| 摘要 |
PURPOSE:To obtain an electrical contact material having superior consumption resistance by dispersing uniformly and finely an oxide forming hardly a solid soln. with Ag such as NiO in an Ag matrix. CONSTITUTION:The electrical contact material is obtd. by dispersing uniformly and finely 0.1-20wt% one or more kinds of oxides selected among the oxides of Ni, Cr, Fe, Co, W and Ti each forming hardly a solid soln. with Ag in an Ag matrix. Ag powder is mixed with powder of one or more among Ni, Cr, Fe, Co, W and Ti each forming hardly a solid soln. with Ag, and the mixture is formed into a billet and sintered. The sintered body is extruded and drawn, and the resulting wire rod is cut to a length close to the diameter to obtain chips. The chips are oxidized, sintered again, compressed, and extruded to manufacture said electrical contact material. This material has superior contact characteristics, especially consumption resistance. |
