Secondary particles for anisotropic magnetic powder

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United States of America Patent

PATENT NO 11685654
APP PUB NO 20220041447A1
SERIAL NO

17450451

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Abstract

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Provided are a method of producing a titanium-containing rare earth-iron-nitrogen anisotropic magnetic powder having good magnetic properties, and secondary particles for a titanium-containing anisotropic magnetic powder. The method includes: obtaining a first precipitate containing R, iron, and titanium by mixing a first precipitating agent with a solution containing R, iron, and titanium, wherein R is at least one selected from Sc, Y, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu; obtaining a second precipitate containing R and iron by mixing, in the presence of the first precipitate, a second precipitating agent with a solution containing R and iron; obtaining an oxide containing R, iron, and titanium by calcining the second precipitate; obtaining a partial oxide by heat treating the oxide in a reducing gas atmosphere; obtaining alloy particles by reducing the partial oxide; and obtaining an anisotropic magnetic powder by nitriding the alloy particles.

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Patent Owner(s)

Patent OwnerAddress
NICHIA CORPORATIONANAN-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Maehara, Hisashi Anan, JP 20 11

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