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Superplastic Ag/SnO2 alloy material and preparation method thereof

An alloy material and superplastic technology, applied in the field of alloy material preparation, can solve the problems of poor processing performance, inability to meet low-cost manufacturing technology, low electrical conductivity, etc., and achieve the effect of high tensile strength

Active Publication Date: 2018-07-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are still some deficiencies in the above-mentioned technologies. For the silver tin oxide electrical contact materials under the condition of low silver content ratio (≤88wt.%), there are still poor processability and low conductivity, which cannot meet the further improvement of low-cost manufacturing technology.

Method used

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  • Superplastic Ag/SnO2 alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of superplastic alloy modified tin oxide composite particles

[0029] Weigh the superplastic alloy TiAl powder and tin oxide powder according to the mass ratio of 0.2:11.8; then introduce the weighed powder into the alumina tank cavity of the ball mill, and add the zirconia grinding medium according to the ball-to-material ratio of 3:1 , and add PEG2000 as a surface activation modifier, and its addition amount is based on 2wt.% of the total amount of materials in the grinding tank. Ball milled for 24 hours under the condition of ball milling speed 200rmp. After the ball milling reaction is complete, the reaction product is washed with alcohol and dried at 80°C. Subsequently, low-temperature sintering treatment was used to remove residual surface activation modifiers and other impurities, wherein the sintering temperature was 200° C., and the sintering time was 8 hours; uniformly dispersed superplastic alloy modified tin oxide composite particles were ob...

Embodiment 2

[0035] (1) Preparation of superplastic alloy modified tin oxide composite particles

[0036] Weigh the superplastic alloy Nb according to the mass ratio of 5:7 3 Al powder and tin oxide powder; then import the weighed powder into the alumina tank cavity of the ball mill, add zirconia grinding media according to the ball-to-material ratio of 10:1, and add sodium stearate as a surface activation modification Active agent, its addition is based on the 2wt.% of the total amount of material in the grinding tank. Ball milled for 8 hours under the condition of ball milling speed 600rmp. After the ball milling reaction is complete, the reaction product is washed with alcohol and dried at 80°C. Subsequently, low-temperature sintering treatment was used to remove residual surface activation modifiers and other impurities, wherein the sintering temperature was 400° C. and the sintering time was 3 hours; uniformly dispersed superplastic alloy modified tin oxide composite particles were ...

Embodiment 3

[0042] (1) Preparation of superplastic alloy modified tin oxide composite particles

[0043] Weigh the superplastic alloy Y-PSZ powder and tin oxide powder according to the mass ratio of 2:10; then import the weighed powder into the alumina tank cavity of the ball mill, and add zirconia according to the ball-to-material ratio of 6:1 Grinding media, and adding sodium dodecylbenzenesulfonate as a surface active modifier, the amount of which is based on 2wt.% of the total amount of materials in the grinding tank. Ball milled for 10 hours under the condition of ball milling speed 400rmp. After the ball milling reaction is complete, the reaction product is washed with alcohol and dried at 80°C. Subsequently, low-temperature sintering treatment was used to remove residual surface activation modifiers and other impurities, wherein the sintering temperature was 300° C., and the sintering time was 5 hours; uniformly dispersed superplastic alloy modified tin oxide composite particles w...

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Abstract

The invention relates to alloy material preparation technologies and aims at providing a superplastic Ag / SnO2 alloy material and a preparation method of the superplastic Ag / SnO2 alloy material. The alloy material is composed of a superplastic alloy, tin oxide and Ag, wherein the mass ratio of the superplastic alloy to the tin oxide is (5-0.2):(7-11.8), and the mass ratio of the sum of the superplastic alloy and the tin oxide to the Ag is 12:88. The superplastic alloy refers to any of a TiAl superplastic alloy, an Nb3Al superplastic alloy or a Y-PSZ superplastic alloy. The superplastic Ag / SnO2alloy material has uniform distribution in the organizational structure and displays the higher tensile strength and the higher elongation after break during the rotary-forging-drawing process, and the plastic processing performance can be remarkably improved. By using the preferred superplastic alloy material as the modified component, a modified component can form a uniform coating layer on thesurfaces of tin oxide particles by adopting a high-energy ball milling technology, so that the modified tin oxide composite particles with uniform coating are obtained, and the modified tin oxide composite particles have the beneficial effects of being better in sphericity, uniform in structure and the like.

Description

technical field [0001] The invention belongs to the preparation technology of alloy materials, specifically a method of processing superplastic Ag / SnO by high-energy ball milling and supersonic jet milling technology. 2 Alloy materials and their preparation methods. Background technique [0002] Ag / SnO 2 As a material to replace Ag / CdO, alloy materials have been continuously improved and researched by scientific research institutes and enterprises in the related electrical field because of their good electrical and mechanical properties. So far, silver tin oxide alloy materials still have plastic processing problems in the process of swaging and drawing into wire or rivet products, and problems such as large contact resistance and temperature rise during electrical service life. For example, during the wire drawing process, it is impossible to continue drawing to meet the diameter specifications of the finished wire, and phenomena such as splits and fractures occur during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05C22C1/10
CPCC22C1/0466C22C1/05C22C5/06C22C32/0021
Inventor 张玲洁沈涛张继樊先平杨辉
Owner ZHEJIANG UNIV
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