Low-radiation coated glass

Abstract

The utility model provides low-emissivity coated glass. The low-emissivity coated glass comprises a glass substrate, and a bottom composite dielectric layer, a first niobium-containing infrared reflecting layer, a second composite dielectric layer, a second niobium-containing infrared reflecting layer and a third composite dielectric layer which are sequentially stacked on the glass substrate, the niobium-containing infrared reflecting layer is arranged to replace precious metal ITO and silver, so that the material cost can be reduced, and meanwhile, the oxidation resistance, the film adhesion, the product weather resistance and the processing adaptability of the glass surface film are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of heat-reflective glass technology, and in particular to a low-emissivity coated glass. Background Technology

[0002] In industries such as construction, automotive, and electronics manufacturing, coating technology for glass and other transparent materials has been widely used. Coating glass can improve its light transmittance and aesthetics, and can also give it special functions such as heat insulation, UV protection, and low reflectivity.

[0003] Existing glass coating technologies mainly achieve various special functions by depositing multiple thin films on the glass surface using vacuum magnetron sputtering technology. The low-emissivity function of glass is generally achieved using a silver layer or an indium tin oxide layer. However, the silver layer is easily oxidized and cannot be used alone, while the indium tin oxide layer has high preparation costs and certain limitations in adjusting visible light transmittance. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a low-emissivity coated glass. This application sets up a niobium-containing infrared reflective layer to replace the precious metals ITO and silver, which can reduce material costs while effectively improving the oxidation resistance, adhesion, weather resistance, and processing adaptability of the glass surface coating.

[0005] This application provides a low-emissivity coated glass, comprising a glass substrate and a bottom composite dielectric layer, a first niobium-containing infrared reflective layer, a second composite dielectric layer, a second niobium-containing infrared reflective layer, and a third composite dielectric layer sequentially stacked on the glass substrate.

[0006] Furthermore, the thickness of the first niobium-containing infrared reflective layer is greater than the thickness of the second niobium-containing infrared reflective layer.

[0007] Furthermore, the coated glass also includes a third niobium-containing infrared reflective layer and a fourth composite dielectric layer, which are stacked sequentially on the outside of the third composite dielectric layer.

[0008] Furthermore, the thickness of the first niobium-containing infrared reflective layer is greater than the thickness of the third niobium-containing infrared reflective layer.

[0009] Furthermore, the thickness of the second niobium-containing infrared reflective layer is greater than or equal to the sum of the thicknesses of the first niobium-containing infrared reflective layer and the third niobium-containing infrared reflective layer.

[0010] Furthermore, the coated glass also includes a protective layer disposed on the outside of the third composite dielectric layer. The thickness of the bottom composite dielectric layer is 40nm-65nm, the thickness of the first niobium-containing infrared reflective layer is 7nm-17nm, the thickness of the second composite dielectric layer is 55nm-70nm, the thickness of the second niobium-containing infrared reflective layer is 15nm-45nm, the thickness of the third composite dielectric layer is 45nm-60nm, the thickness of the third niobium-containing infrared reflective layer is 5nm-15nm, the thickness of the fourth composite dielectric layer is 50nm-70nm, and the thickness of the protective layer is less than or equal to 3nm.

[0011] Furthermore, the thickness of the bottom composite dielectric layer is 55nm-75nm, the thickness of the first niobium-containing infrared reflective layer is 15nm-25nm, the thickness of the second composite dielectric layer is 50nm-65nm, the thickness of the second niobium-containing infrared reflective layer is 5nm-15nm, and the thickness of the third composite dielectric layer is 55nm-65nm.

[0012] Furthermore, the coated glass also includes an absorption layer and a fourth composite dielectric layer. The absorption layer is disposed outside the third composite dielectric layer, and the fourth composite dielectric layer is disposed outside the absorption layer. The thickness of the absorption layer is 10nm-20nm, and the thickness of the fourth composite dielectric layer is 40nm-50nm.

[0013] Furthermore, the coated glass also includes a protective layer disposed on the outside of the third composite dielectric layer, and the thickness of the protective layer is less than or equal to 3 nm.

[0014] Furthermore, the niobium material of the first niobium-containing infrared reflective layer is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%; and / or, the niobium material of the second niobium-containing infrared reflective layer is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%.

