Title:
PRODUCTION METHOD FOR PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER AND PHOSPHATE-COATED SmFeN-BASED ANISOTROPIC MAGNETIC POWDER
Document Type and Number:
WIPO Patent Application WO/2022/107461
Kind Code:
A1
Abstract:
The present invention provides: a phosphate-coated SmFeN-based anisotropic magnetic powder that has excellent coercivity; and a production method for the phosphate-coated SmFeN-based anisotropic magnetic powder. The present invention relates to a production method for a phosphate-coated SmFeN-based anisotropic magnetic powder that includes a step for adding an inorganic acid to a slurry that includes an SmFeN-based anisotropic magnetic powder, water, and a phosphate compound and adjusting the pH of the slurry to 1–4.5 to obtain an SmFeN-based anisotropic magnetic powder that is coated with phosphate.
Inventors:
ABE MASAHIRO (JP)
YAMANAKA SATOSHI (JP)
TADA SHUICHI (JP)
IWAI KENTA (JP)
YANO TAKAYUKI (JP)
YAMANAKA SATOSHI (JP)
TADA SHUICHI (JP)
IWAI KENTA (JP)
YANO TAKAYUKI (JP)
Application Number:
PCT/JP2021/036175
Publication Date:
May 27, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
NICHIA CORP (JP)
International Classes:
H01F41/02; B22F1/00; B22F1/14; B22F1/16; B22F3/00; B22F3/02; B22F9/00; C01G49/00; C22C38/00; H01F1/059; H01F1/08
Domestic Patent References:
| WO2021014837A1 | 2021-01-28 |
Foreign References:
| JP2002043109A | 2002-02-08 | |||
| JP2017210662A | 2017-11-30 | |||
| JP2002075767A | 2002-03-15 | |||
| JP6780693B2 | 2020-11-04 |
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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