Tempering low-emissivity coated glass structure

Abstract

The utility model discloses a temperable low-emissivity coated glass structure, and relates to the technical field of coated glass, the temperable low-emissivity coated glass structure comprises a glass substrate, and a first dielectric layer, a first protective layer, a functional layer, a second protective layer and a second dielectric layer are sequentially laminated on the glass substrate; wherein the thickness ratio of the first protective layer to the second protective layer is (1.1-1.6): 1. According to the technical scheme provided by the utility model, the protective effects such as stripping resistance of the film layer can be improved, and the oxidation resistance in the hot working process such as tempering can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coated glass technical field especially relates to a kind of steeling low emissivity coated glass structure. BACKGROUND

[0002] With the large-scale application of glass curtain wall in high-rise building, low emissivity coated glass meeting the requirements of energy saving and environmental protection is highly respected. Low emissivity coated glass will make the building appearance produce the ultimate visual experience of up-down integration, smooth as mirror while ensuring internal privacy. In order to ensure that the coated glass has enough strength to meet daily use, it needs to be tempered. And the traditional coated glass will be oxidized and the crystal form will change due to the high temperature of tempering, which will lead to the occurrence of phenomena such as film separation and oxidation. Based on the above consideration, a steeling low emissivity coated glass structure capable of improving the anti-film separation protection of the film layer and enhancing the anti-oxidation ability in the process of heat treatment such as tempering is needed.

[0003] It should be noted that the above content is only used to assist in understanding the technical scheme of the utility model, and does not mean that the above content is prior art. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a steeling low emissivity coated glass structure, which can improve the anti-film separation protection of the film layer and enhance the anti-oxidation ability in the process of heat treatment such as tempering.

[0005] To achieve the above purpose, the utility model provides a steeling low emissivity coated glass structure, which comprises a glass substrate, and a first dielectric layer, a first protective layer, a functional layer, a second protective layer and a second dielectric layer are sequentially stacked on the glass substrate. The thickness ratio of the first protective layer to the second protective layer is 1.1~1.6:1.

[0006] In an embodiment, the thickness ratio of the first dielectric layer to the second dielectric layer is 1:1.6~2.3.

[0007] In an embodiment, the thickness ratio of the functional layer to the first protective layer is 1.2~1.4:1.

[0008] In an embodiment, the first dielectric layer comprises a SiNx layer, which covers the glass substrate. The thickness of the first dielectric layer is 18~30nm.

[0009] In an embodiment, the first protective layer comprises a NiCr layer, which covers the side of the first dielectric layer away from the glass substrate. The thickness of the first protective layer is 3~6nm.

[0010] In an embodiment, the functional layer comprises a metal material, the functional layer covers one side of the first protective layer away from the first dielectric layer, and the thickness of the functional layer is 6-8nm.

[0011] In an embodiment, the metal material is a single silver material.

[0012] In an embodiment, the second protective layer comprises a NiCr layer, the second protective layer covers one side of the functional layer away from the first protective layer, and the thickness of the second protective layer is 3-5nm.

[0013] In an embodiment, the second dielectric layer comprises a SiNx layer, the second dielectric layer covers one side of the second protective layer away from the functional layer, and the thickness of the second dielectric layer is 40-60nm.

[0014] In an embodiment, the glass substrate is formed with the first dielectric layer, the first protective layer, the functional layer, the second protective layer and the second dielectric layer in sequence by a vacuum magnetron sputtering method.

[0015] The technical scheme of the utility model discloses a metal layer composed of a first protective layer, a functional layer and a second protective layer has certain absorption and reflection effects on visible light, the functional layer comprises a metal material capable of reducing solar radiation to achieve the purpose of low radiation, and the thickness ratio of the first protective layer to the second protective layer is set to 1.1-1.6:1, simulation and debugging show that when the thickness ratio of the first protective layer to the second protective layer is set in the range, the mechanical properties and permeability of the product are best, and the tempering process is most stable, so that the anti-peeling and other protective effects of the film layer can be effectively improved, and the oxidation resistance during the heat processing process such as tempering can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description can also be used to obtain other drawings without creative labor for those skilled in the art.

