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Method for preparing superfine AgSnO2 doped electrical contact material by high energy ball milling method

A high-energy ball milling technology for electrical contact materials, applied in the field of composite material preparation, can solve problems affecting the service life of contact materials, nanoparticle agglomeration, and strict process requirements, so as to shorten ball milling time, refine grains, and reduce costs Effect

Inactive Publication Date: 2013-09-04
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation of silver oxide powder by high-purity metal atomization and oxidation technology is a relatively common method, but this method has the disadvantages of high silver content, high cost, and strict requirements on the process, and it is easy to cause nanoparticles at high temperatures. Agglomeration affects the service life of contact materials and is difficult for industrial application
[0004] According to data statistics, there is no method involving the use of silver powder simultaneously doped with oxides such as tin oxide, cadmium oxide, lanthanum oxide and copper oxide to prepare electrical contact materials; in addition, the existing public nano-SnO 2 All the preparation technologies have the disadvantages of complex preparation process, high cost and difficulty in industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Weigh SnO according to the mass ratio of 5:2.8:2.8:1.4 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder; SnO to be weighed 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder are mixed together to form a mixed powder; the stainless steel grinding ball and the mixed powder are mixed at a ball-to-material ratio of 10:1, and then put into the ball mill tank together, and added per gram of the mixed powder 2ml of alcohol is ball milled and taken out after ball milling for 2 hours. The mill is stopped for 30 minutes to cool down. After cooling to normal temperature, the ball mill is turned on again. After the ball milling is completed, the mixed oxide suspension after ball milling is poured into a container;

[0066] Weigh silver powder A and silver powder B according to a mass ratio of 9:1. The particle size of silver powder A is 75μm, and the particle size of silver powder B is 48μm; mix silver powder A and silv...

Embodiment 2

[0073] Weigh SnO according to the mass ratio of 6:2.6:3:1.7 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder; SnO to be weighed 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder are mixed together to form a mixed powder; the stainless steel grinding ball and the mixed powder are mixed at a ball-to-battery ratio of 7:1, and then put into the ball mill tank together, and added per gram of the mixed powder 2.5ml of alcohol is ball milled and taken out after 2.5 hours of ball milling. The mill is stopped for 25 minutes to cool down every 25 minutes of ball milling. After cooling to normal temperature, the ball mill is turned on again. After the ball milling is completed, the mixed oxide suspension after ball milling is poured into a container;

[0074] Weigh silver powder A and silver powder B at a mass ratio of 8:1. The particle size of silver powder A is 75μm, and the particle size of silver powder B is 48μm. Mix si...

Embodiment 3

[0081] Weigh SnO according to the mass ratio of 7:2.9:2.6:1.8 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder; SnO to be weighed 2 Tin dioxide, La 2 O 3 Lanthanum oxide, CuO copper oxide, CdO cadmium oxide powder are mixed together to form a mixed powder; the stainless steel grinding ball and the mixed powder are mixed at a ball-to-battery ratio of 7.5:1, and then put into the ball mill tank together, and added per gram of the mixed powder 3ml of alcohol is ball milled and taken out after ball milling for 3 hours. The mill is stopped for 35 minutes to cool down. After cooling to room temperature, the ball mill is turned on again. After the ball milling is completed, the mixed oxide suspension after ball milling is poured into a container;

[0082] Weigh silver powder A and silver powder B at a mass ratio of 7:1. The particle size of silver powder A is 75μm, and the particle size of silver powder B is 48μm; mix silver powder A and silver powder B ...

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Abstract

The invention discloses a method for preparing a superfine AgSnO2 doped electrical contact material by a high energy ball milling method. The method comprises the following specific steps: (1), a superfine SnO2, La2O3, CuO and CdO mixed oxide suspension is prepared with a high energy ball milling wet mixing method; (2), two types of silver powder with different particle sizes are mixed, and added to the superfine SnO2, La2O3, CuO and CdO mixed oxide suspension; (3), the mixed silver power and superfine mixed oxide power are subjected to ball milling treatment to form AgSnO2 composite powder; (4), the AgSnO2 composite powder is subjected to annealing treatment; (5), the annealed AgSnO2 composite is moulded and sintered; and (6), the superfine AgSnO2 doped electrical contact material is obtained. According to the method, oxide and the silver powder are mixed uniformly before high energy ball milling, and subjected to the high energy ball milling and subsequent processing, and then the contact material with superfine oxide dispersedly distributed in a silver substrate can be prepared.

Description

Technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a high-energy ball milling method for preparing ultrafine doped AgSnO 2 Method of electrical contact material. technical background [0002] Currently, the well-known AgSnO 2 There are many technologies for electrical contact materials. In preparation of AgSnO 2 For the contact material, different additives can be used, and different preparation methods can be used according to different additives. [0003] Using high-purity metal atomization and oxidation technology to prepare silver oxide powder is a relatively common method, but this method has the disadvantages of high silver content, high cost, and strict process requirements, and it is easy to cause nanoparticles at high temperatures. Agglomeration affects the service life of the contact material and is difficult for industrial application. [0004] According to statistics, there is currently no m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C1/10C22C1/05B22F1/00
Inventor 王俊勃杨增超刘松涛杨敏鸽付翀贺辛亥姜凤阳齐海虎
Owner XI'AN POLYTECHNIC UNIVERSITY
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