Method for manufacturing magnetic powder for high density magnet

Details Method for manufacturing magnetic powder for high density magnet Method for manufacturing magnetic powder for high density magnet

1980-11-03

1982-07-27

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6256, 252 6258, 252 6259, 423594, C04B 3526

Patent

active

043416489

ABSTRACT:
A method for preparing a magnetic powder for high density magnetic recording includes melting a mixture containing the fundamental component of a hexagonal ferrite, a substituting component for reducing the coercive force, and a glass forming material. The resultant molten material is rapidly cooled to obtain an amorphous body which is then heat-treated to produce desired substituted type hexagonal ferrite particles in the glass matrix.

REFERENCES:
Journal of the American Ceramic Society, vol. 53, No. 4, 192, (1972), B. T. Shirk, W. R. Buesser, Magnetic properties of Barium ferrite formed by crystallization of a glass.
Osaka Kogyo Jijutsu shikenuo 15 [4] 285, (1964), Hideo Tanigawa, Hirokichi Tanaka, Magnetic microcrystalline materials produced by crystallization of a glass in the B.sub.2 O.sub.3 BaOFe.sub.2 D.sub.3 system.
Kajima et al., "Proceedings of the Int. Conf.: Ferrites", 1970, pp. 380-382.
Haneda et al., "Chem. Abstracts", vol. 83, 1975, 125281n.

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