Bonded magnets containing single crystalline ferrite particles

Details Bonded magnets containing single crystalline ferrite particles Bonded magnets containing single crystalline ferrite particles

1975-11-18

1977-08-16

Edmundson, F.C.

Compositions

Magnetic

With wax, bitumen, resin, or gum

252 6263, H01F 1117, C04B 3526

Patent

active

040425169

ABSTRACT:
Single crystalline ferrite particles are obtained by the thermal reaction of ferric oxyhydroxide, ferric hydroxide, porous ferric oxide made therefrom or ferric oxide having a particle size less than 0.8.mu. with a strontium or barium compound such as the oxide hydroxide, the carbonate or the carboxylate in the presence of a small amount of a metal chloride flux such as strontium chloride or barium chloride.
The resulting particles have a well-defined, hexagonal plate configuration and are particularly adapted for the production of anisotropic magnets.

REFERENCES:
patent: 3740266 (1973-06-01), Akashi et al.
patent: 3764539 (1973-10-01), Cochardt et al.
patent: 3867299 (1975-02-01), Rohatgi

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