IRON POWDER, METHOD FOR PRODUCING THE SAME, MOLDED BODY FOR INDUCTOR, AND INDUCTOR

An iron powder with a small complex particle diameter is used for a molded body having a large real part μ′ of the complex relative permeability. A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained th...

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Bibliographische Detailangaben
Hauptverfasser: YAMAJI, Hidenori, GOTOH, Masahiro
Format: Patent
Sprache:eng
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Zusammenfassung:An iron powder with a small complex particle diameter is used for a molded body having a large real part μ′ of the complex relative permeability. A silane compound in an amount of from 0.1 to 0.3 in terms of Si/Fe ratio is added to a slurry containing a hydrated oxide of iron precipitate obtained through neutralization of an acidic aqueous solution containing a trivalent Fe ion with an alkali aqueous solution to coat the precipitate of the hydrated oxide of iron with a hydrolyzate of the silane compound, in which a phosphorus-containing ion in an amount of from 0.003 to 0.1 in terms of P/Fe ratio co-exists in the slurry. The hydrated oxide of iron precipitate after coating is recovered through solid-liquid separation, and then heated to provide iron particles coated with a silicon oxide. The silicon oxide coating is dissolved and removed to provide the iron powder.