Ferrite material and method for producing ferrite material

Details Ferrite material and method for producing ferrite material Ferrite material and method for producing ferrite material

2008-08-29

2011-10-25

Koslow, Carol M (Department: 1734)

Compositions

Magnetic

Iron-oxygen compound containing

C252S062600, C252S062620

Reexamination Certificate

active

08043522

ABSTRACT:
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 ZNof 40000 Ω/m or more at 30 MHz and a normalized impedance ZNof 60000 Ω/m or more at 100 MHz as well as a specific resistance of 106Ωm or more.

REFERENCES:
patent: 2004-153197 (2004-05-01), None
patent: 2007-076964 (2007-03-01), None

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