The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2022
Filed:
Jun. 20, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Tohoku University, Sendai, JP;
Noritsugu Sakuma, Mishima, JP;
Tetsuya Shoji, Susono, JP;
Kazuaki Haga, Toyota, JP;
Satoshi Sugimoto, Sendai, JP;
Masashi Matsuura, Sendai, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
TOHOKU UNIVERSITY, Sendai, JP;
Abstract
To provide a rare earth magnet having excellent coercive force and a production method thereof. A rare earth magnet, wherein the rare earth magnet comprises a magnetic phase containing Sm, Fe, and N, a Zn phase present around the magnetic phase, and an intermediate phase present between the magnetic phase and the Zn phase, wherein the intermediate phase contains Zn and the oxygen content of the intermediate phase is higher than the oxygen content of the Zn phase; and a method for producing a rare earth magnet, including mixing a magnetic raw material powder having an oxygen content of 1.0 mass % or less and an improving agent powder containing metallic Zn and/or a Zn alloy, and heat-treating the mixed powder.