Neutral gray heat reflection coated glass

Abstract

The utility model discloses neutral gray heat reflection coated glass in the technical field of vacuum magnetron sputtering coating, which comprises a glass substrate and a coating layer, the coating layer is sequentially compounded with a first film layer, a second film layer and a third film layer from the glass substrate to the outside, the first film layer is a silicon nitride layer, the coating thickness of the first film layer is 20nm-35nm, and the coating thickness of the second film layer is 20nm-35nm. The second film layer is a nickel-chromium layer, the coating thickness of the second film layer is 4-5nm, the third film layer is a silicon nitride layer, and the coating thickness of the third film layer is 20-25nm. The coated glass has the characteristics that the reflectivity is lower, the visible light transmittance is about 50%, the glass surface reflection color, the film surface reflection color and the transmission color are neutral gray, and the like, and can realize lower visible light reflectivity; and the paint has no light pollution, does not bring dizziness and visual fatigue to people, shows a neutral grey effect after being applied to the wall, and is more and more popular in the market.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum magnetron sputtering coating, in particular to a neutral grey heat-reflective coated glass. Background Art

[0002] As an excellent building material, glass is widely used in buildings due to its good permeability and the functions of light transmission and wind and snow protection. With the development of modern science and technology, glass has been given various new connotations. Among them, heat-reflective coated glass, also known as sunlight control film glass, is made by coating one or more layers of metal or compound films on the surface of high-quality float glass using vacuum magnetron sputtering. The main function of the film is to control the reflection, transmission and absorption of direct solar radiation according to the required proportion, and produce the required reflected color. It has the function of limiting the incident amount of solar radiation, with obvious shading effect, good sight shielding function for indoor objects and building components, relatively ideal visible light transmittance and reflectance, and weakening the transmission of ultraviolet light.

[0003] At present, most heat-reflective coated glass on the market is mainly blue-green in color tone and has high reflectivity. When installed on the curtain walls of high-rise buildings, it will bring certain light pollution, causing dizziness and visual fatigue. Some products on the market have neutral gray color data even if the outdoor reflection color is neutral gray. Because the transmitted color is green, the visual effect after the glass is installed on the wall is still green, and the neutral gray effect cannot be seen.

[0004] Based on this, the utility model designs a neutral grey heat-reflective coated glass to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a neutral gray heat-reflective coated glass to solve the problem in the above-mentioned background technology that most heat-reflective coated glasses currently on the market are mainly blue-green deep colors with high reflectivity. When installed on the curtain walls of high-rise buildings, they will cause certain light pollution, dizziness and visual fatigue. Some products on the market will still appear greenish in visual effect after being installed on the wall because the transmitted color is greenish, even if the outdoor reflected color shows neutral gray color data, and the neutral gray effect cannot be seen.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a neutral gray heat-reflective coated glass, comprising a glass substrate and a coating layer, wherein the coating layer is compounded with a first film layer, a second film layer and a third film layer in sequence from the glass substrate outward, the first film layer being configured as a silicon nitride layer, the coating thickness of the first film layer being 20nm to 35nm, the second film layer being configured as a nickel-chromium layer, the coating thickness of the second film layer being 4nm to 5nm, the third film layer being configured as a silicon nitride layer, the coating thickness of the third film layer being 20nm to 25nm.

[0007] Preferably, the sum of the thicknesses of the first film layer, the second film layer and the third film layer is not less than 45 nm and not more than 55 nm.

[0008] A method for preparing the neutral grey heat-reflective coated glass comprises the following steps: performing vacuum magnetron sputtering on the surface of a glass substrate using a target material under a vacuum environment, and sequentially sputtering to form a first film layer, a second film layer, and a third film layer;

[0009] 1) Magnetron sputtering coating layer;

[0010] A. Magnetron sputtering first film layer:

[0011] Target quantity: 6 AC rotating targets; target configuration: silicon aluminum (SiAl); process gas ratio: argon and nitrogen, with the ratio of argon to nitrogen being 1:1.2; sputtering pressure: 4 to 6 x 10-3 mbar;

[0012] B. Magnetron sputtering second film layer:

[0013] Target quantity: 2 DC planar targets; target material configuration is nickel-chromium (NiCr); process gas ratio: pure argon; sputtering gas pressure is 2 to 4X10-3 mbar;

[0014] C. Magnetron sputtering third film layer:

[0015] Target quantity: 6 AC rotating targets; target configuration: silicon aluminum (SiAl); process gas ratio: argon and nitrogen, with the ratio of argon to nitrogen being 1:1.2; sputtering pressure: 4 to 6 x 10-3 mbar;

