Development of New Electric ContactAg−酸化物系カドミウムフリー電気接点材料
Tomoki OBA, Tomoyuki UENO大場友樹、上野智行
Key words
electric contact,silver,oxide ,silver-oxide system ,cadmium oxide, cadmium-free Internal oxidation method,welding resistance,wear resisitance
キーワード
電気接点、銀、酸化物、銀酸化物系、酸化カドミウム、カドミウムフリー、内部酸化法、耐溶着性、耐消耗性
Abstract
A lot of silver-cadmium oxide system contact materials are widly used as electrical contacts such as breaker for distribution(MCCB) and electromagnetic switches(MS),because cadmium oxide (CdO) has good properties. However, Cadmium (Cd) might be harmful. We know this material causes environmental problems in the future. ISO14000 also requires this problem to be solved. Then, it is necessary to develop new cadmium-free silver-oxide system contact materials.
Now, we have developed the new contact "CL-8", which is cadmium-free silver-oxide system.
This "CL-8" shows good properties and performances. It will solve above environmental problems.
