Rare earth magnet and production method thereof

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United States of America Patent

PATENT NO 11990260
APP PUB NO 20230139716A1
SERIAL NO

17978688

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Abstract

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The present invention is a method for producing a rare earth magnet, including preparing a magnetic powder and a modifier powder, mixing them to obtain a mixed powder, compression-molding the mixed powder in a magnetic field to obtain a magnetic-field molded body, and pressure-sintering the magnetic-field molded body to obtain a sintered body, wherein the magnetic powder includes a first particle group and a second particle group, the D50 values of the first particle group and the second particle group are denoted by d1 μm and d2 μm, respectively, d1 and d2 satisfy the relationship of 0.350≤d2/d1≤0.500, and the ratio between the total volume of the first particle group and the total volume of the second particle group is from 9:1 to 4:1; and a rare earth magnet obtained by the production method.

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Patent Owner(s)

Patent OwnerAddress
TOYOTA JIDOSHA KABUSHIKI KAISHATOYOTA-SHI AICHI-KEN 471-8571
NICHIA CORPORATIONTOKUSHIMA 774-8601

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiraoka, Motoki Toyota, JP 39 147
Ito, Masaaki Anjo, JP 191 1408
Maehara, Hisashi Itano-gun, JP 20 11
Okanan, Masanori Anan, JP 1 0
Tabuchi, Reimi Nisshin, JP 4 0

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