Iron oxide particles and method for production thereof

Details Iron oxide particles and method for production thereof Iron oxide particles and method for production thereof

2006-12-12

2006-12-12

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Iron-oxygen compound containing

C252S062580, C252S062640, C428S403000

Reexamination Certificate

active

07147796

ABSTRACT:
Iron oxide particles having the surface thereof coated with a layer of a complex iron oxide containing Al and Mg are disclosed. The total content of Al and Mg in the complex iron oxide layer is 0.1 to 2.5% by weight based on the whole iron oxide particles. The Mg content in the complex iron oxide layer is 0.05 to 1% by weight based on the whole iron oxide particles. The Al content in the complex iron oxide layer is 0.05 to 1.7% by weight based on the whole iron oxide particles. The Mg content in the complex iron oxide layer is 20% or more based on the total Mg content of the whole iron oxide particles.

REFERENCES:
patent: 5294492 (1994-03-01), Oka et al.
patent: 2005/0152828 (2005-07-01), Aga et al.
patent: 53-136038 (1978-11-01), None
patent: 58-123548 (1983-07-01), None
patent: 07-335417 (1995-12-01), None
patent: 2000-239021 (2000-09-01), None
patent: 2000-335920 (2000-12-01), None
Translation of JP 2000-239021, Sep. 2000.

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