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A kind of preparation technology of silver tin oxide composite material

A composite material, silver tin oxide technology, which is applied in the field of metal matrix composite material manufacturing, can solve the problems of uneven silver tin oxide structure and insufficient oxide content, and achieve strong designability of volume fraction, high material performance and simple process Effect

Active Publication Date: 2019-10-25
深圳市翠绿贵金属材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the oxide content in the tin oxide material prepared by the existing preparation method is generally not high enough, and the structure of the silver tin oxide is not uniform enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A kind of preparation technology of silver tin oxide composite material of the present invention, this technology comprises the steps:

[0023] Step S1: taking materials by volume percentage, taking tin oxide reinforcement particles, silver particles and matrix silver, wherein the sum of the volume percentages of tin oxide reinforcement particles, silver particles and matrix silver is 100%;

[0024] Step S2: Mix the tin oxide reinforcement particles and silver particles in step S1 by a mechanical dry method to obtain a mixed reinforcement powder for later use;

[0025] Step S3: placing the mixed reinforcement powder in step S2 in a mold and pressing it into a prefabricated block;

[0026] Step S4: heating the mold containing the mixed reinforcement powder prefabricated block in step S3 at a high temperature;

[0027] Step S5: heating the matrix silver in step S1 at a high temperature to obtain liquid silver melt, casting the liquid silver melt into the mold in step S4,...

Embodiment 1

[0032] In step S1, materials are obtained by volume percentage, including tin oxide reinforcement particles with a volume percentage of 3%, silver particles with a volume percentage of 20%, and matrix silver with a volume percentage of 77%.

Embodiment 2

[0034] In step S1, materials are obtained according to volume percentage, 10% by volume of tin oxide reinforcement particles, 30% by volume of silver particles, and 60% by volume of matrix silver.

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PUM

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Abstract

The present invention relates to the field of metal matrix composite material manufacturing, in particular to a preparation process of silver tin oxide composite material. The process includes the following main steps: step S5: heating the matrix silver in step S1 at high temperature to obtain liquid silver melt, and The liquid silver melt is poured into the mold in step S4, so that the liquid silver melt and the mixed reinforcement powder prefabricated block are fully mixed; Step S6: the mold containing the liquid silver melt and the mixed reinforced powder prefabricated block in step S5 Apply pressure so that the liquid silver melt fully penetrates into the pores between the particles of the mixed reinforcement powder prefabricated block, and continue to maintain the pressure after the liquid silver melt fully penetrates into the pores between the particles of the mixed reinforcement powder prefabricated block. Compared with the prior art, the preparation process of the silver-tin oxide composite material of the present invention is simple, the cost is low, the obtained material has high density, high material performance and stable quality.

Description

【Technical field】 [0001] The invention relates to the field of manufacturing metal matrix composite materials, in particular to a preparation process of a silver-tin oxide composite material. 【Background technique】 [0002] Silver tin oxide is a common contact material in low-voltage electrical appliances when electrically contacting alloys. It is widely used in various relays and circuit breakers. It is a non-toxic, harmless and environmentally friendly electrical contact material that has developed rapidly this year. As a reinforcing phase of metal matrix composites, the size, shape, wettability of tin oxide with metallic silver and distribution state in the silver matrix have great influence on the properties of the composites. [0003] At present, the generally recognized preparation methods of silver tin oxide materials mainly include the following types: [0004] 1. Through intermediate frequency melting and casting of silver, tin and indium blocks, surface treatment,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C5/06C22C32/00
CPCC22C1/1036C22C5/06C22C32/0021C22C1/1073
Inventor 田首夫金鹏卢卓张龙宝
Owner 深圳市翠绿贵金属材料科技有限公司