Plate-like barium ferrite particles suitable for use in magnetic

Details Plate-like barium ferrite particles suitable for use in magnetic Plate-like barium ferrite particles suitable for use in magnetic

1987-01-29

1989-07-25

Thibodeau, Paul J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

252 6256, 252 6259, 252 6263, 428402, 428694, B32B 516

Patent

active

048512923

ABSTRACT:
Disclosed herein are plate-like barium ferrite particles with a solid solution of zinc on the surface thereof, which have an average particle diameter of not less than 0.03 .mu.m and less than 0.1 .mu.m, a BET specific surface are of 55 to 80 m.sup.2 /g, a coercive force of 300 to 1,500 Oe and a magnetization of not less than 57 emu/g, preferably not less than 60 emu/g, in magnetic field of 10 KOe, and which are represented by the following formula (I):

REFERENCES:
patent: 4529524 (1985-07-01), Nagai et al.
patent: 4539129 (1985-09-01), Nagai et al.
patent: 4548801 (1985-10-01), Nagai et al.
patent: 4561988 (1985-12-01), Nagai et al.
patent: 4584242 (1986-04-01), Nagai et al.
patent: 4585568 (1986-04-01), Nagai et al.
patent: 4683167 (1987-07-01), Scott et al.
patent: 4698182 (1987-10-01), Nagai et al.

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