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. 31, 2023
Filed:
May. 19, 2017
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Junnichi Nagaoka, Tokyo, JP;
Hitoshi Taguchi, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/11 (2006.01); H01F 1/03 (2006.01); C01G 49/00 (2006.01); C01G 51/00 (2006.01); C04B 35/26 (2006.01); H01F 1/10 (2006.01); C04B 35/626 (2006.01);
U.S. Cl.
CPC ...
H01F 1/11 (2013.01); C01G 49/0018 (2013.01); C01G 49/0054 (2013.01); C01G 51/68 (2013.01); C04B 35/26 (2013.01); C04B 35/2641 (2013.01); C04B 35/62645 (2013.01); H01F 1/0315 (2013.01); H01F 1/10 (2013.01); C01P 2002/54 (2013.01); C01P 2006/42 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3213 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/3296 (2013.01); C04B 2235/3298 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/604 (2013.01); C04B 2235/605 (2013.01); C04B 2235/6562 (2013.01);
Abstract
This ferrite magnet has a magnetoplumbite structure and is characterized in that, when representing the composition ratios of the total of each metal element A, R, Fe and Me with expression (1) AR(FeMe), the Fecontent (m) in the ferrite magnet is greater than 0.1 mass % and less than 5.4 mass % (in expression (1), A is at least one element selected from Sr, Ba, Ca and Pb; R is at least one element selected from the rare-earth elements (including Y) and Bi, and includes at least La, and Me is Co, or Co and Zn). The invention makes it possible to achieve a ferrite magnet with increased Br.