[0015] This application proposes a low-emissivity coated glass, which has the following advantages compared with the prior art:

[0016] The low-emissivity coated glass of this application includes a glass substrate and a bottom composite dielectric layer, a first niobium-containing infrared reflective layer, a second composite dielectric layer, a second niobium-containing infrared reflective layer, and a third composite dielectric layer sequentially stacked on the glass substrate. This application provides multiple niobium-containing infrared reflective layers and multiple composite dielectric layers, which can effectively reduce emissivity and glass surface resistance, and effectively increase the thermal insulation performance of the glass substrate. The use of niobium-containing infrared reflective layers on the glass substrate can effectively improve the oxidation resistance, adhesion, weather resistance, and processing adaptability of the film layer on the glass substrate, and can effectively reduce material costs by replacing precious metals ITO and silver. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the membrane structure of one embodiment of this application;

[0018] Figure 2 for Figure 1 A schematic diagram showing an additional protective layer added to the outer side of the membrane structure;

[0019] Figure 3 This is a schematic diagram of the membrane structure of one embodiment of this application;

[0020] Figure 4 for Figure 3 A schematic diagram showing an additional protective layer added to the outer side of the membrane structure;

[0021] Figure 5 This is a schematic diagram of the membrane structure of one embodiment of this application;

[0022] Figure 6 for Figure 5 A schematic diagram showing an additional protective layer added to the outer side of the membrane structure;

[0023] The meanings of the reference numerals in the attached figures are as follows:

[0024] 1. Glass substrate; 2. Bottom composite dielectric layer; 3. First niobium-containing infrared reflective layer; 4. Second composite dielectric layer; 5. Second niobium-containing infrared reflective layer; 6. Third composite dielectric layer; 7. Third niobium-containing infrared reflective layer; 8. Fourth composite dielectric layer; 9. Absorption layer; 10. Protective layer. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, up, down, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The coated glass products involved in this application can be used in automotive sunroofs and rear windows. They can be used as single pieces, or clear glass can be used to replace tinted glass and transparent film can be used to replace heat-insulating gray film, thereby improving the stability of product quality, reducing secondary radiation generated by heat absorption by the glass, and realizing the replacement of double-film structure with single-film structure.

[0028] like Figures 1-6 As shown in the figure, this application embodiment proposes a low-emissivity coated glass, which is deposited on the surface of a glass substrate 1 by vacuum magnetron sputtering. The film structure includes at least one niobium-containing metal functional layer. Thus, the coated glass includes a glass substrate 1 and a bottom composite dielectric layer 2, a first niobium-containing infrared reflective layer 3, a second composite dielectric layer 4, a second niobium-containing infrared reflective layer 5, and a third composite dielectric layer 6, which are sequentially stacked on the glass substrate 1.

[0029] Based on the above technical solution, this application sets up multiple niobium-containing infrared reflective layers and multiple composite dielectric layers, which can effectively reduce emissivity and glass surface resistance, and effectively increase the thermal insulation performance of glass substrate 1. The use of niobium-containing infrared reflective layers in glass substrate 1 can effectively improve the oxidation resistance, adhesion, weather resistance and processing adaptability of the film layer of glass substrate 1, and replace precious metals ITO and silver, which can effectively reduce material costs.

[0030] One product form of this application uses a niobium-containing infrared reflective layer to replace the silver-containing film layer to achieve single-piece performance, with dual functions of sunshade and heat insulation. It does not require interlayer or thermal insulation film layer, reduces costs, and has a wide range of applications.

[0031] One product form of this application is as follows: the film layer can be coated on clear glass and made into laminated glass with transparent film and a piece of clear glass. The laminated glass has a transmittance of less than 4%, a glass surface reflection of less than 20%, a shading value Sc of less than 0.15, and the transmitted color is a neutral color, which is more aesthetically pleasing.

[0032] In this application, the niobium material of the first niobium-containing infrared reflective layer 3 is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%; and / or, the niobium material of the second niobium-containing infrared reflective layer 5 is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%.

[0033] Niobium alloys such as at least one of niobium-zirconium, niobium-titanium, and niobium-nickel, wherein the niobium content is not less than 85 wt%.

[0034] Low-emissivity films can be deposited on glass surfaces using vacuum magnetron sputtering. The film structure includes at least one niobium-containing metal functional layer. Using elemental niobium or a niobium alloy with a niobium content of not less than 85 wt% can effectively improve the film's oxidation resistance, adhesion, weather resistance, and processing adaptability.

