Barium ferrite magnetic powder and recording medium employing th

Details Barium ferrite magnetic powder and recording medium employing th Barium ferrite magnetic powder and recording medium employing th

1984-08-31

1986-04-15

Goodrow, John L.

Compositions

Magnetic

Iron-oxygen compound containing

252 6263, 423594, C04B 3536

Patent

active

045826234

ABSTRACT:
Disclosed is a barium ferrite magnetic powder comprising particles characterized by (A) a mean particle size of 0.3 .mu.m or smaller and (B) the presence of Sr, Ca and Si in respective amounts of 0.2 wt. % or less as SrO, 0.15 wt. % or less as CaO, and 0.3 wt. % or less as SiO.sub.2. Also disclosed is a recording medium comprising the barium ferrite magnetic powder.

REFERENCES:
patent: Re26153 (1967-01-01), Cochardt
patent: 3833412 (1974-09-01), Akashi et al.
patent: 3859130 (1975-01-01), Parker et al.
patent: 4025449 (1977-05-01), Pezzoli et al.
patent: 4493874 (1985-01-01), Kubo et al.
European Search Report.

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