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:
Sep. 20, 2022
Filed:
Feb. 22, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/11 (2006.01); C04B 35/26 (2006.01); C04B 35/64 (2006.01); H01F 1/10 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/11 (2013.01); C04B 35/2633 (2013.01); C04B 35/64 (2013.01); H01F 1/10 (2013.01); H02K 1/02 (2013.01); C04B 2235/3274 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3409 (2013.01); C04B 2235/767 (2013.01);
Abstract
Provided is a ferrite sintered magnet including a main phase formed of ferrite having a hexagonal magnetoplumbite type crystalline structure, in which the main phase contains Fe and Co, and the ferrite sintered magnet contains CaBO. CaBOis contained in a heterophase that is a crystalline phase different from the main phase, and an area ratio of CaBOto the entire cross-sectional surface of a sintered magnet, is less than or equal to 2%.