Ag-SnO-CdO electrical contact materials and manufacturing method thereof

摘要

Novel Ag-SnO-CdO electrical contact materials are disclosed, which are made of ternary Ag alloys consisting of more than 5-12 weight % of Sn, 0. 5-5 weight % of Cd, and a balance of Ag, the alloys having been prepared by melting and having been internal oxidized. Novel manufacturing methods are also disclosed, in which internal-oxidation is conducted in an oxygen atmosphere of more than 10 atm to 200 atm, at a temperature of 750° C. to 500° C., and at a condition that the alloys are kept at a solid phase not involving any liquid phase.