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A kind of low contact resistance 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: 2022-04-19
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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  • A kind of low contact resistance resistance paste
  • A kind of low contact resistance resistance paste
  • A kind of low contact resistance resistance paste

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: Ruthenium nitrate is dissolved in pure water to form Ru 3+ Solution A with an ion concentration of 1mol / L was dissolved in pure water to form Pb 2+ Solution B with an ion concentration of 1mol / L was added to pure water to form a suspension C with a graphyne concentration of 5g / L.

[0025] Step 2: Follow Ru 3+ with Pb 2+ The molar ratio is 1:1, the 500mL solution A and 500mL solution B are added dropwise to 1000mL suspension C under stirring conditions, and after the solution A and B are added dropwise, stop stirring and stand for 24 hours.

[0026] Step 3: After standing the solution, the liquid in the upper layer of the precipitate is extracted, and pure water is re-added to the extracted liquid and stirred for 10 minutes, and then left to stand for 24 hours.

[0027] Step 4: Repeat step 3 twice, then filter and freeze-dry the underlying sediment.

[0028] Step 5: Calcinate the...

Embodiment 2

[0059] Example 2 and the use of graphite composite lead ruthate and carbon black composite lead ruthate as a conductive phase in the proportion of 1, 2, indicating that the use of graphite alkyne composite lead ruthate as a conductive phase, in order to obtain excellent temperature coefficient, electrostatic discharge, encapsulation rate of change, contact resistance is small.

[0060] Example 2 is compared with the proportions 3, 4, 5, 6, illustrating that when preparing graphyne composite lead ruthate by chemical deposition method, it is necessary to freeze dry, vacuum calcination process, which is applied to the resistance slurry to obtain the characteristics of excellent temperature coefficient and small contact resistance.

[0061] Example 2 is compared with a counter-proportional ratio of 7 to 14, indicating that whether it is directly using ruthenium dioxide and lead oxide and graphite alkyne, carbon black or graphite composite, or directly using lead ruthate and graphite a...

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Abstract

The invention discloses a low contact resistance type resistance paste. The mass percentage of the resistance paste is composed of: conductive powder 15%-45%, glass bonding phase 20%-40%, additive 1%-10%, Organic carrier 30%~45%; the conductive powder is graphyne composite lead ruthenate prepared by chemical deposition method, and the glass binder phase is lead borosilicate glass powder with softening temperature of 500~600°C. The resistance paste of 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 present invention belongs to the field of resistance slurry technology, specifically relates to a resistance slurry with low contact resistance characteristics. Background [0002] Thick film resistance paste is a technology-intensive product that integrates metallurgy, chemistry, materials, electronic technology, analysis and testing technology and other multidisciplinary fields. In order to adapt to printing and sintering process requirements and practical application requirements, it must have printability, functional characteristics and process compatibility. The commonly used resistance slurry is a paste that is mixed in a certain proportion of functional phase, bonding phase, additive and organic carrier. [0003] As a raw material for the production of thick film sliding resistors, resistance slurries are required to have a good temperature coefficient and meet the requirements of low contact resistance of thick film sliding resistor products. T...

Claims

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Application Information

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Patent Type & Authority Patents(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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