Silver powder and method for producing same

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United States of America Patent

PATENT NO 11420256
APP PUB NO 20200238388A1
SERIAL NO

16648423

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Abstract

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A silver powder which has a small content of carbon and which is difficult to be agglutinated, and a method for producing the same. While a molten metal, which is prepared by melting silver to which 40 ppm or more of copper is added, is allowed to drop, a high-pressure water is sprayed onto the molten metal to rapidly cool and solidify the molten metal to produce a silver powder which contains 40 ppm or more of copper, 0.1% by weight or less of carbon and 0.1% by weight or less of oxygen and wherein the particle diameter (D50 diameter) corresponding to 50% of accumulation in volume-based cumulative distribution of the silver powder, which is measured by means of a laser diffraction particle size analyzer, is in the range of from 1 μm to 15 μm, the average particle diameter (SEM diameter) of single particles being in the range of from 1 μm to 8 μm when it is measured by means of a field emission scanning electron microscope (SEM), the ratio (SEM diameter/D50 diameter) of the SEM diameter to the D50 diameter being in the range of from 0.3 to 1.0.

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Patent Owner(s)

Patent OwnerAddress
DOWA ELECTRONICS MATERIALS CO LTD4-14-1 SOTOKANDA CHIYODA-KU TOKYO 1010021 ?1010021

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inoue, Kenichi Tokyo, JP 148 1457
Michiaki, Yoshiyuki Tokyo, JP 13 27
Yoshida, Masahiro Tokyo, JP 528 5298

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