Low-reflection sun-shading double-silver coated glass as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of coated glass, and particularly relates to low-reflection sunshade double-silver coated glass as well as a preparation method and application thereof. According to the low-reflection sun-shading double-silver coated glass provided by the invention, on the basis of the existing double-silver coated glass, 50-60% of visible light transmittance and less than 6% of reflectivity are realized by introducing a new absorption layer and a new dielectric material, and the reflectivity is less than 8% after the low-reflection sun-shading double-silver coated glass is made into hollow glass, so that the light pollution of a curtain wall can be effectively reduced; meanwhile, excellent heat preservation and sunshade effects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of coated glass, and in particular relates to a low-reflection sunshade double-silver coated glass and a preparation method and application thereof. Background Art

[0002] Low-E glass, also known as low-radiation glass, is a film product composed of multiple layers of metal or other compounds coated on the glass surface. Its coating layer has the characteristics of high transmittance of visible light and high reflection of mid- and far-infrared rays, making it have excellent heat insulation effect and good light transmittance compared with ordinary glass and traditional architectural coated glass.

[0003] Among the many categories of Low-E glass, double-silver Low-E glass highlights the shielding effect of glass on solar radiation, and can cleverly combine the high light transmittance of glass with the low transmittance of solar radiation. Compared with single-silver Low-E glass, it has lower solar transmittance under the same visible light transmittance. As a high-tech energy-saving product, the market development of double-silver Low-E glass has entered a mature stage. Due to its energy-saving, environmental protection and beautiful features, double-silver Low-E glass will become the mainstream trend of the commercial building glass market and has a very broad development prospect.

[0004] At present, the reflectivity of double-silver Low-E glass products on the market is about 10%. However, with the increasing concern about building light pollution, the market has lower and lower requirements for the reflectivity of indoor and outdoor glass, and even requires the reflectivity to be below 7%. Existing products are difficult to meet the needs of practical applications, so it is very necessary to develop low-reflection Low-E glass. Summary of the invention

[0005] In view of the problem that the reflectivity of double-silver Low-E glass products in the prior art is relatively high and it is difficult to meet the needs of actual applications, the present invention provides a low-reflection sunshade double-silver coated glass. Based on the existing double-silver film glass, a new absorption layer and a new dielectric material are introduced to achieve a visible light transmittance of 50% to 60% and a reflectivity of less than 6%. After being made into hollow glass, the reflectivity is less than 8%, which can effectively reduce the light pollution of the curtain wall and also has excellent thermal insulation and sunshade effects.

[0006] The first aspect of the present invention provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate, wherein the composite film layer comprises an absorption layer, a first dielectric layer, a first Ag layer, a first Ag protective layer, a second dielectric layer, a second Ag layer, a second Ag protective layer, and a third dielectric layer from the inside to the outside of one side of the glass substrate; The absorption layer includes an absorption base layer ZrVO layer and an absorption strengthening layer SeO2 layer arranged in sequence; The second dielectric layer is a TiNbO layer.

[0007] Furthermore, the first dielectric layer and the third dielectric layer are any one of a SiN layer, a SiAlN layer, a SiAlZrN layer, a SnO2 layer, and a ZnSnO layer.

[0008] Furthermore, the first Ag protective layer and the second Ag protective layer are any one of a NiCr layer, a ZnO layer, a NiCrN layer, and a NiCrO layer.

[0009] Furthermore, the thickness of the absorption base layer is 5nm-15nm; the thickness of the absorption enhancement layer is 2nm-5nm.

[0010] Furthermore, the thickness of the first dielectric layer and the third dielectric layer is 10-30 nm.

[0011] Furthermore, the thickness of the second dielectric layer is 20-50 nm.

[0012] Furthermore, the thickness of the first Ag layer and the second Ag layer are both 5-20 nm.

[0013] Furthermore, the thickness of the first Ag protective layer and the second Ag protective layer is 0.5-2 nm.

[0014] A second aspect of the present invention provides a method for preparing the above-mentioned low-reflection sunshade double-silver coated glass, comprising the following steps: (1) Clean and dry the glass substrate; (2) Placing a glass substrate in a vacuum magnetron sputtering chamber, and sequentially preparing an absorption layer, a first dielectric layer, a first Ag layer, a first Ag protective layer, a second dielectric layer, a second Ag layer, a second Ag protective layer, and a third dielectric layer on the glass substrate by magnetron sputtering.

[0015] The third aspect of the present invention provides a hollow glass, at least one side of which is made of the above-mentioned low-reflection sunshade double-silver coated glass.

[0016] The beneficial effects achieved by one or more technical solutions of the present invention are as follows: 1. The present invention introduces V into the ZrO material as the absorption base layer, which can effectively enhance the absorption of light and reduce the reflection of light. SeO2 is used as the absorption strengthening layer, which can further expand the absorption effect, thereby achieving a lower reflectivity. At the same time, the composite absorption layer structure composed of the absorption base layer and the absorption strengthening layer can also block the glass substrate and the Ag layer to avoid affecting the performance of the Ag layer.

