Title:
METAL POWDER, METHOD FOR PRODUCING SAID METAL POWDER, AND METAL PASTE
Document Type and Number:
WIPO Patent Application WO/2024/095821
Kind Code:
A1
Abstract:
The present invention relates to a metal powder which has an average particle diameter of 0.1-0.4 μm and comprises Au, Ag, or Cu metal having a purity of 99.9 mass% or higher or an alloy of these. In this metal powder, the proportion by number of non-spherical metal particles having a ratio between the minor-axis length a and the major-axis length b of 3 or greater is 1% or less. In a preferred embodiment, the proportion by number of coarse particles each having a particle diameter of 0.5 μm or larger is 10% or less. This method for producing such metal powder is a wet reduction method comprising a metal colloid synthesis step and a metal powder particle formation step in which metal colloid particles are formed into particles to obtain a metal powder. In the metal colloid synthesis step and the metal powder particle formation step, use is made of first and second dispersants which are preferably surfactants each having an alkyl group in which the number of carbon atoms is within a given range.
Inventors:
NAKAMURA NORIAKI (JP)
OGAWA KOHEI (JP)
INOUE KENICHI (JP)
MURAI HIROSHI (JP)
MAKITA YUICHI (JP)
KOIZUMI TERUAKI (JP)
OKADA YOHEI (JP)
SHIRATORI HARUKI (JP)
KAMIYA HIDEHIRO (JP)
OGAWA KOHEI (JP)
INOUE KENICHI (JP)
MURAI HIROSHI (JP)
MAKITA YUICHI (JP)
KOIZUMI TERUAKI (JP)
OKADA YOHEI (JP)
SHIRATORI HARUKI (JP)
KAMIYA HIDEHIRO (JP)
Application Number:
PCT/JP2023/038294
Publication Date:
May 10, 2024
Filing Date:
October 24, 2023
Export Citation:
Assignee:
TANAKA PRECIOUS METAL IND (JP)
NATIONAL UNIV CORPORATION TOKYO UNIV OF AGRICULTURE AND TECHNOLOGY (JP)
NATIONAL UNIV CORPORATION TOKYO UNIV OF AGRICULTURE AND TECHNOLOGY (JP)
International Classes:
B22F1/065; B22F1/00; B22F1/052; B22F1/102; B22F1/107; B22F9/00; B22F9/24
Domestic Patent References:
| WO2012063747A1 | 2012-05-18 | |||
| WO2012046641A1 | 2012-04-12 |
Foreign References:
| JP2015206087A | 2015-11-19 | |||
| JP2006265585A | 2006-10-05 | |||
| JP2006152344A | 2006-06-15 | |||
| JP2011117021A | 2011-06-16 | |||
| JPH0920903A | 1997-01-21 |
Attorney, Agent or Firm:
ORIGINATE IP (JP)
Download PDF:
Previous Patent: GOLD POWDER, METHOD FOR PRODUCING GOLD POWDER, AND GOLD PASTE
Next Patent: METHOD FOR PRODUCING FIBER-REINFORCED CELLULOSE-BASED RESIN
Next Patent: METHOD FOR PRODUCING FIBER-REINFORCED CELLULOSE-BASED RESIN