【作者】 王海涛；

【导师】 王景芹；

【作者基本信息】 河北工业大学 ， 电机与电器， 2007， 博士

【摘要】 银氧化镉电触头材料具有优良的开关运行特性,因而成为低压电器广泛应用的一类触头材料。但AgCdO材料在制造和使用过程中产生的“镉毒”已日益受到了人们的关注,因此研究新型触头材料受到了广泛的重视。银氧化锡是最有希望代替银氧化镉材料的无毒触头材料。但AgSnO2材料有其致命不足,接触电阻较大、温升较高,严重影响电器使用性能;而且AgSnO2的高硬度使得AgSnO2复合材料成型变得异常困难。因此如何从成分设计、制造方法等方面解决AgSnO2触头材料的上述关键问题一直是触头材料研究中的一个非常重要的领域。本文结合河北省自然科学基金资助项目“银氧化锡触头材料性能改善机理的研究”(编号:502048),对添加稀土氧化物的银氧化锡触头材料进行了详细的研究。首先通过试验验证了稀土氧化物的难分解性及氧化铋的润湿性。采用化学共沉淀法制备了添加稀土氧化物的银氧化锡触头材料,测量了该触头材料的物理机械性能,分析了工艺参数对性能的影响,对该材料进行了显微组织分析。利用电接触触点材料综合参数测试仪对该材料进行了电接触性能的测试。最后,将该材料与AgCdO材料分别安装在CJ20-40交流接触器上,进行温升、通断能力及侵蚀量试验。更多还原

【Abstract】 Because of its excellent switch characteristics, AgCdO, as a contact material, has been widely used in the production of low-voltage electric apparatus. Meanwhile the AgCdO material has disadvantage that cannot be ignored: the Cadmium Poisoning which appears during the manufacture and use of AgCdO. Therefore, the researches of new contact material are extensively regarded. Silver tin oxide is the most promising non-toxic material to substitute silver cadmium oxide. But AgSnO2 material has its fatal shortages: large contact resistance and high temperature rise. These two points seriously affect the electrical performance of low-voltage electric apparatus that adopt AgSnO2. The hige hardness of AgSnO2 makes the composite molding of it extremely difficult. So, it is a very important issue in contact materials research to solve the above key problems from the component design and manufacuture method.Based on the Natural Science Foundation of Hebei Province, Study on Performance Improvement Mechanism of the Silver Tin Oxide Contact Material (ID: 502048), the addition of rare earth oxides of silver tin oxide contact material is studied detailly in this paper. First, it is validated that the rare earth oxides is difficult to decompose and the bismuth oxide is wettable. Silver tin oxide contact material is prepared by chemical coprecipitation which is added rare earth oxides. The physical properties of the contact material are measured. The influence of technical parameters on performance is analysised. The microstructure of the material is analysised. And then, the electrical performance is tested by Electrical Contact Material Parameter Tester. Finally, The Ag/SnO2+ La2O3+ Bi2O3 material and AgCdO material are respectively assembled on the CJ20-40 alternating contactors. The temperature rise, make-break capacity and arc erosion have been tested.更多还原