Heat treatable coated article with zinc-doped zirconium based layer(s) in coating
View Patent ↗In certain example embodiments, a coated article includes a Zn-doped zirconium based layer before heat treatment (HT). The coated article is heat treated sufficiently to cause the Zn-doped zirconium based layer to transform into a Zn-doped zirconium oxide based layer that is scratch resistant and/or chemically durable. The doping of the layer with Zn has been found to improve scratch resistance and/or corrosion resistance.
1. A method of making a heat treated coated article, the method comprising:
having a coating supported by a glass substrate, the coating comprising a layer comprising zirconium and zinc; and
thermally tempering the glass substrate with the layer comprising zirconium and zinc thereon, so that after the tempering a layer comprising zinc-doped zirconium oxide is provided on the glass substrate, wherein following tempering the layer comprising zinc-doped zirconium oxide is characterized by (Zn:Zr x O y ) where y/x is from about 1.2 to 2.5, and wherein following tempering the layer comprising zinc-doped zirconium oxide is doped with fluorine and/or carbon.
2. The method of claim 1 , wherein y/x is from about 1.4 to 2.1.
3. The method of claim 1 , wherein the layer comprising zirconium and zinc, prior to the tempering, comprises material selected from the group consisting of: Zn:ZrO x , Zn:ZrN x , Zn:ZrO x N y , Zn:ZrB x , Zn:ZrC x , and mixtures thereof.
4. The method of claim 1 , wherein prior to the tempering, the coating further comprises a layer comprising diamond-like carbon located on the glass substrate over at least the layer comprising zirconium and zinc.
5. The method of claim 1 , wherein prior to and/or after the tempering, the coating further comprises a dielectric layer between the glass substrate and the layer comprising zirconium and zinc.
6. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide comprises a nanocrystalline cubic lattice structure.
7. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide has a Zr:Zn atomic ratio of from about 40:1 to 1.5:1.
8. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide has a Zr:Zn atomic ratio of from about 10:1 to 5:1.
9. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide is an outermost layer of the coated article following tempering.
10. The method of claim 1 , wherein visible transmission % of the coated article increases by at least 30% due to the tempering.
11. The method of claim 1 , wherein the tempered coated article has a visible transmission of at least 70%.
12. The method of claim 1 , wherein the coated article after tempering has a visible transmission of at least 70% and a test critical scratch load using a borosilicate sphere of at least about 20 lbs.
13. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide is an outermost layer of the coated article following tempering and is capable of withstanding a corrosion test comprising: (a) a preliminary five minute dip in vinegar followed by (b) a one hour exposure to 0.1 N NaOH at room temperature followed by (c) a one hour exposure to 5% HCl, without entirely dissolving.
14. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide further comprises Sn.
15. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide further comprises Cu.
16. The method of claim 1 , wherein the layer comprising zinc-doped zirconium oxide further comprises from about 1-5% nitrogen prior to tempering.
17. The method of claim 1 , wherein the coated article following tempering consists essentially of the glass substrate and the layer comprising zinc-doped zirconium oxide, optionally with one dielectric layer provided therebetween.
18. A method of making a coated article, the method comprising:
having a coating supported by a substrate, the coating comprising a layer comprising zirconium and zinc; and
heat treating the substrate with the layer comprising zirconium and zinc thereon, so that after the tempering a layer comprising oxide of Zn and Zr is provided as an outermost layer of the coated article, wherein following the heat treating the layer comprising zinc-doped zirconium oxide is characterized by (Zn:Zr x O y ) where y/x is from about 1.2 to 2.5, and wherein the layer comprising zinc-doped zirconium oxide further comprises from about 1-5% nitrogen prior to the heat treating.
19. The method of claim 18 , wherein the coated article further comprises a layer comprising one or more of silicon nitride and/or silicon oxide that is provided on the substrate between the substrate and the layer consisting essentially of Zn:ZrO x .
20. The method of claim 18 , wherein the coated article following the heat treating consists essentially of the glass substrate and the layer comprising zinc-doped zirconium oxide, optionally with one dielectric layer provided therebetween.