Photocatalytic window and method of making same
First Claim
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1. A method of making a heat treated coated article, the method comprising:
- providing a coating supported by a glass substrate, the coating comprising a zirconium nitride based layer;
thermally tempering the glass substrate with the zirconium nitride based layer thereon, so that the tempering causes the zirconium nitride based layer to transform into a layer comprising zirconium oxide (ZrxOy) where y/x is from about 1.2 to 2.5; and
following said tempering, forming a photocatalytic layer comprising anatase TiO2 on the glass substrate over and directly contacting the layer comprising zirconium oxide (ZrxOy), wherein the photocatalytic layer is initially deposited in a wet form including titania colloids in solution,wherein deposition of the photocatalytic layer in wet form causes the photocatalytic layer to have a nano-porosity sufficient to cause a refractive index of the photocatalytic layer to substantially match a refractive index of the layer comprising zirconium oxide.
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Abstract
Certain example embodiments of this invention relate to a photocatalytic coated article and a method of making the same. In certain example embodiments, a coated article includes a zirconium nitride and/or oxide inclusive layer before heat treatment (HT). The coated article is heat treated so that following heat treatment (e.g., thermal tempering) a zirconium oxide based layer is provided. A photocatalytic layer (e.g., of an oxide of titanium) may be formed over zirconium oxide based layer following heat treatment.
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Citations
21 Claims
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1. A method of making a heat treated coated article, the method comprising:
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providing a coating supported by a glass substrate, the coating comprising a zirconium nitride based layer; thermally tempering the glass substrate with the zirconium nitride based layer thereon, so that the tempering causes the zirconium nitride based layer to transform into a layer comprising zirconium oxide (ZrxOy) where y/x is from about 1.2 to 2.5; and following said tempering, forming a photocatalytic layer comprising anatase TiO2 on the glass substrate over and directly contacting the layer comprising zirconium oxide (ZrxOy), wherein the photocatalytic layer is initially deposited in a wet form including titania colloids in solution, wherein deposition of the photocatalytic layer in wet form causes the photocatalytic layer to have a nano-porosity sufficient to cause a refractive index of the photocatalytic layer to substantially match a refractive index of the layer comprising zirconium oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of making a heat treated coated article, the method comprising:
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providing a coating supported by a glass substrate, the coating comprising a silver-inclusive layer and a zirconium nitride based layer over the silver-inclusive layer; thermally tempering the glass substrate with the silver-inclusive layer and the zirconium nitride based layer thereon, so that the tempering causes the zirconium nitride based layer to transform into a layer comprising zirconium oxide (ZrxOy) where y/x is from about 1.2 to 2.5; and following said tempering, forming a photocatalytic layer comprising anatase TiO2 on the glass substrate over the layer comprising zirconium oxide (ZrxOy), wherein the photocatalytic layer is initially deposited in a wet form including titania colloids in solution, wherein deposition of the photocatalytic layer in wet form causes the photocatalytic layer to have a nano-porosity sufficient to cause a refractive index of the photocatalytic layer to substantially match a refractive index of the layer comprising zirconium oxide, wherein the layer comprising zirconium oxide and the photocatalytic layer have a porosity selected so as to permit silver particles to migrate therethrough over time in providing an anti-fungal and/or an anti-bacterial function(s).
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21. A method of making a heat treated coated article, the method comprising:
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providing a coating supported by a glass substrate, the coating comprising a zirconium nitride based layer; thermally tempering the glass substrate with the zirconium nitride based layer thereon, so that the tempering causes the zirconium nitride based layer to transform into a layer comprising zirconium oxide (ZrxOy) where y/x is from about 1.2 to 2.5; and following said tempering, forming a photocatalytic layer comprising anatase TiO2 on the glass substrate over the layer comprising zirconium oxide (ZrxOy), wherein the photocatalytic layer is initially deposited in a wet form including titania colloids in solution, wherein deposition of the photocatalytic layer in wet form causes the photocatalytic layer to have a nano-porosity sufficient to cause a refractive index of the photocatalytic layer to substantially match a refractive index of the layer comprising zirconium oxide, wherein either (a) a silica-based primer is disposed between the layer comprising zirconium oxide and the photocatalytic layer, or (b) the wet form used to deposit the photocatalytic layer also includes an acidic catalyzed silica.
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Specification