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US5002751A Highly-coercive isometric iron oxides, a process for the production and the use thereof 失效
高强度等距铁氧化物,其生产和使用的方法

Highly-coercive isometric iron oxides, a process for the production and
the use thereof
摘要:
Highly-coercive isometric iron oxide useful in magnetic toners for electrostatic photo-copying processes or for magnetic printers is produced by(a) subjecting Fe.sub.3 O.sub.4 pigment produced in a wet process to oxidation and(b) subsequently reducing the oxidized pigment from (a) to produce highly-coercive Fe.sub.3 O.sub.4 pigment.
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