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. 25, 2011
Filed:
Aug. 29, 2008
Tomoyuki Tada, Osaka, JP;
Yasuharu Miyoshi, Osaka, JP;
Takeshi Yanagihara, Shizuoka, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
The invention provides a ferrite material (ferrite sintered body, ferrite powders) having a composition formula of (1-x-y-z)(LiFe)O.xZnO.y(Mn, Fe)O.zCuO, wherein x, y, z, and a satisfy 0.175≦x≦0.29; 0.475≦y≦0.51; 0.07≦z≦0.22; and 0.02≦a≦0.055 in a case of a=Mn/(Mn+Fe). At least one of Co oxide, Co hydroxide, and Co carbonate in an amount of 1 wt. % or less on the basis of CoO may be contained in 100 wt % of the ferrite material. The ferrite material has a normalized impedance Zof 40000 Ω/m or more at 30 MHz and a normalized impedance Zof 60000 Ω/m or more at 100 MHz as well as a specific resistance of 10Ωm or more.