Method for production of metal magnetic particles

Details Method for production of metal magnetic particles Method for production of metal magnetic particles

1982-01-05

1983-08-23

Pianalto, Bernard D.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

264129, 423632, C04B 1514

Patent

active

044003374

ABSTRACT:
A method for the production of uniform acicular metal magnetic particles comprising predominantly iron which have excellent magnetic characteristics and are useful as a recording element for a magnetic recording medium, said method comprising the steps of coating the surface of metal compound particles containing predominantly acicular iron oxyhydroxide or iron oxides with at least one member selected from the group consisting of an aluminum compound and a silicon compound, pelletizing the coated particles, and reducing the pellets with heating under reducing atmosphere, e.g. under hydrogen stream.

REFERENCES:
patent: 4309459 (1982-01-01), Tokuoka
patent: 4311684 (1982-01-01), Umeki

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