添加La的纳米复合AgSnO_2电接触合金的制备  

Preparation of Nanocomposite AgSnO_2 Contact Alloy with Lanthanum

作　　者：张燕[1] 王俊勃[1] 杨敏鸽[1] 丁秉钧[2] 赵燕[1] 

机构地区：[1]西安工程科技学院机电工程学院 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《低压电器》2006年第3期6-10,共5页Low Voltage Apparatus

基　　金：国家自然科学基金资助项目(50471033);陕西省自然科学基金资助项目(2004E112)

摘　　要：采用化学共沉淀法制备出纳米复合SnO2,用高能球磨及热压烧结和常压烧结两种工艺制备出纳米复合AgSnO2电接触合金,测定纳米复合电接触合金的主要物理性能,并通过XRD、TEM和FESEM等手段对复合粉末和电接触合金进行了组织结构分析。结果表明,该方法可以制备出性能较好、纳米颗粒均匀弥散分布于Ag基体上的复合电接触合金,同时La的加入有效抑制了SnO2晶粒的长大,提高了纳米SnO2在银基体中分布的均匀性。The preparation methods of nanocomposite SnO2 powders and AgSnO2 contact alloys to be fabricated separately by chemical co-precipitate method and high-energy ball milling, hot-pressing ＆ sintering or general sintering technologies were studied. The main physics performances were measured, and the structures of nanosized powders and contacts alloys were analyzed by XRD, TEM and FESEM, the results show that nanocomposite contact alloys in which nanosized particles dispersed evenly in Ag based and have better performances can be obtained by the two technologies, La doping effectively prevents nanosized SnO2 grown-up, improves uniformity of SnO2 disperse in Ag.

关 键 词：纳米复合 LA AGSNO2 电接触合金 

分 类 号：TM504[电气工程—电器] TG146.4[一般工业技术—材料科学与工程]