Methods of obtaining photoactive coatings and/or anatase crystalline phase of titanium oxides and articles made thereby
First Claim
Patent Images
1. A method of forming a material having a predetermined crystalline phase, comprising the steps of:
- forming a film having cubic or orthorhombic crystalline phase of zirconium oxide over at least a portion of a substrate surface that will enhance the growth of the predetermined crystal phase defined as a first forming step;
forming the material selected from at least one metal oxide or semiconductor metal oxide on the film defined as a second forming step; and
heating at least one of the substrate, the film or the material to have the material have at least one predetermined crystalline phase.
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Abstract
Hydrophilic and/or rutile and anatase titanium oxide are obtained by sputter depositing titanium metal oxide on a film of zirconium oxide in the cubic phase. Another technique is to deposit a titanium metal on a film of zinc oxide in the cubic phase and heating the coating in an oxidizing atmosphere to provide an anatase and/or rutile phase(s) of titanium oxide.
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Citations
45 Claims
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1. A method of forming a material having a predetermined crystalline phase, comprising the steps of:
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forming a film having cubic or orthorhombic crystalline phase of zirconium oxide over at least a portion of a substrate surface that will enhance the growth of the predetermined crystal phase defined as a first forming step;
forming the material selected from at least one metal oxide or semiconductor metal oxide on the film defined as a second forming step; and
heating at least one of the substrate, the film or the material to have the material have at least one predetermined crystalline phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making a photoactive coating, comprising the steps of:
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forming a first coating layer comprising zirconium oxide in cubic or orthorhombic crystalline phase over at least a portion of a substrate defined as a first forming step; and
forming a second coating layer comprising titanium oxide over at least a portion of the first coating layer defined as a second forming step to provide a coated substrate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
70°
F. to 500°
F. (21°
C. to 259°
C.);
greater than or equal to 200°
F. (93°
C.);
200°
F. to 1000°
F. (93°
C. to 537°
C.);
or 300°
F. to 500°
F. (148°
C. to 259°
C.).
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15. The method of claim 9, wherein the first coating layer has a thickness greater than or equal to 15 Å
- .
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16. The method of claim 9, wherein the first coating layer has a thickness less than or equal to 150 Å
- .
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17. The method of claim 9, wherein the first coating layer has a thickness greater than 100 Å
- .
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18. The method of claim 9, wherein the first coating layer has a thickness less than 500 Å
- .
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19. The method of claim 9, wherein the first coating layer has a thickness in one or more of the following thickness ranges:
- greater than or equal to 15 Å
;
greater than or equal to 25 Å
;
greater than 0 Å and
less than or equal to 150 Å
;
40 Å
to 80 Å
;
60 Å
to 70 Å
;
greater than or equal to 100 Å
;
greater than 0 Å and
less than 500 Å
;
or greater than or equal to 400 Å
.
- greater than or equal to 15 Å
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20. The method of claim 9, including heating the coated substrate to a temperature greater than or equal to about 400°
- F. (204°
C.).
- F. (204°
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21. The method of claim 9, including heating the coated substrate to a temperature greater than or equal to 500°
- F. (259°
C.).
- F. (259°
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22. The method of claim 9, including heating the coated substrate to a temperature greater than or equal to 600°
- F. (315°
C.).
- F. (315°
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23. The method of claim 9, wherein the second coating layer has a thickness greater than or equal to 100 Å
- .
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24. The method of claim 9, wherein the second coating layer has a thickness greater than or equal to 200 Å
- .
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25. The method of claim 9, wherein the second coating layer has a thickness in the range of 100 Å
- to 500 Å
.
- to 500 Å
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26. The method of claim 9, wherein the second coating layer has a thickness in one of the following thickness ranges:
- greater than or equal to 100 Å
;
greater than or equal to 200 Å
;
100 Å
to 500 Å
;
300 Å
to 400 Å
.
- greater than or equal to 100 Å
-
27. The method of claim 9, wherein the substrate is glass.
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28. The method of claim 9, wherein the photoactive coating is photohydrophilic.
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29. The method of claim 9, wherein the photoactive coating is photocatalytic.
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30. The method of claim 9, wherein the coated substrate has a contact angle with water of less than or equal to 20°
- after 60 to 90 minutes exposure to electromagnetic radiation having a wavelength of 340 nm at an intensity of 24 W/m2 at the coating surface.
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31. The method of claim 21, wherein the contact angle is less than 10°
- .
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32. A coated substrate made by the method of claim 9.
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33. An article, comprising:
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a substrate;
a zirconium oxide layer having cubic or orthorhombic crystalline phases and having a thickness of 10 Å
to 200 Å
formed over at least a portion of the substrate; and
a titanium oxide layer formed over the zirconium oxide layer. - View Dependent Claims (34, 35, 36, 37, 38)
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39. An article, comprising:
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a substrate;
a first layer deposited over at least a portion of the substrate and comprising zirconium oxide in a cubic or orthorhombic crystalline phase; and
a second layer deposited over the first layer and comprising at least one photoactive material. - View Dependent Claims (40, 41, 42, 43)
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44. A method of coating a substrate having a first surface and a second surface, comprising the steps of:
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depositing a zirconium oxide layer having a cubic or orthorhombic crystalline phase over at least a portion of the first surface;
forming a photoactive coating comprising a titanium oxide layer on the zirconium oxide layer over at least a portion of the first surface defined as a first forming step; and
forming a functional coating over at least a portion of the second surface defined as a second forming step. - View Dependent Claims (45)
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Specification