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:
Jan. 17, 2023
Filed:
Mar. 20, 2020
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Yoshitaka Murakawa, Tokyo, JP;
Shogo Muroya, Tokyo, JP;
Hiroyuki Morita, Tokyo, JP;
Masanori Ikeda, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/11 (2006.01); C04B 35/26 (2006.01); H01F 1/10 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/11 (2013.01); C04B 35/26 (2013.01); C04B 35/2641 (2013.01); H01F 1/10 (2013.01); C01P 2006/42 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/3274 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/3409 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/405 (2013.01); C04B 2235/767 (2013.01); C04B 2235/96 (2013.01); H02K 1/02 (2013.01);
Abstract
A ferrite sintered magnet comprising an M type Sr ferrite having a hexagonal structure as a main phase, wherein the ferrite sintered magnet comprises La and Co, a content of B is 0.005 to 0.9% by mass in terms of BO, a content of Zn is 0.01 to 1.2% by mass in terms of ZnO, and the ferrite sintered magnet satisfies [La]/[Zn]≤0.79 and [Co]/[Zn]≤0.67 when an atomic concentration of La is represented by [La], an atomic concentration of Co is represented by [Co], and an atomic concentration of Zn is represented by [Zn].