Mn-Zn based ferrite, magnetic core for transformer and...

Details Mn-Zn based ferrite, magnetic core for transformer and... Mn-Zn based ferrite, magnetic core for transformer and...

2005-09-06

2005-09-06

Donovan, Lincoln (Department: 2832)

Inductor devices

Core forms casing

C336S233000, C336S232000, C252S062590, C252S062620, C252S062600, C423S594120

Reexamination Certificate

active

06940381

ABSTRACT:
A Mn—Zn based ferrite having a main component comprised of 51 to 54 mol % of an iron oxide in Fe2O3conversion, 14 to 21 mol % of a zinc oxide in ZnO conversion and the rest of a manganese oxide, wherein a content (α [ppm]) of cobalt oxide in a CoO conversion with respect to 100 wt % of the main component satisfies a relation formula below.in-line-formulae description="In-line Formulae" end="lead"?Relation formula: Y1≦α≦Y2  (1)in-line-formulae description="In-line Formulae" end="tail"?Note that Y1 and Y2 are expressed by the formulas below and CoO>0 [ppm].in-line-formulae description="In-line Formulae" end="lead"?Y1=(−0.13·B2+1.5·B−15.6A+850)/(0.0003·B+0.0098)−233  (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Y2=(−0.40·B2+4.6·B−46.7A+2546)/(0.0003·B+0.0098)+1074  (3)in-line-formulae description="In-line Formulae" end="tail"?The A and B in the above Y1 and Y2 are A=Fe2O3(mol %) and B=ZnO (mol %).

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