[0017] 2. The present invention uses TiNbO material as the second dielectric layer. The presence of Ti-Nb alloy can effectively increase the refractive index of the material, better improve the interference propagation of light, and further reduce the light reflectivity.

[0018] 3. The low-reflection sunshade double-silver coated glass provided by the present invention can achieve a visible light transmittance of 50% to 60% and a reflectivity of less than 6%. After being made into hollow glass, the reflectivity is less than 8%, which can effectively reduce the light pollution of the curtain wall. At the same time, it also has excellent thermal insulation and sunshade effects and can be widely used in the construction industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the low-reflection sunshade double-silver coated glass provided by the present invention.

[0020] Description of the drawings: 1-glass substrate, 2-absorption base layer, 3-absorption strengthening layer, 4-first dielectric layer, 5-first Ag layer, 6-first Ag protective layer, 7-second dielectric layer, 8-second Ag layer, 9-second Ag protective layer, 10-third dielectric layer. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in combination with specific embodiments and comparative examples.

[0022] The process and parameters of each film layer when magnetron sputtering is used for film coating in the embodiment of the present invention are shown in Table 1.

[0023] Table 1

[0024] Example 1 The present embodiment provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 10nm thick ZrVO layer, a 2nm thick SeO2 layer, a 15nm thick SiN layer, a 10nm thick Ag layer, a 1nm thick NiCr layer, a 30nm thick TiNbO layer, a 15nm thick Ag layer, a 1nm thick NiCr layer, and a 15nm thick SiN layer.

[0025] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) The glass substrate was placed in a vacuum magnetron sputtering chamber, and a vacuum magnetron sputtering coating machine was used to sequentially prepare on the glass substrate by magnetron sputtering: a 10 nm thick ZrVO layer, a 2 nm thick SeO2 layer, a 15 nm thick SiN layer, a 10 nm thick Ag layer, a 1 nm thick NiCr layer, a 30 nm thick TiNbO layer, a 15 nm thick Ag layer, a 1 nm thick NiCr layer, and a 5 nm thick SiN layer. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0026] Example 2 The present embodiment provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 5nm thick ZrVO layer, a 2nm thick SeO2 layer, a 20nm thick SiAlN layer, a 15nm thick Ag layer, a 0.5nm thick ZnO layer, a 20nm thick TiNbO layer, a 10nm thick Ag layer, a 1nm thick ZnO layer, and a 15nm thick SiAlN layer.

[0027] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) A glass substrate was placed in a vacuum magnetron sputtering chamber, and a 5 nm thick ZrVO layer, a 2 nm thick SeO2 layer, a 20 nm thick SiAlN layer, a 15 nm thick Ag layer, a 0.5 nm thick ZnO layer, a 20 nm thick TiNbO layer, a 10 nm thick Ag layer, a 1 nm thick ZnO layer, and a 15 nm thick SiAlN layer were sequentially prepared on the glass substrate by magnetron sputtering using a vacuum offline magnetron sputtering coating device. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0028] Example 3 The present embodiment provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 10nm thick ZrVO layer, a 4nm thick SeO2 layer, a 30nm thick SiAlZrN layer, a 5nm thick Ag layer, a 0.5nm thick NiCrN layer, a 25nm thick TiNbO layer, a 10nm thick Ag layer, a 1.0nm thick NiCrN layer, and a 20nm thick SiAlZrN layer.

[0029] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) A glass substrate was placed in a vacuum magnetron sputtering chamber, and a 10 nm thick ZrVO layer, a 4 nm thick SeO2 layer, a 30 nm thick SiAlZrN layer, a 5 nm thick Ag layer, a 0.5 nm thick NiCrN layer, a 25 nm thick TiNbO layer, a 10 nm thick Ag layer, a 1.0 nm thick NiCrN layer, and a 20 nm thick SiAlZrN layer were sequentially prepared on the glass substrate by magnetron sputtering using a vacuum offline magnetron sputtering coating device. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0030] Example 4 The present embodiment provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 15nm thick ZrVO layer, a 5nm thick SeO2 layer, a 20nm thick SnO2 layer, a 20nm thick Ag layer, a 2.0nm thick NiCrO layer, a 20nm thick TiNbO layer, a 5nm thick Ag layer, a 1nm thick NiCrO layer, and a 20nm thick SnO2 layer.

[0031] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) A glass substrate was placed in a vacuum magnetron sputtering chamber, and a 15 nm thick ZrVO layer, a 5 nm thick SeO2 layer, a 20 nm thick SnO2 layer, a 20 nm thick Ag layer, a 2.0 nm thick NiCrO layer, a 20 nm thick TiNbO layer, a 5 nm thick Ag layer, a 1 nm thick NiCrO layer, and a 20 nm thick SnO2 layer were sequentially prepared on the glass substrate by magnetron sputtering using a vacuum offline magnetron sputtering coating device. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0032] Comparative Example 1 The present comparative example provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 10nm thick ZrO layer, a 2nm thick SeO2 layer, a 15nm thick SiN layer, a 10nm thick Ag layer, a 1nm thick NiCr layer, a 30nm thick TiNbO layer, a 15nm thick Ag layer, a 1nm thick NiCr layer, and a 15nm thick SiN layer.

