The Structure and Properties of the Internal Oxidized of Silver-Zinc Alloys for Electric Contact

The effect of additional some elements on the structure and electric properties of internal oxidized Ag-4-8.5 wt% Zn alloys has been investis gated.
Three kinds of experiments has been done, e. g. (1) adding Te, Al, and Ni; (2) adding Te, In and Sn; (3) adding Al and Ni. Both cases (1) and(2) have shown the improvement of the structure of oxides, but the case (3) has not.
The results indicate that adding a small amount of available lements and controlling the content of ZnO can improve the such performance of switch in electric contact materials as to gain high resistance to welding adhesion, high resistance to erosion and low contact resis-etance.