Ferromagnetic powder for magnetic recording medium and...

Details Ferromagnetic powder for magnetic recording medium and... Ferromagnetic powder for magnetic recording medium and...

G - Physics

11

B

31/106

G11B 5/00 (2006.01) H01F 1/06 (2006.01)

Patent

CA 1046264

ABSTRACT OF THE DISCLOSURE A ferromagnetic powder which contains at least Fe-B or Fe-Co-B with the surface of the powder having thereon a layer of Cr of a layer mainly consisting of Cr and a method of preparing the ferromagnetic powder comprising reducing a metal salt capable of forming a ferromagnetic powder containing at least Fe or Fe-Co in an aqueous solution thereof with one or more borohydride compounds or derivatives thereof and after the reduction is initiated adding an aqueous solution containing Cr ion or an anion containing Cr.

206956

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