METHODS OF OBTAINING PHOTOACTIVE COATINGS AND/OR ANATASE CRYSTALLINE PHASE OF TITANIUM OXIDES AND ARTICLES MADE THEREBY

• US 20080124460A1
• Filed: 01/09/2008
• Published: 05/29/2008
• Est. Priority Date: 08/31/2000
• Status: Active Grant

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Finley, James J., Athey, Pat Ruzakowski
• Granted Patent: US 7,842,338 B2
• Time in Patent Office: Days
• US Class Current: 427/165
• CPC Class Codes: C03C 17/002 for flat glass, e.g. float glass
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: C23C 14/024 Deposition of sublayers, e.g. to promote adhesion of the coating C23C14/027 takes precedence
• CPC Class Codes: C23C 14/083 of refractory metals or yttrium
• CPC Class Codes: C23C 14/185 by cathodic sputtering
• CPC Class Codes: C23C 14/5806 Thermal treatment
• CPC Class Codes: C23C 14/5853 Oxidation
• CPC Class Codes: C23C 16/405 of refractory metals or yttrium
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft
• CPC Class Codes: Y10T 428/261 In terms of molecular thickness or light wave length
• CPC Class Codes: Y10T 428/265 1 mil or less

Abstract

A method of making a photoactive coating includes depositing a first coating material containing zirconium oxide over at least a portion of a substrate and depositing a second coating material containing titanium oxide over at least a portion of the first coating material to provide a coated substrate. At least one of the first and second coating materials is deposited by pyrolytic deposition.

Claims

1. A method of making a transparency, comprising the steps of:

providing a glass substrate having at least one surface;

pyrolytically depositing a first continuous film comprising zirconium oxide in the cubic, baddeleyite or orthorhombic crystalline phase directly on substantially all of the glass substrate surface; and

pyrolytically depositing a second continuous film comprising a material selected from at least one metal oxide or semiconductor metal oxide on substantially all of the first film.

2. The method of claim 1, including heating the substrate to a temperature of at least 400°

C. prior to depositing the first film.

3. The method of claim 1, including heating the substrate to a temperature of at least 600°

C. prior to depositing the first film.

4. The method of claim 1, including heating the substrate such that the substrate has a temperature of at least 400°

C. prior to at the beginning of the second depositing step.

5. The method of claim 1, including heating the substrate such that the substrate has a temperature of at least 600°

C. at the beginning of the second depositing step.

6. The method of claim 1, wherein the first continuous film has a dry film thickness greater than 100 Å

.

7. The method of claim 1, wherein the first continuous film has a dry film thickness in the range of 100 Å

to 500 Å

.

8. The method of claim 1, wherein the second continuous film has a dry film thickness greater than 100 Å

.

9. The method of claim 1, wherein the second continuous film has a dry film thickness in the range of 100 Å

to 500 Å

.

10. The method of claim 1, wherein the second continuous layer is in direct contact with the first continuous layer.

11. A method of making a transparency, comprising:

providing a glass substrate having at least one surface;

pyrolytically depositing a first continuous layer comprising zirconium oxide in the cubic, baddeleyite or orthorhombic crystalline phase directly on substantially all of the substrate; and

pyrolytically depositing a second continuous layer comprising titanium oxide on substantially all of the first layer.

12. The method of claim 11, wherein the first layer has a thickness greater than 100 Å

.

13. The method of claim 11, wherein the second layer is in direct contact with the first layer.

14. The method of claim 11, wherein the second layer has a thickness greater than 100 Å

.

15. A method of making a coated substrate, comprising:

providing a glass substrate having at least one surface;

pyrolytically depositing a first continuous layer comprising zirconium oxide in the cubic, baddeleyite or orthorhombic crystalline phase in contact with at least a portion of the glass substrate surface; and

depositing a second continuous layer comprising a material selected from at least one metal oxide or semiconductor metal oxide on substantially all of the first layer.