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Copper-based electrical contact material for low-voltage electrical appliances and preparation method thereof

A technology of electrical contact material and low-voltage electrical appliances, which is applied to contacts, circuits, electrical switches, etc., can solve the problems of low electrical conductivity, high contact resistance, poor oxidation resistance and arc burning resistance, and improve electrical conductivity. , strong enhancement effect, highlight the substantive effect

Inactive Publication Date: 2018-10-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a copper-based electrical contact material for low-voltage electrical appliances and its preparation method. The material is composed of the following components in mass percentage: Ce 0.05-0.5%, TiO 2 doped SnO 2 Nanoparticles 0.1~1.0%, the rest is Cu; of which TiO 2 doped SnO 2 Nanoparticles are the main reinforcing phase, and the rare earth element Ce is added at the same time to improve the mechanical, oxidation resistance and electrical contact properties. When Cu-based composite materials are used as contact materials, they have the disadvantages of low electrical conductivity, high contact resistance, poor resistance to oxidation and arc burning, and insufficient dispersion of the reinforcing phase.

Method used

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  • Copper-based electrical contact material for low-voltage electrical appliances and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step, the preparation of raw material mixed powder:

[0024] Weigh 150-mesh electrolytic Cu powder, 150-mesh pure Cu-20Ce alloy powder and TiO with an average particle size of 10nm as required 2 doped SnO 2 Nanopowder carries out batching, makes Ce element account for 0.05% (mass percentage) of above-mentioned three kinds of raw material gross weights, TiO 2 doped SnO 2 Nano-powder accounts for 0.1% (mass percentage) of above-mentioned three kinds of raw material gross weights, and all the other are Cu, then mixed powder is placed in the stainless steel ball mill tank, after filling with absolute ethanol, seal, ball mill on planetary ball mill for 5 hours, ball mill The ball-to-material ratio used in the method is 10:1, and the rotating speed of the ball mill is 300 rpm. After that, the mixed powder is taken out and placed on the filter paper to stand for 3 minutes, and the preparation of the raw material mixed powder is completed and set aside;

[0025] Th...

Embodiment 2

[0029] The first step, the preparation of raw material mixed powder:

[0030] Weigh 200-mesh electrolytic Cu powder, 200-mesh pure Cu-20Ce alloy powder and TiO with an average particle size of 15nm as required 2 doped SnO 2 Nanopowder carries out batching, makes Ce element account for 0.05% (mass percentage) of above-mentioned three kinds of raw material gross weights, TiO 2 doped SnO 2 Nano-powder accounts for 0.3% (mass percentage) of above-mentioned two kinds of raw material gross weights, and all the other are Cu, then mixed powder is placed in the stainless steel ball mill tank, after filling with dehydrated alcohol, seal, ball mill on planetary ball mill for 6 hours, ball mill The ball-to-material ratio used in the method is 10:1, and the rotating speed of the ball mill is 300 rpm. After that, the mixed powder is taken out and placed on filter paper to stand for 4 minutes to complete the preparation of the raw material mixed powder. Stand-by, the adopted Cu -20Ce allo...

Embodiment 3

[0036] Except that 200-mesh pure Cu-20Ce alloy powder is added in the first step, so that Ce accounts for 0.08% (mass percentage) of the total weight of the three raw materials, the others are the same as in Example 2.

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Abstract

The invention discloses a copper-based electrical contact material used for a low-voltage electric appliance and a preparation method for the copper-based electrical contact material, and relates to a contact by taking copper as a substrate material. The copper-based electrical contact material is prepared from the following components based on mass percentage: 0.05-0.5% of Ce, 0.1-1.0% of TiO<2>-doped SnO<2> nanoparticles and the balance of Cu, wherein the TiO<2>-doped SnO<2> nanoparticles are taken as a main reinforcing phase, and meanwhile, the rare element Ce is added, so that mechanical performance, antioxidant performance and electrical contact performance are reinforced; and the material is prepared by processes of wet grinding of mixed powder and powder metallurgy under protection of absolute ethyl alcohol, so that the shortcomings of low electrical conductivity, high contact resistance, poor antioxidant performance and arc burning loss resistance and insufficient dispersion distribution degree of the reinforcing phase of a Cu-based composite material used as the contact material and prepared in the prior art can be overcome.

Description

technical field [0001] The technical scheme of the invention relates to a contact with copper as a base material, in particular to a copper-based electrical contact material for low-voltage electrical appliances and a preparation method thereof. Background technique [0002] Electric contacts are contact elements of electrical switches, instruments and meters, etc., and are mainly responsible for connecting and disconnecting circuits and load currents. The performance of electrical contact materials will directly affect the reliability and service life of electrical switches, instruments and meters. At present, although there are hundreds of kinds of low-voltage electrical contact materials, they can basically be classified into five series: Ag-CdO, Ag-Ni, Ag-W, Ag-SnO 2 And Ag-C, that is, mainly based on Ag. With the development of modern industry, the demand for low-voltage electrical appliances has increased rapidly, and the annual Ag consumption of electrical contact p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/025H01H11/04
CPCH01H1/025H01H11/048
Inventor 陆东梅王以春丁燕军焦志娴王清周杨瑞霞
Owner HEBEI UNIV OF TECH
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