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Title:
SINTERED MAGNET
Document Type and Number:
WIPO Patent Application WO/2013/191276
Kind Code:
A1
Abstract:
A sintered magnet of a preferred embodiment is formed from 29.5 to 33.0 mass% of R (where R is rare earth elements that always include either Nd or Pr), 0.7 to 0.95 mass% of B, 0.03 to 0.6 mass% of Al, 0.01 to 1.5 mass% of Cu, 3.0 mass% or less (but not 0 mass%) of Co, 0.1 to 1.0 mass% of Ga, 0.05 to 0.3 mass% of C, 0.03 to 0.4 mass% of O, and Fe and other elements as the balance; has a composition wherein the heavy rare earth element content is a total of 1.0 mass% or less; and when the number of atoms of Nd, Pr, B, C, and Ga is [Nd], [Pr], [B], [C], and [Ga], respectively, the following relations are satisfied: 0.29 < [B]/([Nd] + [Pr]) < 0.40 and 0.07 < ([Ga] + [C])/[B] < 0.60.

Inventors:
MIWA MASASHI (JP)
FUJIWARA ATSUSHI (JP)
KATO EIJI (JP)
TSUBOKURA TAEKO (JP)
MITAKE KOJI (JP)
ISHIZAKA CHIKARA (JP)
Application Number:
PCT/JP2013/067092
Publication Date:
December 27, 2013
Filing Date:
June 21, 2013
Export Citation:
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Assignee:
TDK CORP (JP)
International Classes:
H01F1/057; C22C38/00; H01F1/08; B22F9/04; C22C33/02
Domestic Patent References:
WO2009150843A12009-12-17
Foreign References:
JP2009260338A2009-11-05
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
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