Heat treatable coated article having titanium nitride based IR reflecting layer(s)
View Patent ↗Coated articles include at least one functional infrared (IR) reflecting layer(s) sandwiched between at least dielectric layers. The dielectric layers may be of or including silicon nitride or the like. At least one of the IR reflecting layers is of or including titanium nitride (e.g., TiN).
1. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer comprising silicon nitride;
a first infrared (IR) reflecting layer comprising a nitride of titanium on the glass substrate over at least the first dielectric layer comprising silicon nitride;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first dielectric layer comprising silicon nitride and the first IR reflecting layer comprising the nitride of titanium;
a second layer IR reflecting layer comprising a nitride of titanium on the glass substrate over at least the second dielectric layer comprising silicon nitride;
wherein the second dielectric layer comprising silicon nitride is located between and directly contacting the first and second IR reflecting layers comprising nitride of titanium;
a third dielectric layer comprising silicon nitride on the glass substrate over at least the second IR reflecting layer comprising the nitride of titanium;
wherein the coating contains no IR reflecting layer based on silver, and contains only two IR reflecting layers; and
wherein the coated article measured monolithically has: a visible transmission from about 12-70%, a glass side visible reflectance no greater than 14%, and a glass side reflective a* value of from −10 to +1.6.
2. The coated article of claim 1 , wherein the coating contains only two IR reflecting layers.
3. The coated article of claim 1 , wherein the second dielectric layer comprising silicon nitride is located between and directly contacting the first and second IR reflecting layers.
4. The coated article of claim 1 , wherein the second IR reflecting layer comprising the nitride of titanium comprises TiN x , where x is from 0.8 to 1.2.
5. The coated article of claim 1 , wherein the second IR reflecting layer comprising the nitride of titanium comprises TiN x , where x is from 0.9 to 1.1.
6. The coated article of claim 1 , wherein each of the first and second IR reflecting layers comprise TiN x , where x is from 0.8 to 1.2.
7. The coated article of claim 1 , wherein each of the first and second IR reflecting layers comprise TiN x , where x is from 0.9 to 1.1.
8. The coated article of claim 1 , wherein the first IR reflecting layer contains from 0-8% oxygen (atomic %).
9. The coated article of claim 1 , wherein the first IR reflecting layer contains from 0-5% oxygen (atomic %).
10. The coated article of claim 1 , wherein the second IR reflecting layer contains from 0-8% oxygen (atomic %).
11. The coated article of claim 1 , wherein the second IR reflecting layer contains from 0-5% oxygen (atomic %).
12. The coated article of claim 1 , where each of the first and second IR reflecting layers comprise from 0-5% oxygen (atomic %).
13. The coated article of claim 1 , wherein the coated article measured monolithically has a film side visible reflectance no greater than about 16%.
14. The coated article of claim 13 , wherein measured monolithically the coated article has a film side reflective a* color value of from −8 to +1.6.
15. The coated article of claim 14 , wherein the second IR reflecting layer is at least 20% thicker than the first IR reflecting layer.
16. The coated article of claim 14 , wherein the second IR reflecting layer is at least 40% thicker than the first IR reflecting layer.
17. The coated article of claim 1 , wherein the second IR reflecting layer is physically thicker than the first IR reflecting layer by at least 50 angstroms (Å).
18. The coated article of claim 1 , wherein the second IR reflecting layer is physically thicker than the first IR reflecting layer by at least 100 Å.
19. The coated article of claim 1 , wherein the second IR reflecting layer is physically thicker than the first IR reflecting layer by at least 150 Å.
20. The coated article of claim 1 , where the second IR reflecting layer consists essentially of the nitride of titanium.
21. The coated article of claim 1 , wherein the coating further comprises an overcoat comprising an oxide of zirconium.
22. The coated article of claim 1 , wherein the glass substrate is a clear glass substrate.
23. The coated article of claim 1 , wherein the coated article measured monolithically has a glass side reflective a* value of from −8 to +1.5, and a film side reflective a* value of from −8 to +1.5.
24. The coated article of claim 1 , wherein the coated article has a visible transmission from 15-36%.
25. The coated article of claim 1 , wherein the coated article has a glass side reflective b* value of from −12 to +4, and a film side reflective b* value of from −20 to +9.
26. The coated article of claim 1 , wherein the coating consists essentially of the first, second and third dielectric layers comprising silicon nitride and the first and second IR reflecting layers, and may optionally comprise an overcoat comprising an oxide of zirconium.
27. The coated article of claim 1 , wherein one or more of the first, second, and third dielectric layers comprising silicon nitride further comprises oxygen and is doped with aluminum.
28. The coated article of claim 1 , wherein the coated article is thermally tempered.
29. The coated article of claim 1 , wherein the coated article is a monolithic window.
30. The coated article of claim 1 , wherein the coated article measured monolithically has an SHGC value of no greater than 0.52, a normal emittance (E n ) of no greater than 0.50, and an LSG of at least 0.70.
31. The coated article of claim 1 , wherein the coated article measured monolithically has an SHGC value of no greater than 0 25, a normal emittance (E n ) of no greater than 0.28, and an LSG of at least 0.70.
32. The coated article of claim 1 , wherein the coated article measured monolithically has an LSG of at least 1.00.
33. The coated article of claim 1 , wherein the second dielectric layer comprising silicon nitride is at least 100 Å thicker than the first dielectric layer comprising silicon nitride.
34. The coated article of claim 1 , wherein the first IR reflecting layer directly contacts the first dielectric layer.
35. The coated article of claim 1 , wherein the first IR reflecting layer is from about 140-300 Å thick, and the second IR reflecting layer comprising the nitride of titanium is from about 200-400 Å thick.
36. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer comprising silicon nitride;
a first infrared (IR) reflecting layer comprising a nitride of titanium on the glass substrate over at least the first dielectric layer comprising silicon nitride;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first dielectric layer comprising silicon nitride and the first IR reflecting layer comprising the nitride of titanium;
a second layer IR reflecting layer comprising a nitride of titanium on the glass substrate over at least the second dielectric layer comprising silicon nitride;
wherein the second dielectric layer comprising silicon nitride is located between and directly contacting the first and second IR reflecting layers comprising nitride of titanium;
a third dielectric layer comprising silicon nitride on the glass substrate over at least the second IR reflecting layer comprising the nitride of titanium;
wherein the coating contains no IR reflecting layer based on silver, and contains only two IR reflecting layers; and
wherein the coated article measured monolithically has a visible transmission from about 12-70% and one or more of: (a) a glass side visible reflectance no greater than about 16%, (b) a glass side reflective a* value of from −10 to +1.6, (c) a film side visible reflectance no greater than about 16%, and (d) a film side reflective a* color value of from −8 to +1.6.
37. The coated article of claim 36 , wherein the second IR reflecting layer is at least 20% thicker than the first IR reflecting layer.
38. The coated article of claim 36 , wherein the second IR reflecting layer is at least 40% thicker than the first IR reflecting layer.