Coated glass pane
The present invention relates to a coated glass pane, a method of producing a coated glass pane, a multiple glazing comprising a coated glass pane and a use of a coated glass pane and/or multiple glazing in a building or vehicle. The coated glass pane includes a glass substrate and a coating suitable for reflecting infra-red radiation. The coating includes a base layer including an oxide of zirconium and titanium Zr x Ti y O z and the atomic proportion of Zr based on Zr and Ti in the base layer, calculated as x/(x+y), is from 0.40 to 0.95.
1 . A coated glass pane comprising a glass substrate and a coating, wherein the coating comprises, in sequence from the glass substrate:
a base layer adjacent to and in contact with the glass substrate;
a silver-based functional layer; and
an upper dielectric layer, wherein:
the base layer comprises an oxide of zirconium and titanium Zr x Ti y O z ; and
the atomic proportion of Zr based on Zr and Ti in the base layer, calculated as x/(x+y), is from 0.40 to 0.95.
2 . A coated glass pane according to claim 1 , wherein the atomic proportion of Zr based on Zr and Ti in the base layer, calculated as x/(x+y), is from 0.55 to 0.85.
3 . A coated glass pane according to claim 1 , wherein the atomic % of titanium in the base layer, calculated as Ti in the total composition, is from 1 to 25.
4 . A coated glass pane according to claim 1 , wherein the atomic % of oxygen in the base layer, calculated as O in the total composition, is from 60 to 70.
5 . A coated glass pane according to claim 1 , wherein the atomic % of zirconium in the base layer, calculated as Zr in the total composition, is from 12 to 35.
6 . A coated glass pane according to claim 1 , wherein the thickness of the base layer in nm is from 6 to 60.
7 . A coated glass pane according to claim 1 , wherein the Zr factor of the base layer, calculated as the thickness of the base layer in nm multiplied by the atomic proportion of Zr based on Zr and Ti in the base layer, is from 1 to 35.
8 . A coated glass pane according to claim 1 , wherein the coating further comprises a growth promotion layer between the base layer and the silver-based functional layer, optionally wherein the silver-based functional layer is in direct contact with the growth promotion layer and/or the growth promotion layer is based on an oxide of zinc.
9 . A coated glass pane according to claim 8 , wherein the growth promotion layer is in direct contact with the base layer.
10 . A coated glass pane according to claim 8 , wherein the coating further comprises a stabilisation layer between the base layer and the growth promotion layer, optionally wherein the stabilisation layer is in direct contact with the base layer.
11 . A coated glass pane according to claim 10 , wherein the coating further comprises a separation layer between the stabilisation layer and the growth promotion layer, optionally wherein the separation layer is in direct contact with the stabilisation layer.
12 . A coated glass pane according to claim 1 , wherein the coating further comprises a barrier layer between the silver-based functional layer and the upper dielectric layer, optionally wherein the barrier layer is in direct contact with the silver-based functional layer.
13 . A coated glass pane according to claim 12 , wherein the coating further comprises a second silver-based functional layer between the silver-based functional layer and the upper dielectric layer, optionally wherein the coating further comprises a central dielectric layer between the silver-based functional layer and the second silver-based functional layer and/or a second barrier layer between the second silver-based functional layer and the upper dielectric layer.
14 . A coated glass pane according to claim 13 , wherein the coating further comprises a third silver-based functional layer between the second silver-based functional layer and the upper dielectric layer, optionally wherein the coating further comprises a second central dielectric layer between the second silver-based functional layer and the third silver-based functional layer and/or a third barrier layer between the third silver-based functional layer and the upper dielectric layer.
15 . A coated glass pane according to claim 1 , wherein the coated glass pane has a Rg a* of from −6 to +6.5 and Rg b* of from −14 to −2.5.
16 . A coated glass pane according to claim 1 , wherein the sheet resistance Rs is less than 8 Ω/□.
17 . A coated glass pane according to claim 1 , wherein the coated glass pane is a heat treatable coated glass pane.
18 . A coated glass pane according to claim 1 , wherein the coated glass pane is a heat treated coated glass pane, optionally wherein the heat treated coated glass pane is a thermally bent coated glass pane and/or a thermally strengthened coated glass pane.
19 . A coated glass pane according to claim 18 , wherein the heat treated coated glass pane has a change in colour characteristics AE* compared to a comparable annealed coated glass pane of less than or equal to 3.
20 . A coated glass pane according to claim 18 , with a haze scan value of less than 90.
21 . A coated glass pane according to claim 1 , wherein the atomic proportion of Zr based on Zr and Ti in the base layer, calculated as x/(x+y), is from 0.60 to 0.80.
22 . A multiple glazing unit comprising a coated glass pane according to claim 1 , preferably wherein the multiple glazing unit is a laminated glazing unit and/or an insulated glazing unit.
23 . A method of manufacturing a coated glass pane according to claim 1 , comprising the steps of:
i) providing a glass substrate;
ii) providing a base layer;
iii) providing a silver-based functional layer; and
iv) providing an upper dielectric layer.
24 . A method of manufacturing a coated glass pane according to claim 23 , wherein the base layer, and/or the silver-based functional layer, and/or the upper dielectric layer are provided by physical vapour deposition.