Title:
PERMANENT MAGNET MATERIAL
Document Type and Number:
WIPO Patent Application WO/2015/015586
Kind Code:
A1
Abstract:
In rare-earth permanent magnets, it is difficult to achieve both high magnetization and high retentivity. The present invention provides a rare-earth magnet material in which reduction in coercivity is minimized while maintaining high magnetization by varying the thickness of a nonmagnetic phase formed on the surface of each main-phase crystal grain depending on the position of the crystal grain surface, and thereby minimizing the amount of the nonmagnetic phase while minimizing reduction in coercivity.
Inventors:
USHIO JIRO (JP)
YAMAMOTO HIROYUKI (JP)
KITAGAWA ISAO (JP)
YAMAMOTO HIROYUKI (JP)
KITAGAWA ISAO (JP)
Application Number:
PCT/JP2013/070692
Publication Date:
February 05, 2015
Filing Date:
July 31, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01F1/055; H01F1/08; H01F41/02
Domestic Patent References:
| WO2005105343A1 | 2005-11-10 |
Foreign References:
| JP2004327930A | 2004-11-18 | |||
| JP2011211106A | 2011-10-20 | |||
| JP2013069738A | 2013-04-18 | |||
| JPH0613219A | 1994-01-21 | |||
| JPH08250312A | 1996-09-27 |
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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