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A kind of silver-based electrical contact composite material and preparation method thereof

A technology of composite materials and electric contacts, which is applied in metal material coating technology, contacts, circuits, etc., can solve the problem of welding resistance, low contact resistance, low mechanical strength, low wear resistance and arc erosion resistance, etc. problem, achieve the effect of avoiding aggregation and uniform distribution

Active Publication Date: 2017-12-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Silver / carbon electrical contact materials with excellent welding resistance and low contact resistance have been used in low and medium load relays and signal switches, but due to their low mechanical strength and low wear resistance and arc corrosion resistance limit its wider application

Method used

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  • A kind of silver-based electrical contact composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Silver-coated graphene is prepared by depositing metallic silver on the surface of graphene (1-10 layers) by DC magnetron sputtering. The silver target with a purity of 99.99% is polished with fine sandpaper before installation to remove the surface oxide film, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering to remove metal oxide on the target surface substances and other impurities to ensure the purity of the silver film deposited on the subsequent graphene surface. The sputtering parameters are as follows: the vacuum degree reaches 0.1*10 -3 At Pa, high-purity argon gas was introduced, the vacuum chamber pressure was 0.8 Pa, the sputtering power was 160 W, and the deposition time was 5 min.

[0023] (2) Silver-plated graphene and 10-micron silver powder are loaded into the ball mill at a weight ratio of 0.1:99.9, using alumina ball ink tanks and agate balls, and the ball-to-material ratio is 3:1. The...

Embodiment 2

[0027] (1) Silver-coated graphene is prepared by depositing metallic silver on the surface of graphene (1-10 layers) by DC magnetron sputtering. The silver target with a purity of 99.99% is polished with fine sandpaper before installation to remove the surface oxide film, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering to remove metal oxide on the target surface substances and other impurities to ensure the purity of the silver film deposited on the subsequent graphene surface. The sputtering parameters are as follows: the vacuum degree reaches 1.0*10 -3 At Pa, high-purity argon gas was introduced, the vacuum chamber pressure was 1.5Pa, the sputtering power was 80W, and the deposition time was 20min.

[0028] (2) Silver-plated graphene and 10-micron silver powder are loaded into the ball mill at a weight ratio of 0.5:99.5, using alumina ball ink tanks and agate balls, and the ball-to-material ratio is 3:1. The ba...

Embodiment 3

[0032] (1) Silver-coated graphene is prepared by depositing metallic silver on the surface of graphene (1-10 layers) by DC magnetron sputtering. The silver target with a purity of 99.99% is polished with fine sandpaper before installation to remove the surface oxide film, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering to remove metal oxide on the target surface substances and other impurities to ensure the purity of the silver film deposited on the subsequent graphene surface. The sputtering parameters are as follows: the vacuum degree reaches 0.3*10 -3 At Pa, high-purity argon gas was introduced, the vacuum chamber pressure was 1.0 Pa, the sputtering power was 110 W, and the deposition time was 5 min.

[0033] (2) Silver-plated graphene and 40-micron silver powder are loaded into the ball mill at a weight ratio of 5.0:95.0, using alumina ball ink tanks and agate balls, and the ball-to-material ratio is 3:1. The...

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Abstract

The invention relates to a silver-based electrical contact composite material and a preparation method therefor. The silver-based electrical contact composite material is prepared from 0.1-5.0% of silver plated graphene and 95.0-99.9% of silver in percentage by weight; and the silver-based electrical contact composite material is prepared by steps of graphene silver plating, ball milling and powder mixing, cold pressing molding, sintering and plastic processing and molding. According to the silver-based electrical contact composite material, the silver plated graphene is added to silver to be used as the skeleton so as to endow the material with high hardness, mechanical impact resistance and electric arc ablation resistance, and meanwhile, the reduction of electrical conductivity and thermal conductivity is avoided.

Description

technical field [0001] The invention relates to an electric contact material and a preparation method thereof, in particular to a silver-based electric contact composite material and a preparation method thereof. Background technique [0002] Silver / carbon electrical contact materials with excellent welding resistance and low contact resistance have been used in low and medium load relays and signal switches, but due to their low mechanical strength and low wear resistance And arc corrosion resistance limits its wider application. [0003] Chinese Patent Document No. 101763956A, publication (announcement) date 2010.06.30, discloses that silver / graphite materials are improved in hardness and wear resistance by adding cermets and rare earth elements. [0004] Chinese Patent Document No. 101707146A, published (announcement) date 2010.05.12, discloses that tungsten and silver particles are deposited by carbon materials (diamond, graphite, carbon), which solves the problem of po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/023H01H11/04C22C5/06C22C1/05C23C14/35C23C14/18
CPCC22C1/05C22C5/06C23C14/185C23C14/35H01H1/023H01H11/04
Inventor 冷金凤周国荣法源
Owner UNIV OF JINAN
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