Glass coating as well as preparation method and application thereof

Abstract

The invention discloses a glass coating as well as a preparation method and application thereof, and relates to the technical field of coated glass, the glass coating comprises a first dielectric layer, a first protective layer, a first functional layer, a second protective layer, a second dielectric layer, a second functional layer, a third protective layer and a third dielectric layer which are sequentially stacked; the first dielectric layer is used for providing adhesive force for the glass coating, the second dielectric layer is used for regulating and controlling the interference effect of the glass coating, and the third dielectric layer is used for providing wear resistance for the glass coating; and the thickness ratio of the first dielectric layer to the second dielectric layer to the third dielectric layer is (1.8-2.2): (2-2.4): 1. The transmission colors of the bent tempered glass plated with the glass plating layer at the plane and the curved surface are consistent and are not too greenish, and meanwhile, the outdoor reflection color heights at all angles are consistent.

Description

Technical Field

[0001] This invention relates to the field of coated glass technology, and in particular to a glass coating, its preparation method, and its applications. Background Technology

[0002] With the increasingly widespread application of curved tempered glass in architecture, the requirements for its color, performance, and flatness / bending compatibility are also becoming more stringent. Double-silver Low-E glass is currently the mainstream product, and in terms of film structure, it is mainly divided into copper-added and non-copper-added types. Copper-added glass can effectively reduce the greenish tint of the transmitted color while ensuring film performance. However, because copper is not heat-resistant, copper-added structures cannot be used in the coating of curved tempered glass, resulting in a greenish tint in the transmitted color of existing curved tempered glass. Therefore, a glass coating suitable for curved tempered glass that also ensures consistent transmitted color is needed. Summary of the Invention

[0003] The main objective of this invention is to propose a glass coating, its preparation method, and its applications, aiming to solve the problem that existing coatings that can guarantee the uniformity of glass transmission color are not suitable for bent tempered glass.

[0004] To achieve the above objectives, the glass coating proposed in this invention includes a first composite layer, a second composite layer, and a third composite layer stacked sequentially. The first composite layer includes a first dielectric layer, a first protective layer, and a first functional layer stacked sequentially. The first dielectric layer is used to provide adhesion for the glass coating; the first protective layer is used to protect the first functional layer; and the first functional layer is used to reduce the emissivity of the glass coating. The second composite layer includes a second protective layer, a second dielectric layer, and a second functional layer stacked sequentially. The second protective layer is used to protect the first functional layer, the second dielectric layer is used to regulate the interference effect of the glass coating, and the second functional layer is used to reduce the emissivity of the glass coating. The third composite layer includes a third protective layer and a third dielectric layer stacked sequentially. The third protective layer is used to protect the second functional layer, and the third dielectric layer is used to provide wear resistance for the glass coating. The thickness ratio of the first dielectric layer, the second dielectric layer, and the third dielectric layer is 1.8~2.2:2~2.4:1.

[0005] Preferably, the thickness ratio of the first functional layer to the first protective layer is 1.8~2.2:1.

[0006] Preferably, the thickness ratio of the first protective layer to the second protective layer is 1.1 to 1.5:1.

[0007] Preferably, the first dielectric layer comprises SiO x Layer, SiN xLayer, ZnAlO x At least one of the layers; The second dielectric layer includes an AZO layer and a SiN layer. x Layer, ZnAlO x At least one of the layers; The third dielectric layer includes an AZO layer and a SiN layer. x layer, ZrO x At least one of the layers.

[0008] Preferably, the first dielectric layer comprises sequentially stacked SiO₂ layers. x Layer, SiN x Layer, ZnAlO x Layer, SiO in the first dielectric layer x Layers and SiN x The thickness ratio of the layers is 1~1.2:4~5.

[0009] Preferably, the first protective layer comprises at least one of a NiCr layer or a Ni layer; The first functional layer includes at least one of an Ag layer or a copper-nickel alloy layer; The second protective layer includes at least one of a NiCr layer or a Ni layer; The second functional layer includes at least one of an Ag layer or a copper-nickel alloy layer; The third protective layer includes at least one of a NiCr layer or a Ni layer.

