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:
Aug. 15, 2000
Filed:
Mar. 26, 1998
Applicant:
Inventors:
Masami Endo, Chiba, JP;
Takeo Tsukada, Chiba, JP;
Masaaki Kanasugi, Chiba, JP;
Kazuhiro Okada, Chiba, JP;
Hideharu Moro, Chiba, JP;
Norishige Yamaguchi, Chiba, JP;
Toshiaki Yamada, Saitama, JP;
Hideki Kitashima, Gunma, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75252 ; 148102 ; 148104 ; 148306 ; 252 6253 ; 252 6254 ; 252 6255 ;
Abstract
A ferromagnetic powder composition for dust cores contains a ferromagnetic metal powder and 0.1-15% by volume based on the powder of titania sol and/or zirconia sol. The composition is pressure molded and desirably annealed into a dust core which exhibits a high magnetic flux density, low coercivity, low loss and high mechanical strength.