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:
Feb. 04, 2025
Filed:
Dec. 01, 2021
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Nichia Corporation, Anan, JP;
Masaaki Ito, Anjo, JP;
Daisuke Ichigozaki, Toyota, JP;
Noritsugu Sakuma, Mishima, JP;
Akihito Kinoshita, Mishima, JP;
Michiya Kume, Anan, JP;
Hisashi Maehara, Itano-gun, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
A rare-earth magnet and a method of manufacturing the same are provided. The method includes: preparing Sm—Fe—N magnetic powder; preparing reforming material powder containing metallic zinc; mixing the magnetic powder and the reforming material powder to obtain mixed powder; subjecting the mixed powder to compression molding in a magnetic field to obtain a magnetic-field molded body; subjecting the magnetic-field molded body to pressure sintering to obtain a sintered body; and subjecting the sintered body to heat treatment. A content proportion of the metallic zinc in the reforming material powder is 10 to 30% by mass with respect to the mixed powder. When a temperature and time in conditions for the heat treatment are defined as x° C. and y hours, respectively, the formulas y≥−0.32x+136 and 350≤x≤410 are met.