Coated article with and oxide of silicon zirconium or zirconium yttrium oxide in overcoat, and/or niobium nitrude in ir reflecting layer
View Patent ↗A coated article or layer system is provided which includes at least one infrared (IR) reflecting layer including niobium (Nb) sandwiched between at least a pair of dielectric layers. In certain embodiments, a Cr inclusive barrier layer is provided to protect the Nb inclusive IR reflecting layer, for chemical durability purposes. In other example embodiments, a protective overcoat including a zirconium oxide inclusive layer may be provided to protect the Nb inclusive IR reflecting layer for durability purposes.
1. A coated article including a layer system supported by a glass substrate, the layer system comprising:
an Nb or Ni inclusive IR reflecting layer located between at least first and second dielectric layers; and
a protective overcoat including a layer comprising an oxide of SiZr for protecting the Nb or Ni inclusive IR reflecting layer.
2. The coated article of claim 1 , wherein the IR reflecting layer comprises one of NiCr and Nb.
3. The coated article of claim 1 , further comprising a Cr inclusive barrier layer located over and directly contacting the Nb or Ni inclusive IR reflecting layer.
4. A coated article including a coating supported by a glass substrate, wherein the coating comprises:
an IR reflecting layer; and
an overcoat layer provided over the IR reflecting layer, wherein the overcoat layer comprises an oxide of ZrY.
5. The coated article of claim 4 , wherein the Y content of the overcoat layer is from 1 to 20%.
6. The coated article of claim 4 , wherein the Y content of the overcoat layer is from 5 to 15%.
7. The coated article of claim 4 , further comprising a layer comprising silicon nitride which is located immediately under and contacting the layer comprising the oxide of ZrY.
8. A coated article including a coating supported by a glass substrate, wherein the coating comprises:
an IR reflecting layer; and
an overcoat layer provided over the IR reflecting layer, wherein the overcoat layer comprises an oxide of SiZr.
9. The coated article of claim 8 , wherein the overcoat comprising the oxide of SiZr includes more Si than Zr.
10. The coated article of claim 8 , wherein in the overcoat comprising the oxide of SiZr, the non-oxygen content of the overcoat comprises from about 10–50% Zr.
11. The coated article of claim 8 , wherein the IR reflecting layer comprises one or more of Nb, Cr, and NiCr.
12. The coated article of claim 8 , wherein the coating further comprises a first dielectric layer between the glass substrate and the IR reflecting layer, and a second dielectric layer between the IR reflecting layer and the overcoat layer.
13. The coated article of claim 12 , wherein the first dielectric layer comprises silicon nitride.
14. The coated article of claim 12 , wherein the second dielectric layer comprises silicon nitride.