[0035] All composite dielectric layers in this application may be one of silicon nitride, silicon oxide, silicon oxynitride, niobium oxide, zirconium oxide, tin oxide, zinc oxide, or zirconium oxynitride silicon, or may be formed by a composite of at least two of silicon nitride, silicon oxide, silicon oxynitride, niobium oxide, zirconium oxide, tin oxide, zinc oxide, or zirconium oxynitride silicon.

[0036] This application can use an offline Low-E plating method to achieve both ultra-low emissivity thermal insulation performance and single-piece usability, solving the problems of offline plating not being able to be used as a single piece and online Low-E having too high emissivity.

[0037] This application allows for the subdivision, optimization, and combination of interlayer efficacy in the selection and thickness of various film materials, thereby reducing the emissivity of the glass, improving the range of adjustable color diversity, and enhancing the heat resistance and robustness of the entire film structure. Furthermore, by combining multiple film layers with different absorption bands, flexible color adjustment of the transmitted color can be achieved. This film structure can be used to coat white glass substrates, thereby replacing the color coating of colored glass and solving the problems of shortage and high cost of colored substrates affecting delivery time.

[0038] This application can replace colored glass and heat-insulating film with clear glass and transparent film, which has less impact on the environment, better environmental protection, and lower material cost; this application has low emissivity and low surface resistivity, which can effectively increase heat insulation performance, reduce the air conditioning load in the vehicle, and is conducive to environmental protection and energy saving.

[0039] To ensure low emissivity, the total thickness of the functional layers must be ensured. To reduce visible light reflectivity, the thickness of the first niobium-containing infrared reflective layer 3 is greater than the thickness of the second niobium-containing infrared reflective layer 5.

[0040] If the thickness of the first niobium-containing infrared reflective layer 3 is less than the thickness of the second niobium-containing infrared reflective layer 5, the reflectivity of the glass substrate 1 will decrease, but the color of the film surface will deteriorate significantly, which will affect the appearance of the product.

[0041] In a preferred embodiment of this application (Embodiment 1), the thickness of the bottom composite dielectric layer 2 is 55nm-75nm, the thickness of the first niobium-containing infrared reflective layer 3 is 15nm-25nm, the thickness of the second composite dielectric layer 4 is 50nm-65nm, the thickness of the second niobium-containing infrared reflective layer 5 is 5nm-15nm, and the thickness of the third composite dielectric layer 6 is 55nm-65nm.

[0042] Furthermore, a protective layer 10 can be provided on the outer layer of this embodiment, and the thickness of the protective layer 10 is less than or equal to 3 nm.

[0043] In one preferred embodiment of Embodiment 1 of this application, the thicknesses of the bottom composite dielectric layer 2, the first niobium-containing infrared reflective layer 3, the second composite dielectric layer 4, the second niobium-containing infrared reflective layer 5, the third composite dielectric layer 6, and the protective layer 10 are 65nm, 20nm, 59nm, 9nm, 58nm, and 1nm, respectively. Correspondingly, the preferred materials for the bottom composite dielectric layer 2, the first niobium-containing infrared reflective layer 3, the second composite dielectric layer 4, the second niobium-containing infrared reflective layer 5, and the third composite dielectric layer 6 are silicon nitride, niobium-titanium alloy, silicon nitride, niobium-titanium alloy, silicon nitride, and zirconium oxide, respectively.

[0044] The coated glass product corresponding to Embodiment 1 of this application includes two niobium-containing infrared reflective layers with an emissivity of less than or equal to 0.25 and a surface resistivity of less than 20 ohms / m2, and can be used as a single piece.

[0045] To further improve the heat resistance of the coating on this coated glass and adjust the visible light transmittance, at least one absorption layer 9 can be added to the coating structure to absorb visible light, absorb some oxygen during heat treatment, and adjust the color of the coating.

[0046] In some embodiments, the coated glass further includes an absorption layer 9 and a fourth composite dielectric layer 8. The absorption layer 9 is disposed outside the third composite dielectric layer 6, and the fourth composite dielectric layer 8 is disposed outside the absorption layer 9. The thickness of the absorption layer 9 is 10nm-20nm, and the thickness of the fourth composite dielectric layer 8 is 40nm-50nm.

[0047] The absorption layer 9 can be a metal absorption layer 9, such as chromium or nickel-chromium alloy, titanium, etc.

