Electrode material

Abstract

A process for forming an electrode assembled into a vacuum interrupter is composed of the steps of blending silver(Ag) powder and chromium(Cr) powder in a content ratio such that Ag powder forms a matrix and Cr powder being dispersed therein, the blending ratio is prefer to be determined to contain 50 to 95 wt. % of Ag powder and 5 to 50 wt. % of Cr powder, compacting the blended powder to a compacted body, sintering the body at temperatures around melting point of Ag, and regulating density of the sintered article at least 90%. Particle size of Cr to be blended may be determined less than 150 .mu.m, more preferably, less than 60 .mu.m. Sintering temperature may be determined between 800.degree. to 950.degree. C.

Dependencies are inferred from the claim text.