Title:
MANUFACTURING METHOD FOR SmFeN-BASED ANISOTROPIC MAGNETIC POWDER AND SmFeN-BASED ANISOTROPIC MAGNETIC POWDER
Document Type and Number:
Japanese Patent JP2022189752
Kind Code:
A
Abstract:
To provide an SmFeN-based anisotropic magnetic powder which is improved in magnetic characteristics and of which the oxygen content is reduced, and a manufacturing method therefor.SOLUTION: The present invention relates to a manufacturing method for an SmFeN-based anisotropic magnetic powder including the steps of: preparing a pre-dispersion SmFeN-based anisotropic magnetic powder containing Sm, Fe, W and N; and dispersing the pre-dispersion SmFeN-based anisotropic magnetic powder using resin-coated metal media or resin-coated ceramic media. The present invention also relates to an SmFeN-based anisotropic magnetic powder which contains Sm, Fe, W and N and of which the average particle diameter is smaller than 2.5 μm, residual magnetization σr is equal to or more than 130 emu/g and the oxygen content is equal to or less than 0.75 mass%.SELECTED DRAWING: Figure 1
Inventors:
MAEHARA HISASHI
Application Number:
JP2022088565A
Publication Date:
December 22, 2022
Filing Date:
May 31, 2022
Export Citation:
Assignee:
NICHIA KAGAKU KOGYO KK
International Classes:
H01F41/02; B22F1/05; B22F1/14; B22F9/20; H01F1/059; H01F1/06
Attorney, Agent or Firm:
Patent Attorney Firm WisePlus