R-T-B based permanent magnet

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United States of America Patent

PATENT NO 10068691
APP PUB NO 20150279528A1
SERIAL NO

14661722

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Abstract

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An R-T-B based permanent containing main phase grains with a composition of (R1-xYx)2T14B (R is rare earth element(s) composed of one or more elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, T is one or more transition metal elements including Fe or a combination of Fe and Co as essential elements, and 0.2≤x≤0.7), wherein the residual magnetic flux density Br is 1.1 T or more, the coercivity HcJ is 400 kA/m or less, and the ratio Hex/HcJ of the external magnetic field Hex required for obtaining a residual magnetic flux density Br of 0 to the coercivity HcJ is 1.10 or less.

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Patent Owner(s)

  • 501 TDK CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Suzuki, Kenichi Tokyo, JP 397 3612

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