[0016] Preferably, the transmission speed of the sputtering chamber is controlled at 9m / min.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: in the coated glass, the first film layer is set as a silicon nitride layer, the second film layer is set as a nickel-chromium layer, and the third film layer is set as a silicon nitride layer. Two silicon nitride (SiNx) layers are set on both sides of the second film layer nickel-chromium (NiCr) layer. The nickel-chromium (NiCr) layer has the function of increasing the absorption of sunlight and improving the light trapping effect, which can greatly improve the visible light absorption rate of the coated glass, so that the coated glass has a low visible light reflectivity under the condition of low transmittance. The first film layer (SiNx) is used as the bottom layer. SiNx has a similar structure to glass and can increase the bonding force between the film and the glass. The third film layer 3SiNx is used as the top layer. SiNx has a high hardness and can It plays a very good role in top-layer protection; the product of this invention uses 6mm single-piece parameters: visible light transmittance color T∈[49,51], a*∈[-1,-2], b*∈[-1,-2]; visible light glass surface reflection color Lg∈[32,33], a*∈[0,-1], b*∈[-4,-5]; visible light film surface reflection color Lf∈[48,49], a*∈[0,1], b*∈[0,1]. This coated glass has a low reflectivity and a visible light transmittance of about 50%. The glass surface reflection color, film surface reflection color, and transmission color are all neutral gray, which can achieve a low visible light reflectivity, no light pollution, will not cause dizziness and visual fatigue, and will show a neutral gray effect after being put on the wall. It is becoming more and more popular in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the layered structure of the coated glass.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] 1-first film layer, 2-second film layer, 3-third film layer. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 The utility model provides a technical solution: a neutral gray heat-reflective coated glass, comprising a glass substrate and a coating layer, wherein the coating layer is compounded with a first film layer 1, a second film layer 2 and a third film layer 3 in sequence from the glass substrate outward, the first film layer 1 is configured as a silicon nitride layer, and the coating thickness of the first film layer 1 is 20nm to 35nm, the second film layer 2 is configured as a nickel-chromium layer, and the coating thickness of the second film layer 2 is 4nm to 5nm, the third film layer 3 is configured as a silicon nitride layer, and the coating thickness of the third film layer 3 is 20nm to 25nm.

[0024] The sum of the thicknesses of the first film layer, the second film layer and the third film layer is not less than 45 nm and not greater than 55 nm.

[0025] In the coated glass, the first film layer 1 is set as a silicon nitride layer, the second film layer 2 is set as a nickel-chromium layer, and the third film layer 3 is set as a silicon nitride layer. Two silicon nitride (SiNx) layers are set on both sides of the second film layer 2 nickel-chromium (NiCr) layer. The nickel-chromium (NiCr) layer has the function of increasing sunlight absorption and improving light trapping effect, which can greatly improve the visible light absorption rate of the coated glass, so that the coated glass has a low visible light reflectivity under the condition of low transmittance. The first film layer 1 (SiNx) film layer is used as the bottom layer. SiNx has a similar structure to glass and can increase the bonding strength between the film and the glass. The third film layer 3 SiNx film layer is used as the top layer. SiNx has a high hardness and can play a good role in protecting the top layer. Protective effect; the product of this invention uses 6mm single-piece parameters: visible light transmittance T∈[49,51], a*∈[-1,-2], b*∈[-1,-2]; visible light glass surface reflection color Lg∈[32,33], a*∈[0,-1], b*∈[-4,-5]; visible light film surface reflection color Lf∈[48,49], a*∈[0,1], b*∈[0,1]. This coated glass has a low reflectivity and a visible light transmittance of about 50%. The glass surface reflection color, film surface reflection color, and transmission color are all neutral gray, which can achieve a low visible light reflectivity, no light pollution, will not cause dizziness and visual fatigue, and will show a neutral gray effect after being put on the wall. It is becoming more and more popular in the market.

[0026] A method for preparing neutral grey heat-reflective coated glass, the method comprising the following steps: performing vacuum magnetron sputtering on a surface of a glass substrate using a target material in a vacuum environment, and sequentially sputtering to form a first film layer, a second film layer, and a third film layer;

[0027] 1) Magnetron sputtering coating layer;

[0028] A. Magnetron sputtering first film layer:

[0029] Target quantity: 6 AC rotating targets; target configuration: silicon aluminum (SiAl); process gas ratio: argon and nitrogen, with the ratio of argon to nitrogen being 1:1.2; sputtering pressure: 4 to 6 x 10-3 mbar;

[0030] B. Magnetron sputtering second film layer:

[0031] Target quantity: 2 DC planar targets; target material configuration is nickel-chromium (NiCr); process gas ratio: pure argon; sputtering gas pressure is 2 to 4X10-3 mbar;

[0032] C. Magnetron sputtering third film layer:

[0033] Target quantity: 6 AC rotating targets; target configuration: silicon aluminum (SiAl); process gas ratio: argon and nitrogen, with the ratio of argon to nitrogen being 1:1.2; sputtering pressure: 4 to 6 x 10-3 mbar;

[0034] 2) The transmission speed of the sputtering chamber is controlled at 9m / min;

[0035] 3) The glass substrate is float glass with a thickness of 3 to 12 mm.

[0036] Examples 1-4

[0037] A neutral grey heat-reflective coated glass and a preparation method thereof, comprising the following steps:

[0038] A: Select a glass substrate and cut it into the predetermined size using a cutting machine. Place the substrate with the air side facing up, clean it in a cleaning machine, and use an air knife to blow dry the moisture.

[0039] B: Place the cleaned substrate into the vacuum magnetron sputtering chamber and sputter each coating layer in sequence. The specific parameters are shown in Table 1.

[0040] Table 1

[0041]

[0042] The optical properties of the glasses obtained in Examples 1-4 above were measured, and the test results are shown in Table 2:

[0043] Table 2

[0044]

[0045]

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0047] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A neutral grey heat-reflective coated glass comprising a glass substrate and a coating layer, characterized in that: The coating layer is compounded with a first film layer (1), a second film layer (2) and a third film layer (3) in sequence from the glass substrate outward, the first film layer (1) is set as a silicon nitride layer, the coating thickness of the first film layer (1) is 20nm to 35nm, the second film layer (2) is set as a nickel-chromium layer, the coating thickness of the second film layer (2) is 4nm to 5nm, the third film layer (3) is set as a silicon nitride layer, and the coating thickness of the third film layer (3) is 20nm to 25nm.

2. The neutral gray heat-reflective coated glass according to claim 1, characterized in that: The sum of the thicknesses of the first film layer, the second film layer and the third film layer is not less than 45 nm and not more than 55 nm.

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