Heat treatable coated article having titanium nitride and nickel chrome based IR reflecting layers
View Patent ↗Coated articles include two or more functional infrared (IR) reflecting layers 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) and at least another of the IR reflecting layers is of or including NiCr (e.g., NiCr, NiCrN x , NiCrMo, and/or NiCrMoN x ).
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 NiCr 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 NiCr;
a second 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;
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
wherein the coated article has: a visible transmission from about 12-70%, a glass side visible reflectance no greater than 14%, a film side visible reflectance no greater than about 16%, a glass side reflective a* value of from −8 to +1.6, and a film side reflective a* color value of from −8 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 IR reflecting layer comprising the nitride of titanium comprises TiN x , where x is from 0.8 to 1.2.
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 0.9 to 1.1.
5. The coated article of claim 1 , wherein the first IR reflecting layer contains from 0-8% oxygen (atomic %).
6. The coated article of claim 1 , wherein the first IR reflecting layer contains from 0-5% oxygen (atomic %).
7. The coated article of claim 1 , wherein the second IR reflecting layer contains from 0-5% oxygen (atomic %).
8. The coated article of claim 1 , wherein the second IR reflecting layer contains from 0-5% oxygen (atomic %).
9. The coated article of claim 1 , where each of the first and second IR reflecting layers comprise from 0-5% oxygen (atomic %).
10. The coated article of claim 1 , where the second IR reflecting layer consists essentially of the nitride of titanium.
11. The coated article of claim 1 , wherein the coating further comprises an overcoat comprising an oxide of zirconium.
12. The coated article of claim 1 , the first IR reflecting layer comprising NiCr is nitrided.
13. The coated article of claim 1 , wherein the first IR reflecting layer further comprises Mo.
14. The coated article of claim 1 , wherein the glass substrate is a clear glass substrate.
15. The coated article of claim 1 , wherein the glass substrate is a green glass substrate.
16. The coated article of claim 1 , wherein the coated article has a glass side reflective a* value of from −6 to +1.0, and a film side reflective a* value of from −6 to +1.0.
17. The coated article of claim 1 , wherein the coated article has a visible transmission from 15-36%.
18. The coated article of claim 1 , wherein the coated article has a glass side reflective b* value of from −14 to +9, and a film side reflective b* value of from −14 to +9.
19. The coated article of claim 1 , wherein the coated article has a glass side reflective b* value of from −9 to +4, and a film side reflective b* value of from −9 to +4.
20. 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.
21. 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.
22. The coated article of claim 1 , wherein the coated article is thermally tempered and has a ΔE* value (glass side reflective) of no greater than 3.0 after and/or due to the thermal tempering.
23. The coated article of claim 1 , wherein the coated article is a monolithic window.
24. 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 0.50.
25. The coated article of claim 1 , wherein the coated article measured monolithically has an LSG of at least 1.00.
26. The coated article of claim 1 , wherein the second IR reflecting layer comprising the nitride of titanium is at least 50 Å thicker than the first IR reflecting layer comprising NiCr.
27. The coated article of claim 1 , wherein the second IR reflecting layer comprising the nitride of titanium is at least 100 Å thicker than the first IR reflecting layer comprising NiCr.
28. 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.
29. The coated article of claim 1 , wherein the first IR reflecting layer directly contacts the first dielectric layer.
30. The coated article of claim 1 , wherein the first IR reflecting layer comprising NiCr is from about 40-85 Å thick, and the second IR reflecting layer comprising the nitride of titanium is from about 130-300 Å thick.
31. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer;
a first infrared (IR) reflecting layer comprising Ni and Cr on the glass substrate over at least the first dielectric layer;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first dielectric and the first IR reflecting layer;
a second 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;
a third dielectric layer 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
wherein the coated article measured monolithically has: a visible transmission from about 12-70%, a glass side visible reflectance no greater than 14%, a film side visible reflectance no greater than about 16%, a glass side reflective a* value of from −8 to +1.6, and a film side reflective a* color value of from −8 to +1.6.
32. The coated article of claim 31 , wherein the coating contains only two IR reflecting layers.
33. The coated article of claim 31 , wherein the second layer IR reflecting layer comprising the nitride of titanium comprises TiN x , where x is from 0.8 to 1.2.
34. The coated article of claim 31 , wherein the first and second IR reflecting layers each contain from 0-5% oxygen (atomic %).
35. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer;
a first infrared (IR) reflecting layer comprising NiCr on the glass substrate over at least the first dielectric layer;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first dielectric and the first IR reflecting layer;
a second 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;
a third dielectric layer 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
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 14%, (b) a film side visible reflectance no greater than about 16%, (c) a glass side reflective a* value of from −8 to +1.6, and (b) a film side reflective a* color value of from −8 to +1.6.