Low emissivity coating with low solar heat gain coefficient, enhanced chemical and mechanical properties and method of making the same
First Claim
1. A low-emissivity coating on a substrate, the coating consisting essentially of, in order outward from the substrate:
- a) a first dielectric layer;
b) a first nucleation layer;
c) a first Ag layer;
d) a first absorbing barrier layer comprising an oxide of nickel and chromium, wherein the first barrier layer comprises about 15 to 60 atomic percent oxygen;
e) a second dielectric layer;
f) a second nucleation layer;
g) a second Ag layer;
h) a second absorbing barrier layer;
i) a third dielectric layer; and
j) optionally, a topcoat layerwherein the coating has a visible transmission of less than about 69%.
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Abstract
The invention provides low-emissivity stacks being characterized by a low solar heat gain coefficient (SHGC), enhanced aesthetics, mechanical and chemical durability, and a tolerance for tempering or heat strengthening. The invention moreover provides low-emissivity coatings comprising, in order outward from the substrate a first dielectric layer; a first nucleation layer; a first Ag layer; a first barrier layer; a second dielectric layer; a second nucleation layer; a second Ag layer; a second barrier layer; a third dielectric layer; and optionally, a topcoat layer, and methods for depositing such coatings on substrates.
326 Citations
35 Claims
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1. A low-emissivity coating on a substrate, the coating consisting essentially of, in order outward from the substrate:
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a) a first dielectric layer; b) a first nucleation layer; c) a first Ag layer; d) a first absorbing barrier layer comprising an oxide of nickel and chromium, wherein the first barrier layer comprises about 15 to 60 atomic percent oxygen; e) a second dielectric layer; f) a second nucleation layer; g) a second Ag layer; h) a second absorbing barrier layer; i) a third dielectric layer; and j) optionally, a topcoat layer wherein the coating has a visible transmission of less than about 69%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A low-emissivity coating on a substrate, the coating consisting essentially of, in order outward from the substrate:
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a) a first dielectric layer comprising an oxynitride of Si and Al; b) a first nucleation layer comprising an oxide of Zn and Al; c) a first infrared reflecting layer comprising Ag; d) a first absorbing barrier layer comprising an oxide of Ni and Cr, wherein the first barrier layer comprises about 15-60 atomic percent oxygen; e) a second dielectric layer comprising an oxynitride of Si and Al; f) a second nucleation layer comprising an oxide of Zn and Al; g) a second infrared reflecting layer comprising Ag; h) a second absorbing barrier layer comprising an oxide of Ni and Cr; i) a third dielectric layer comprising an oxynitride of Si and Al; and j) optionally, a topcoat layer wherein the coating has a visible transmission of less than about 69%.
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Specification