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:
Nov. 21, 2023
Filed:
Sep. 17, 2021
Proterial, Ltd., Tokyo, JP;
Futoshi Kuniyoshi, Tokyo, JP;
PROTERIAL, LTD., Tokyo, JP;
Abstract
The present disclosure includes a main phase comprising an RTB compound, and a grain boundary phase. The atom number ratio of B to T in this R-T-B sintered magnet is less than the atom number ratio of B to T in the stoichiometric composition of the RTB compound, and the relationships 26.0 mass %≤([Nd]+[Pr]+[Ce]+[Dy]+[Tb])−(9×[O]+12×[C])≤27.5 mass %, 0.15 mass %≤[O]≤0.30 mass %, and 0.05 mass %<[Tb]≤0.35 mass % are satisfied, where [Nd] is the Nd content (mass %), [Pr] is the Pr content (mass %), [Ce] is the Ce content (mass %), [Dy] is the Dy content (mass %), [O] is the O content (mass %), and [C] is the C content (mass %). Tb concentration and/or the Dy concentration gradually decreases from the magnet surface toward the magnet interior, at least in part.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile