Process for preparing hexaferrite particles

Details Process for preparing hexaferrite particles Process for preparing hexaferrite particles

1991-06-10

1992-08-04

Cooper, Jack

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

252 6259, 252 6263, C04B 3526

Patent

active

051357330

ABSTRACT:
The present invention concerns a process for preparing magnetic particles of barium or strontium hexaferrites exhibiting a good dispersibility and improved magnetic properties. The process involves coprecipitating an iron salt with a barium or strontium salt, filtering and neutralizing the resulting coprecipitate, and washing it with a solution of a barium or strontium salt having a concentration in the range of 2.times.10.sup.-3 0.2 M.

REFERENCES:
patent: 4025449 (1977-05-01), Pezzoli et al.
patent: 4120806 (1978-10-01), Watanabe et al.
patent: 4120807 (1978-10-01), Watanabe et al.

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