Preparation of acicular .alpha.-Fe.sub.2 O.sub.3

Details Preparation of acicular .alpha.-Fe.sub.2 O.sub.3 Preparation of acicular .alpha.-Fe.sub.2 O.sub.3

1989-02-24

1990-04-03

Stoll, Robert L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423594, 423618, 252 6256, 252 6259, C01G 4906

Patent

active

049138901

ABSTRACT:
Finely divided acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from an iron(III) salt in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline supension at from 80.degree. to 250.degree. C., and is used for the preparation of magnetic materials suitable for magnetic recording media.

REFERENCES:
patent: 4202871 (1980-05-01), Matsumoto et al.
patent: 4379183 (1983-04-01), Araki et al.
patent: 4774072 (1988-09-01), Arndt et al.
patent: 4826671 (1989-05-01), Arndt et al.
JP-A 6,350,326, Patent Abstracts of Japan, vol. 12, No. 270 (1988).

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