Claims
- 1. A method of forming a coating, comprising the steps of:
depositing a precursor composition over at least a portion of a substrate surface by a CVD coating device, the precursor composition comprising:
(a) a metal oxide precursor material; and (b) a photoabsorption band modifying precursor material.
- 2. The method of claim 1, wherein the metal oxide precursor material is a titania precursor material.
- 3. The method of claim 2, wherein the titania precursor material is selected from the group consisting of titanium tetrachloride, titanium alkoxides, and mixtures thereof.
- 4. The method of claim 3, wherein the titania precursor material is selected from titanium isopropoxide and titanium tetraethoxide.
- 5. The method of claim 1, wherein the material (b) includes at least one metal selected from chromium (Cr), vanadium (V), manganese (Mn), copper (Cu), iron (Fe), magnesium (Mg), scandium (Sc), yttrium (Y), niobium (Nb), molybdenum (Mo), ruthenium (Ru), tungsten (W), silver (Ag), lead (Pb), nickel (Ni), rhenium (Re), and mixtures or combinations thereof.
- 6. The method of claim 1, wherein the material (b) is configured to modify the photoabsorption band of the coating to include at least a portion of the visible electromagnetic spectrum not in the photoabsorption band of the coating without the material (b).
- 7. The method of claim 1, wherein the material (b) is configured to modify the photoabsorption band of the coating to include at least one wavelength in the range of 400 nm to 800 nm.
- 8. The method of claim 1, wherein the material (b) is at least partly soluble in the material (a).
- 9. The method of claim 1, wherein the substrate is a float glass ribbon and the method includes depositing the precursor materials onto the float glass ribbon.
- 10. The method of claim 1, wherein the substrate is a float glass ribbon in a molten metal bath and the method includes depositing the precursor materials onto the float glass ribbon in the metal bath.
- 11. The method of claim 9, wherein the float glass ribbon is located between a molten metal bath and an annealing lehr.
- 12. The method of claim 1, wherein the coating is photocatalytic upon exposure to electromagnetic energy in the range of 400 nm to 800 nm.
- 13. The method of claim 1, wherein the coating is photoactively hydrophilic upon exposure to electromagnetic energy in the range of 400 nm to 800 nm.
- 14. A method of forming a photoactive coating having a photoabsorption band including at least a part of the visible region of the electromagnetic spectrum, comprising the steps of:
depositing a precursor composition over at least a portion of a float glass ribbon in a molten metal bath by a CVD coating device, the precursor composition comprising:
a titania precursor material; and at least-one other precursor material having a metal selected from chromium (Cr), vanadium (V), manganese (Mn), copper (Cu), iron (Fe), magnesium (Mg), scandium (Sc), yttrium (Y), niobium (Nb), molybdenum (Mo), ruthenium (Ru), tungsten (W), silver (Ag), lead (Pb), nickel (Ni), rhenium (Re), and mixtures thereof.
- 15. The method of claim 12, wherein the titania precursor material is selected from titanium tetrachloride and titanium alkoxides.
- 16. The method of claim 15, wherein the titania precursor material is selected from titanium isopropoxide and titanium tetraethoxide
- 17. The method of claim 14, including heating the substrate to a temperature sufficient to decompose the titania precursor material and the other precursor material to form the photoactive coating.
- 18. The method of claim 14, wherein the photoactive coating is photocatalytic upon exposure to electromagnetic energy in the range of 400 nm to 800 nm.
- 19. The method of claim 14, wherein the photoactive coating is photoactively hydrophilic upon exposure to electromagnetic energy in the range of 400 nm to 800 nm.
- 20. The method of claim 14, including depositing sufficient precursor composition such that the photocatalytic coating has a thickness in the range of about 50 Å to about 2000 Å.
- 21. The method of claim 14, including depositing an intermediate layer between the ribbon and the photocatalytic coating.
- 22. The method of claim 21, wherein the intermediate layer is an antireflective layer.
- 23. The method of claim 22, wherein the antireflective layer comprises at least one of aluminum oxide, tin oxide, indium oxide, silicon oxide, silicon oxycarbide, and silicon oxynitride.
- 24. The method of claim 21, wherein the intermediate layer is a sodium ion diffusion barrier layer.
