METHOD FOR PREPARING AN ALPHA ALUMINA COATING

摘要

Provided is a method of producing an alumina film mainly in ± crystal structure superior in heat resistance, wherein the alumina film mainly in ± crystal structure is formed on a substrate, independently of the kind of the substrate at relatively low temperature, by treating the substrate surface with a ceramic powder mainly having the crystal structure same as that of alumina in the ± crystal structure, in forming the alumina film mainly in ± crystal structure on the substrate (including the substrate having a film previously formed thereon).