Title:
SMFEN-BASED ANISOTROPIC MAGNETIC POWDER AND BONDED MAGNET, AND METHOD FOR PRODUCING SAID POWDER AND MAGNET
Document Type and Number:
WIPO Patent Application WO/2023/048003
Kind Code:
A1
Abstract:
Provided are: an SmFeN-based anisotropic magnetic powder which exhibits excellent magnetic characteristics and having a low oxygen content; and a method for producing the same. The method for producing the SmFeN-based anisotropic magnetic powder comprises: a step for preparing a pre-dispersion SmFeN-based anisotropic magnetic powder containing Sm, Fe, La, W, and R (R is at least one selected from the group consisting of Ti, Ba, and Sr); and a step for dispersing the SmFeN-based anisotropic magnetic powder by using metal media that are covered with a resin or ceramic media that are covered with a resin. The SmFeN-based anisotropic magnetic powder contains Sm, Fe, La, W, and R (R is at least one selected from the group consisting of Ti, Ba, and Sr) and has an average particle diameter of 2.0 μm to 4.0 μm, inclusive, a remanent magnetization σr of 152 emu/g or more, and an oxygen content of 0.5% by mass or less.
Inventors:
MAEHARA HISASHI (JP)
Application Number:
PCT/JP2022/034043
Publication Date:
March 30, 2023
Filing Date:
September 12, 2022
Export Citation:
Assignee:
NICHIA CORP (JP)
International Classes:
B22F1/14; B22F1/00; B22F9/20; B22F9/24; C22C38/00; H01F1/059; H01F1/06; H01F41/02
Foreign References:
| JP2018195818A | 2018-12-06 | |||
| JP2008248238A | 2008-10-16 | |||
| JP2008097677A | 2008-04-24 | |||
| JPH0792742A | 1995-04-07 | |||
| JP2003532526A | 2003-11-05 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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