[0017] Figure 1 An embodiment of the structure of the low radiation and temperable coated glass structure provided by the utility model is shown in the structure diagram.

[0018] The realization, functional characteristics and advantages of the utility model will be further illustrated with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0019] The technical solutions in the utility model will be clearly and completely described below in combination with the drawings in the utility model. Obviously, only some of the embodiments of the utility model are described, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative work belong to the scope of protection of the utility model.

[0020] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0021] In addition, it should be noted that the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the ordinary skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the utility model.

[0022] With the large-scale application of glass curtain walls in high-rise buildings, low-emissivity coated glass meeting the requirements of energy saving and environmental protection is highly praised. The low-emissivity coated glass can ensure the privacy of the interior while making the building appearance produce the extreme visual experience of being integrated up and down and smooth like a mirror. In order to ensure that the coated glass has sufficient strength to meet daily use, it needs to be tempered. However, the traditional coated glass will be oxidized and the crystal type will change due to the high temperature of tempering, which will cause the film to be detached and oxidized.

[0023] To solve the above technical problems, the utility model provides a kind of structure of low-emissivity coated glass that can be tempered.

[0024] Please refer to Figure 1 In an embodiment of the utility model, the structure of low-emissivity coated glass that can be tempered includes a glass substrate, a first dielectric layer, a first protective layer, a functional layer, a second protective layer and a second dielectric layer are sequentially stacked on the glass substrate;The thickness ratio of the first protective layer to the second protective layer is 1.1~1.6:1.

[0025] The technical scheme of the utility model discloses a metal layer formed by a first protective layer, a functional layer and a second protective layer has certain absorption and reflection effects on visible light, wherein the functional layer comprises a metal material capable of reducing solar radiation to achieve the purpose of low radiation; and the thickness ratio of the first protective layer to the second protective layer is set to 1.1-1.6:1, simulation and debugging find that setting the thickness ratio of the first protective layer to the second protective layer in the range makes the mechanical properties and permeability of the product best and the tempering process most stable; thereby effectively improving the anti-peeling protection of the film layer and the oxidation resistance in the heat processing process such as tempering.

[0026] Further, the thickness ratio of the first dielectric layer to the second dielectric layer is 1:1.6-2.3. By thickening the outermost second dielectric layer, the anti-peeling protection of the film layer is further improved, and the oxidation resistance in the heat processing process such as tempering is further improved. Meanwhile, to improve the stability of the film layer in the heat processing process, the thickness of the first dielectric layer is increased as much as possible under the premise of ensuring the structure ratio of the film layer.

[0027] Further, the thickness ratio of the functional layer to the first protective layer is 1.2-1.4:1. Simulation and debugging find that setting the thickness ratio of the functional layer to the first protective layer in the range can ensure that the outdoor color brightness L of the product reaches 51, and the overall color of the product remains relatively stable before and after the heat processing process such as tempering, without large color difference changes.

[0028] Specifically, the first dielectric layer comprises a SiNx layer, and the first dielectric layer is covered on the glass substrate; the thickness of the first dielectric layer is 18-30 nm. By using the first dielectric layer as a primer layer, the sodium element in the glass substrate is prevented from diffusing and migrating into the film layer, and the structure of the functional layer is damaged.

[0029] Specifically, the first protective layer comprises a NiCr layer, and the first protective layer is covered on the side of the first dielectric layer away from the glass substrate; the thickness of the first protective layer is 3-6 nm. The first protective layer protects the functional layer and prevents the functional layer from being oxidized in the high-temperature environment of the heat processing process.

