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:
Apr. 08, 2025
Filed:
Oct. 28, 2022
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Tadao Nomura, Fukui, JP;
Masayuki Kamata, Tsuruga, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
The invention provides an anisotropic rare earth sintered magnet having an NdFeB-type compound crystal as a main phase and containing Ce, and exhibiting good magnetic characteristics, and a method for producing the same. The anisotropic rare earth sintered magnet has a composition of a formula R(FeCo)BM(where R is two or more kinds of elements selected from rare earth elements and indispensably including Nd and Ce), in which the main phase is formed of an NdFeB-type compound crystal, main phase grains such that the Ce/R' ratio in the center part of the grains (where R′ is one or more kinds of elements selected from rare earth elements and indispensably including Nd) is lower than the Ce/R′ ratio in the outer shell part thereof exist, and a Ce-containing R′-rich phase and a Ce-containing R′(Fe,Co)phase exist in the grain boundary part. The production method is for producing the anisotropic rare earth sintered magnet.