Cobalt modified acicular .gamma. ferric oxide and process for pr

Details Cobalt modified acicular .gamma. ferric oxide and process for pr Cobalt modified acicular .gamma. ferric oxide and process for pr

1977-07-12

1978-04-25

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6255, 427128, 428483, 428539, C01G 4906, G11B 570

Patent

active

040861740

ABSTRACT:
A novel cobalt modified synthetic acicular .gamma. ferric oxide is disclosed which when incorporated with a recording binder provides a recording member which exhibits a magnetic stability coefficient of from about 4000 to about 10,000. A novel process for production of said oxide is also disclosed.

REFERENCES:
patent: 3015627 (1962-01-01), Ayers et al.
patent: 3075919 (1963-01-01), Gruber et al.
patent: 3382174 (1968-05-01), Hund
patent: 3498748 (1970-03-01), Greiner
patent: 3573980 (1971-04-01), Haller et al.
patent: 3652334 (1972-03-01), Abeck et al.
patent: 3720618 (1973-03-01), Toda et al.
patent: 3897354 (1975-07-01), Woditsch et al.
Inatsu et al., "J. Inst. T.V. Engrs. of Japan", vol. 26, No. 5 (1972) pp. 369-374.

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