Method for preparing magnetic particles for magnetic-recording m

Details Method for preparing magnetic particles for magnetic-recording m Method for preparing magnetic particles for magnetic-recording m

1988-08-18

1989-07-25

Cooper, Jack

Coating processes

Magnetic base or coating

252 6256, 252 6263, 427131, C01G 4906

Patent

active

048512583

ABSTRACT:
Magnetic particles of modified .gamma.-ferric oxide particles for magnetic recording media which have excellent electrical conductivity, saturation magnetization, and print-through, and have a higher coercivity, are prepared by modifying .gamma.-ferric oxide particles first with cobalt and then with ferrous iron, both in the presence of an alkaline earth metal salt in an alkaline solution containing the .gamma.-ferric oxide particles dispersed therein.

REFERENCES:
patent: 4296149 (1981-10-01), Rudolf et al.

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