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Patent Searching and Data


Title:
DENDRITIC SILVER POWDER
Document Type and Number:
WIPO Patent Application WO/2017/094361
Kind Code:
A1
Abstract:
The present invention relates to and provides a new dendritic silver powder which, when mixed with a synthetic resin, gives electroconductive films having sufficient electroconductivity. Even when the films produced from a mixture of the dendritic silver powder and a synthetic resin vary in thickness, the electroconductivity of the films can be maintained. The dendritic silver powder, in an examination with an electron microscope (3,000-10,000 diameters), comprises silver powder particles which each have a shape composed of a trunk and a plurality of branches that branch off perpendicularly or obliquely from the trunk and have grown two- or three-dimensionally (referred to as "special dendritic silver powder particles"), the special dendtritic silver powder particles accounting for 50% or more by number of all the silver powder particles examined. The dendritic silver powder is characterized in that the volume-cumulative particle diameter D50 (referred to as "D50D") determined by adding the silver powder to water containing a dispersant, applying 300-watt ultrasonic waves to the resultant mixture for 3 minutes, and examining the dispersion with a laser diffraction/scattering type particle size analyzer is 1.0-15.0 µm and that the ratio of the volume-cumulative particle diameter D50 (referred to as "D50N") determined by adding the silver powder to the water containing a dispersant and examining the mixture under the same conditions as for the D50D except that no ultrasonic waves are applied, to the D50D, D50N/D50D, is 1.0-10.0.

Inventors:
MORINAKA HIROYUKI (JP)
WAKIMORI YASUNARI (JP)
OCHI KENTARO (JP)
Application Number:
PCT/JP2016/080484
Publication Date:
June 08, 2017
Filing Date:
October 14, 2016
Export Citation:
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Assignee:
MITSUI MINING & SMELTING CO (JP)
International Classes:
B22F1/00; B22F1/06; C25C5/02; H01B5/00; C25C1/20
Foreign References:
JP2009046696A2009-03-05
JP2005146387A2005-06-09
JP2007291499A2007-11-08
JP2007291513A2007-11-08
JP2013144829A2013-07-25
JP2015054982A2015-03-23
Attorney, Agent or Firm:
TAKEUCHI, ICHIZAWA & ASSOCIATES (JP)
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