Title:
SINTERED BODY FOR FORMING RARE EARTH MAGNET, AND RARE EARTH SINTERED MAGNET
Document Type and Number:
WIPO Patent Application WO/2017/022685
Kind Code:
A1
Abstract:
A sintered body for forming a rare earth magnet is provided which is configured so as to maintain within a prescribed range the deviation in the orientation angle between a magnetic material particle orientation axis angle and the easy magnetization axis of magnet material particles in an arbitrary very small area in a magnet cross section; also provided is a rare earth sintered magnet. This sintered body for forming a rare earth magnet has a three-dimensional shape that has a length dimension in the length direction, a thickness dimension in the thickness direction between a first surface and a second surface, in a cross section in the horizontal direction perpendicular to said length direction, and a width dimension in the width direction perpendicular to said thickness direction. The angle of orientation angle variation, which is determined on the basis of the differences of the orientation angles between an orientation axis angle and the easy magnetization axis of each of the magnet material particles, is 9.0° or less. The orientation axis angle is defined as the most frequently occurring of the orientation angles between a preconfigured reference line and the easy magnetization axis of each of the multiple magnet material particles in a quadrilateral area at an arbitrary position in a plane that includes the thickness direction and the width direction. In one embodiment, said area is defined as a quadrilateral area that includes 30 or more, e.g. 200 or 300, magnet material particles. The quadrilateral area is preferably square. In another embodiment, the area is defined as a square area with the one side being 35μm.
Inventors:
FUJIKAWA KENICHI (JP)
OZEKI IZUMI (JP)
KATO YUKI (JP)
FUJIHARA MAKOTO (JP)
KUME KATSUYA (JP)
OZEKI IZUMI (JP)
KATO YUKI (JP)
FUJIHARA MAKOTO (JP)
KUME KATSUYA (JP)
Application Number:
PCT/JP2016/072393
Publication Date:
February 09, 2017
Filing Date:
July 29, 2016
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
H01F1/08; B22F3/00; B22F3/10; C22C38/00; H01F1/055; H01F7/02
Domestic Patent References:
| WO2015015586A1 | 2015-02-05 |
Foreign References:
| JP2015094014A | 2015-05-18 | |||
| JPH08167515A | 1996-06-25 |
Attorney, Agent or Firm:
NISHIJIMA Takaki et al. (JP)
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