SYNTHESIS METHOD OF BARIUM FERITE AND ZINC FERITE NANOCOMPOSITE POWDERS

A method for preparing nanocomposite powder is provided to produce the nanocomposite powder usable as a permanent magnet material having high-efficiency magnetic characteristics by an exchange spring effect between hard magnetic barium ferrite and soft magnetic nickel zinc ferrite. A method for prep...

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Main Authors JANG, EUE SOON, KONG, KYUNG TAE, CHAE, ZOO HYUN, CHOI, BONG KEUN, RO, JU YOUNG, CHOI, EUN JEONG, AHN, CHE HONG
Format Patent
LanguageEnglish
Published 19.06.2008
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:A method for preparing nanocomposite powder is provided to produce the nanocomposite powder usable as a permanent magnet material having high-efficiency magnetic characteristics by an exchange spring effect between hard magnetic barium ferrite and soft magnetic nickel zinc ferrite. A method for preparing nanocomposite powder comprising barium ferrite and nickel zinc ferrite includes the steps of: (i) dissolving barium nitrate, nickel nitrate, zinc nitrate, and iron nitrate in distilled water; (ii) adding glycine to the solution to form a precursor powder by self-propagating high temperature synthesis; and (iii) calcining the precursor powder at 800 °C or below. The glycine is added in an amount of 1:0.5-1:1.5 based on the total weight of nitrates.
Bibliography:Application Number: KR20060128878