Iron oxide magnetic powder and magnetic recording medium using t

Details Iron oxide magnetic powder and magnetic recording medium using t Iron oxide magnetic powder and magnetic recording medium using t

1998-07-31

1999-11-23

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428694BA, 428900, G11B 5706

Patent

active

059897031

ABSTRACT:
Iron oxide magnetic powder having small crystallite size and a small specific surface area, a manufacturing method therefor and a magnetic recording medium having excellent surface characteristics and satisfactory electromagnetic conversion characteristics are provided. The iron oxide magnetic powder contains crystallite having size of 30 nm or less when measured by an X-ray diffraction method and has a specific surface area of 30 m.sup.2 /g or less when measured by a BET method, and a magnetic recording medium using the iron oxide magnetic powder as the magnetic member thereof are provided.

REFERENCES:
patent: 5178935 (1993-01-01), Saito et al.
patent: 5202043 (1993-04-01), Wiese et al.
patent: 5609789 (1997-03-01), Asano et al.

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