- 25. The method of claim 24, wherein the barrier layer includes at least one of silicon oxide, silicon nitride, silicon oxynitride, silicon oxycarbide, aluminum oxide, fluorine doped aluminum oxide, aluminum nitride, and mixtures thereof.
- 26. An article, comprising:
a substrate having at least one surface; and a coating deposited over at least a portion of the substrate surface, wherein the coating comprises titania and at least one additional material selected from chromium (Cr), vanadium (V), manganese (Mn), copper (Cu), iron (Fe), magnesium (Mg), scandium (Sc), yttrium (Y), niobium (Nb), molybdenum (Mo), ruthenium (Ru), tungsten (W), silver (Ag), lead (Pb), nickel (Ni), rhenium (Re), and mixtures thereof, and wherein the coating is deposited over the substrate by chemical vapor deposition.
- 27. The article of claim 26, wherein the substrate is selected from glass, plastic, and ceramic.
- 28. The article of claim 26, wherein the article is an insulating glass unit and the substrate is at least one of the panes of the insulating glass unit.
- 29. The article of claim 26, wherein the substrate is selected from annealed glass, tempered glass, and heat strengthened glass.
- 30. The article of claim 26, wherein the article is an architectural transparency.
- 31. The article of claim 26, wherein the coating is deposited directly on the substrate surface.
- 32. The article of claim 26, wherein the coating comprises titania at least partly in the anatase phase.
- 33. The article of claim 26, wherein the coating comprises titania at least partly in the rutile phase.
- 34. The article of claim 26, wherein the substrate includes at least one surface having tin diffused therein.
- 35. The article of claim 26, wherein the coating has a thickness of about 50 Å to about 2000 Å.
- 36. The article of claim 26, wherein the substrate is a float glass ribbon.
- 37. The article of claim 26, including at least one intermediate layer located between the substrate surface and the coating.
- 38. The article of claim 37, wherein the intermediate layer is an antireflective layer.
- 39. The article of claim 37, wherein the intermediate layer is a sodium ion diffusion barrier layer.
- 40. The article of claim 38, wherein the antireflective layer comprises at least one of aluminum oxide, tin oxide, indium oxide, silicon oxide, silicon oxycarbide, silicon oxynitride, and mixtures thereof.
- 41. The article of claim 39, wherein the barrier layer comprises at least one of tin oxide, silicon oxide, titanium oxide, zirconium oxide, fluorine-doped tin oxide, aluminum oxide, magnesium oxide, zinc oxide, cobalt oxide, chromium oxide, iron oxide, and mixtures thereof.
- 42. A method of forming a coating, comprising the steps of:
depositing a sodium ion diffusion barrier layer over at least a portion of a substrate; depositing a photoactive coating over at least a portion of the barrier layer; and implanting at least one selected metal into the photoactive coating by ion-implantation to form a photoactive coating having an absorption band including at least one wavelength in the range of 400 nm to 800 nm.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of U.S. application Ser. No. 10/075,316 to Greenberg et al., entitled “Photocatalytically-Activated Self-Cleaning Appliances”, filed Feb. 14, 2002, which is a divisional of U.S. application Ser. No. 09/282,943 filed Apr. 1, 1999 (now U.S. Pat. No. 6,413,581), which is a divisional of U.S. application Ser. No. 08/899,257, filed Jul. 23, 1997 (now U.S. Pat. No. 6,027,766), which claimed the benefit of U.S. Provisional Application Serial No. 60/040,566, filed Mar. 14, 1997, all of which applications are herein incorporated by reference in their entirety. This application also claims the benefit of U.S. Provisional Application Serial No. 60/305,057 filed Jul. 13, 2001, which is herein incorporated by reference in its entirety.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60040566 |
Mar 1997 |
US |
|
60305057 |
Jul 2001 |
US |
Divisions (2)
|
Number |
Date |
Country |
Parent |
09282943 |
Apr 1999 |
US |
Child |
10075316 |
Feb 2002 |
US |
Parent |
08899257 |
Jul 1997 |
US |
Child |
09282943 |
Apr 1999 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10075316 |
Feb 2002 |
US |
Child |
10193446 |
Jul 2002 |
US |