Title:
METAL POWDER, PRODUCTION METHOD THEREFOR, AND SINTERING TEMPERATURE PREDICTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/004105
Kind Code:
A1
Abstract:
One of the problems addressed by the present invention is to provide a metal powder that comprises metal particles in which the concentration and distribution of sulfur are controlled, and a production method therefor. The provided method for producing the metal powder comprises generating a metal chloride gas by chlorinating a metal with chlorine, and generating metal particles by reducing a gaseous metal chloride in the presence of a gas containing sulfur. The reduction is done such that the bulk concentration of sulfur in the metal particles is between 0.01 wt% and 1.0 wt%, inclusive, and such that the local concentration of sulfur at a position 4 nm from the surface of the metal particles is at least 2 at%. The bulk concentration and local concentration are estimated by using an inductively coupled plasma atomic emission spectrometer and an energy-dispersive X-ray spectroscopic analyzer provided on a scanning transmission electron microscope, respectively.
Inventors:
NISHIJIMA KAZUMOTO (JP)
KOBAYASHI RYOTA (JP)
ROKKAKU HIROSUKE (JP)
ASAI TSUYOSHI (JP)
KOBAYASHI RYOTA (JP)
ROKKAKU HIROSUKE (JP)
ASAI TSUYOSHI (JP)
Application Number:
PCT/JP2019/023910
Publication Date:
January 02, 2020
Filing Date:
June 17, 2019
Export Citation:
Assignee:
TOHO TITANIUM CO LTD (JP)
International Classes:
B22F1/00; B22F9/28; C22C19/03
Domestic Patent References:
| WO2011037150A1 | 2011-03-31 | |||
| WO2015156080A1 | 2015-10-15 |
Foreign References:
| JP2005008981A | 2005-01-13 |
Attorney, Agent or Firm:
TAKAHASHI, HAYASHI AND PARTNER PATENT ATTORNEYS, INC. (JP)
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