Gray four-silver low-emissivity glass

Abstract

The invention relates to the technical field of magnetron sputtering coating, and provides gray four-silver low-emissivity glass which is characterized in that a plurality of layers of coating structures are sequentially arranged on a glass substrate. The film coating structure comprises a first dielectric medium combination layer which covers a glass substrate and provides a base layer for the whole film coating structure; sequentially arranging a first functional layer, a first protective layer and a first spacing layer dielectric combination layer; the second functional layer is arranged behind the first absorbing layer and is combined with the first absorbing layer and the second protecting layer; sequentially arranging a second spacing layer dielectric combination layer, a third functional layer, a third protective layer and a third spacing layer dielectric combination layer; and finally, covering the top end of the structure with the fourth functional layer, the fourth protective layer and the second dielectric combination layer to complete the overall functional layout. The film coating structure is prepared through the magnetron sputtering technology, and accurate superposition and performance matching of all layers are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetron sputtering coating, and more specifically, the present invention relates to a gray four-silver low-emissivity glass. Background Art

[0002] With the improvement of people's living standards and the continuous increase of building energy-saving requirements, low-emissivity glass has been widely used in modern buildings due to its excellent heat insulation performance and good daylighting effect. Low-emissivity glass realizes the selective regulation of solar radiation by coating a functional coating on the glass surface, which not only ensures a high transmittance of visible light but also effectively blocks infrared radiation, thereby achieving the purpose of energy conservation and consumption reduction.

[0003] Currently, the mainstream low-emissivity glasses on the market mainly include double-silver low-emissivity glass and triple-silver low-emissivity glass. Double-silver low-emissivity glass has good cost performance, but the balance between its heat insulation performance and visible light transmittance needs to be improved. Triple-silver low-emissivity glass improves the heat insulation performance while ensuring the visible light transmittance by adding a silver film, but there is still room for further optimization.

[0004] In recent years, four-silver low-emissivity glass has gradually attracted attention due to its more excellent comprehensive performance. Compared with double-silver and triple-silver low-emissivity glasses, four-silver low-emissivity glass has the following advantages: lower emissivity, better heat insulation effect, higher visible light transmittance, and good sound insulation performance. However, most of the four-silver low-emissivity glasses on the market are slightly colored at present, and there is a lack of gray four-silver low-emissivity glass products with an ideal neutral color tone.

[0005] Therefore, developing a four-silver low-emissivity glass with good optical properties and a neutral gray appearance is of great significance for meeting the requirements of building energy conservation and aesthetics. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a gray four-silver low-emissivity glass. The present invention adopts a multi-layer film system structure including four silver layers sequentially arranged on a glass substrate, separates the silver layers by three spacer layers, and sets a copper absorption layer behind the second silver layer. This unique film layer design not only solves the technical problem of easy color deviation of the existing four-silver low-emissivity glass but also realizes excellent heat insulation performance and good visible light transmission performance.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The first dielectric composite layer, the first functional layer, the first protective layer, the first spacer dielectric composite layer, the second functional layer, the absorption layer, the second protective layer, the second spacer dielectric composite layer, the third functional layer, the third protective layer, the third spacer dielectric composite layer, the fourth functional layer, the fourth protective layer, and the second dielectric composite layer; wherein, the absorption layer is composed of metallic copper; the first functional layer, the second functional layer, the third functional layer, and the fourth functional layer are all silver layers; the first protective layer, the second protective layer, the third protective layer, and the fourth protective layer are all composed of metallic nickel-chromium alloy; the first dielectric composite layer and the second dielectric composite layer are both composed of silicon nitride, zinc oxide, and aluminum oxide; the first spacer dielectric composite layer, the second spacer dielectric composite layer, and the third spacer dielectric composite layer are composed of zinc oxide and aluminum oxide.

[0009] As a further aspect of the present invention, the film thickness of the first dielectric composite layer is 25 - 30 nm and it is composed of silicon nitride, zinc oxide, and aluminum oxide.

