Ag/Pd electroding powder and method for making

Details Ag/Pd electroding powder and method for making Ag/Pd electroding powder and method for making

1983-05-12

1985-02-19

Smith, John D.

Metal treatment

Stock

Noble metal base

75951, 427 79, 419 21, 428403, H01G 101

Patent

active

045003688

ABSTRACT:
Pure silver and palladium powders are thoroughly mixed and dispersed by ball milling in a solution of a surfactant in a liquid vehicle. After drying and granulating, the resulting powder was heated to 500.degree. C., first to form an Ag/Pd alloy powder and then to cause palladium to precipitate from the interior of the alloy particles, to form a protective barrier of PdO on the alloy particle surfaces and to alter the alloy to 90Ag/10Pd. This powder, when used to make a buried electrode in a ceramic capacitor changes dimensions very little up to 500.degree. C. in the early stage of sintering the ceramic below which temperature the ceramic is weakest and most subject to cleaving.

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Abe et al., "Development of Thick-Film Capacitor . . . " IEEE Transactions on Components, Hybrids, and Manufacturing Technology, vol. CHMT-2, No. 4, Dec., 1979, pp. 434-441.

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