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:
Aug. 20, 2019
Filed:
Nov. 04, 2016
Tdk Corporation, Tokyo, JP;
Atsushi Tada, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An R-T-B based sintered magnet includes RTB crystal grains. A grain boundary formed by the two or more adjacent RTB crystal grains includes an R—N—O—C concentrated part having higher concentrations of 'R', N, O, and C than those in the RTB crystal grains. 'R' of the R—N—O—C concentrated part includes Y. A ratio of Y atom to 'R' atom in the R—N—O—C concentrated part is 0.65 or more and 1.00 or less. A ratio of O atom to “R” atom in the R—N—O—C concentrated part is more than 0 and 0.20 or less. A ratio of N atom to “R” atom in the R—N—O—C concentrated part is 0.03 or more and 0.15 or less.