[0010] Preferably, the thickness of the first dielectric layer is 50~75 nm; The thickness of the first protective layer is 3~6 nm; The thickness of the first functional layer is 6.5~13 nm; The thickness of the second protective layer is 3~5 nm; The thickness of the second dielectric layer is 70~90 nm; The thickness of the second functional layer is 9~15 nm; The thickness of the third protective layer is 1.5~5 nm; The thickness of the third dielectric layer is 25~45 nm.

[0011] The present invention also proposes a method for preparing the glass coating proposed in the present invention, comprising: sequentially forming the first composite layer, the second composite layer and the third composite layer on a glass substrate using magnetron sputtering.

[0012] Preferably, the target material for magnetron sputtering includes a silicon-aluminum target, a silver target, and a nickel-chromium target; The power of the silicon-aluminum target is 0~70 kW, the sputtering atmosphere includes argon and nitrogen, and the sputtering pressure is 2×10-3~5×10-3 mbar; The power of the silver target is 0~20 kW, the sputtering atmosphere includes argon, and the sputtering pressure is 2×10-3~5×10-3 mbar; The power of the nickel-chromium target is 0~20 kW, the sputtering atmosphere includes argon, and the sputtering pressure is 2×10-3~5×10-3 mbar.

[0013] The present invention also proposes an application of the glass coating proposed in the present invention, wherein the glass coating is used in tempered glass; Preferably, the tempered glass is curved tempered glass.

[0014] The glass coating of the present invention comprises a first dielectric layer, a first protective layer, a first functional layer, a second protective layer, a second dielectric layer, a second functional layer, a third protective layer, and a third dielectric layer stacked sequentially. The thickness ratio of the first dielectric layer, the second dielectric layer, and the third dielectric layer is 1.8~2.2:2~2.4:1. By adjusting the thickness ratio of the first dielectric layer, the second dielectric layer, and the third dielectric layer, the light interference effect of the glass coating is adjusted, thereby ensuring that the transmitted color of the curved tempered glass coated with the glass coating is consistent at both the flat and curved surfaces and is not too greenish, while also ensuring that the outdoor reflected color is highly consistent at all angles. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the glass coating provided by the present invention; Figure 2 Outdoor reflection (a*) test diagrams of tempered glass and non-tempered glass in one embodiment of the present invention; Figure 3 The outdoor reflection (b*) test diagrams of tempered glass and non-tempered glass in one embodiment of the present invention are shown.

[0017] Explanation of icon numbers: 100. Glass coating; 1. First composite layer; 11. First dielectric layer; 12. First protective layer; 13. First functional layer; 2. Second composite layer; 21. Second protective layer; 22. Second dielectric layer; 23. Second functional layer; 3. Third composite layer; 31. Third protective layer; 32. Third dielectric layer.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Glass, due to its excellent light transmission and ability to create a sense of space, as well as its versatility and adaptability to modern aesthetics, is currently widely used in high-end buildings. Statistics show that the annual glass consumption in the Chinese market is approximately 350 million square meters. With the increasing personalization and high demands of modern architecture, curved tempered glass is now widely used in modern buildings, and its proportion is increasing year by year. The development of curved tempered glass for architecture has mainly gone through several stages: initially, it was mainly used for special project shapes (building corners, elevator lobbies, curved doors, etc.), and later it was gradually applied to the exterior of building curtain walls, with its application becoming increasingly widespread.

[0023] With the increasingly widespread application of curved tempered glass in architecture, the requirements for its color, performance, and flat-to-curved compatibility are also becoming more stringent. Curved tempered glass with coatings has evolved from initial heat-reflective and single-silver designs to double-silver and triple-silver designs. Heat-reflective and single-silver glass are gradually fading from high-end projects due to their stringent performance requirements, being replaced by double-silver and triple-silver glass, with double-silver now becoming the dominant option. The combination of double-silver flat-to-curved glass has evolved from simply ensuring consistent outdoor color to demanding increasingly higher standards for indoor color consistency (transmitted color). Currently, double-silver glass on the market is mainly divided into two types based on its coating structure (some less common structures are not discussed in detail): copper-added and non-copper-added. The main function of copper-added glass is to adjust the transmitted color, effectively reducing the greenish tint while maintaining coating performance. However, because copper is not heat-resistant, copper-added coating structures cannot be used in the coating of curved tempered glass. Many existing flat-to-curved double-silver glass products exhibit a greenish tint in the transmitted color.

