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:
Oct. 09, 2012
Filed:
Sep. 22, 2009
Kentaro Mori, Chuo-ku, JP;
Takuya Aoki, Chuo-ku, JP;
Kentaro Mori, Chuo-ku, JP;
Takuya Aoki, Chuo-ku, JP;
TDK Corporation, Chuo-Ku, Tokyo, JP;
Abstract
A novel NiMnZn-based ferrite which can reduce magnetic loss (core loss) at a high frequency of about 2 MHz or higher and achieve higher saturated magnetic flux density while forming high sintered density is provided. The NiMnZn-based ferrite contains a main component comprising 54.0 to 57.5 mol % of iron oxide in terms of FeO, 2.0 to 7.0 mol % of zinc oxide in terms of ZnO, 0.5 to 4.7 mol % of nickel oxide in terms of NiO, and a remainder of manganese oxide (in terms of MnO); and an accessory component comprising 100 to 1000 ppm by weight of Si in terms of SiO, 800 to 3000 ppm by weight of Ca in terms of CaCO, and 520 to 1000 ppm by weight of Nb in terms of NbOwith respect to the main component; while having an average ferrite crystal particle size of 2.1 to 8.5 μm.