希土類焼結磁石とこれに用いる希土類焼結磁石用焼結体、及び、これらを製造するために用いることができる磁場印加装置

Japanese Patent JP7274826

B2

Provided is a rare-earth sintered magnet and the like with which a magnetic flux having a practically useful surface magnetic flux density can be generated only in one surface in a thickness direction, without increasing the size or weight of a magnetic unit. The rare-earth sintered magnet has a configuration in which a large number of magnet material particles including a rare-earth substance and each having an axis of easy magnetization have been integrally sintered. The rare-earth sintered magnet is provided with a first surface and a second surface opposing each other in the thickness direction. In a plane in parallel with a width direction and the thickness direction, the magnet material particles are magnetized such that, in a region extending from each of both end portions in the width direction toward the center portion in the width direction, the orientation direction of the easy magnetization axis is gradually changed. A maximum surface magnetic flux density in the first surface and a maximum surface magnetic flux density in the second surface satisfy the relationship (D1/D2) ℏ 4. The orientation direction of the easy magnetization axis may vary between each of both end portions in the width direction and the center portion in the width direction by 90éě 5é or 180éě 5é.

Kenichi Fujikawa
Takashi Yamamoto
Tadashi Saito
尾▲崎▼ 孝志
Katsuya Kume

JP2018089934A

May 17, 2023

May 08, 2018

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NITTO DENKO CORPORATION

H01F7/02; H01F1/057; H01F13/00; H01F41/02

JP6061036A
JP5234745A
JP6013223A
JP4018410U
JP61007609A
JP2004250781A
JP2014150254A
JP62002213U

Shinichiro Tanaka
Ken Deshimaru
Fumiaki Otsuka
Takayoshi Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Naoki Kondo
Takeo Nasu
Takuji Toyoshima

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