Method for the preparation of metallic oxide coatings
AssigneeCentre National de la Recherche Scientifique (CNRS)
InventorsLouis Cot, Jacques C. Rouviere, Christian G. Guizard, Andre Larbot
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Abstract
The invention relates to a method for the preparation of metallic oxides. The method is carried by controlled hydrolysis of metallic alkoxides using an alkoxide emulsion which contains hydrophobic water/solvent reverse micelles and a surfactant, then submitting the polymer gel obtained to thermal treatment. In order to prepare metallic oxides layers, the reaction product is coated on a support when hydrolysis is only partial.
Claims19
Method for coating a substrate, comprising applying to a substrate the product resulting from contacting alkoxides consisting essentially of metal alkoxides or consisting essentially of metal alkoxides in solution in a hydrophobic solvent with an emulsion containing a surfactant and reverse micelles of water in a hydrophobic solvent for said metal alkoxides, wherein said product is applied to said substrate after significant hydrolysis but before complete gelation has taken place, completing the hydrolysis after application of said product to the substrate so as to form a polymer gel, and thermally treating said polymer gel so as to obtain a substrate coated with metallic oxides of the metals of the corresponding metal alkoxides.
Method according to claim 8 wherein the solvent is decane.
Dependencies are inferred from the claim text.