Method for producing aluminum oxide coated iron powder

Details Method for producing aluminum oxide coated iron powder Method for producing aluminum oxide coated iron powder

1989-01-03

1990-02-13

Silverman, Stanley

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

427224, 427226, 427377, B05D 700

Patent

active

049005901

ABSTRACT:
A method is disclosed for producing aluminum oxide coated iron powder which comprises contacting iron powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron powder with a coating of hydrolyzed aluminum oxide, and firing the iron powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron powder with a coating of aluminum oxide.

REFERENCES:
patent: 3905936 (1975-04-01), Hawthorne
patent: 4507262 (1985-03-01), Karas et al.
patent: 4719126 (1988-01-01), Henery

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