitrified glass smelting technology: smelting temperature is: 1350 ℃ of insulations are after 120 minutes, and the shrend of coming out of the stove rapidly obtains the little slag of glass.The little slag of glass is placed two-stage ball mill ball milling, prepare particle diameter less than 3 microns microcrystalline glass powder.
3. modulate silver-colored palladium yttrium composite powder:
The particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in the silver palladium yttrium composite powder.The weight ratio of palladium powder, silver powder and yttrium powder is: 1: 98: 1.
4. organic solvent carrier compound and dissolution process: each set of dispense of organic solvent carrier than (weight) is: terpinol (76%), tributyl citrate (17%), ethyl cellulose (3%), NC Nitroncellulose (3%), hydrogenation castor oil (0.7%), lecithin (0.3%).The said ratio organic solvent is mixed the back in 85 ℃ of water temperatures, dissolve a few hours, adjust ethyl cellulose, nitrocellulose cellulose content, organic solvent carrier viscosity is controlled in the scope of 250mPas.
5. rare earth electrode slurry preparation: this slurry is made up of solid phase composition and organic solvent carrier.Weight ratio is: 77: 23.The weight ratio of silver-colored palladium yttrium composite powder and microcrystalline glass powder is in the described solid phase composition: 98: 2.The particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in the silver palladium yttrium composite powder.Slurry said ratio raw material places the three-high mill of packing into after the three-dimensional blender machine dispersed with stirring rolling, obtains rare earth electrode slurry, and the viscosity of testing size is: 190PaS/RPM.
6. rare earth electrode slurry performance:
1. electrical property:
| Side's resistance | Resolution | Tensile strength | Aging intensity |
| <5±2m Ω/□ | 0.2mm | >15 (N/mm2) | >10 (N/mm2) |
2. physical property
| Rheological behavior | Resistive layer thickness | Slurry viscosity | The unit consumption |
| The suitable wire mark of thixotroping | 12 ± 2 μ m | 190PaS/RPM. | The 88cm2/ gram |
Claims (5)
1, a kind of rare earth electrode slurry of rare earth thick film circuit based on metal substrate is characterized in that, this slurry is made up of solid phase composition and organic solvent carrier, and the weight ratio of solid phase composition and organic solvent carrier is between 70:30～90:10; Wherein the solid phase composition comprises silver-colored palladium yttrium composite powder and microcrystalline glass powder, and silver-colored palladium yttrium composite powder and microcrystalline glass powder weight ratio are between 99.4:0.6～94:6; Described silver-colored palladium yttrium composite powder is made of following component, and the weight ratio of palladium powder, silver powder and yttrium powder is between 0.6:99:0.4～10:82:8, and wherein the particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m.
2, the rare earth electrode slurry of rare earth thick film circuit based on metal substrate according to claim 1, it is characterized in that the weight percentages of components of described organic solvent carrier is: terpinol 60～98%, tributyl citrate 10～30%, ethyl cellulose 2～10%, NC Nitroncellulose 1～5%, hydrogenation castor oil 0.1～5%, lecithin 0.1～5%.
3, the rare earth electrode slurry of rare earth thick film circuit based on metal substrate according to claim 1 is characterized in that, described devitrified glass is SiO
2-Al
2O
3-CaO-B
2O
3-Bi
2O
3-La
2O
3Microcrystalline glass in series is made up of the composition weight proportion of following oxide: SiO
220～60%, Al
2O
35～35%, CaO 10～35%, B
2O
31～15%, La
2O
30.3 Bi～15%,
2O
310～30%, TiO
21～10%, ZrO
21～10%.
4, a kind of preparation is characterized in that based on the technology of the rare earth thick film circuit electrode slurry of metal substrate: it comprises the steps,
(1) preparation microcrystalline glass powder: with following proportion raw material percentage by weight be: SiO
220～60%, Ai
2O
35～35%, CaO 10～35%, Bi
2O
310～30%, B
2O
31～15%, La
2O
30.3 TiO～15%,
21～10%, ZrO
21～10%, high melt after mixing, smelting temperature is: 1100～1450 ℃, be incubated after 1～3 hour, fast glass melts is invaded shrend in the cold water, obtain the little slag of glass, the little slag of glass is obtained particle diameter less than 3 microns glass micro mist through ball milling;
(2) the silver-colored palladium yttrium composite powder of modulation;
The particle diameter of palladium powder, silver powder and yttrium powder is less than 2 μ m in the silver palladium yttrium composite powder, and the weight ratio of palladium powder, silver powder and yttrium powder is between 0.6:99:0.4～10:82:8;
(3) organic solvent carrier;
Each weight percentages of components of organic solvent carrier is: terpinol 60～98%, tributyl citrate 10～30%, ethyl cellulose 2～10%, NC Nitroncellulose 1～5%, hydrogenation castor oil 0.1～5%, lecithin 0.1～5%, the said ratio organic solvent is mixed the back in 80～100 ℃ of water temperatures, dissolve a few hours, adjust ethyl cellulose, nitrocellulose cellulose content, organic solvent carrier viscosity is controlled in the scope of 150～280mPas;
(4) preparation rare earth electrode slurry: place the three-high mill of packing into after the three-dimensional blender machine dispersed with stirring rolling above-mentioned wet end furnish raw material, obtain rare earth electrode slurry, the viscosity of testing size is: 150～200PaS/RPM.
