Ferromagnetic fine powder for magnetic recording

Details Ferromagnetic fine powder for magnetic recording Ferromagnetic fine powder for magnetic recording

1995-05-09

1996-12-17

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6263, 252 6259, 423593, C04B 3526

Patent

active

055850324

ABSTRACT:
Ferromagnetic fine powder for magnetic recording, characterized by comprising platelet like ferrite crystal particles which have such a metallic element composition that the Ba/Fe molar ratio is 1/50 to 1/8 and that the total amount of Ni and Zn is less than 0.5 mole and not less than 0.07 mole per mole of Fe, a crystal phase of magnetoplumbite phase, spinel phase or composite phase thereof and a saturation magnetization of 60 emu/g or more; and a process for producing said ferromagnetic fine powder for magnetic record.

REFERENCES:
patent: 4705718 (1987-11-01), Kitahata
patent: 4778734 (1988-10-01), Ohdan et al.

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