Glazing panel having solar screening properties
A glazing panel having beneficial anti-solar properties comprises a vitreous substrate carrying a tin/antimony oxide coating layer containing tin and antimony in a Sb/Sn molar ratio of from 0.01 to 0.14. In one application the coated substrate has a solar factor FS of less than 70% and the panel is formed by chemical vapor deposition from a reactant mixture comprising a source of tin and a source of antimony. In another application it is particularly suitable for use in vehicle glazing, in particular in vehicle roof windows, and the coated substrate has a spray-formed pyrolytic tin/antimony oxide coating having a thickness of at least 400 nm and, whereby the coated substrate has a luminous transmittance (TL) of less than 35% and a selectivity (TL/TE) of at least 1.3.
1. A glazing panel comprising a vitreous substrate carrying a tin/antimony oxide coating layer containing tin and antimony in a Sb/Sn molar ratio of from 0.01 to 0.5, the said coating layer having been formed by chemical vapor deposition, whereby the so-coated substrate has a solar factor (FS) of less than 70% and a luminous transmittance (TL) of less than 70%.
2. A glazing panel according to claim 1 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.5.
3. A glazing panel according to claim 1 , wherein the Sb/Sn molar ratio ranges from 0.05 to 0.5.
4. A glazing panel according to claim 1 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.21.
5. A glazing panel according to claim 1 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.15.
6. A glazing panel according to claim 1 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.07.
7. A glazing panel according to claim 1 , wherein at least one intermediate coating layer is positioned between the substrate and the tin/antimony oxide coating layer, the at least one intermediate coating layer being selected from the group consisting of a haze-reducing coating layer and an anti-reflection layer.
8. A glazing panel according to claim 1 , wherein at least one intermediate coating layer is positioned between the substrate and the tin/antimony oxide coating layer, the at least one intermediate coating layer being comprised of one of SiO 2 and SiO x .
9. A glazing panel according to claim 1 , wherein the solar factor is less than 60%.
10. A glazing panel according to claim 1 , having a luminous transmittance of between 40 and 65%.
11. A glazing panel according to claim 1 , wherein the said tin/antimony oxide coating has a thickness of from 100 to 500 nm.
12. A glazing panel according to claim 1 , wherein the tin/antimony oxide coating has a thickness of from 250 to 450 nm.
13. A glazing panel according to claim 1 , wherein the tin/antimony oxide coating layer is an exposed coating layer.
14. A glazing panel according to claim 1 , wherein the vitreous substrate is selected from the group consisting of a clear sheet of glass and a colored sheet of glass.
15. A glazing panel comprising a vitreous substrate carrying a tin/antimony oxide coating layer containing tin and antimony in a Sb/Sn molar ratio of from 0.03 to 0.5, the said coating layer having been formed by chemical vapor deposition, whereby the so-coated substrate has a solar factor (FS) of less than 70%.
16. A glazing panel according to claim 15 , wherein the Sb/Sn molar ratio ranges from 0.05 to 0.5.
17. A glazing panel according to claim 15 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.21.
18. A glazing panel according to claim 15 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.15.
19. A glazing panel according to claim 15 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.07.
20. A glazing panel according to claim 15 , wherein at least one intermediate coating layer is positioned between the substrate and the tin/antimony oxide coating layer, the at least one intermediate coating layer being selected from the group consisting of a haze-reducing coating layer and an anti-reflection layer.
21. A glazing panel according to claim 15 , wherein at least one intermediate coating layer is positioned between the substrate and the tin/antimony oxide coating layer, the at least one intermediate coating layer being comprised of one of SiO 2 and SiO x .
22. A glazing panel according to claim 15 , wherein the solar factor is less than 60%.
23. A glazing panel according to claim 15 , having a luminous transmittance (TL) of less than 70%.
24. A glazing panel according to claim 15 , having a luminous transmittance of between 40 and 65%.
25. A glazing panel according to claim 15 , wherein the said tin/antimony oxide coating has a thickness of from 100 to 500 nm.
26. A glazing panel according to claim 15 , wherein the tin/antimony oxide coating has a thickness of from 250 to 450 nm.
27. A glazing panel according to claim 15 , wherein the tin/antimony oxide coating layer is an exposed coating layer.
28. A glazing panel according to claim 15 , wherein the vitreous substrate is selected from the group consisting of a clear sheet of glass and a colored sheet of glass.
29. A glazing panel comprising a vitreous substrate carrying, in order, an intermediate haze-reducing coating layer and a tin/antimony oxide coating layer containing tin and antimony in a Sb/Sn molar ratio of from 0.03 to 0.15, the said tin/antimony oxide coating layer having been formed by chemical vapor deposition and having a thickness of from 100 to 470 nm, whereby the so-coated substrate has a solar factor (FS) of less than 70% and a luminous transmittance (TL) of less than 70%.
30. A glazing panel according to claim 29 , wherein the Sb/Sn molar ratio ranges from 0.03 to 0.07.
31. A glazing panel according to claim 29 , wherein the intermediate haze-reducing coating layer comprises of one of SiO 2 and SiO x .
32. A glazing panel according to claim 29 , wherein the solar factor is less than 60%.
33. A glazing panel according to claim 29 , having a luminous transmittance of between 40 and 65%.
34. A glazing panel according to claim 29 , wherein the tin/antimony oxide coating has a thickness of from 250 to 450 nm.
35. A glazing panel according to claim 29 , wherein the tin/antimony oxide coating layer is an exposed coating layer.
36. A glazing panel according to claim 29 , wherein the vitreous substrate is selected from the group consisting of a clear sheet of glass and a colored sheet of glass.