摘要 |
<p>Disclosed is an electrical contact having high electrical conductivity made of an internally oxidized silver-oxide material for a compact electromagnetic relay which is prepared by subjecting an Ag alloy having a composition consisting essentially of, by weight, 5.1 to 9% Sn, 1.5 to 5% In, and 0.005 to 0.06% Bi, with the balance consisting of Ag and unavoidable impurities, to an internal oxidation treatment and then subjecting to a heat treatment for diffusion, aggregation, and growth of precipitated oxides, wherein the internally oxidized silver-oxide material has a metallographic structure such that coarse grains of composite oxides (12) are dispersed and distributed in an Ag matrix (11), the coarse grains of composite oxides being formed as a result of coarsening of ultra-fine grains of Sn-based oxides and ultra-fine grains of In-based oxides, which are precipitated by the internal oxidation treatment, by the heat treatment for diffusion, aggregation, and growth of the precipitated oxides.</p> |
申请人 |
MITSUBISHI MATERIALS C.M.I. CORPORATION |
发明人 |
UEMURA, YUZO;UEDA, KOSHIRO;MURAHASHI, NORIAKI;YAMANASHI, SHINJI;TAKI, MICHIO;ENDO, HIROYASU |