Title:
SM-FE-N-BASED MAGNETIC POWDER AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/063171
Kind Code:
A1
Abstract:
[Problem] To provide an Sm-Fe-N-based magnetic powder that is configured from fine-sized particles advantageous for improving coercivity, that contains minimal impurities, and that is useful for improving the productivity and performance of bond magnets. [Solution] A powder composed of particles having Sm, Fe, and N as main components, the powder having a composition in which the molar ratio Sm/Fe of Sm to Fe is 0.09-0.25, the molar ratio N/Fe of N to Fe is 0.06-0.30, and the Ca content of the powder is 0.002 mass% or less, and, in a volume-based grain size distribution measured by laser diffraction/scattering, D50 being 2.0-11.0 μm, and D10, D50, and D90 satisfying the following relationship (1), where D10 is the cumulative 10% particle diameter, D50 is the cumulative 50% particle diameter, and D90 is the cumulative 90% particle diameter. Relationship (1): (D90−D10)/D50≤1.10
Inventors:
YAMADA TOMOYA (JP)
YAMADA TAKAHIRO (JP)
SATO KIMITAKA (JP)
KATO SHOGO (JP)
KUMON SHOICHI (JP)
YAMADA TAKAHIRO (JP)
SATO KIMITAKA (JP)
KATO SHOGO (JP)
KUMON SHOICHI (JP)
Application Number:
PCT/JP2022/037132
Publication Date:
April 20, 2023
Filing Date:
October 04, 2022
Export Citation:
Assignee:
DOWA HOLDINGS CO LTD (JP)
International Classes:
B22F1/00; B22F1/05; B22F1/065; B22F1/14; B22F9/08; C22C1/04; C22C38/00; C23C8/24; H01F1/059; H01F1/06; H01F41/02
Foreign References:
| JP2012241280A | 2012-12-10 | |||
| JP2006249571A | 2006-09-21 | |||
| JP2017117937A | 2017-06-29 |
Attorney, Agent or Firm:
KOMATSU Takashi (JP)
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