[0010] As a further aspect of the present invention, the film thickness of the first functional layer is 10 - 11 nm; the film thickness of the second functional layer is 10 - 11 nm; the film thickness of the third functional layer is 16 - 18 nm; the film thickness of the fourth functional layer is 14 - 16 nm.

[0011] As a further aspect of the present invention, the film thickness of the first protective layer, the second protective layer, the third protective layer, and the fourth protective layer is all 0.5 - 1 nm and they are all composed of metallic nickel-chromium alloy.

[0012] As a further aspect of the present invention, the film thickness of the first spacer dielectric composite layer is 70.0 - 78.0 nm, the film thickness of the second spacer dielectric composite layer is 70 - 78.0 nm, the film thickness of the third spacer dielectric composite layer is 70 - 78.0 nm, and the first spacer dielectric composite layer, the second spacer dielectric composite layer, and the third spacer dielectric composite layer are all composed of zinc oxide and aluminum oxide.

[0013] As a further aspect of the present invention, the film thickness of the first absorption layer is 3 - 5 nm and it is composed of metallic copper.

[0014] As a further aspect of the present invention, the thickness of the second dielectric composite layer is 30 - 40.0 nm and it is composed of silicon nitride, zinc oxide, and aluminum oxide.

[0015] As a further aspect of the present invention, each functional layer is sequentially deposited on a glass substrate by using magnetron sputtering technology, including:

[0016] The first dielectric composite layer is deposited on the glass substrate by magnetron sputtering, and the first dielectric composite layer is composed of silicon nitride, zinc oxide and aluminum oxide;

[0017] The first functional layer silver layer is deposited on the first dielectric composite layer by magnetron sputtering;

[0018] The first protective layer composed of nickel-chromium alloy is deposited on the first functional layer silver layer by magnetron sputtering;

[0019] The first spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide is deposited on the first protective layer by magnetron sputtering;

[0020] The second functional layer silver layer is deposited on the first spacer layer dielectric composite layer by magnetron sputtering;

[0021] The first absorption layer composed of metallic copper is deposited on the second functional layer silver layer by magnetron sputtering;

[0022] The second protective layer composed of nickel-chromium alloy is deposited on the first absorption layer by magnetron sputtering;

[0023] The second spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide is deposited on the second protective layer by magnetron sputtering;

[0024] The third functional layer silver layer is deposited on the second spacer layer dielectric composite layer by magnetron sputtering;

[0025] The third protective layer composed of nickel-chromium alloy is deposited on the third functional layer silver layer by magnetron sputtering;

[0026] The third spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide is deposited on the third protective layer by magnetron sputtering;

[0027] The fourth functional layer silver layer is deposited on the third spacer layer dielectric composite layer by magnetron sputtering;

[0028] The fourth protective layer composed of nickel-chromium alloy is deposited on the fourth functional layer silver layer by magnetron sputtering;

[0029] The second dielectric composite layer composed of silicon nitride, zinc oxide and aluminum oxide is deposited on the fourth protective layer by magnetron sputtering.

[0030] Compared with the prior art, the beneficial effects of a gray four-silver low-emissivity glass of the present invention are as follows:

[0031] The present invention sets a four-layer silver layer structure on a glass substrate. Compared with traditional double-silver and triple-silver low-emissivity glasses, it significantly improves the heat insulation performance, and while maintaining a good energy-saving effect, it provides a higher visible light transmittance, thus fully meeting the dual requirements of modern buildings for energy conservation and lighting. In addition, to ensure the independence and stability of the four silver layers, the present invention uses three dielectric spacer layers to effectively separate the silver layers, avoiding mutual interference between the silver layers, ensuring that the performance of each functional layer is fully exerted, and enabling the product to have a stable and reliable optical performance in practical applications.

