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A kind of silver-copper oxide composite electrical contact material and its preparation method and application

An electrical contact material and copper oxide technology are applied in the field of silver copper oxide composite electrical contact materials and their preparation, which can solve the problems of poor silver tin oxide processing performance, unsatisfactory comprehensive performance, increased surface resistance and the like, and improve comprehensive performance. , shorten the oxidation time, and make up for the effect of increasing contact resistance

Active Publication Date: 2019-04-16
重庆鼎诚电子元件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, silver metal oxide electrical contact materials are widely used. Commonly used electrical contact materials include silver cadmium oxide, silver tin oxide, silver copper oxide, silver zinc oxide, etc., which are all oxides of silver and single metals, and their comprehensive properties are not Ideal, for example: although the comprehensive performance of silver cadmium oxide is better, and the manufacturing process is also very stable and mature, but the product contains cadmium oxide, which is harmful to the environment. silver copper oxide replaced
Silver copper oxide has good cold working performance, low and stable surface contact resistance, but its resistance to welding is poor; compared with silver copper oxide, silver tin oxide particles are easy to migrate to the working surface of the contact under high current working conditions Precipitation, which increases the surface resistance of the material and accelerates the temperature rise, and the processing performance of silver tin oxide is poor

Method used

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  • A kind of silver-copper oxide composite electrical contact material and its preparation method and application
  • A kind of silver-copper oxide composite electrical contact material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1, a silver-copper oxide composite electrical contact material, comprising the following components: copper oxide content 6%, tin oxide content 3.5%, indium oxide content 0.5%, tellurium oxide content 0.25%, oxide The antimony content is 0.25%, the balance is silver. Its preparation method is:

[0031] Step 1, weighing and smelting, calculating the required amount of silver, copper, tin, indium, bismuth and antimony according to the proportion of the silver-copper oxide composite electrical contact material to be prepared, and weighing for later use; then the weighed silver, Copper, tin, indium and additives are smelted into a melt in an intermediate frequency melting furnace;

[0032] Step 2, pulverizing by atomization, performing gas atomization pulverization on the smelted molten metal, and the particle size of the obtained powder is 150-200 mesh;

[0033] Step 3, pre-oxidation, pre-oxidize the powder obtained in step 2; first heat to 200°C, keep warm for 2...

Embodiment 2

[0039] Example 2, a silver-copper oxide composite electrical contact material, comprising the following components: the content of copper oxide is 6%, the content of tin oxide is 5%, the content of indium oxide is 0.2%, the content of bismuth oxide is 0.1%, and the content of oxide The antimony content is 0.1%, and the balance is silver. Its preparation method is:

[0040]Step 1, weighing and smelting, calculating the required amount of silver, copper, tin, indium, bismuth and antimony according to the proportion of the silver-copper oxide composite electrical contact material to be prepared, and weighing for later use; then the weighed silver, Copper, tin, indium and additives are smelted into a melt in an intermediate frequency melting furnace;

[0041] Step 2, atomization powder production, the smelted molten metal is subjected to gas atomization powder production, and the particle size of the obtained powder is 150-320 mesh;

[0042] Step 3, pre-oxidation, pre-oxidize th...

Embodiment 3

[0048] Example 3, a silver-copper oxide composite electrical contact material, comprising the following components: 6% copper oxide, 5.5% tin oxide, 0.2% indium oxide, 0.2% tellurium oxide, and The amount is silver. Its preparation method is:

[0049] Step 1, weighing and smelting, calculating the required amount of silver, copper, tin, indium, bismuth and antimony according to the proportion of the silver-copper oxide composite electrical contact material to be prepared, and weighing for later use; then the weighed silver, Copper, tin, indium and additives are smelted into a melt in an intermediate frequency melting furnace;

[0050] Step 2, atomization powder production, the smelted molten metal is subjected to gas atomization powder production, and the particle size of the obtained powder is 150-320 mesh;

[0051] Step 3, pre-oxidation, pre-oxidize the powder obtained in step 2; first heat to 200°C, keep it warm for 1h, then raise the temperature to 500°C, keep it warm fo...

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Abstract

The invention discloses a silver copper oxide composite electric contact material and a preparing method and application thereof. Components of the silver copper oxide composite electric contact material comprise, by weight percentage, 5%-7% of copper oxide, 3%-6% of tin oxide, 0.2%-1% of indium oxide, 0.05%-1% of an additive and the balance silver, wherein the additive is at least one of bismuth oxide, antimony oxide, nickel oxide and tellurium oxide. The preparing method of the material comprises the steps that all the alloy elements are weighed and smelted, are then subjected to atomizing and powdering, pre-oxidation, high-temperature oxidation, ball milling, high-pressure oxidation, isostatic pressing forming, sintering and extruding, and are then prepared into finished products. The prepared copper oxide composite electric contact material is low and stable in working surface resistance, has excellent comprehensive performance, and is good in processability and free of environmental pollution.

Description

technical field [0001] The invention relates to an electrical contact material and a preparation method thereof, in particular to a silver-copper oxide composite electrical contact material, a preparation method and application thereof. Background technique [0002] With the continuous development of electrical products, the requirements for electrical contact materials are increasing. It is required that the material does not undergo fusion welding under the conditions of extreme arc heat and Joule heat, and has good mechanical and electrical wear resistance. Under a large current environment, it has good resistance to fusion welding, less material transfer, and low and stable contact resistance. [0003] At present, silver metal oxide electrical contact materials are widely used. Commonly used electrical contact materials include silver cadmium oxide, silver tin oxide, silver copper oxide, silver zinc oxide, etc., which are all oxides of silver and single metals, and their...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05
CPCC22C1/05C22C5/06C22C32/001
Inventor 冷平
Owner 重庆鼎诚电子元件有限公司
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