Pyrolytic deposition of a cobalt/tin oxide spinel film
AssigneePPG Industries, Inc.
InventorsJoseph E. Michelotti, Stanley M. Ohlberg
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Abstract
Pyrolytic deposition of a durable, uniform, electrically nonconductive solar energy reflecting spinel-type film from an aqueous solution of a water soluble cobalt salt and a water soluble tin compound is disclosed.
Claims8
A method for depositing an electrically nonconductive spinel-type film comprising the oxides of cobalt and tin on a glass substrate comprising the steps of:
- a. maintaining a substrate in an oxidizing atmosphere at a temperature sufficient to pyrolyze metal compounds to metal oxides;
- b. contacting the surface of the substrate at said temperature with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound capable of thermal decomposition to cobalt oxide and tin oxide;
- and
- c. thermally reacting said cobalt salt and said tin compound in said oxidizing atmosphere to form an electrically nonconductive film comprising a cobalt/tin oxide spinel wherein cobalt is the predominant metal in the film.
A coated glass article comprising an electrically nonconducting film comprising a cobalt/tin oxide spinel wherein the cobalt is the predominant metal in said film prepared by contacting a glass surface at a temperature greater than 500.degree. F. (about 260.degree. C.) with an aqueous solution consisting essentially of water, a water soluble cobalt salt and a water soluble tin compound.
Dependencies are inferred from the claim text.