[0032] The present invention successfully improves the transmitted color of the glass by adding a copper absorption layer after the second silver layer, making the product present an ideal gray appearance and filling the gap of gray four-silver low-emissivity glass in the market. Brief Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of a gray four-silver low-emissivity glass of the present invention. Detailed Embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] A gray four-silver low-emissivity glass includes a glass substrate, and the following are sequentially arranged on the glass substrate: a first dielectric composite layer composed of silicon nitride, zinc oxide, and aluminum oxide, a first functional layer silver layer composed of metallic silver, a first protective layer composed of metallic nickel-chromium alloy, a first spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide, a second functional layer silver layer composed of metallic silver, an absorption layer composed of metallic copper, a second protective layer composed of metallic nickel-chromium alloy, a second spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide, a third functional layer silver layer composed of metallic silver, a third protective layer composed of metallic nickel-chromium alloy, a third spacer layer dielectric composite layer composed of zinc oxide and aluminum oxide, a fourth functional layer silver layer composed of metallic silver, a fourth protective layer composed of metallic nickel-chromium alloy, and a second dielectric composite layer composed of silicon nitride, zinc oxide, and aluminum oxide; wherein, the first functional layer, the second functional layer, the third functional layer, and the fourth functional layer are all silver layers.

[0037] The film thickness of the first dielectric composite layer in the embodiment of the present invention is 25 - 30 nm and is composed of silicon nitride, zinc oxide, and aluminum oxide.

[0038] In the embodiment of the present invention, the film thickness of the first functional layer is 10 - 11 nm; the film thickness of the second functional layer is 10 - 11 nm; the film thickness of the third functional layer is 16 - 18 nm; the film thickness of the fourth functional layer is 14 - 16 nm.

[0039] In the embodiment of the present invention, the film thicknesses of the first protective layer, the second protective layer, the third protective layer and the fourth protective layer are all 0.5 - 1 nm, and they are all composed of nickel-chromium alloy.

[0040] In the embodiment of the present invention, the film thickness of the first spacer dielectric composite layer is 70.0 - 78.0 nm, the film thickness of the second spacer dielectric composite layer is 70 - 78.0 nm, the film thickness of the third spacer dielectric composite layer is 70 - 78.0 nm, and the first spacer dielectric composite layer, the second spacer dielectric composite layer and the third spacer dielectric composite layer are all composed of zinc oxide and aluminum oxide.

[0041] In the embodiment of the present invention, the film thickness of the first absorption layer is 3 - 5 nm, and it is composed of metallic copper.

[0042] In the embodiment of the present invention, the thickness of the second dielectric composite layer is 30 - 40.0 nm, and it is composed of silicon nitride, zinc oxide and aluminum oxide.

[0043] Example 2

[0044] A preparation method of a gray four-silver low-emissivity glass, including sequentially depositing each functional layer on a glass substrate by magnetron sputtering technology, specifically including:

[0045] Depositing a first dielectric composite layer on the glass substrate by magnetron sputtering, and the first dielectric composite layer is composed of silicon nitride, zinc oxide and aluminum oxide;

[0046] Depositing a first functional layer silver layer on the first dielectric composite layer by magnetron sputtering;

[0047] Depositing a first protective layer composed of nickel-chromium alloy on the first functional layer silver layer by magnetron sputtering;

[0048] Depositing a first spacer dielectric composite layer composed of zinc oxide and aluminum oxide on the first protective layer by magnetron sputtering;

[0049] Depositing a second functional layer silver layer on the first spacer dielectric composite layer by magnetron sputtering;

[0050] Depositing a first absorption layer composed of metallic copper on the second functional layer silver layer by magnetron sputtering;

[0051] A second protective layer composed of nickel-chromium alloy is deposited on the first absorption layer by magnetron sputtering;

[0052] A second spacer dielectric composite layer composed of zinc oxide and aluminum oxide is deposited on the second protective layer by magnetron sputtering;

[0053] A third functional layer silver layer is deposited on the second spacer dielectric composite layer by magnetron sputtering;

[0054] A third protective layer composed of nickel-chromium alloy is deposited on the third functional layer silver layer by magnetron sputtering;

[0055] A third spacer dielectric composite layer composed of zinc oxide and aluminum oxide is deposited on the third protective layer by magnetron sputtering;

[0056] A fourth functional layer silver layer is deposited on the third spacer dielectric composite layer by magnetron sputtering;

[0057] A fourth protective layer composed of nickel-chromium alloy is deposited on the fourth functional layer silver layer by magnetron sputtering;

[0058] A second dielectric composite layer composed of silicon nitride, zinc oxide and aluminum oxide is deposited on the fourth protective layer by magnetron sputtering.

