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Patent Searching and Data


Title:
ELECTRICALLY CONDUCTIVE FINE METAL POWDER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH0790309
Kind Code:
A
Abstract:

PURPOSE: To improve the electric conductivity of the fine metal powder and to reduce its specific resistance by charging the fine metal powder and a soft metal powder having conductivity higher than that of the fine metal powder into a mixing agitator to form a pressure-coating film of the soft metal powder on the surface of the fine metal powder.

CONSTITUTION: The fine metal powder 4 consisting of Ni, Cu, Ag, Al, Fe, Zn, a powdery mixture of Fe with Cr or a Fe-Cr alloy powder is prepared and a soft metal powder consisting of Au, Ag, Cu or In, each of which has conductivity higher than that of this fine metal powder 4, softness and ductility and is hardly oxidized, is also prepared. Then, this soft metal powder and the fine metal powder 4 are charged into a mixing agitator to form a pressure-coating film 11 of the soft metal powder on the surface of the fine metal powder 4. Thus, the conductive metal powder 10 which has spherical or flat flaky shape having a circular or elliptical cross section can be produced by coating the outer circumferential face of the fine metal powder 4 with the conductive pressure-coating film 11.


Inventors:
SUGIKAWA HIROFUMI
Application Number:
JP22928693A
Publication Date:
April 04, 1995
Filing Date:
September 14, 1993
Export Citation:
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Assignee:
KATAYAMA TOKUSHU KOGYO KK
International Classes:
B22F1/02; (IPC1-7): B22F1/02
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)