Magnetic powder containing Sm—Fe—N-based crystal particles, sintered magnet produced from same, method for producing said magnetic powder, and method for producing said sintered magnet

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United States of America Patent

PATENT NO 11594353
APP PUB NO 20190333661A1
SERIAL NO

16505287

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Abstract

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A sintered magnet contains Sm—Fe—N-based crystal grains and has high coercivity; and a magnetic powder is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet comprises a crystal phase composed of a plurality of Sm—Fe—N-based crystal grains and a nonmagnetic metal phase present between the Sm—Fe—N crystal grains adjacent to each other, wherein a ratio of Fe peak intensity IFe to SmFeN peak intensity ISmFeN measured by an X-ray diffraction method is 0.2 or less. A magnetic powder comprises Sm—Fe—N-based crystal particles and a nonmagnetic metal layer covering surfaces of the Sm—Fe—N crystal particles.

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Patent Owner(s)

Patent OwnerAddress
MURATA MANUFACTURING CO LTDKYOTO JAPAN
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYTOKYO TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sakaguchi, Kenji Nagaokakyo, JP 20 416
Takagi, Kenta Nagoya, JP 16 14
Yamaguchi, Wataru Nagoya, JP 79 330
Yokoyama, Takaaki Nagaokakyo, JP 11 103
Yokoyama, Yuji Nagaokakyo, JP 71 536
Yoshii, Kazuhiro Nagaokakyo, JP 31 148

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