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Preparation method of copper-based electrical contact material

A technology of contact material and electric contact, applied in the direction of contacts, circuits, electric switches, etc., can solve the problems of reduced reliability and service life of contact materials, increase of contact resistance and low resistivity of contact elements, etc. Achieve the effects of avoiding contact resistance reduction, improving anti-welding resistance, and improving electrical properties

Inactive Publication Date: 2016-07-27
SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the copper contact material is easily oxidized, copper oxide and cuprous oxide with low resistivity are produced, which increases the contact resistance of the contact element and makes it easy to heat up during use, resulting in the reliability of the contact material. and reduced service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The copper-based electrical contact material in this embodiment includes copper, tin oxide, dysprosium oxide and lanthanum oxide, wherein the content of tin element is 5wt%, the content of dysprosium element is 0.2wt%, and the content of lanthanum element is The content is 0.5wt%, and unavoidable impurities, and the balance elements are copper and oxygen.

[0020] Preparation of Nano SnO by Sol-Gel Method 2 Powder: SnCl 4 ·5H 2 O and TiCl 4 Add polyethylene glycol (PEG) dispersant to the aqueous alcohol solution, stir at a constant temperature, and add ammonia water dropwise to pH 6.9-7.2 at the same time, and obtain a gel after aging, washing, drying, and grinding, in which SnCl 4 ·5H 2 O and TiCl 4 The mass ratio of the alcohol is 8.5:1, and the volume ratio of alcohol to water in the alcohol aqueous solution is 2:1.

[0021] The raw materials for preparing the alloy are copper, dysprosium and lanthanum, wherein the weight of dysprosium and lanthanum is prepared...

Embodiment 2

[0026] The copper-based electrical contact material in this embodiment includes copper, tin oxide, dysprosium oxide and lanthanum oxide, wherein the content of tin element is 10wt%, the content of dysprosium element is 5wt%, and the content of lanthanum element is 1wt%, and unavoidable impurities, and the balance elements are copper and oxygen.

[0027] Preparation of Nano SnO by Sol-Gel Method 2 Powder: SnCl 4 ·5H 2 O and TiCl 4 Add polyethylene glycol (PEG) dispersant to the aqueous alcohol solution, stir at a constant temperature, and add ammonia water dropwise to pH 6.9-7.2 at the same time, and obtain a gel after aging, washing, drying, and grinding, in which SnCl 4 ·5H 2 O and TiCl 4 The mass ratio of the alcohol is 9:1, and the volume ratio of alcohol to water in the aqueous alcohol solution is 2:1.

[0028] The raw materials for preparing the alloy are copper, dysprosium and lanthanum, wherein the weight of dysprosium and lanthanum is prepared according to the co...

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Abstract

The invention discloses a preparation method of a copper-based electrical contact material. The copper-based electrical contact material comprises oxides of copper and tin, an oxide of dysprosium and an oxide of lanthanum, and is prepared from the following components in percentage by weight: 5-10wt% of a tin element, 0.2-0.5wt% of a dysprosium element, 0.5-1wt% of a lanthanum element and inevitable impurities and the balance of copper and oxygen elements. According to the prepared copper-based electrical contact material, through optimized selection of the proportions of raw materials and the technology, the structure uniformity of the material is improved; the electrical property of the material is improved; and particularly, the hardness and the wear-resisting property of the material are improved by doping rare-earth elements. SnO2 powder is prepared by a sol-gel method; and distribution of nano SnO2 in a copper matrix is uniformly dispersed, so that contact resistance reduction caused by an insulating layer formed by SnO2 enrichment can be avoided; the split action of the oxides on the matrix is reduced; the processability of the copper-based electrical contact material can be effectively improved; and the fusion welding resistance and the electrical arc erosion resistance are improved.

Description

technical field [0001] The invention relates to the field of electric equipment manufacturing, in particular to a method for preparing a copper-based electrical contact material. Background technique [0002] Electrical contact elements are contact elements of electrical switches, instruments and meters, etc., and are widely used in electric power and telecommunication systems, that is, home appliance control and other equipment. Copper-based electrical contact materials have developed rapidly due to their low contact resistance, strong resistance to welding, good wear resistance, and strong electrical erosion resistance. Among them, silver tin oxide electrical contact materials have developed rapidly in the past 10 years. A new environment-friendly electrical contact material that can replace the toxic silver cadmium oxide. It has good thermal stability, arc corrosion resistance and welding resistance, long service life and wide current range, so it can ensure the reliabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/025H01H11/04
CPCH01H1/025H01H11/048
Inventor 不公告发明人
Owner SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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