[0024] Based on this, please refer to Figure 1 This invention proposes a glass coating 100, which generally includes a first composite layer 1, a second composite layer 2, and a third composite layer 3 stacked sequentially. The first composite layer 1 includes a first dielectric layer 11, a first protective layer 12, and a first functional layer 13 stacked sequentially. The first dielectric layer 11 provides adhesion for the glass coating 100; the first protective layer 12 protects the first functional layer 13, and the first functional layer 13 reduces the emissivity of the glass coating 100. The second composite layer 2 includes a second protective layer 21, a second dielectric layer 22, and a second functional layer 23 stacked sequentially. The second protective layer 21 protects the first functional layer 13; the second dielectric layer 22 modulates the interference effect of the glass coating 100; and the second functional layer 23 reduces the emissivity of the glass coating 100. The third composite layer 3 includes a third protective layer 31 and a third dielectric layer 32 stacked sequentially. The third protective layer 31 protects the second functional layer 23, and the third dielectric layer 32 provides wear resistance to the glass coating 100. Furthermore, the thickness ratio of the first dielectric layer 11, the second dielectric layer 22, and the third dielectric layer 32 is (1.8~2.2):(2~2.4):1. For example, the thickness ratio of the first dielectric layer 11, the second dielectric layer 22, and the third dielectric layer 32 is 1.8:2:1, 2:2:1, 2.1:2.2:1, or 2.2:2.4:1, etc.

[0025] By adjusting the thickness ratio of the first dielectric layer 11, the second dielectric layer 22, and the third dielectric layer 32, the light interference effect of the glass coating 100 is adjusted, thereby ensuring that the transmitted color of the curved tempered glass coated with the glass coating 100 is consistent on both the flat and curved surfaces and is not too green, while also ensuring that the outdoor reflected color is highly consistent at all angles.

[0026] Specifically, the first dielectric layer 11 includes SiO2. x Layer, SiN x Layer, ZnAlO x At least one of the layers, the thickness of the first dielectric layer 11 is 50-75 nm. For example, the thickness of the first dielectric layer 11 can be 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, or 75 nm, etc. In some embodiments, the first dielectric layer 11 comprises SiO₂ stacked sequentially. x Layer, SiN x Layer, ZnAlO x Layers. Among them, SiO is the most common. x As the base layer, the first dielectric layer 11 has excellent high-temperature resistance. Silica has a high melting point, much higher than that of tempered glass, which can effectively protect the first functional layer 13. Furthermore, the bonding strength between silica and the glass substrate is much better than that of silicon nitride, which can effectively avoid demolding problems during subsequent processing and ensure the overall durability of the glass.

[0027] In some embodiments, SiO in the first dielectric layer 11 x Layers and SiN x The thickness ratio of the layers is (1~1.2):(4~5). For example, in the first dielectric layer 11, SiO x Layers and SiN x The thickness ratio of the layers is 1:4, 1.2:4, 1.1:4.5:1.2:4, or 1.2:5, etc. The first dielectric layer 11 with the above-mentioned thickness setting has the best structural stability, excellent high temperature resistance, and extremely strong adhesion to the glass substrate.

[0028] The first protective layer 12 includes at least one of a NiCr layer or a Ni layer, and the thickness of the first protective layer 12 is 3~6 nm, for example, the thickness of the first protective layer 12 can be 3 nm, 4 nm, 5 nm or 6 nm, etc. The main function of the first protective layer 12 is to protect the first functional layer 13 and prevent the first functional layer 13 from being oxidized in the high temperature environment of the thermal processing.

