Tdk Corporation

Hitoshi Maro

Satoshi Tanaka

Hideki Sasaki

Makoto Iwasaki

Yousuke Miyaki

Fumitaka Baba

Takahide Kurahashi

Seiichi Endo

Daisuke Nakazato

Keiichi Morimoto

In the rare earth sintered magnet, the ratio of R2 to the sum of R1 and R2 that are contained in crystal grain boundaries surrounding the crystal grains in the rare earth sintered magnet body is higher than the ratio of R2 to the sum of R1 and R2 in the crystal grains, and the concentration of R2 increases from the central portion of the rare earth sintered magnet body toward the surface of the rare earth sintered magnet body. In addition, the degree of unevenness in residual magnetic flux density on the surface of the rare earth sintered magnet body is smaller than 3.0%.

Rare earth sintered magnet and motor

Method of producing an electrode

Growing community of inventors

Tokyo, Japan

Hitoshi Maro