Zinc oxide coated substrates
AssigneeEnsci, Inc.
InventorsThomas J. Clough, Victor L. Grosvenor, Naum Pinsky
Life of this patent
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Abstract
Processes for coating substrates, in particular substrates including shielded surfaces, with zinc oxide-containing coatings are disclosed. Such processes comprise contacting a substrate with a zinc oxide precursor, preferably maintaining the precursor coated substrate at conditions to equilibrate the coating, and then oxidizing the precursor to form a substrate containing zinc oxide. Also disclosed are substrates coated with zinc oxide-containing coatings for use in various applications.
Claims22
An article comprising a three dimensional inorganic substrate other than electrically conductive zinc oxide having a coating containing electrically conductive zinc oxide on at least a portion of all three dimensions thereof produced by a process comprising;
- contacting an inorganic three dimensional substrate which includes external surfaces and shielded surfaces which are at least partially shielded by other portions of said substrate with a composition comprising a zinc oxide-forming compound other than zinc oxide at conditions effective to form a zinc oxide-forming compound containing coating on at least a portion of said substrate;
- forming a liquidus zinc oxide forming compound containing coating on at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate;
- contacting said substrate with at least one dopant forming component at conditions effective to form a dopant component-containing coating on at least a portion of said substrate including at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate;
- said contacting being initiated at least prior to the substantially complete oxidation of said zinc oxide forming compound to zinc oxide;
- contacting said substrate having said zinc oxide forming compound containing coating and said dopant component-containing coating thereon with an oxidizing agent at conditions effective to convert said zinc oxide forming compound to zinc oxide and form a doped zinc oxide coating on at least a portion of said three dimensions of said substrate including the shielded surfaces of said substrate.
An article comprising a three dimensional inorganic substrate other than electrically conductive zinc oxide having a coating containing electrically conductive zinc oxide on at least a portion of all three dimensions thereof produced by a process comprising;
- contacting an inorganic three dimensional substrate which includes external surfaces and shielded portions of said substrate with a composition comprising a zinc chloride-forming compound at conditions effective to form a zinc chloride-forming compound containing coating on at least a portion of said substrate;
- forming a liquidus zinc chloride-forming compound containing coating on at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate and at conditions effective to do at least one of the following:
- (1) coat a larger portion of said substrate with said zinc chloride-forming compound (2) distribute said zinc chloride-forming compound over said substrate;
- and (3) make said zinc chloride-forming compound containing coating more uniform in thickness;
- and contacting said substrate with said zinc chloride-forming compound containing coating with an oxidizing agent at conditions effective to convert the zinc chloride-forming compound to zinc oxide and form a zinc oxide coating on at least a portion of said three dimensions of said substrate including the shielded surfaces of said substrate.
An article comprising a three dimensional inorganic substrate other than electrically conductive zinc oxide having a coating containing electrically conductive zinc oxide on at least a portion of all three dimensions thereof produced by a process comprising;
- contacting an inorganic three dimensional substrate with a composition comprising a zinc oxide precursor powder other than zinc oxide at conditions effective to form a coating containing zinc oxide precursor on at least a portion of the substrate;
- forming a liquidus zinc oxide precursor on at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate and at conditions effective to do at least one of the following:
- (1) coat a larger portion of said substrate with said coating containing zinc oxide precursor;
- (2) distribute said coating containing zinc oxide precursor over said substrate;
- and (3) make said coating containing zinc oxide precursor more uniform in thickness;
- and contacting said coated substrate with an oxidizing agent at conditions effective to convert said zinc oxide precursor to zinc oxide on at least a portion of said three dimensions of said substrate including the shielded surfaces of said substrate and form a substrate having a zinc oxide-containing coating.
An article comprising a three dimensional inorganic substrate other than an electrically conductive zinc oxide having a particle type shape which includes external surfaces and shielded surfaces which are at least partially shielded by other portions of said substrate, said substrate having a coating containing electrically conductive doped zinc oxide coating on at least a portion of said three dimensions of said substrate including the shielded surfaces of said substrate.
Dependencies are inferred from the claim text.