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Method for preparing Ag-ZnO-doped electrical contact material

An electrical contact material, silver zinc oxide technology, applied in circuits, electrical switches, electrical components, etc., can solve problems such as rising contact resistance

Active Publication Date: 2011-10-05
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZnO particles will exist stably during use, and with the splashing of Ag metal, more and more ZnO will accumulate on the contact surface, which will increase the contact resistance

Method used

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  • Method for preparing Ag-ZnO-doped electrical contact material
  • Method for preparing Ag-ZnO-doped electrical contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. According to ZnO: Co 2 o 3 : Nb 2 o 5 (Molar ratio)=97.5:2.5:0.075 take the corresponding ZnO, Co 2 o 3 , Nb 2 o 5 Put it in a ball mill for 48 hours, then calcinate in air at 800°C for 1 hour, and then ball mill for 48 hours to obtain mixed powder A, wherein the ball milling speed is 50 rpm.

[0034] 2. According to ZnO: Co 2 o 3 : Nb 2 o 5 :Ti(OC 4 h 9 ) 4 (Molar ratio)=97.5: 2.5: 0.075: 0.05 Take a corresponding amount of tetrabutyl titanate and dissolve it in the mixed solution of glacial acetic acid and ethylene glycol ether, wherein glacial acetic acid: ethylene glycol ether (mass ratio)=1:2 ; Tetrabutyl titanate: (glacial acetic acid + ethylene glycol ethyl ether) (mass ratio) = 1:1, heated and stirred at 50-60°C until uniform and transparent, and obtained solution B.

[0035] 3. According to ZnO: Co 2 o 3 : Nb 2 o 5 : Y(NO 3 ) 3 =97.5:2.5:0.075:0.05 Dissolve the corresponding amount of yttrium nitrate in deionized water, add ethylene glyco...

Embodiment 2

[0047] 1. According to ZnO: Co 2 o 3 : Nb 2 o 5 (Molar ratio)=97.5:2.5:0.075 take the corresponding ZnO, Co 2 o 3 , Nb 2 o 5 Place it in a ball mill for 48 hours, then calcinate in air at 800°C for 1 hour, and then ball mill for 48 hours to obtain mixed powder A, wherein the ball milling speed is 200 rpm.

[0048] 2. According to ZnO: Co 2 o 3 : Nb 2 o 5 :Ti(OC 4 h 9 ) 4 (Molar ratio) = 97.5: 2.5: 0.075: 0.05 Take a corresponding amount of tetrabutyl titanate and dissolve it in the mixed solution of glacial acetic acid and ethylene glycol ether, wherein glacial acetic acid: ethylene glycol ether (mass ratio) = 2: 1 ; Tetrabutyl titanate: (glacial acetic acid + ethylene glycol ethyl ether) (mass ratio) = 1: 5, heated and stirred between 50-60 ° C until uniform and transparent, to obtain solution B.

[0049] 3. According to ZnO: Co 2 o 3 : Nb 2 o 5 : Y(NO 3 ) 3 =97.5:2.5:0.075:0.05 Dissolve the corresponding amount of yttrium nitrate in deionized water, add e...

Embodiment 3

[0061] 1. According to ZnO: Co 2 o 3 : Nb 2 o 5 (Molar ratio)=97.5:2.5:0.075 take the corresponding ZnO, Co 2 o 3 , Nb 2 o 5 Put it in a ball mill for 48 hours, then calcinate in air at 800°C for 1 hour, and then ball mill for 48 hours to obtain mixed powder A, wherein the ball milling speed is 150 rpm.

[0062] 2. According to ZnO: Co 2 o 3 : Nb 2 o 5 :Ti(OC 4 h 9 ) 4 (Molar ratio)=97.5: 2.5: 0.075: 0.05 Take a corresponding amount of tetrabutyl titanate and dissolve it in the mixed solution of glacial acetic acid and ethylene glycol ether, wherein glacial acetic acid: ethylene glycol ether (mass ratio)=1: 1 ; Tetrabutyl titanate: (glacial acetic acid + ethylene glycol ethyl ether) (mass ratio) = 1: 3, heated and stirred between 50-60 ° C until uniform and transparent, to obtain solution B.

[0063] 3. According to ZnO: Co 2 o 3 : Nb 2 o 5 : Y(NO 3 ) 3 =97.5:2.5:0.075:0.05 Dissolve the corresponding amount of yttrium nitrate in deionized water, add ethylen...

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Abstract

The invention discloses a method for preparing an Ag-ZnO-doped electrical contact material, comprising the following steps: obtaining modified ZnO particles by adopting a sol-gel method, improving the electrical conductivity of the ZnO particles and then preparing a dispersed composite material with compact distribution from modified ZnO used as raw material and Ag powder by the process flow of ball milling, pressing, sintering, hot extrusion and the like. Since the electrical conductivity of the ZnO particles is improved, the problems of contact resistance and overhigh temperature rise of the material in the use process are solved, thereby widening the use range of the Ag-ZnO material and improving the electrical contact performance of the material.

Description

technical field [0001] The present invention relates to a method for preparing an electrical contact material, in particular to a method for preparing an electrical contact material doped with silver zinc oxide. The silver contacts prepared from this alloy material include those used in various relays, Electrical contacts used in contactor switches and bimetallic composite rivet electrical contacts, sheets, etc. Background technique [0002] With the development of electrical products in the direction of large capacity and small volume, the requirements for electrical contact materials are increasing --- the materials are required not to undergo welding, mechanical and electrical wear resistance under conditions of extreme arc heat and Joule heat It is good; less metal spatter is generated during the breaking process, and the arcing time is short; in a DC environment, it has good welding resistance, less material transfer, and low and stable contact resistance. [0003] Alt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05H01H11/04B22F3/16
Inventor 甘可可陈乐生祁更新陈晓
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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