[0059] Example 3

[0060] A gray four-silver low-emissivity glass includes a glass substrate, and the following are sequentially arranged on the glass substrate: a first dielectric composite layer, a first functional layer, a first protective layer, a first spacer dielectric composite layer, a second functional layer, a first absorption layer, a second protective layer, a second spacer dielectric composite layer, a third functional layer, a third protective layer, a third spacer dielectric composite layer, a fourth functional layer, a fourth protective layer and a second dielectric composite layer.

[0061] The first functional layer, the second functional layer, the third functional layer and the fourth functional layer in the embodiments of the present invention are all silver layers.

[0062] The film thickness of the first dielectric composite layer in the embodiments of the present invention is 28.0 nm, and the composition is silicon nitride, zinc oxide and aluminum oxide.

[0063] The film thickness of the first functional layer in the embodiments of the present invention is 11.7 nm, and the composition is metallic silver.

[0064] The film thickness of the first protective layer in the embodiments of the present invention is 0.5 nm; the composition is metallic nickel-chromium alloy.

[0065] The film thickness of the first spacer dielectric composite layer in the embodiments of the present invention is 75.0 nm, and its composition is zinc oxide-aluminum oxide.

[0066] In the embodiment of the present invention, the film thickness of the second functional layer is 10.3 nm, and its composition is silver metal.

[0067] In the embodiment of the present invention, the film thickness of the first absorption layer is 2.6 nm, and its composition is copper metal.

[0068] In the embodiment of the present invention, the film thickness of the second protective layer is 0.5 nm; its composition is nickel-chromium alloy.

[0069] In the embodiment of the present invention, the film thickness of the second dielectric composite layer is 76.0 nm, and its composition is zinc oxide-aluminum oxide.

[0070] In the embodiment of the present invention, the film thickness of the third functional layer is 17.8 nm, and its composition is silver metal.

[0071] In the embodiment of the present invention, the film thickness of the third protective layer is 0.5 nm; its composition is nickel-chromium alloy.

[0072] In the embodiment of the present invention, the film thickness of the third dielectric composite layer is 76.0 nm, and its composition is zinc oxide-aluminum oxide.

[0073] In the embodiment of the present invention, the film thickness of the fourth functional layer is 15.4 nm, and its composition is silver metal.

[0074] In the embodiment of the present invention, the film thickness of the fourth protective layer is 0.5 nm, and its composition is nickel-chromium alloy.

[0075] In the embodiment of the present invention, the thickness of the second dielectric composite layer is 37.0 nm, and its composition is silicon nitride, zinc oxide and aluminum oxide.

[0076] In the embodiment of the present invention, for the gray low-emissivity four-silver energy-saving glass, after coating and single-piece tempering on 6-mm glass, the glass surface is gray, the visible light reflectivity is 10.7%, and the transmittance is 57%.

[0077] The specific color of the gray low-emissivity four-silver energy-saving glass in the embodiment of the present invention is shown in Table 1:

[0078] Table 1

[0079]

[0080] After the gray low-emissivity four-silver energy-saving glass in the embodiment of the present invention is fabricated into a hollow glass structure of 6-mm glass + 12-mm air layer + 6-mm glass (6C + 12A + 6C), through test characterization, the shading coefficient Sc value of this structure is 0.23; the thermal performance test shows that its heat transfer coefficient K value reaches 1.57 W / (m 2·K); Meanwhile, the light to solar gain ratio (LSG) reaches 2.18, indicating that this glass structure can effectively block near-infrared thermal radiation while maintaining a high visible light transmittance, reflecting the low-emissivity characteristics of the glass of the present invention.

