METHOD OF MANUFACTURING ANISOTROPIC MAGNET POWDER, MATERIAL POWDER OF ANISOTROPIC MAGNET POWDER, AND BONDED MAGNET

Japanese Patent JP3452254

B2

PROBLEM TO BE SOLVED: To provide a method of manufacturing anisotropic magnet powder, which is capable of obtaining a bonded magnet that has a superior permanent demagnetization factor.
SOLUTION: RFeB material (R: rear earth element) is subjected to a low- temperature hydrogenation process, a high-temperature hydrogenation process, and a first exhaust process, through which RFeBHX powder as hydrogenated matter is manufactured, diffusion powder formed of hydrogenated dysprosium is mixed into RFeBHX powder (material powder of anisotropic magnet powder) as the starting material; and the mixture is subjected to a diffusion thermal process and a dehydrogenation process, by which anisotropic magnet powder having high coercive force and superior in anisotropic properties can be obtained. A bonded magnet, formed of the above anisotropic magnet powder, has a superior permanent demagnetization factor.

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JP3237053	RARE EARTH MAGNET MATERIAL POWDER HAVING SUPERIOR MAGNETIC CHARACTERISTICS AND MANUFACTURE THEREOF

Yoshinobu Honzo
Norihiko Hamada
Chisato Mishima

JP2000285679A

September 29, 2003

September 20, 2000

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Aichi Steel Co., Ltd.

H01F1/06; H01F1/053; H01F1/057; H01F41/02; (IPC1-7): H01F1/06; H01F1/053; H01F41/02

JP200096102A
JP6120015A
JP9165601A
JP10326705A
JP7245206A
JP5209210A
JP778710A

Hiroshi Ohkawa

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