[0033] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) A glass substrate was placed in a vacuum magnetron sputtering chamber, and a 10 nm thick ZrO layer, a 2 nm thick SeO2 layer, a 15 nm thick SiN layer, a 10 nm thick Ag layer, a 1 nm thick NiCr layer, a 30 nm thick TiNbO layer, a 15 nm thick Ag layer, a 1 nm thick NiCr layer, and a 15 nm thick SiN layer were sequentially prepared on the glass substrate by magnetron sputtering using a vacuum offline magnetron sputtering coating device. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0034] Comparative Example 2 The present comparative example provides a low-reflection sunshade double silver coated glass, comprising a glass substrate and a composite film layer coated on one surface of the glass substrate. The composite film layer comprises, from the inside to the outside of one side of the glass substrate: a 10nm thick ZrVO layer, a 15nm thick SiN layer, a 10nm thick Ag layer, a 1nm thick NiCr layer, a 30nm thick TiNbO layer, a 15nm thick Ag layer, a 1nm thick NiCr layer, and a 15nm thick SiN layer.

[0035] The preparation method is as follows: (1) Clean and dry the glass substrate; (2) A glass substrate was placed in a vacuum magnetron sputtering chamber, and a 10 nm thick ZrVO layer, a 15 nm thick SiN layer, a 10 nm thick Ag layer, a 1 nm thick NiCr layer, a 30 nm thick TiNbO layer, a 15 nm thick Ag layer, a 1 nm thick NiCr layer, and a 15 nm thick SiN layer were sequentially prepared on the glass substrate by magnetron sputtering using a vacuum offline magnetron sputtering coating device. The specific magnetron sputtering process and parameters of each layer are shown in Table 1.

[0036] Performance Test: The low-reflection sunshade double-silver coated glass in each embodiment and comparative example was tempered at 680° C. for 480 seconds in a double-chamber furnace after coating. The measured appearance color properties are shown in Table 2.

[0037] Table 2

[0038] The performance of the insulating glass made of the low-reflection sunshade double-silver coated glass in the above embodiments and comparative examples is shown in Table 3, wherein the insulating glass structure is: 6mm low-reflection sunshade double-silver coated glass / 12mm85% argon spacer / 6mm white glass.

[0039] Table 3

[0040] Based on the test results in Table 2 and Table 3, the low-reflection sunshade double-silver coated glass provided by the present invention can achieve a visible light transmittance of 50% to 60% and a reflectivity of less than 6%. After being made into insulating glass, the reflectivity is less than 8%, which can effectively reduce light pollution of curtain walls. At the same time, it also has excellent thermal insulation and sunshade effects, and can be widely used in the construction industry.

Claims

1. A low-reflection sunshade double-silver coated glass, comprising a glass substrate and a composite film layer coated on one side of the glass substrate, characterized in that: The composite film layer includes an absorption layer, a first dielectric layer, a first Ag layer, a first Ag protective layer, a second dielectric layer, a second Ag layer, a second Ag protective layer, and a third dielectric layer from the inside to the outside of one side of the glass substrate; The absorption layer includes an absorption base layer ZrVO layer and an absorption strengthening layer SeO2 layer arranged in sequence; The second dielectric layer is a TiNbO layer.

2. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The first dielectric layer and the third dielectric layer are any one of a SiN layer, a SiAlN layer, a SiAlZrN layer, a SnO2 layer, and a ZnSnO layer.

3. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The first Ag protective layer and the second Ag protective layer are any one of a NiCr layer, a ZnO layer, a NiCrN layer, and a NiCrO layer.

4. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The thickness of the absorption base layer is 5-15 nm; the thickness of the absorption enhancement layer is 2-5 nm.

5. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The thickness of the first dielectric layer and the third dielectric layer is 10-30 nm.

6. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The thickness of the second dielectric layer is 20-50 nm.

7. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The thickness of the first Ag layer and the second Ag layer are both 5-20 nm.

8. The low-reflection sunshade double-silver coated glass according to claim 1, characterized in that: The thickness of the first Ag protective layer and the second Ag protective layer is 0.5nm~2nm.

9. The method for preparing the low-reflection sunshade double-silver coated glass according to any one of claims 1 to 8, characterized in that: The steps include: (1) Clean and dry the glass substrate; (2) Placing a glass substrate in a vacuum magnetron sputtering chamber, and sequentially preparing an absorption layer, a first dielectric layer, a first Ag layer, a first Ag protective layer, a second dielectric layer, a second Ag layer, a second Ag protective layer, and a third dielectric layer on the glass substrate by magnetron sputtering.

10. A hollow glass, characterized in that: At least one side of the insulating glass is the low-reflection sunshade double-silver coated glass as described in any one of claims 1 to 8.

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