5, the preparation technology of the rare earth thick film circuit electrode slurry based on metal substrate according to claim 4, it is characterized in that: in the preparation microcrystalline glass powder process of described (1) step, the devitrified glass powder raw material is the crucible of packing into after mixing in the three-dimensional blender machine, place the high-temperature smelting pot melting, the little slag that the obtains agate ball bucket of packing into obtains particle diameter less than 3 microns glass micro mist with star-like ball mill ball milling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100367143A CN100499940C (en) | 2006-07-28 | 2006-07-28 | Rare earth electrode slurry of rare earth thick film circuit based on metal plate and its preparation technology |
| PCT/CN2007/002223 WO2008014677A1 (en) | 2006-07-28 | 2007-07-23 | Rare earth electrode slurry for rare earth thick-film circuit based on metal substrate and producing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100367143A CN100499940C (en) | 2006-07-28 | 2006-07-28 | Rare earth electrode slurry of rare earth thick film circuit based on metal plate and its preparation technology |
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|---|---|
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| CN100499940C true CN100499940C (en) | 2009-06-10 |
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Cited By (1)
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|---|---|---|---|---|
| CN101923911A (en) * | 2010-04-27 | 2010-12-22 | 电子科技大学 | YBCO thick film resistance paste based on stainless steel base board and preparation method thereof |
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| CN106409380A (en) * | 2016-09-27 | 2017-02-15 | 东莞珂洛赫慕电子材料科技有限公司 | Medium temperature sintering resistance slurry of aluminum alloy substrate thick film circuit and preparation method thereof |
| CN107068238A (en) * | 2016-12-09 | 2017-08-18 | 东莞珂洛赫慕电子材料科技有限公司 | A kind of aluminium alloy base plate full silver electrode paste of thick film circuit intermediate sintering temperature and preparation method thereof |
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| JP3684430B2 (en) * | 1994-12-28 | 2005-08-17 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Thick film resistor composition |
| JP2002367804A (en) * | 2001-06-11 | 2002-12-20 | K-Tech Devices Corp | Resistor |
| CN1316509C (en) * | 2001-09-06 | 2007-05-16 | 诺利塔克股份有限公司 | Conductor composition and method for production thereof |
| CN1215484C (en) * | 2002-12-30 | 2005-08-17 | 中国人民解放军国防科学技术大学 | Medium sizing agent and its producing process for high-power thick-film circuit based on stainless steel substrate |
| CN1216380C (en) * | 2002-12-30 | 2005-08-24 | 中国人民解放军国防科学技术大学 | Resistance sizing agent and its producing process for high-power thick-film circuit based on stainless steel substrate |
| CN1216381C (en) * | 2002-12-30 | 2005-08-24 | 中国人民解放军国防科学技术大学 | Conductive sizing agent and its producing process for high-power thick-film circuit based on stainless steel substrate |
| CN100386829C (en) * | 2004-07-28 | 2008-05-07 | 王克政 | PTC thick film curc uit controllable electric heating element |
-
2006
- 2006-07-28 CN CNB2006100367143A patent/CN100499940C/en active Active
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2007
- 2007-07-23 WO PCT/CN2007/002223 patent/WO2008014677A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923911A (en) * | 2010-04-27 | 2010-12-22 | 电子科技大学 | YBCO thick film resistance paste based on stainless steel base board and preparation method thereof |
| CN101923911B (en) * | 2010-04-27 | 2011-11-02 | 电子科技大学 | YBCO thick film resistance paste based on stainless steel base board and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008014677A1 (en) | 2008-02-07 |
| CN1909748A (en) | 2007-02-07 |
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