PROCESS FOR PRODUCING FLAKY SILVER POWDER AND FLAKY SILVER POWDER PRODUCED BY THE PROCESS

Title:

PROCESS FOR PRODUCING FLAKY SILVER POWDER AND FLAKY SILVER POWDER PRODUCED BY THE PROCESS

Document Type and Number:

WIPO Patent Application WO/2007/034810

Kind Code:

A1

Abstract:

A process for producing a flaky silver powder which has excellent powder properties and which, when used to prepare a conductive paste, can prevent the paste from giving a conductor having increased resistance. The silver powder can prevent a conductivity decrease without fail. The process for producing a flaky silver powder is characterized by comprising: a dispersion step in which a fine silver powder composed of approximately spherical silver particles is dispersed in a solvent to prepare a slurry; a processing step in which the slurry and medium beads having a particle diameter of 0.2 mm or smaller are introduced into a bead mill and mixed and stirred to plastically deform each silver particle to form flaky silver particles; a separation/collection step in which the slurry is separated from the medium beads and the flaky silver particles are collected; and a washing/drying step in which the flaky silver particles collected are washed and dried to remove impurities and water and obtain the flaky silver particles.

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Inventors:

FUJIMOTO TAKU (JP)
SASAKI TAKUYA (JP)
YOSHIMARU KATSUHIKO (JP)

Application Number:

PCT/JP2006/318590

Publication Date:

March 29, 2007

Filing Date:

September 20, 2006

Export Citation:

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Assignee:

MITSUI MINING & SMELTING CO (JP)
FUJIMOTO TAKU (JP)
SASAKI TAKUYA (JP)
YOSHIMARU KATSUHIKO (JP)

International Classes:

B22F1/00; B22F1/068; B22F9/04; H01B5/00; H01B13/00

Foreign References:

JP2000234107A	2000-08-29
JP2005240094A	2005-09-08
JP2004183010A	2004-07-02

Attorney, Agent or Firm:

YOSHIMURA, Katsuhiro (Omiya F Bldg. 5-4, Sakuragicho 2-chome, Omiya-k, Saitama-shi Saitama, JP)

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