[0030] Specifically, the functional layer comprises a metal material, the functional layer covers a side of the first protective layer away from the first dielectric layer, and the thickness of the functional layer is 6-8 nm. Preferably, the metal material is single silver material. In this way, the low radiation performance of the single silver material is used to reduce the radiation of the coated glass, the sunlight is filtered into cold light source, and the light transmission performance is improved. At the same time, the single silver material is used as the functional layer, so that the appearance color of the coated glass is bright silver, clear and beautiful, and the overall appearance degree is effectively improved.

[0031] Specifically, the second protective layer comprises a NiCr layer, the second protective layer covers a side of the functional layer away from the first protective layer, and the thickness of the second protective layer is 3-5 nm. In this way, the second protective layer has the same effect as the first protective layer, and is used for oxidation of the functional layer in the high-temperature environment of the heat processing process.

[0032] Specifically, the second dielectric layer comprises a SiNx layer, the second dielectric layer covers a side of the second protective layer away from the functional layer, and the thickness of the second dielectric layer is 40-60 nm. In this way, since the second dielectric layer is located at the outermost side of the film layer, the SiNx layer is used as the second dielectric layer, the high hardness and strong wear resistance of the SiNx layer are used to improve the mechanical properties and scratch resistance of the film layer, so that the coated glass is not easy to be scratched, and the overall thermal stability of the film layer is improved in the heat processing process.

[0033] Regarding the preparation process of the above-mentioned steelable low-emissivity coated glass, the glass substrate is sequentially formed with the first dielectric layer, the first protective layer, the functional layer, the second protective layer and the second dielectric layer by vacuum magnetron sputtering. Specifically, the surface of the glass substrate is subjected to vacuum magnetron sputtering with a target material in a vacuum environment to sequentially form the first dielectric layer, the first protective layer, the functional layer, the second protective layer and the second dielectric layer to form a film layer.

[0034] In the above-mentioned steelable low-emissivity coated glass preparation method, the target materials used in the cathode position during magnetron sputtering are silicon-aluminum target, nickel-chromium target, silver target, nickel-chromium target and silicon-aluminum target in sequence. Specifically, the silicon-aluminum target is a silicon-aluminum alloy target with a silicon-aluminum weight ratio of 90:10, the silver target has a purity of 99.99%, and the nickel-chromium target is a nickel-chromium alloy target with a nickel-chromium weight ratio of 80:20. Among them, the silver target and the nickel-chromium target are planar targets, and the silicon-aluminum alloy target is a rotating target.

[0035] In the above preparation method of the toughenable low-emissivity coated glass, during magnetron sputtering, power control is used, so as to ensure stable sputtering and not damage the target material; the silicon-aluminum target power is 0-70Kw, the sputtering process gas is high-purity argon and high-purity nitrogen in a ratio of 1:1, and the sputtering gas pressure is 2-5*10-3mbar; the silver target power is 0-20Kw, the nickel-chromium target power is 0-20Kw, the sputtering process gas is high-purity argon, and the sputtering gas pressure is 2-5*10-3mbar.

[0036] The 6mm coated glass single piece prepared by the above method has a transmittance T of 50-60%, a* of -2.5 to -4.5, and b* of -1 to -4; the glass surface color L is 44-55, a* is -1.5 to 3.5, and b* is -4.5 to -7.5. The glass surface color outdoors is bright silver, and the emissivity is 0.10-0.12. It is shown that the transmittance of the product after toughening reaches more than 50%, and the product has excellent heat processing performance and mechanical properties. The color consistency of the toughened product and the non-toughened product is good, and after the toughening process, the film layer is stable and does not have defects such as cracking, oxidation, and film peeling.

[0037] In combination with the above content, the application discloses the following embodiments:

[0038] Embodiment 1:

[0039] The film layer structure in this embodiment is as follows: the first dielectric layer SiNx layer has a thickness of 20nm, the first protective layer NiCr layer has a thickness of 4.62nm, the functional layer single silver layer has a thickness of 6.468nm, the second protective layer NiCr layer has a thickness of 4.2nm, and the second dielectric layer SiNx layer has a thickness of 46nm; wherein the thickness ratio of the first protective layer to the second protective layer is 1.1:1.

