# US 10,865,138 B2 · Infrared mirror with a thermally stable layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,138 B2 - Document ID: US10865138B2 - Status: Granted - Kind: B2 - Application number: 15/391,951 - Filed: 2016-12-28 - Published: 2018-08-16 - Granted: 2020-12-15 - Earliest claimed: 2015-12-28 - Assignees: Oerlikon Surface Solutions AG, PfäFfikon - Applicants: Oerlikon Surface Solutions AG, Pfaffikon - Inventors: Juergen Ramm; Othmar Zueger; Beno Widrig; Helmut Rudigier - Web page: https://patentgrep.com/patent/US10865138B2 ## CPC - C03C 17/366: {Low-emissivity or solar control coatings} - C03C 17/3618: {Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic} - C03C 17/3626: {one layer at least containing a nitride, oxynitride, boronitride or carbonitride} - C03C 17/3644: {the metal being silver} - C23C 4/11: Oxides - F23C 99/00: Subject-matter not provided for in other groups of this subclass - G02B 5/0808: {having a single reflecting layer (G02B5/0883, G02B5/0891 take precedence)} - G02B 5/0858: {the reflecting layers comprising a single metallic layer with one or more dielectric layers} - G02B 5/0875: {the reflecting layers comprising two or more metallic layers} - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - G02B 5/26: Reflecting filters (G02B5/28 takes precedence) - G02B 5/282: {reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection} - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Component surfaces are coated with thermally stable layers. In particular infrared mirror surfaces or surfaces of combustion chambers are coated with at least one layer consisting of thermally stable Al—Cr—O in such a manner that the absorption, reflection or transmission of infrared radiations (hereinafter also called thermal radiations) is influenced. ## Claims ### Claim 1 A component comprising: an infrared (IR) mirror having a surface; and a coating on the surface comprising an oxide layer, and the oxide layer is a temperature-stable Al—Cr—O layer, wherein the temperature-stable Al—Cr—O layer has a layer thickness that is thinner than typical wavelengths of the IR radiation, and a concentration of aluminum in the temperature-stable Al—Cr—O layer is between 1 at % and 70 at %, wherein the at % range is defined as an amount of aluminum as a percentage of a total amount of aluminum and chromium. ### Claim 2 (depends on 1) A component according to claim 1, wherein the coating is a multi-layer system comprising a layer of TiN, wherein the temperature-stable Al—Cr—O layer is applied on the TiN layer. ### Claim 3 (depends on 1) A component according to claim 1, wherein the temperature-stable Al—Cr—O layer is applied as an outmost cover layer of the coating. ### Claim 4 (depends on 1) A component according to claim 1, wherein the layer thickness of the temperature-stable Al—Cr—O layer is less than 1000 nm. ### Claim 5 (depends on 4) A component according to claim 4, wherein the coating is a multi-layer system comprising a layer of TiN, wherein the temperature-stable Al—Cr—O layer is applied on the TiN layer. ### Claim 6 (depends on 5) A component according to claim 5, further comprising a combustion chamber, wherein the IR mirror is provided on the combustion chamber. ### Claim 7 (depends on 5) A component according to claim 5, further comprising a reactor, wherein the IR mirror is provided on the reactor. ### Claim 8 (depends on 1) A method for producing a component according to claim 1, comprising the steps: providing a component with a surface intended to comprise the IR mirror, depositing the coating comprising the temperature-stable Al—Cr—O layer, wherein the temperature-stable Al—Cr—O layer is deposited by reactive cathodic arc evaporation or by a sputter coating method. ### Claim 9 (depends on 1) A component according to claim 1, further comprising a combustion chamber, wherein the IR mirror is provided on the combustion chamber. ### Claim 10 (depends on 1) A component according to claim 1, further comprising a reactor, wherein the IR mirror is provided on the reactor. ### Claim 11 An apparatus comprising a combustion chamber, the combustion chamber having an inner wall, at least a part of the inner wall being provided with an infrared (IR) mirror having a surface; and a coating on the surface comprising an oxide layer, and the oxide layer is a temperature-stable Al—Cr—O layer, wherein the temperature-stable Al—Cr—O layer has a layer thickness that is thinner than typical wavelengths of the IR radiation, and a concentration of aluminum in the temperature-stable Al—Cr—O layer is between 1 at % and 70 at %, wherein the at % range is defined as an amount of aluminum as a percentage of a total amount of aluminum and chromium.