Magnetic iron oxides with improved orientability and a process f

Details Magnetic iron oxides with improved orientability and a process f Magnetic iron oxides with improved orientability and a process f

1974-08-29

1976-01-06

Douglas, Winston A.

Compositions

Magnetic

Iron-oxygen compound containing

252 6256, 423634, 106304, 106292, 106288B, C01G 4906

Patent

active

039310256

ABSTRACT:
An acicular, magnetic iron oxide pigment containing about 0.1 to 2 percent by weight of zinc and phosphate ions is produced by growing seeds and subsequently reducing and optionally reoxidizing acicular FeOOH. Said seeds were formed by precipitation from an iron (II) salt solution in the presence of about 0.1 to 4 percent by weight of zinc ions and about 0.1 to 2 percent by weight of phosphate ions based on the formed seeds.

REFERENCES:
patent: 3382174 (1968-05-01), Hand
patent: 3652334 (1972-03-01), Abeck et al.
patent: 3873462 (1975-03-01), Trandell

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