Method for making Ag/Pd electroding powder
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United States of America Patent
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Feb 4, 1986
Issued Date -
N/A
app pub date -
Jan 18, 1985
filing date -
May 12, 1983
priority date (Note) -
Expired
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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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