Magnetic powder for magnetic recording media

Details Magnetic powder for magnetic recording media Magnetic powder for magnetic recording media

1990-04-30

1991-11-05

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6258, 252 6259, 252 626, 252 6262, 252 6263, 252 6264, 428694, 428900, C04B 3526

Patent

active

050629832

ABSTRACT:
A magnetic powder for magnetic recording media, which has an average particle diameter of at most 0.08 .mu.m and a ratio of the maximum diameter to the maximum thickness of at most 8 and is represented by the following general composition formula:

REFERENCES:
patent: 4341648 (1982-07-01), Kubo et al.
patent: 4529524 (1985-07-01), Nagai et al.
patent: 4551260 (1985-11-01), Hayakawa et al.
patent: 4585568 (1986-04-01), Nagai et al.
patent: 4636433 (1987-01-01), Kubo et al.
patent: 4770933 (1988-09-01), Kitahata et al.
patent: 4789494 (1988-12-01), Aoki et al.
patent: 4820433 (1989-04-01), Yamamoto et al.
patent: 4828916 (1989-05-01), Yamamoto et al.
patent: 4886714 (1989-12-01), Torii et al.
Tadashi Ido et al., "Barium Ferrite Fine Particles for Perpendicular Magnetic Recording Media" Toshiba Review, No. 154, Winter 1985, pp. 10-13.

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