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Title:
PROCESS FOR PRODUCING METALLIC NANOPARTICLE WITH LOW-TEMPERATURE SINTERABILITY, METALLIC NANOPARTICLE, AND PROCESS FOR PRODUCING DISPERSION CONTAINING THE SAME
Document Type and Number:
WIPO Patent Application WO/2010/137080
Kind Code:
A1
Abstract:
Provided is a fine silver powder coated with a protective material and capable of being sintered at a considerably lower temperature than conventional ones. The fine silver powder comprises silver particles which have an average particle diameter (DTEM) of 3-20 nm or an X-ray crystal-grain diameter (DX) of 1-20 nm and have been coated with an organic protective material constituted of a C6-12 primary amine (B).  This fine silver powder has such a property that when the powder is mixed with an organic medium to prepare a silver coating material and this coating material is applied, then burning the resultant coating film in the air at 120°C gives a conductive film having a resistivity of 25 µΩ·cm or lower.  This fine silver powder can be produced by: mixing a C6-12 primary amine (B) with a silver particle dispersion which comprises an organic medium and, dispersed therein as primary particles, silver particles coated with a primary amine (A) having an unsaturated bond and a molecular weight of 200-400; and keeping the mixture at 50-80°C with stirring to yield sediment particles.

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Inventors:
NAKANOYA, Taro (14-1, Soto-kanda 4-chome, Chiyoda-k, Tokyo 21, 〒1010021, JP)
中野谷太郎 (〒21 東京都千代田区外神田四丁目１４番１号ＤＯＷＡエレクトロニクス株式会社内 Tokyo, 〒1010021, JP)
Application Number:
JP2009/002433
Publication Date:
December 02, 2010
Filing Date:
June 01, 2009
Export Citation:
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Assignee:
DOWA ELECTRONICS MATERIALS CO., LTD. (14-1, Soto-kanda 4-chome Chiyoda-k, Tokyo 21, 〒1010021, JP)
ＤＯＷＡエレクトロニクス株式会社 (〒21 東京都千代田区外神田四丁目１４番１号 Tokyo, 〒1010021, JP)
NAKANOYA, Taro (14-1, Soto-kanda 4-chome, Chiyoda-k, Tokyo 21, 〒1010021, JP)
International Classes:
B22F1/02; B22F1/00; B22F9/00; H01B5/00; H01B13/00
Attorney, Agent or Firm:
HIROKOH, Masaki (Tatsuno Nishi-Tenma Bldg, 1-6 Nishi-Tenma 3-chome, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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