Title:
ANISOTROPIC RARE EARTH SINTERED MAGNET AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2023070057
Kind Code:
A
Abstract:
To provide an anisotropic rare earth sintered magnet indicating excellent magnetic characteristics in the anisotropic rare earth sintered magnet defining a compound of an Nd2Fe14B type crystal as a main phase and containing Ce, and a manufacturing method thereof.SOLUTION: The present invention relates to an anisotropic rare earth sintered magnet and a composition of the anisotropic rare earth sintered magnet is expressed by a formula Rx(Fe1-aCoa)100-x-y-zByMz (R is two or more kinds of elements selected from rare earth elements and essentially containing Nd and Ce). In the anisotropic rare earth sintered magnet, a main phase consists of a compound of an Nd2Fe14B type crystal. A main phase particle 10 exists in which a Ce/R' ratio (R' is one or more kinds of elements selected from rare earth elements and essentially containing Nd) in a central part of the particle is lower than a Ce/R' ratio in an outer shell part of the particle, and an R' rich phase and an R'(Fe, Co)2 phase containing Ce exist in a particle boundary part 20. The present invention also relates to a manufacturing method of the anisotropic rare earth sintered magnet.SELECTED DRAWING: Figure 1
Inventors:
NOMURA TADAO
KAMADA MASAYUKI
KAMADA MASAYUKI
Application Number:
JP2022141632A
Publication Date:
May 18, 2023
Filing Date:
September 06, 2022
Export Citation:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
H01F1/057; B22F3/00; B22F3/24; C22C33/02; C22C38/00; H01F41/02
Attorney, Agent or Firm:
Masahiro Taguchi
Takashi Ito
Yasuyoshi Suzuki
Takashi Ito
Yasuyoshi Suzuki
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