R-T-B based sintered magnet

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United States of America Patent

PATENT NO 10388443
APP PUB NO 20160225501A1
SERIAL NO

15015462

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention provides an R-T-B based sintered magnet having an R-T-B based compound as main phase grains, wherein, the content of Zr contained in the R-T-B based sintered magnet is 0.3 mass % to 2.0 mass %, the main phase grains have Zr, and the R-T-B based sintered magnet have main phase grains with the mass concentration of Zr at the edge portion of the main phase grain being 70% or less of that at the central portion of the main phase grain at the cross-section of the main phase grain.

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Patent Owner(s)

  • 501 TDK CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iwasa, Takurou Tokyo, JP 6 14
Miwa, Masashi Tokyo, JP 43 165
Nakajima, Haruna Tokyo, JP 8 35

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