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Title:
FINE SILVER PARTICLES, METHOD FOR PRODUCING SAME, CONDUCTIVE PASTE CONTAINING THE FINE SILVER PARTICLES, CONDUCTIVE FILM, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/040521
Kind Code:
A1
Abstract:
Disclosed are fine silver particles having an average particle diameter (DSEM) of 30-100 nm and a polycrystallization degree (which is the ratio of the average particle diameter (DSEM) to the crystallite diameter (DX), namely (DSEM)/(DX)) of not less than 2.8. The fine silver particles are able to be obtained by the following procedure: an alcohol solution of an amine complex of silver nitrate prepared using silver nitrate and one or more kinds of amines that are water-soluble or water-soluble to some extent and have a boiling point of not more than 200˚C is added into a water-alcohol mixed solvent, into which ascorbic acid or erythorbic acid is dissolved, for reducing and depositing fine silver particles, and the thus-obtained fine silver particles are separated, cleaned, and then vacuum dried or vacuum freeze dried at a temperature of not more than 30˚C. The thus-obtained fine silver particles are polycrystallized fine silver particles that have an average particle diameter of 30-100 nm and are suitable as a starting material for a conductive paste that can be fired at low temperatures.

Inventors:
KAKIHARA YASUO (JP)
OHSUGI MINEKO (JP)
MORII HIROKO (JP)
HAYASHI KAZUYUKI (JP)
Application Number:
PCT/JP2010/067075
Publication Date:
April 07, 2011
Filing Date:
September 30, 2010
Export Citation:
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Assignee:
TODA KOGYO CORP (JP)
KAKIHARA YASUO (JP)
OHSUGI MINEKO (JP)
MORII HIROKO (JP)
HAYASHI KAZUYUKI (JP)
International Classes:
B22F1/00; B22F1/054; B22F9/24; H01B1/22; H01B5/00; H01B13/00
Domestic Patent References:
WO2005025787A12005-03-24
WO2008018718A12008-02-14
Foreign References:
JP2006183072A2006-07-13
JP2008133527A2008-06-12
JP2000129318A2000-05-09
JP2004111254A2004-04-08
JP2009127085A2009-06-11
JP2005048236A2005-02-24
JP2005048237A2005-02-24
JP2006348345A2006-12-28
JP2009088340A2009-04-23
JP2008198595A2008-08-28
Attorney, Agent or Firm:
OKADA, KAZUHIKO (JP)
Kazuhiko Okada (JP)
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