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Silver-based electric contact material and preparation method thereof

An electrical contact material, silver-based technology, applied in contacts, circuits, electrical switches, etc., can solve the problems of easy aggregation of carbon nanotubes and affecting the hardness of electrical contact materials, etc., achieve good electrical conductivity, low production cost, and short process Effect

Inactive Publication Date: 2021-05-28
SICHUAN AIERFATAIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the amount of carbon nanotubes added is large, the carbon nanotubes are easy to agglomerate during the preparation process, which directly affects the hardness of the prepared electrical contact material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of silver-based electrical contact material is carried out according to the following steps:

[0034] a. Preparation of CuO-loaded carbon nanotubes: CuCl 2 , carbon nanotubes and water, heated to 85-100°C, stirred for 0.5-1h, then added sodium hydroxide solution, after the reaction was complete, separated the mixed solution from solid to liquid, and dried the solid; put the obtained solid in 300-400°C, holding time 1.5-5h, to obtain CuO-loaded carbon nanotubes;

[0035] b. Mix the CuO-loaded carbon nanotubes and Ag, and ball mill for 1-3 hours to obtain a powder;

[0036] c. The above-mentioned powder is subjected to vacuum hot pressing sintering, wherein the vacuum degree in the furnace during the whole sintering process is lower than 1×10 -2 Pa.

[0037] For the CuO-loaded carbon nanotubes prepared by the preparation method of the present invention, even in the subsequent ball milling process, the CuO is not easy to fall off, and the performa...

Embodiment

[0042] The preparation of embodiment silver-based electrical contact material

[0043] Follow these steps:

[0044] a. Preparation of CuO-loaded carbon nanotubes: 1.35g CuCl 2 , 9.2g of carbon nanotubes and water mixed, heated to 85 ° C, stirred for 0.5h, and then added sodium hydroxide solution to make Cu 2+ After the reaction is complete, filter the mixed solution, wash the precipitate until the washing water is neutral, and dry the solid; place the obtained solid at 350° C. for 5 hours to obtain CuO-loaded carbon nanotubes;

[0045] b. Mix the CuO-loaded carbon nanotubes and Ag in a weight ratio of 3:97, and ball mill for 3 hours to obtain a powder;

[0046] c. Carry out vacuum hot pressing sintering of the above powder, the sintering temperature is 550°C, and the sintering time is 1h, wherein the vacuum degree in the furnace during the whole sintering process is lower than 1×10 -2 Pa, the electrical contact material 1 was obtained.

[0047] Preparation of comparative s...

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PUM

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Abstract

The invention relates to a silver-based electric contact material and a preparation method thereof, and belongs to the field of silver-based electric contact material preparation. The silver-based electric contact material is prepared from, by weight, 1-7% of CuO-loaded carbon nanotubes and the balance of Ag. On the CuO-loaded carbon nanotubes, the mass fraction of CuO is 5-10%. The prepared silver-based electric contact material is high in hardness, good in conductivity and good in arc corrosion resistance.

Description

technical field [0001] The invention relates to a silver-based electrical contact material and a preparation method thereof, and belongs to the field of preparation of silver-based electrical contact materials. Background technique [0002] Electrical contact elements are the core components of high and low voltage switching appliances, responsible for electrical connection, segmentation, diversion, isolation, etc., and their performance directly affects the overall reliability, stability, accuracy and service life of electrical and electronic conduction work . The electrical contact element is mainly made of electrical contact material, which is the key factor affecting the reliability of the switch electrical contact system. Wear, low and stable contact resistance, no chemical change with the medium used, certain strength and easy machining. [0003] Silver / graphite composite material has low contact resistance and good welding resistance, and is a traditional electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05H01H1/0237H01H1/027H01H11/04
CPCC22C5/06C22C26/00C22C1/05H01H1/0237H01H1/027H01H11/04C22C2026/002
Inventor 陈海军张林王宁张勇全
Owner SICHUAN AIERFATAIKE TECH CO LTD
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