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. 18, 2017
Filed:
Mar. 04, 2015
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Yoshitaka Murakawa, Tokyo, JP;
Naoharu Tanigawa, Tokyo, JP;
Yoshihiko Minachi, Tokyo, JP;
Hitoshi Taguchi, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/11 (2006.01); H01F 1/03 (2006.01); H02K 1/02 (2006.01); C04B 35/26 (2006.01); C04B 35/626 (2006.01); C01G 49/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0315 (2013.01); C01G 49/0072 (2013.01); C04B 35/26 (2013.01); C04B 35/62685 (2013.01); H01F 1/11 (2013.01); H02K 1/02 (2013.01); C01P 2002/50 (2013.01); C01P 2002/52 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/42 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3213 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/605 (2013.01); C04B 2235/72 (2013.01); C04B 2235/767 (2013.01); C04B 2235/785 (2013.01); C04B 2235/96 (2013.01);
Abstract
A sintered ferrite magnet comprises a main phase of an M type Sr ferrite having a hexagonal crystal structure. An amount of Zn is 0.05 to 1.35 mass % in terms of ZnO and M/Mis 0.43 or less when an amount of a rare-earth element (R) is Min terms of mol and the amount of Zn is Min terms of mol.