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:
May. 16, 2023
Filed:
Oct. 01, 2018
Applicant:
Sony Corporation, Tokyo, JP;
Inventor:
Kenji Katori, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/706 (2006.01); H01F 1/11 (2006.01); C01G 49/00 (2006.01); H01F 1/36 (2006.01);
U.S. Cl.
CPC ...
G11B 5/70678 (2013.01); C01G 49/009 (2013.01); H01F 1/11 (2013.01); H01F 1/36 (2013.01);
Abstract
To provide a spinel ferrite magnetic powder having excellent characteristics. A method for manufacturing a magnetic powder includes: melting and then quenching a glass-forming component and a spinel ferrite magnetic powder-forming component to manufacture an amorphous body; and heat-treating the amorphous body to precipitate a spinel ferrite magnetic powder. An oxygen partial pressure during the heat treatment is 1.0 kPa or less.