[0048] The fourth composite dielectric layer 8 can be silicon nitride, zirconium nitride, etc.

[0049] If the absorption layer 9 is moved onto the second niobium-containing infrared reflective layer 5, although the transmittance decreases, the reflectivity of the film surface increases, the color value also deteriorates, and the overall appearance of the coated glass deteriorates.

[0050] In a preferred embodiment of this application (Embodiment 2), the thickness of the bottom composite dielectric layer 2 is 55nm-75nm, the thickness of the first niobium-containing infrared reflective layer 3 is 15nm-25nm, the thickness of the second composite dielectric layer 4 is 50nm-65nm, the thickness of the second niobium-containing infrared reflective layer 5 is 5nm-15nm, the thickness of the third composite dielectric layer 6 is 55nm-65nm, the thickness of the absorption layer 9 is 10nm-20nm, and the thickness of the fourth composite dielectric layer 8 is 40nm-50nm.

[0051] The coated glass product corresponding to Embodiment 2 of this application has lower transmittance and a more aesthetically pleasing film color.

[0052] One preferred embodiment of Embodiment 2 of this application: the thicknesses of the bottom composite dielectric layer 2, the first niobium-containing infrared reflective layer 3, the second composite dielectric layer 4, the second niobium-containing infrared reflective layer 5, the third composite dielectric layer 6, the absorption layer 9, and the fourth composite dielectric layer 8 are preferably 70nm, 20nm, 50nm, 13nm, 60nm, 15nm, and 45nm, respectively, and the corresponding materials are silicon nitride, niobium-titanium alloy, silicon nitride, niobium-titanium alloy, silicon nitride, nickel-chromium alloy, and zirconium-silicon nitride.

[0053] Furthermore, in order to improve the scratch resistance of the membrane structure and significantly enhance the heat resistance, scratch resistance and visible light transmittance of the membrane, a protective layer 10 can be added to the outer layer.

[0054] Specifically, the coated glass further includes a protective layer 10, which is disposed on the outside of the third composite dielectric layer 6. This protective layer 10 can improve the scratch resistance of the film structure, and the thickness of the protective layer 10 is less than or equal to 3 nm.

[0055] The protective layer 10 can be made of at least one of silicon nitride, zirconium oxide, silicon carbide and DLC (diamond-like coating).

[0056] Depending on the actual situation, an outer zirconium oxide protective layer 10 can be added to improve the processing resistance of the overall composite film, thereby ensuring the consistency and stability of the final product's various properties.

[0057] Furthermore, the coated glass also includes a third niobium-containing infrared reflective layer 7 and a fourth composite dielectric layer 8, which are stacked sequentially on the outside of the third composite dielectric layer 6.

[0058] This coated glass includes three niobium-containing infrared reflective layers with an emissivity of less than 0.2, and can be used as a single piece.

[0059] Specifically, the thickness of the first niobium-containing infrared reflective layer 3 is greater than the thickness of the third niobium-containing infrared reflective layer 7, and the thickness of the second niobium-containing infrared reflective layer 5 is greater than or equal to the sum of the thicknesses of the first niobium-containing infrared reflective layer 3 and the third niobium-containing infrared reflective layer 7. By increasing the thickness of the second niobium-containing infrared reflective layer 5, the light reflectivity of the glass surface of this coated glass can be significantly reduced, thus meeting the requirement of low reflectivity.

[0060] In a preferred embodiment of this application (Embodiment 3), the thickness of the bottom composite dielectric layer 2 is 40nm-65nm, the thickness of the first niobium-containing infrared reflective layer 3 is 7nm-17nm, the thickness of the second composite dielectric layer 4 is 55nm-70nm, the thickness of the second niobium-containing infrared reflective layer 5 is 15nm-45nm, the thickness of the third composite dielectric layer 6 is 45nm-60nm, the thickness of the third niobium-containing infrared reflective layer 7 is 5nm-15nm, and the thickness of the fourth composite dielectric layer 8 is 50nm-70nm.

[0061] The coated glass product corresponding to Embodiment 3 of this application includes three layers of niobium-containing infrared reflective layers with an emissivity of less than 0.2, and can be used as a single piece.

