Solar control coatings with discontinuous metal layer
An architectural transparency includes a substrate, a first dielectric layer formed over at least a portion of the substrate, a subcritical metallic layer formed over at least a portion of the first dielectric layer, a primer layer formed over the subcritical metallic layer and, a second dielectric layer formed over at least a portion of the primer layer. The primer layer contains an oxygen-capturing material that can be sacrificed during a deposition process or heating process to prevent degradation of the subcritical metallic layer.
1. A coated article, comprising:
a substrate; and
a coating over at least a portion of the substrate, the coating comprising:
a first dielectric layer formed over at least a portion of the substrate, wherein the first dielectric layer comprises a first film and a second film;
a first continuous metallic layer over the first dielectric layer;
a first primer layer over the first continuous metallic layer;
a second dielectric layer over the first primer layer comprises a first metal oxide film and a second metal alloy oxide film;
a second discontinuous metallic layer over the second dielectric layer;
a second primer over the second discontinuous metallic layer;
a third dielectric layer over the second primer layer, wherein the third dielectric layer comprises a first metal oxide layer, and a second metal alloy oxide-containing layer;
a third continuous metallic layer over the third dielectric layer;
a third primer layer over the third continuous metallic layer;
a fourth dielectric layer over the third primer layer, wherein the fourth dielectric layer comprises a first metal oxide film and a second metal alloy oxide film; and
a protective coating comprising titania over the fourth dielectric coating.
2. The article of claim 1 , wherein the second discontinuous metallic layer has an effective thickness of less than 50 Å.
3. The article of claim 1 , wherein the second dielectric layer further comprises a third metal oxide film deposited over the second metal alloy oxide film.
4. The article of claim 1 , wherein the third dielectric layer further comprises a third metal oxide film deposited over the second metal alloy oxide film.
5. The article of claim 1 , wherein the second primer has a thickness of 5 Å to 50 Å.
6. The article of claim 1 , wherein the first film of the first dielectric layer comprises a metal alloy oxide.
7. The article of claim 1 , wherein the first film of the first dielectric layer comprises a zinc/tin alloy oxide.
8. The article of claim 1 , wherein the first film of the first dielectric layer comprises zinc stannate.
9. The article of claim 1 , wherein the second film of the first dielectric layer comprises a metal oxide.
10. The article of claim 1 , wherein the second film of the first dielectric layer comprises a zinc oxide.
11. The article of claim 1 , wherein the a first continuous metallic layer comprises silver.
12. The article of claim 1 , wherein the first primer layer comprises titanium.
13. The article of claim 1 , wherein the first metal oxide film of the second dielectric layer comprises zinc oxide.
14. The article of claim 1 , wherein the second metal alloy oxide film of the second dielectric layer comprises zinc stannate.
15. The article of claim 1 , wherein the second discontinuous metallic layer comprises silver.
16. The article of claim 1 , wherein the second primer layer comprises titanium.
17. The article of claim 1 , wherein the first metal oxide layer of the third dielectric layer comprises zinc oxide.
18. The article of claim 1 , wherein the second metal alloy oxide-containing layer of the third dielectric layer comprises zinc stannate.
19. The article of claim 1 , wherein the third metallic layer comprises silver.
20. The article of claim 1 , wherein:
wherein the first film of the first dielectric layer comprises zinc stannate, and the second film of the first dielectric layer comprises zinc oxide;
the first continuous metallic layer comprises silver;
the first primer layer comprises titanium;
the first metal oxide film of the second dielectric layer comprises zinc oxide and the second metal alloy oxide film of the second dielectric layer comprises zinc stannate;
the second discontinuous metallic layer comprises silver;
the second primer comprises titanium;
the first metal oxide layer of the third dielectric layer comprises zinc oxide, and the second metal alloy oxide-containing layer of the third dielectric layer comprise zinc stannate;
the third continuous metallic layer comprises silver;
the third primer layer comprises titanium;
and the first metal oxide film of the fourth dielectric comprises zinc oxide and the second metal alloy oxide film of the fourth dielectric comprises zinc stannate.