[0029] The first functional layer 13 includes at least one of an Ag layer or a copper-nickel alloy layer, with a thickness of 6.5 to 13 nm, for example, the thickness of the first functional layer 13 is 6.5 nm, 7 nm, 8 nm, 9 nm, 10 nm, 11 nm, 12 nm, or 13 nm. The first functional layer 13 utilizes the low emissivity of metallic silver (Ag) to reduce the emissivity of the glass coating 100, filtering sunlight into a cold light source and improving the transmittance of the glass coating 100. Preferably, the copper-nickel alloy layer is a copper-nickel alloy, 99 / 1-2.

[0030] The second protective layer 21 includes at least one of a NiCr layer or a Ni layer, and has a thickness of 3 to 5 nm. For example, the thickness of the second protective layer 21 can be 3 nm, 4 nm, or 5 nm. The second protective layer 21 abuts against the first functional layer 13 and also serves to protect the first functional layer 13.

[0031] In some embodiments, the thickness ratio of the first protective layer 12 to the second protective layer 21 is (1.1~1.5):1. For example, the thickness ratio of the first protective layer 12 to the second protective layer 21 is 1.1:1, 1.2:1, 1.3:1, 1.4:1, or 1.5:1, etc. In conjunction with the foregoing, by setting the thickness ratio of the first functional layer 13 to the first protective layer 12 to (1.8~2.2):1, the thickness ratio of the first protective layer 12 to the second protective layer 21 to (1.1~1.5):1, and the thickness ratio of the first dielectric layer 11, the second dielectric layer 22, and the third dielectric layer 32 to (1.8~2.2):(2~2.4):1, the light interference effect of the glass coating 100 can be effectively optimized, so that the transmitted color of the curved tempered glass coated with the glass coating 100 is consistent at both the flat and curved surfaces and is not too greenish, while also ensuring that the outdoor reflected color is highly consistent at all angles.

[0032] The second dielectric layer 22 includes an AZO layer and a SiN layer. x Layer, ZnAlO x At least one of the layers. The thickness of the second dielectric layer 22 is 70~90 nm, for example, the thickness of the second dielectric layer 22 can be 70 nm, 75 nm, 80 nm, 85 nm or 90 nm, etc. The second dielectric layer 22 is located in the middle layer of the glass coating 100, and serves to separate the two functional layers (the first functional layer 13 and the second functional layer 23). The second dielectric layer 22 can adjust the light interference effect to change the color of the incident and scattered light after the light passes through the glass coating 100. The AZO layer can be made of ZnO. x and AlO x The film is deposited on a fired ceramic target, resulting in a uniform and dense film with high structural stability. In some embodiments, the second dielectric layer 22 includes sequentially stacked AZO layers and SiN layers. x Layer, ZnAlO x Layer. ZnAlO x The surface smoothness of the layer is high, in ZnAlO x The deposition of the second functional layer 23 can improve the film quality of the second functional layer 23.

[0033] The second functional layer 23 includes at least one of an Ag layer or a copper-nickel alloy layer, with a thickness of 9-15 nm. For example, the thickness of the second functional layer 23 can be 9 nm, 10 nm, 11 nm, 12 nm, 13 nm, 14 nm, or 15 nm, etc. The second functional layer 23 utilizes the low emissivity of metallic silver (Ag) to reduce the emissivity of the glass coating 100, filtering sunlight into a cold light source and improving the transmittance of the glass coating 100. The first functional layer 13 and the second functional layer 23 are combined to form a "double silver" structure. Preferably, the copper-nickel alloy layer is a copper-nickel alloy, 99 / 1-2.

[0034] The third protective layer 31 includes at least one of a NiCr layer or a Ni layer, and has a thickness of 1.5 to 5 nm. For example, the thickness of the third protective layer 31 is 1.5 nm, 2 nm, 3 nm, 4 nm, or 5 nm. The third protective layer 31 abuts against the second functional layer 23 and serves to protect the second functional layer 23.

[0035] The third dielectric layer 32 includes an AZO layer and a SiN layer. x layer, ZrO x At least one of the layers, the thickness of the third dielectric layer 32 is 25-45 nm. For example, the thickness of the third dielectric layer 32 can be 25 nm, 30 nm, 35 nm, 40 nm, or 45 nm, etc. In some embodiments, the third dielectric layer 32 includes an AZO layer and a SiN layer stacked sequentially. x layer, ZrO x Layers. Using ZrO x The ZrO layer possesses advantages such as high temperature resistance, excellent thermal stability, and strong chemical stability. x The outermost layer is set to effectively protect the glass coating 100, ensuring the surface quality of the glass coating 100 even in the high temperature of the tempering furnace at 600~750℃.

