Coated article supporting high-entropy nitride and/or oxide thin film inclusive coating, and/or method of making the same
View Patent ↗Certain example embodiments relate to coated articles supporting high-entropy nitride and/or oxide thing film inclusive coatings, and/or methods of making the same. The example high-entropy alloys systems described herein are heat stable and may be used in optical coatings. A first material system that may be used in connection with certain example embodiments includes SiAlN with one or more (and preferably two or more) of elements such as Hf, Y, Zr, Ti, Ta, and Nb. A second material system that may be used in connection with certain example embodiments includes TiO, with one or more (and preferably two or more) of elements such as Fe, Co, Ni, Sn, Zn, and N. The material systems may in some cases be high-index materials that can serve as a substitute for titanium oxide in layer stacks, in some example applications.
1. A coated article comprising
a substrate;
and a low-emissivity (low-E) coating formed thereon on the substrate, the coating comprising an infrared (IR) reflecting layer comprising silver sandwiched between at least first and second dielectric layers; and
wherein at least one of the first and second dielectric layers of the low-E coating is a high entropy layer comprising a nitride of silicon and aluminum that further includes at least two of: Hafnium, Niobium, Tantalum, Titanium, Yttrium, and Zirconium.
2. The coated article of claim 1 , wherein the high entropy layer comprises at least two of Hafnium, Zirconium, and Yttrium.
3. The coated article of claim 1 , wherein the high entropy layer has a ΔHmix<−5.5 kJ/mol, ΔHmix>−49 kJ/mol, and an average atomic size difference of >7.
4. The coated article of claim 1 , wherein the high entropy layer has a ΔSmix>7 J/(mol*K), ΔSmix<16 J/(mol*K), and an average atomic size difference of >7.
5. The coated article of claim 1 , wherein the high entropy layer has an average atomic size difference between 7 and 20.
6. The coated article of claim 1 , wherein the high entropy layer is heat stable up to a temperature of 650° C. and for a time of up to 15 minutes.
7. The coated article of claim 1 , wherein the coated article is thermally temperable.
8. The coated article of claim 1 , wherein the high entropy layer is an outermost layer of the low-E coating.
9. The coated article of claim 1 , wherein the thin film coating is heat treatable and has a delta E* value of <2.
10. The coated article of claim 1 , wherein the high entropy layer has a thickness of 1-500 nm.
11. The coated article of claim 1 , wherein the high entropy layer has a thickness of 10-300 nm.
12. The coated article of claim 1 , wherein the coated article has at least 80% visible transmission.
13. The coated article of claim 1 , wherein the high entropy layer has an index of refraction of 1.8-2.4.