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US 4,908,158 AGranted
Electrical contact material and method of preparing same
AssigneeMatsushita Electric Works, Ltd.
InventorsKoji Tsuji, Shuji Yamada, Yoshinobu Takegawa
Life of this patent
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Abstract
An electrical contact material consists of Ag in which a metallic oxide is produced and dispersed through an internal oxidation and containing as metallic elements Cd, Mn and Al. With this contact material of this composition, there can be shown a high anti-welding property and a stably low contact resistance.
Claims3
A contact material comprising:
- an Ag matrix and a metallic oxide of Cd, Mn, and Al wherein said oxide is produced and dispersed in said Ag matrix by internal oxidation and wherein said metallic oxide contains Cd of 1 to 20 wt %, Mn of 0.001 to 0.2 wt % and Al of 0.001 to 0.2 wt %.
Dependencies are inferred from the claim text.