GOLD POWDER, METHOD FOR PRODUCING GOLD POWDER, AND GOLD PASTE

WIPO Patent Application WO/2024/095820

A1

The present invention is a gold powder composed of 99.9 mass% or more pure gold, characterized in that the average particle size is from 0.1 μm to 0.5 μm and the coefficient of variation in the particle size is 18% or less. The gold powder according to the present invention is produced by a wet reduction method that includes a gold colloid synthesis step that synthesizes gold colloid particles by mixing a gold salt, a reducing agent, and a dispersant in a solvent and a gold powder granulation step that adds a gold salt and a reducing agent to the reaction solution containing the gold colloid particles generated by gold colloid synthesis and makes the gold colloid particles into gold powder. A dispersant containing a surfactant having a C16-18 alkyl group is used as the dispersant mixed in the gold colloid synthesis step.

JPS5873708	MANUFACTURE OF TANTALUM POWDER
JP3931503	MANUFACTURE OF LUBRICANT FOR WARM DIE LUBRICATION, IRON- BASE POWDER MIXTURE FOR WARM DIE LUBRICATING COMPACTION, HIGH DENSITY GREEN COMPACT OF IRON-BASE POWDER, AND HIGH DENSITY IRON-BASE SINTERED COMPACT

NAKAMURA NORIAKI (JP)
OGAWA KOHEI (JP)
MAKITA YUICHI (JP)
KOIZUMI TERUAKI (JP)
MURAI HIROSHI (JP)
INOUE KENICHI (JP)
OKADA YOHEI (JP)
SHIRATORI HARUKI (JP)
KAMIYA HIDEHIRO (JP)

PCT/JP2023/038293

May 10, 2024

October 24, 2023

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TANAKA PRECIOUS METAL IND (JP)
NATIONAL UNIV CORPORATION TOKYO UNIV OF AGRICULTURE AND TECHNOLOGY (JP)

B22F1/00; B22F1/05; B22F1/102; B22F1/107; B22F1/148; B22F9/24

CN113000852A	2021-06-22
JP2004285454A	2004-10-14
JPH0920903A	1997-01-21
JP2007063579A	2007-03-15

ORIGINATE IP (JP)

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