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. 19, 2022
Filed:
Mar. 13, 2020
Tdk Corporation, Tokyo, JP;
Hikaru Kudo, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A permanent magnet includes Nd, Fe, B, and Ga and contains a first T rich phase, a second T rich phase, and a T poor phaseas grain boundary phases, the first T rich phasesatisfies 1.7≤[T]/[R]≤3.0, the second T rich phasesatisfies 0.8≤[T]/[R]≤1.5, the T poor phasesatisfies 0.0≤[T]/[R]≤0.6, and the following Formulas 4 and 5 are satisfied. [T] represents the concentration (atom %) of Fe and Co, [R] represents the concentration (atom %) of Nd, Pr, Tb, and Dy, Srepresents the area of the first T rich phaseexposed at a cross-section of the permanent magnet, Srepresents the area of the second T rich phaseexposed at the cross-section, and Srepresents the area of the T poor phaseexposed at the cross-section.0.30≤(1+2)/(1+2+3)≤0.80  (4)0.20≤2/(1+2)≤0.80  (5)