Method of improving the magnetic properties of cobalt substitute

Details Method of improving the magnetic properties of cobalt substitute Method of improving the magnetic properties of cobalt substitute

1974-02-11

1976-08-10

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

252 6255, 252 6256, 264 61, 264DIG58, B06B 102

Patent

active

039742466

ABSTRACT:
A method of improving the magnetic properties of cobalt substituted magnetite by magnetizing the material to the saturation level in the desired direction, and then removing the magnetizing field. The material will retain a level of magnetization normally referred to as the remanent state of magnetization or simply remanence. The magnetized material is then subjected to a heat treatment to anneal the material. The above process significantly improves coercivity, hysteresis loop squareness ratio, and resistance to remanence loss due to external forces.

REFERENCES:
patent: 3700500 (1972-10-01), Rodbell et al.
patent: 3748270 (1973-07-01), Hwang

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