Tdk Corporation

Atsushi Fujiwara

Eiji Kato

Chikara Ishizaka

Masashi Miwa

Taeko Tsubokura

Takuma Hayakawa

Koji Mitake

Tetsuya Chiba

Ryota Kunieda

A sintered magnet of a preferred embodiment has a composition comprising: R (R is a rare earth element that must contain any one of Nd and Pr.): 29.5 to 33.0 mass %; B: 0.7 to 0.95 mass %; Al: 0.03 to 0.6 mass %; Cu: 0.01 to 1.5 mass %; Co: 3.0 mass % or less (provided that 0 mass % is not included.); Ga: 0.1 to 1.0 mass %; C: 0.05 to 0.3 mass %; O: 0.03 to 0.4 mass %; and Fe and other elements: a balance, and wherein a content of heavy rare earth elements in total is 1.0 mass % or less, and wherein the following relations are satisfied: 0.29&#x3c;[B]/([Nd]+[Pr])&#x3c;0.40 and 0.07&#x3c;([Ga]+[C])/[B]&#x3c;0.60, where [Nd], [Pr], [B], [C] and [Ga] represent the numbers of atoms of Nd, Pr, B, C and Ga, respectively.

Sintered magnet

Growing community of inventors

Tokyo, Japan

Atsushi Fujiwara