Title:
SILVER FINE PARTICLES AND PROCESSES AND EQUIPMENT FOR THE PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2008/013274
Kind Code:
A1
Abstract:
A process for production of silver fine particles which is characterized by making
an aqueous silver ammine complex solution and a reducing agent solution meet
each other in an open space to reduce the silver ammine complex and deposit silver
fine particles, either in which the meeting is conducted by (i) a method of spraying
an aqueous silver ammine complex solution and a reducing agent solution through
nozzles or (ii) a method of ejecting an aqueous silver ammine complex solution
and a reducing agent solution from obliquely downward nozzles opposite to each
other to thereby produce silver fine particles which are free form coarse particles
having particle sizes of 5μm or above and have a mean particle size of primary
particles of 0.08 to 1.0μm and crystallite sizes of 20 to 150nm or in which
an aqueous silver ammine complex solution having a silver concentration of 20
to 180g/L and an organic reducing agent solution having a reducing agent concentration
of about 0.6 to about 1.4 times the silver concentration by reaction equivalent
are used to thereby stably produce silver fine particles having a mean particle
size of primary particles of 0.05 to 1.0μm and crystallite sizes of 20 to
150nm.
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Inventors:
KUBA, Kanji (Central Research Institute Chemical Processing Laboratory, 15-2, Aza Fukimatsu, Onahama, Iwaki-sh, Fukushima 01, 9718101, JP)
久芳 完治 (〒01 福島県いわき市小名浜字吹松１５番地２ 三菱マテリアル株式会社中央研究所反応プロセス開発センター内 Fukushima, 9718101, JP)
HIGAMI, Akihiro (Central Research Institute Chemical Processing Laboratory, 15-2, Aza Fukimatsu, Onahama, Iwaki-sh, Fukushima 01, 9718101, JP)
久芳 完治 (〒01 福島県いわき市小名浜字吹松１５番地２ 三菱マテリアル株式会社中央研究所反応プロセス開発センター内 Fukushima, 9718101, JP)
HIGAMI, Akihiro (Central Research Institute Chemical Processing Laboratory, 15-2, Aza Fukimatsu, Onahama, Iwaki-sh, Fukushima 01, 9718101, JP)
Application Number:
JP2007/064793
Publication Date:
January 31, 2008
Filing Date:
July 27, 2007
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORPORATION (5-1 Otemachi 1-chome, Chiyoda-ku Tokyo, 17, 1008117, JP)
三菱マテリアル株式会社 (〒17 東京都千代田区大手町一丁目５番１号 Tokyo, 1008117, JP)
KUBA, Kanji (Central Research Institute Chemical Processing Laboratory, 15-2, Aza Fukimatsu, Onahama, Iwaki-sh, Fukushima 01, 9718101, JP)
久芳 完治 (〒01 福島県いわき市小名浜字吹松１５番地２ 三菱マテリアル株式会社中央研究所反応プロセス開発センター内 Fukushima, 9718101, JP)
三菱マテリアル株式会社 (〒17 東京都千代田区大手町一丁目５番１号 Tokyo, 1008117, JP)
KUBA, Kanji (Central Research Institute Chemical Processing Laboratory, 15-2, Aza Fukimatsu, Onahama, Iwaki-sh, Fukushima 01, 9718101, JP)
久芳 完治 (〒01 福島県いわき市小名浜字吹松１５番地２ 三菱マテリアル株式会社中央研究所反応プロセス開発センター内 Fukushima, 9718101, JP)
International Classes:
B22F1/00; B22F9/24; H01B13/00
Attorney, Agent or Firm:
SHIGA, Masatake et al. (2-3-1, Yaesu Chuo-k, Tokyo 53, 1048453, JP)
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