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:
May. 21, 2024
Filed:
Nov. 01, 2022
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Nichia Corporation, Anan, JP;
Masaaki Ito, Anjo, JP;
Motoki Hiraoka, Toyota, JP;
Reimi Tabuchi, Nisshin, JP;
Hisashi Maehara, Itano-gun, JP;
Masanori Okanan, Anan, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
The present invention is a method for producing a rare earth magnet, including preparing a magnetic powder and a modifier powder, mixing them to obtain a mixed powder, compression-molding the mixed powder in a magnetic field to obtain a magnetic-field molded body, and pressure-sintering the magnetic-field molded body to obtain a sintered body, wherein the magnetic powder includes a first particle group and a second particle group, the Dvalues of the first particle group and the second particle group are denoted by dμm and dμm, respectively, dand dsatisfy the relationship of 0.350≤d/d≤0.500, and the ratio between the total volume of the first particle group and the total volume of the second particle group is from 9:1 to 4:1; and a rare earth magnet obtained by the production method.