这三种电触头具有相同的组成、制造工艺和类似的结构。它们的体积百分地均是:50∶50,都采用压结—烧结—熔浸工艺,于是具有类似的显微结构。比较它们的热物理学、力学和电学性能发现,硬度、电导率和热膨胀系数都与难熔性能成正比。毫伏为单位的接触电位降,Ag—W 最大,其后是 Ag—Mo 和 Ag—WC。开关试验寿命最长的是 The three types of electrical contacts have the same composition, manufacturing process, and the like. Their volume percentages are: 50:50, are used sinter - sintering - melting process, and thus have a similar microstructure. Comparing their thermophysical, mechanical and electrical properties, it is found that hardness, electrical conductivity, and thermal expansion coefficients are all proportional to the refractory properties. The contact potential drop in millivolts, Ag-W max, followed by Ag-Mo and Ag-WC. Switch test life is the longest