Solar control coating with discontinuous metal layer
An architectural transparency includes a substrate; a first dielectric layer over at least a portion of the substrate, a first metallic layer over the first dielectric layer, a first primer layer over the first metallic layer, a second dielectric layer over the first primer layer, a second metallic layer over the second dielectric layer, a second primer layer over the second metallic layer, a third dielectric layer over the second primer layer, a third metallic layer over the third dielectric layer, a third primer layer over the third dielectric layer, and a fourth dielectric layer over the third primer layer. At least one of the metallic layers is a 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;
a first metallic layer over the first dielectric layer, wherein the first metallic layer is a continuous metallic layer;
a first primer layer over at least a portion of the first metallic layer;
a second dielectric layer over the first primer layer, wherein the second dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the second dielectric layer comprises zinc;
a second metallic layer over the second dielectric layer;
a third dielectric layer over the second metallic layer, wherein the third dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the third dielectric layer comprises zinc;
a third metallic layer over the third dielectric layer;
a third primer layer over at least a portion of the third metallic layer; and
a fourth dielectric layer over the third primer layer;
wherein at least one of the second metallic layer and third metallic layer is a discontinuous metallic layer; and
wherein at least one of the dielectric layers comprises zinc stannate.
2. The article of claim 1 , wherein the at least one discontinuous metallic layer has an effective thickness of less than 50 Å.
3. The article of claim 1 , wherein the first dielectric layer and/or the fourth dielectric layer comprise a first film and a second film deposited over the first film.
4. The article of claim 1 , wherein the first dielectric layer comprises a metal oxide, an oxide of a metal alloy, a nitride, an oxynitride, or a mixture thereof.
5. The article of claim 1 , wherein the first dielectric layer comprises silicon nitride, silicon aluminum nitride, aluminum nitride, zinc oxide, or zinc stannate.
6. The article of claim 1 , wherein the discontinuous metallic layer is selected from the group consisting of silver, gold, copper, palladium, and a mixture thereof.
7. The article of claim 1 , further comprising a protective coating over the fourth dielectric layer.
8. The article of claim 7 , wherein the protective coating comprises titania.
9. The article of claim 1 , wherein the second dielectric layer has a total thickness in a range of from 370 Å to 500 Å, and wherein the third dielectric layer has a total thickness in a range of from 400 Å to 760 Å.
10. The article of claim 1 , wherein the article has a film side reflectance greater than a glass side reflectance.
11. The article of claim 1 , wherein the article has a visible light transmittance of greater than 20%, and a solar heat gain coefficient of less than 0.3.
12. 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;
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, wherein the second dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the second dielectric layer comprises zinc;
a second discontinuous metallic layer over the second dielectric layer;
a third dielectric layer over the second discontinuous metallic layer, wherein the third dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the third dielectric layer comprises zinc;
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; and
a protective coating over the fourth dielectric layer;
wherein at least one of the dielectric layers comprises zinc stannate.
13. The article of claim 12 , wherein the second discontinuous metallic layer has an effective thickness of less than 50 Å.
14. The article of claim 12 , wherein the first dielectric layer and/or the fourth dielectric layer comprise a first film and a second film deposited over the first film.
15. The article of claim 12 , wherein the first dielectric layer comprises a metal oxide, an oxide of a metal alloy, a nitride, an oxynitride, or mixtures thereof.
16. The article of claim 12 , wherein the protective coating comprises titania, silica, alumina, or a mixture thereof.
17. 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 metal that is an oxide, an oxynitride, or a nitride, wherein the metal is selected from the group consisting of silicon, silicon-aluminum alloy or mixture, zinc, and zinc-tin alloy or mixture;
a first metallic layer over the first dielectric layer, wherein the first metallic layer is a continuous metallic layer and comprises silver, gold, copper, palladium or a mixture thereof;
a first primer layer over the first metallic layer;
a second dielectric layer over the first primer layer, wherein the second dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the second dielectric layer comprises zinc;
a second metallic layer over the second dielectric layer, wherein the second metallic layer comprises silver, gold, copper, palladium or a mixture thereof, and wherein the second metallic layer is a discontinuous metallic layer having an effective thickness of less than 50 Å;
a third dielectric layer over the second primer layer, wherein the third dielectric layer comprises a first metal oxide film, a second metal alloy oxide film, and a third metal oxide film, and wherein each film of the third dielectric layer comprises zinc;
a third metallic layer over the third dielectric layer, wherein the third metallic layer comprises silver, gold, copper, palladium or a mixture thereof;
a third primer layer over the third metallic layer; and
a fourth dielectric layer over the third primer layer, wherein the fourth dielectric layer comprises a metal that is an oxide, an oxynitride, or a nitride, wherein the metal is selected from the group consisting of silicon, silicon-aluminum alloy or mixture, zinc, and zinc-tin alloy or mixture;
wherein at least one of the dielectric layers comprises zinc stannate.
18. The article of claim 17 , wherein the first dielectric layer comprises zinc oxide.
19. The article of claim 17 , further comprising a protective coating over the fourth dielectric layer.
20. The article of claim 19 , wherein the protective coating comprises titania, silica, alumina, or a mixture thereof.