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. 25, 2023
Filed:
Mar. 11, 2021
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Shogo Muroya, Tokyo, JP;
Yoshitaka Murakawa, Tokyo, JP;
Hiroyuki Morita, Tokyo, JP;
Masanori Ikeda, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/34 (2006.01); H02K 1/02 (2006.01); C01G 51/00 (2006.01); H01F 1/10 (2006.01); C04B 35/26 (2006.01);
U.S. Cl.
CPC ...
H01F 1/344 (2013.01); C01G 51/70 (2013.01); C04B 35/2633 (2013.01); H01F 1/10 (2013.01); H02K 1/02 (2013.01); C01P 2002/52 (2013.01); C01P 2002/76 (2013.01); C01P 2006/42 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/767 (2013.01);
Abstract
To provide a ferrite sintered magnet having a high residual magnetic flux density (Br) and a high coercive force (HcJ), and also able to produce at a low cost. The ferrite sintered magnet includes a hexagonal M-type ferrite including A, R, Fe, and Co in an atomic ratio of AR(FeCo)O. A is at least one selected from Sr, Ba, and Pb. R is La only or La and at least one selected from rare earth elements. 0.13≤x≤0.23, 10.80≤(12−y)z≤12.10, and 0.13≤yz≤0.20 are satisfied.