Method for making Ag/Pd electroding powder

Details Method for making Ag/Pd electroding powder Method for making Ag/Pd electroding powder

1985-01-18

1986-02-04

Brody, Christopher W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

419 31, 29 2542, 75 05B, 148126, H01G 700, B22F 100

Patent

active

045683840

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.

REFERENCES:
patent: 4324750 (1982-04-01), Maher

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