Acicular ferromagnetic alloy particles and process for producing

Details Acicular ferromagnetic alloy particles and process for producing Acicular ferromagnetic alloy particles and process for producing

1983-07-14

1984-03-20

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75251, 148105, B22F 922

Patent

active

044378815

ABSTRACT:
Acicular ferromagnetic alloy particles doped with silicon, chromium and nickel and optionally magnesium and a process for producing said particles comprising heating at 300.degree. to 500.degree. C. under reducing atmosphere acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium or acicular particles of .alpha.-ferric oxide doped with silicon, chromium and nickel and optionally magnesium obtained by dehydrating the acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium are disclosed herein.

REFERENCES:
patent: 3535104 (1970-10-01), Little, Jr. et al.
patent: 3598568 (1971-08-01), Klomp
patent: 4306921 (1981-12-01), Suzuki et al.
patent: 4347291 (1982-08-01), Tokuoka

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