Preparation of finely divided and acicular hexagonal ferrites an

Details Preparation of finely divided and acicular hexagonal ferrites an Preparation of finely divided and acicular hexagonal ferrites an

1986-05-20

1988-08-16

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6259, 252 6263, C04B 3526

Patent

active

047643005

ABSTRACT:
A process for the preparation of finely divided and acicular hexagonal ferrites of the general formula AMe.sub.x Fe.sub.12-x O.sub.19, where x is .ltoreq.4, A is barium and/or strontium and Me is indium or equimolar amounts of zinc or cobalt and titanium, and their use for the production of magnetic recording media and plastoferrites.

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patent: 3723587 (1973-03-01), Iwase et al.
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patent: 4042516 (1977-08-01), Matsumoto et al.
H. Kojima and K. Haneda, Ferrites: Proceedings of the International Conference, Jul. 1970 (Pub. 1971) S. 380-382.
T. Takada et al. Ferrites: Proceedings of the International Conference Jul. 1979, Japan, S. 275-278.
L. Giarda et al., Journal de Physique, Colloque C 1, Supl. 4, 38.

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