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Low contact resistance type resistance paste

A technology of low contact resistance and resistance paste, which is applied in the direction of sliding contact resistors, resistors, adjustable resistors, etc., can solve the problems of contact point heating and sparking, resistor failure, etc., to achieve smooth surface and small contact resistance , the effect of strong process adaptability

Active Publication Date: 2022-03-01
西安宏星电子浆料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing resistance pastes are applied to thick film sliding resistors. During the sliding process of the resistors, due to the high contact resistance, the contact points will be heated and ignited, which will cause the resistors to fail.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] 1. Preparation of conductive powder

[0023] Preparation of Conductive Phase 1:

[0024] Step 1: Dissolve ruthenium nitrate in pure water to form Ru 3+ Solution A with an ion concentration of 1 mol / L; dissolve lead nitrate in pure water to form Pb 2+ Solution B with an ion concentration of 1 mol / L; adding graphyne into pure water to form a suspension C with a graphyne concentration of 5 g / L.

[0025] Step 2: Follow Ru 3+ with Pb 2+ The molar ratio was 1:1, 500 mL of solution A and 500 mL of solution B were added dropwise to 1000 mL of suspension C under stirring conditions. After the dropwise addition of solutions A and B, the stirring was stopped and allowed to stand for 24 hours.

[0026] Step 3: Extract the upper layer liquid of the sediment from the solution after standing, add pure water to the extracted liquid, stir for 10 minutes, and leave it for 24 hours.

[0027] Step 4: After repeating the operation of Step 3 twice, the bottom sediment was suction filter...

Embodiment 2

[0059] In Example 2 and Comparative Examples 1 and 2, graphite composite lead ruthenate and carbon black composite lead ruthenate are used as conductive phases to compare, and it is illustrated that graphdiyne composite lead ruthenate is used as conductive phase to obtain excellent temperature coefficient, electrostatic discharge, The package change rate and the contact resistance are small.

[0060] Example 2 is compared with Comparative Examples 3, 4, 5, and 6, which shows that when the chemical deposition method is used to prepare the graphdiyne composite lead ruthenate, it is necessary to pass the freeze-drying and vacuum calcination process, and it is applied in the resistance slurry to obtain excellent temperature coefficient. , The contact resistance is small.

[0061] Example 2 is compared with Comparative Examples 7 to 14, indicating that whether it is directly composited with ruthenium dioxide and lead oxide and graphdiyne, carbon black or graphite, or directly compo...

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Abstract

The invention discloses a low contact resistance type resistance paste. The resistance paste comprises the following components in percentage by mass: 15-45% of conductive powder, 20-40% of a glass binding phase, 1-10% of an additive and 30-45% of an organic carrier, wherein the conductive powder is graphdiyne composite lead ruthenate prepared by a chemical deposition method, and the glass binding phase is lead borosilicate glass powder with the softening temperature of 500-600 DEG C. The resistance paste disclosed by the invention has the characteristics of good temperature coefficient and small contact resistance, and can meet the use requirements of resistance paste products for thick-film sliding resistors and electric tools.

Description

technical field [0001] The invention belongs to the technical field of resistance paste, and particularly relates to a resistance paste with low contact resistance characteristics. Background technique [0002] Thick film resistor paste is a technology-intensive product integrating metallurgy, chemistry, materials, electronic technology, analysis and testing technology and other multidisciplinary fields. It must have printability, functional properties and process compatibility in order to adapt to printing, sintering process requirements and practical application requirements. The commonly used resistance paste is a paste that is mixed with functional phase, binder phase, additives and organic carrier in a certain proportion. [0003] As the raw material for the production of thick film sliding resistors, resistance paste is required to have a good temperature coefficient and meet the requirements of low contact resistance for thick film sliding resistor products. The exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/14H01C10/30H01B13/00H01B1/20
CPCH01B1/14H01B1/20H01B13/00H01C10/305
Inventor 鹿宁张建益党丽萍王妮王顺顺王明奎
Owner 西安宏星电子浆料科技股份有限公司
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