R-T-B based sintered magnet

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United States of America Patent

PATENT NO 10755840
APP PUB NO 20180294082A1
SERIAL NO

15967893

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Abstract

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An R-T-B based sintered magnet includes “R”, “T”, and “B”. “R” represents a rare earth element. “T” represents a metal element other than rare earth elements including at least Fe, Cu, Mn, Al, Co, Ga, and Zr. “B” represents boron or boron and carbon. With respect to 100 mass % of a total mass of the R-T-B based sintered magnet, a content of “R” is 28.0 to 31.5 mass %, a content of Cu is 0.04 to 0.50 mass %, a content of Mn is 0.02 to 0.10 mass %, a content of Al is 0.15 to 0.30 mass %, a content of Co is 0.50 to 3.0 mass %, a content of Ga is 0.08 to 0.30 mass %, a content of Zr is 0.10 to 0.25 mass %, and a content of “B” is 0.85 to 1.0 mass %.

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Patent Owner(s)

Patent OwnerAddress
TDK CORPORATIONTOKYO 103-6128

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayakawa, Takuma Tokyo, JP 17 45
Hidaka, Tetsuya Tokyo, JP 30 148
Iwasaki, Makoto Tokyo, JP 106 559
Kakoki, Ayato Tokyo, JP 7 8

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