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)
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:
Assignee:
TDK CORP (JP)
International Classes:
H01F1/057; C22C38/00; H01F1/08; B22F9/04; C22C33/02
Domestic Patent References:
WO2009150843A1 | 2009-12-17 |
Foreign References:
JP2009260338A | 2009-11-05 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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