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:
Dec. 06, 2016
Filed:
Feb. 13, 2013
Tdk Corporation, Tokyo, JP;
Masashi Miwa, Tokyo, JP;
Haruna Nakajima, Tokyo, JP;
Ken-ichi Nishikawa, Tokyo, JP;
Tetsuya Hidaka, Tokyo, JP;
Jun Hagiwara, Tokyo, JP;
Chikara Ishizaka, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
The present invention provides an R-T-B based sintered magnet including RTB crystal grains wherein; a grain boundary is formed by two or more adjacent RTB crystal grains, an R—O—C concentrated part, in which concentrations of R, O and C are higher than those in the RTB crystal grains respectively, is in the grain boundary, and an area of the R—O—C concentrated part occupying in that of the grain boundary on a cut surface of the R-T-B based sintered magnet is within a range of 10% or more to 75% or less.