MN-ZN FERRITE

PURPOSE:To provide an Mn-ferrite of high permeability and low loss suitable for high-frequency transformers by specifying the second peak in the temperature coefficient of initial permeability. CONSTITUTION:A high-density ferrite contains 62-68mol.% Fe2O3, 15-25mol.% MnO, 10-16mol.% CoO, and an addi...

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Bibliographic Details
Main Authors YUGUCHI AKIYO, TOMITA MITSURU, KAWASAKI TOSHIHARU
Format Patent
LanguageEnglish
Published 02.12.1994
Edition5
Subjects
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
CONCRETE
ELECTRICITY
INDUCTANCES
INORGANIC CHEMISTRY
LIME, MAGNESIA
MAGNETS
METALLURGY
REFRACTORIES
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
SLAG
TRANSFORMERS
TREATMENT OF NATURAL STONE
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Summary:PURPOSE:To provide an Mn-ferrite of high permeability and low loss suitable for high-frequency transformers by specifying the second peak in the temperature coefficient of initial permeability. CONSTITUTION:A high-density ferrite contains 62-68mol.% Fe2O3, 15-25mol.% MnO, 10-16mol.% CoO, and an additive including any of CaO, SiO2, ZrO2 and CoO. The ferrite has a temperature coefficient of permeability in which the second peak falls between 50 and 70 deg.C. As a result, it is possible to prevent the deterioration of initial permeability and coercive force at high frequency due to residual stresses and ambient temperature. This high-density ferrite has a high saturation flux density and a stable, high initial permeability in a high frequency region.
Bibliography:Application Number: JP19930142835