[0036] The present invention also proposes a method for preparing a glass coating as described above, comprising: sequentially forming a first composite layer, a second composite layer and a third composite layer on a glass substrate using magnetron sputtering.

[0037] In some embodiments, the magnetron sputtering target includes silicon-aluminum targets, silver targets, and nickel-chromium targets. Specifically, the power of the silicon-aluminum target is 0~70 kW, for example, the power of the silicon-aluminum target is 0, 10 kW, 20 kW, 30 kW, 40 kW, 50 kW, 60 kW, or 70 kW, etc. The sputtering atmosphere includes argon and nitrogen, and the sputtering pressure is 2×10⁻⁶. -3 ~5×10 -3 mbar. For example, the sputtering pressure is 2 × 10⁻⁶ mbar. - 3 mbar, 3×10-3 mbar, 4×10 -3 mbar or 5×10 -3 mbar, etc.

[0038] The power of the silver target ranges from 0 to 20 kW; for example, the power of the silver target can be 0, 5 kW, 10 kW, 15 kW, or 20 kW. The sputtering atmosphere includes argon, and the sputtering pressure is 2 × 10⁻⁶. -3 ~5×10 -3 mbar. For example, the sputtering pressure can be 2 × 10⁻⁶ mbar. -3 mbar, 2.5×10 -3 mbar or 3×10 -3 mbar, etc.

[0039] The power of the nickel-chromium target ranges from 0 to 20 kW; for example, the power of the nickel-chromium target can be 0, 5 kW, 10 kW, 15 kW, or 20 kW. The sputtering atmosphere includes argon, and the sputtering pressure is 2 × 10⁻⁶. -3 ~5×10 -3 mbar. For example, the sputtering pressure can be 2 × 10⁻⁶ mbar. - 3 mbar, 2.5×10 -3 mbar or 3×10 -3 mbar, etc.

[0040] Using the above-mentioned target material and corresponding power, atmosphere and pressure for magnetron sputtering on a glass substrate can ensure sputtering stability, prevent damage to the target material, and guarantee the quality of the glass coating.

[0041] The present invention also proposes an application of the glass coating as described above, wherein the glass coating is used on tempered glass, preferably, the tempered glass is curved tempered glass. Understandably, the glass coating is formed on a glass substrate using the coating method described above.

[0042] The following specific examples provide further details.

[0043] Examples 1-3 A glass coating was deposited on a glass substrate using the aforementioned magnetron sputtering method, and then tempered to obtain a curved tempered coated glass (6 mm). The target materials used are shown in Table 1.

[0044] Table 1. Magnetron Sputtering Targets and Process Parameters

[0045] The structure and thickness of the glass coating on the prepared curved tempered coated glass are shown in Table 2.

[0046] Table 2 Structure and Thickness of Glass Coating

[0047] The glass color, small-angle color, and transmittance of the curved tempered coated glass prepared in Examples 1-3 were tested, and the results are shown in Table 3.

[0048] Table 3 Color Values ​​for Curved Tempered Coated Glass

[0049] As can be seen from Table 3, the transmitted color of the curved tempered coated glass prepared in Examples 1-3 is basically the same as that of the tempered glass with non-steel and copper structure. Among them, the curved tempered coated glass prepared in Example 3 is almost identical to the tempered glass with non-steel and copper structure in terms of surface color, small angle (60°) color, and transmitted color.

[0050] Furthermore, the light transmittance of the curved tempered coated glass prepared in Example 3 was tested at different outdoor angles and indoors, and the results are as follows: Figure 2 and Figure 3 As shown, from Figure 2 and Figure 3 It can be seen that the curved tempered coated glass prepared in Example 3 has basically the same outdoor and transmitted colors as the non-steel copper-structured tempered glass. The outdoor reflected colors (a* b*) change with the angle in a basically identical manner, and the outdoor visual contrast is also consistent.

