| 摘要 |
The invention provides a ferrite material (ferrite sintered body, ferrite powders) having a composition formula of (1-x-y-z)(Li0.5Fe0.5)O.xZnO.y(Mn, Fe)2O3.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 ZN of 40000 &OHgr;/m or more at 30 MHz and a normalized impedance ZN of 60000 &OHgr;/m or more at 100 MHz as well as a specific resistance of 106 &OHgr;m or more.
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