摘要
采用合金内氧化法＋粉末冶金方法制备了一种新型银氧化锡 （AgSnO2-La2O3 ）触头材料.其密度为 9.70～ 10.05 g/cm^3 ,硬度为 79.6～ 99.0, 电阻率为 3.20～ 3.50 μΩ· cm.用扫描电镜（SEM）及能谱分析（ EDS）对 AgSnO2 -La2O3 触头材料的显微组织进行分析发现,氧化物（La2O3 , SnO2）晶粒明显细化且呈细小球状 （＜0.5μm）及不规则形状 （＜3μm）两种形态均匀分布.对 AgSnO2 -La2O3 进行电性能试验和物理、机械性能的测定,并与合金内氧化法的 AgSnO2（8）-In2O3-T和 AgCdO（8）-T触头材料比较,结果表明, AgSnO2-La2O3材料的电性能、物理及机械性能与后两者相近,但侵蚀量略低于后二者,有望成为一种新型触头材料.
In this paper, a new type of contact material AgSnO2-La2O3 was studied. It was made by the methods of internal oxidation of the alloy and powder metallurgy . The density of the obtained contact tip is 9.70-10.05 g/cm^3, the hardness is 79.6-99.0, and the resistivity is 3. 20- 3. 50 μΩ·cm. The analysis on the microstructure of AgSnO2-La2O3 was made through SEM and EDS. We found that La2O3, SnO2 was exiguous and in existence of two states： gioboid （〈0.5μm） and anomalistic （〈3μm）. The contact＇s electrical performance, physical and mechanical properties of AgSnO2-La2O3 were tested and compared to AgSnO2 （8）-In2O3 （4）-T and AgCdO（8）-T. The result show that the electrical performance is better than the others and the physical and mechanical properties are similar. So AgSnO2-La2O3 may be a new type of contact material .
出处
《电工材料》
CAS
2006年第3期3-5,共3页
Electrical Engineering Materials
基金
河北省自然科学基金资助项目(502048)