[0051] In summary, the glass coating proposed in this invention can solve the problem of large color difference in transmission (greenish transmission color) in high-performance "double silver" structure curved tempered coated glass, and ensure high consistency of outdoor reflected color at all angles.

[0052] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A glass coating, characterized by, The first composite layer, the second composite layer and the third composite layer are sequentially stacked; The first composite layer comprises a first medium layer, a first protective layer and a first functional layer which are sequentially stacked, the first medium layer is used to provide adhesion for the glass coating layer; the first protective layer is used to protect the first functional layer, and the first functional layer is used to reduce the emissivity of the glass coating layer; The second composite layer comprises a second protective layer, a second medium layer and a second functional layer which are sequentially stacked, the second protective layer is used to protect the first functional layer, the second medium layer is used to regulate the interference effect of the glass coating layer, and the second functional layer is used to reduce the emissivity of the glass coating layer; The third composite layer comprises a third protective layer and a third medium layer which are sequentially stacked, the third protective layer is used to protect the second functional layer, and the third medium layer is used to provide wear resistance for the glass coating layer; The thickness ratio of the first medium layer, the second medium layer and the third medium layer is 1.8-2.2:2-2.4:

1.

2. The glass coating of claim 1, wherein, The thickness ratio of the first functional layer and the first protective layer is 1.8-2.2:

1.

3. The glass coating of claim 1, wherein, The thickness ratio of the first protective layer and the second protective layer is 1.1-1.5:

1.

4. The glass coating of claim 1, wherein, The first dielectric layer comprises SiO x The second dielectric layer comprises at least one of a SiN x layer, a ZnAlO x layer. The second dielectric layer includes at least one of an AZO layer, a SiN x layer, a ZnAlO x layer. The third dielectric layer includes at least one of an AZO layer, a SiN x layer, a ZrO x layer.

5. The glass coating of claim 4, wherein, The first dielectric layer comprises SiO x layers, SiN x layers, ZnAlO x layers, the thickness ratio of SiO x layer and SiN x layer in the first dielectric layer is 1-1.2:4-5.

6. The glass coating of claim 1, wherein, The first protective layer comprises at least one of a NiCr layer or a Ni layer; The first functional layer comprises at least one of an Ag layer or a copper-nickel alloy layer; The second protective layer comprises at least one of a NiCr layer or a Ni layer; The second functional layer comprises at least one of an Ag layer or a copper-nickel alloy layer; The third protective layer comprises at least one of a NiCr layer or a Ni layer.

7. The glass coating of claim 1, wherein, The thickness of the first medium layer is 50-75 nm; The thickness of the first protective layer is 3-6 nm; The thickness of the first functional layer is 6.5-13 nm; The thickness of the second protective layer is 3-5 nm; The thickness of the second medium layer is 70-90 nm; The thickness of the second functional layer is 9-15 nm; The thickness of the third protective layer is 1.5-5 nm; The thickness of the third medium layer is 25-45 nm.

8. The method of producing a glass-coated layer according to any one of claims 1 to 7, characterized by, comprises: The first composite layer, the second composite layer and the third composite layer are sequentially formed on the glass substrate by using magnetron sputtering.

9. The method of claim 8, wherein the glass coating is prepared by a method comprising: The target material of the magnetron sputtering comprises a silicon-aluminum target, a silver target and a nickel-chromium target; The power of the silicon aluminum target is 0-70 kW, the sputtering atmosphere includes argon and nitrogen, and the sputtering pressure is 2x10 -3 ~5x10 -3 mbar; The power of the silver target is 0-20 kW, the sputtering atmosphere includes argon, and the sputtering gas pressure is 2x10 -3 ~5x10 -3 mbar; The power of the NiCr target was 0-20 kW, the sputtering atmosphere included argon, and the sputtering gas pressure was 2 x 10 -3 ~5 x 10 -3 mbar.

10. Use of the glass coating according to any one of claims 1 to 8, characterized in that The glass coating layer is used for tempered glass; Preferably, the tempered glass is a bent tempered glass.

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