With the development of information technology, automation, automobile and aerospace technology, the demand for small, high power and high reliability relays, switches and other electrical appliances is more and more large, especially for its core -- electrical contact material performance index requirements are also more and more high.
In the electric contact materials, cadmium silver oxide has always been known as the universal contact of medium load electrical appliances, widely used in a variety of low voltage electrical appliances.However, due to the existence of cadmium (Cd), there will be "cadmium toxic" pollution in the whole process of production, use and recycling of silver cadmium oxide material, which will cause certain harm to human health and natural environment
Compared with silver cadmium oxide, silver tin oxide is considered to be one of the best materials to replace silver cadmium oxide because of its good fusion resistance, arc ablation resistance, wear resistance, non-toxic and harmless, environment-friendly material.
