Acicular ferromagnetic metal particles

Details Acicular ferromagnetic metal particles Acicular ferromagnetic metal particles

1983-08-24

1984-08-07

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75251, 148105, B22F 926, H01F 106

Patent

active

044641966

ABSTRACT:
Acicular ferromagnetic metal particles consisting essentially of iron and having coercive forces greater than 1300 oersteds when the surface areas of the particles are not greater than 45 m.sup.2 /gram are described. The particles are obtained by reducing a hydrothermally produced .alpha.-Fe.sub.2 O.sub.3 with a gaseous reducing agent at a temperature of about 300.degree. to 400.degree. C.

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Magnetic Media Information Services International Newsletter, vol. V, No. 4, Apr. 1982, pp. 64-66. Publication date is not earlier than Aug. 30, 1982.

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