[0081] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0082] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gray four-silver low-emissivity glass, characterized in that: The invention comprises a glass substrate, on which are arranged in sequence: a first dielectric combination layer, a first functional layer, a first protective layer, a first spacer layer dielectric combination layer, a second functional layer, an absorption layer, a second protective layer, a second spacer layer dielectric combination layer, a third functional layer, a third protective layer, a third spacer layer dielectric combination layer, a fourth functional layer, a fourth protective layer and a second dielectric combination layer; wherein the absorption layer is composed of metal copper; the first functional layer, the second functional layer, the third functional layer and the fourth functional layer are all silver layers; the first protective layer, the second protective layer, the third protective layer and the fourth protective layer are all composed of metal nickel-chromium alloy; the first dielectric combination layer and the second dielectric combination layer are both composed of silicon nitride, zinc oxide and aluminum oxide; the first spacer layer dielectric combination layer, the second spacer layer dielectric combination layer and the third spacer layer dielectric combination layer are composed of zinc oxide and aluminum oxide.

2. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The first dielectric composite layer has a film thickness of 25-30 nm and is composed of silicon nitride, zinc oxide and aluminum oxide.

3. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The thickness of the first functional layer is 10-11 nm; the thickness of the second functional layer is 10-11 nm; the thickness of the third functional layer is 16-18 nm; and the thickness of the fourth functional layer is 14-16 nm.

4. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The first protective layer, the second protective layer, the third protective layer and the fourth protective layer all have a film thickness of 0.5-1 nm and are all made of a metal nickel-chromium alloy.

5. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The film thickness of the first spacer layer dielectric combination layer is 70.0-78.0nm, the film thickness of the second spacer layer dielectric combination layer is 70-78.0nm, and the film thickness of the third spacer layer dielectric combination layer is 70-78.0nm. The first spacer layer dielectric combination layer, the second spacer layer dielectric combination layer and the third spacer layer dielectric combination layer are all composed of zinc oxide and aluminum oxide.

6. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The first absorption layer has a film thickness of 3-5 nm and is composed of metal copper.

7. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The second dielectric composite layer has a thickness of 30-40.0 nm and is composed of silicon nitride, zinc oxide and aluminum oxide.

8. The gray four-silver low-emissivity glass according to claim 1, characterized in that: The magnetron sputtering technology is used to deposit various functional layers on the glass substrate in sequence, including: Plating a first dielectric composite layer on the glass substrate by magnetron sputtering, wherein the first dielectric composite layer consists of silicon nitride, zinc oxide and aluminum oxide; Plating a first functional layer of silver on the first dielectric combination layer by magnetron sputtering; Plating a first protective layer composed of a nickel-chromium alloy on the first functional layer silver layer by magnetron sputtering; Plating a first spacer dielectric composite layer consisting of zinc oxide and aluminum oxide on the first protective layer by magnetron sputtering; Plating a second functional layer of silver on the first spacer layer dielectric combination layer by magnetron sputtering; Plating a first absorption layer composed of metal copper on the second functional layer silver layer by magnetron sputtering; Plating a second protective layer composed of a nickel-chromium alloy on the first absorption layer by magnetron sputtering; Plating a second spacer dielectric composite layer consisting of zinc oxide and aluminum oxide on the second protective layer by magnetron sputtering; Plating a third functional layer of silver on the second spacer layer dielectric combination layer by magnetron sputtering; Plating a third protective layer composed of a nickel-chromium alloy on the third functional layer silver layer by magnetron sputtering; Plating a third spacer dielectric composite layer consisting of zinc oxide and aluminum oxide on the third protective layer by magnetron sputtering; Plating a fourth functional layer of silver on the third spacer layer dielectric combination layer by magnetron sputtering; Plating a fourth protective layer composed of a nickel-chromium alloy on the fourth functional layer silver layer by magnetron sputtering; A second dielectric composite layer consisting of silicon nitride, zinc oxide and aluminum oxide is plated on the fourth protective layer by magnetron sputtering.

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