表面修饰对AgSnO_2触头材料组织性能的影响  

Influence of surface modification on the structure and properties of AgSnO_2 electric contact materials

作　　者：郑冀[1] 张尧卿[1] 李松林[1] 高后秀[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《材料热处理学报》2006年第5期118-121,共4页Transactions of Materials and Heat Treatment

基　　金：天津市自然科学基金(43614030006)资助项目

摘　　要：研究了表面修饰对AgSnO2触头材料的组织和性能的影响。考察了分散剂聚乙二醇对纳米SnO2溶胶的表面修饰作用;分析了化学镀的工艺对纳米掺杂AgSnO2电触头材料性能的影响。结果表明:采用分散剂和化学镀对纳米SnO2表面进行修饰,减少了纳米SnO2的硬团聚,改善了Ag与SnO2之间的浸润性和相容性,使AgSnO2触头材料的电导率提高23%,抗拉强度提高66%,伸长率提高100%,解决了AgSnO2材料的机加工性能差的问题。A series of novel doped nanocrystalline SnO_2 materials has been prepared,which focused on improving the electric and mechanical properties of AgSnO_2 electric contact materials.Chemical plating method was employed to modify the surface of the doped nanocrystalline SnO_2 particles,which decreased the hard congregation of SnO_2 particles,improved the wetting property and enhanced the cohesion between SnO_2 nano-particles and silver.As a result,the conductance of AgSnO_2 electric contact material increases by 23%.The tensile strength and elongation of the material increase by 66% and 100%,respectively.

关 键 词：电接触材料 银氧化锡 表面修饰 化学镀 

分 类 号：TG146.32[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]