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Method for adding carbon substance in the preparation of electric contact material

A technology of electrical contact materials and carbon, which is applied in the field of adding carbon materials in the preparation of electrical contact materials, can solve the problems of prolonging ball milling time, affecting material performance, pollution, etc., to avoid uneven particle agglomeration and improve comprehensive performance , The effect of simple process operation

Active Publication Date: 2010-02-24
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This way of adding will cause the following adverse effects: 1. Due to the huge surface area of ​​the nano-powder material, it is easy to agglomerate, and it is difficult to disperse evenly under the ball milling method, which is easy to cause aggregation, thereby reducing the effect of nano-carbon materials; To disperse the raw material as evenly as possible, it is necessary to prolong the ball milling time and increase the milling strength. High-energy ball milling will inevitably cause the ball milling medium to pollute the electrical contact materials, thereby affecting the material properties.

Method used

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  • Method for adding carbon substance in the preparation of electric contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 100g of silver tungsten carbide graphite (Ag: 84wt%, graphite: 2.5wt%, WC: 13.5wt%) electrical contact material as an example.

[0026] The first step is to calculate the amount of biomass-derived carbonaceous mesophase and ethanol required. According to the ratio of 40:1, the biomass-derived carbonaceous mesophase needs 100g×2.5%×40=100g, and the biomass-derived carbonaceous mesophase and The ratio of ethanol is 1:20: that is, 100g×20=2000g ethanol.

[0027] In the second step, the above-mentioned biomass-derived carbonaceous mesophase was dissolved in ethanol, stirred and dissolved for 15 minutes, and then the dissolved product and impurities were filtered to obtain solution A. The mesh number of the filter cloth is 100 mesh.

[0028] In the third step, the remaining 84g of Ag powder and 13.5g of WC powder were uniformly mixed to obtain mixed powder B. Add powder B into solution A and stir while heating until the ethanol evaporates completely and the temperatur...

Embodiment 2

[0031] Take 100g of silver graphite (Ag-96wt%, graphite-4wt%) electrical contact material as an example.

[0032] The first step is to calculate the amount of biomass-derived carbonaceous mesophase and ethanol required. According to the ratio of 40:1, the biomass-derived carbonaceous mesophase needs 100g×4%×40=160g, and the biomass-derived carbonaceous mesophase and ethanol Take the ratio of 1:10: 160g×10=1600g.

[0033] In the second step, the above-mentioned biomass-derived carbonaceous mesophase was dissolved in ethanol, stirred and dissolved for 60 minutes, and then the dissolved product and impurities were filtered to obtain solution A. The mesh number of the filter cloth is 200 mesh.

[0034] In the third step, add the remaining 96g of Ag powder (since the remaining component is a single component, that is, no mixing is required) into the solution A and stir, while heating until the ethanol is completely volatilized, and the temperature is 100°C.

[0035] In the fourth...

Embodiment 3

[0037] Take 100g copper tungsten carbide graphite (Cu-84wt%, graphite-2.5wt%, WC-13.5wt%) electrical contact material as an example.

[0038] The first step is to calculate the amount of biomass-derived carbonaceous mesophase and ethanol required. According to the ratio of 40:1, the biomass-derived carbonaceous mesophase needs 100g×2.5%×40=100g, and the biomass-derived carbonaceous mesophase and The ratio of ethanol is 1:5: that is, 100g×5=500g ethanol.

[0039] In the second step, the above-mentioned biomass-derived carbonaceous mesophase was dissolved in ethanol, stirred and dissolved for 30 minutes, and then the dissolved product and impurities were filtered to obtain solution A. The mesh number of the filter cloth is 300 mesh.

[0040] In the third step, the remaining Cu powder 84g and WC powder 13.5g were uniformly mixed to obtain mixed powder B. Add the powder B into the solution A and stir, while heating until the ethanol volatilizes completely, and the heating temper...

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Abstract

The invention relates to a method for adding carbon substance in the preparation of electric contact material in the material technical field. The invention adopts a biomass derivative carbonaceous intermediate phase as material and uses the ethanol solution for dipping the metallic powder. After drying powder, the organic matters on the metallic powder surface form submicron or nanometer carbon particles in a heat treatment way, thus realizing the pollution-free uniform dispersion addition. The solution addition type brings easy operation and no external pollution. The submicron or nanometercarbon particles are uniformly dispersed in the electric contact material matrix so as to improve the comprehensive properties of the electric contact material. And the carbon substance is rich and cheap.

Description

technical field [0001] The invention relates to a method for adding carbonaceous substances in the technical field of materials, in particular to a method for adding carbonaceous substances in the preparation of electrical contact materials. Background technique [0002] Since carbonaceous substances (graphite or diamond) have the advantages of high melting point, wear resistance and friction reduction, stable chemical properties, etc., carbonaceous substances are widely used in the field of material preparation. For example, adding graphite to the electrical contact material can greatly improve the anti-welding performance of the material during use; in the preparation of wear-resistant and anti-friction materials for the mechanical industry, adding graphite can improve the anti-friction performance of the material, while adding diamond The wear resistance of the material can be improved, so as to achieve the purpose of prolonging the service life. At the same time, the pa...

Claims

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Application Information

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IPC IPC(8): C22C1/05
Inventor 陈乐生甘可可祁更新陈晓
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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