反应合成银氧化锡电接触材料导电性能研究  

Investigation of Electrical Conductivity of Silver Tin Oxide Electrical Contact Materials Fabricated by Reactive Synthesis

作　　者：陈敬超[1] 孙加林[2] 杜焰[1] 周晓龙[1] 甘国友[1] 

机构地区：[1]昆明理工大学,云南昆明650093 [2]昆明贵金属研究所,云南昆明650221

出　　处：《稀有金属材料与工程》2003年第12期1053-1056,共4页Rare Metal Materials and Engineering

基　　金：国家科技攻关(2001BA326C);云南省科技攻关(2000B-03)联合资助项目

摘　　要：采用反应合成技术和传统粉末冶金技术制备银氧化锡(AgSnO2)电接触材料。对AgSnO2块体材料进行导电率测试和X射线衍射分析,对块体材料及冷拉拔的AgSnO2线材进行显微组织分析(扫描电镜、透射电镜)。研究结果表明:采用反应合成技术可以在银基体中合成尺寸细小、界面新鲜的SnO2颗粒,制备AgSnO2电接触材料;反应合成法制备的AgSnO2材料中,微米级的SnO2颗粒系由纳米级的SnO2颗粒聚集而成;反应合成法制备的AgSnO2电接触材料较传统粉末冶金法制备的AgSnO2电接触材料具有更高的导电性;采用反应合成法制备的AgSnO2电接触材料由于改变了Ag和SnO2的结合状态使材料的加工性能和导电性能同时得到改善和提高。Silver tin oxide (AgSnO2) was fabricated using the conventional powder metallurgy (PM) and a new reactive synthesis (RS) method. Electrical conductivity measurement and X-ray diffraction analysis were carried out on bulk AgSnO2 microstructures were determined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) on the bulk AgSnO2 and its cold drawn wire. The results show that SnO2 particles with finer size and fresh interface can be formed in silver matrix as a result of the fabrication of AgSnO2 electrical contact materials by reactive synthesis. micrometer-size tin oxide particles were assembled from nanometer-scale particles during the. RS process. Compared to conventionally PM processed, AgSnO2 electrical contact materials those fabricated by the RS process have a higher conductivity. and workability as a result of a change of combination states of silver and tin oxide.

关 键 词：银氧化锡 电接触材料 反应合成 粉末冶金 导电率 

分 类 号：TM241[一般工业技术—材料科学与工程] TF125.23[电气工程—电工理论与新技术]