[0062] One preferred embodiment of Embodiment 3 of this application: the thicknesses of the bottom composite dielectric layer 2, the first niobium-containing infrared reflective layer 3, the second composite dielectric layer 4, the second niobium-containing infrared reflective layer 5, the third composite dielectric layer 6, the third niobium-containing infrared reflective layer 7, and the fourth composite dielectric layer 8 are preferably 55nm, 12nm, 60nm, 24nm, 55nm, 7nm, and 60nm, respectively, and the corresponding materials are silicon nitride, niobium-titanium alloy, silicon nitride, niobium-titanium alloy, silicon nitride, niobium-titanium alloy, and silicon nitride.

[0063] It should be emphasized that this application may also have more than three niobium-containing infrared reflective layers. Accordingly, more composite dielectric layers need to be set in order to pursue lower emissivity and transmittance. This application may not impose a quantity limit on niobium-containing infrared reflective layers. In other words, any product that stacks niobium-containing infrared reflective layers in quantity falls within the protection scope of this application.

[0064] Furthermore, a protective layer 10 can be added to the outside of this fourth composite dielectric layer 8 to improve the scratch resistance of the membrane structure.

[0065] In this application, the comparison of light transmittance and emissivity of Embodiments 1, 2, and 3 is shown in the table below:

[0066]

[0067] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0068] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0069] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A low-emissivity coated glass, characterized in that, It includes a glass substrate and a bottom composite dielectric layer, a first niobium-containing infrared reflective layer, a second composite dielectric layer, a second niobium-containing infrared reflective layer, and a third composite dielectric layer, which are sequentially stacked on the glass substrate.

2. The low-emissivity coated glass according to claim 1, characterized in that, The thickness of the first niobium-containing infrared reflective layer is greater than the thickness of the second niobium-containing infrared reflective layer.

3. The low-emissivity coated glass according to claim 1, characterized in that, The coated glass also includes a third niobium-containing infrared reflective layer and a fourth composite dielectric layer, which are stacked sequentially on the outside of the third composite dielectric layer.

4. The low-emissivity coated glass according to claim 3, characterized in that, The thickness of the first niobium-containing infrared reflective layer is greater than the thickness of the third niobium-containing infrared reflective layer.

5. The low-emissivity coated glass according to claim 4, characterized in that, The thickness of the second niobium-containing infrared reflective layer is greater than or equal to the sum of the thicknesses of the first niobium-containing infrared reflective layer and the third niobium-containing infrared reflective layer.

6. The low-emissivity coated glass according to any one of claims 3-5, characterized in that, The coated glass further includes a protective layer disposed on the outside of the third composite dielectric layer. The thickness of the bottom composite dielectric layer is 40nm-65nm, the thickness of the first niobium-containing infrared reflective layer is 7nm-17nm, the thickness of the second composite dielectric layer is 55nm-70nm, the thickness of the second niobium-containing infrared reflective layer is 15nm-45nm, the thickness of the third composite dielectric layer is 45nm-60nm, the thickness of the third niobium-containing infrared reflective layer is 5nm-15nm, the thickness of the fourth composite dielectric layer is 50nm-70nm, and the thickness of the protective layer is less than or equal to 3nm.

7. The low-emissivity coated glass according to claim 1, characterized in that, The thickness of the bottom composite dielectric layer is 55nm-75nm, the thickness of the first niobium-containing infrared reflective layer is 15nm-25nm, the thickness of the second composite dielectric layer is 50nm-65nm, the thickness of the second niobium-containing infrared reflective layer is 5nm-15nm, and the thickness of the third composite dielectric layer is 55nm-65nm.

8. The low-emissivity coated glass according to claim 1, characterized in that, The coated glass further includes an absorption layer and a fourth composite dielectric layer. The absorption layer is disposed outside the third composite dielectric layer, and the fourth composite dielectric layer is disposed outside the absorption layer. The thickness of the absorption layer is 10nm-20nm, and the thickness of the fourth composite dielectric layer is 40nm-50nm.

9. The low-emissivity coated glass according to claim 7, characterized in that, The coated glass further includes a protective layer disposed on the outside of the third composite dielectric layer, and the thickness of the protective layer is less than or equal to 3 nm.

10. The low-emissivity coated glass according to claim 1, characterized in that, The niobium material of the first niobium-containing infrared reflective layer is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%. And / or, the niobium material of the second niobium-containing infrared reflective layer is elemental niobium or a niobium alloy with a niobium content of not less than 85 wt%.

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