[0040] The 6mm coated glass single piece of this film layer structure has stable heat processing performance and does not have defects such as cracking, oxidation, film peeling, and scratching. After the heat processing process and toughening treatment, the transmittance T is 53.1%, a* is -3.84, and b* is -1.58; the glass surface color L is 50.38, a* is -2.78, and b* is -6.05. The outdoor color after hollowing is synthesized as L 51.67, a* is -2.6, and b* is -5.6. The emissivity is 0.11.

[0041] Embodiment 2:

[0042] The film layer structure in this embodiment is as follows: the first dielectric layer SiNx layer has a thickness of 25nm, the first protective layer NiCr layer has a thickness of 5.76nm, the functional layer single silver layer has a thickness of 6.912nm, the second protective layer NiCr layer has a thickness of 3.6nm, and the second dielectric layer SiNx layer has a thickness of 40nm; wherein the thickness ratio of the first protective layer to the second protective layer is 1.6:1.

[0043] The 6mm coated glass single piece of this film layer structure has stable heat processing performance, and does not appear defects such as cracking, oxidation, film peeling and scratching. After the heat processing process of tempering treatment, the transmittance T is 52.31%, a* is -3.68, and b* is -2.12; the glass surface color L is 49.58, a* is -2.33, and b* is -5.75. The outdoor color of the synthesized hollow glass is 50.13, a* is -2.12, and b* is -2.55. The emissivity is 0.10.

[0044] In order to facilitate comparison, the above content will be integrated into a table for analysis as follows:

[0045] Table 1: Film layer structure and thickness of each embodiment;

[0046]

[0047] Table 2: Color values of 6mm coated glass single piece after tempering of each embodiment;

[0048]

[0049] Table 3: Color values and reflectivity of 6mm coated glass single piece and 6mm white glass synthesized hollow glass of each embodiment;

[0050]

[0051] As can be seen from the above, the 6mm coated glass single piece after tempering prepared by the method has a transmittance T of 50-60%, a* of -2.5 to -4.5, and b* of -1 to -4; the glass surface color brightness value L is 44-55, a* is -1.5 to 3.5, and b* is -4.5 to -7.5. The outdoor color of the glass surface is bright silver, and the emissivity is 0.10-0.12; it is shown that the transmittance of the product after tempering reaches more than 50%, and has excellent heat processing performance and mechanical performance. The tempered product and the untempered product have good color consistency, and after the tempering process, the film layer is stable, and does not appear defects such as cracking, oxidation and film peeling.

[0052] It should be noted that other contents of the steelable low-emissivity coated glass structure disclosed in the utility model are prior art, which will not be described here.

[0053] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any direct / indirect application of the utility model in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A toughenable low-e coated glass structure, characterized in that, The temperable low-emissivity coated glass structure includes a glass substrate, on which a first dielectric layer, a first protective layer, a functional layer, a second protective layer, and a second dielectric layer are sequentially stacked; wherein the thickness ratio of the first protective layer to the second protective layer is 1.1-1.6:1; and the thickness ratio of the first dielectric layer to the second dielectric layer is 1:1.6-2.

3.

2. The toughenable low-e coated glass structure of claim 1, wherein: The thickness ratio of the functional layer to the first protective layer is 1.2-1.4:

1.

3. The toughenable low-e coated glass structure of claim 1, wherein: The first dielectric layer includes a SiNx layer, and the first dielectric layer covers the glass substrate; the thickness of the first dielectric layer is 18-30 nm.

4. The toughenable low-e coated glass structure of claim 1, wherein: The first protective layer includes a NiCr layer, and the first protective layer covers a side of the first dielectric layer away from the glass substrate; the thickness of the first protective layer is 3-6 nm.

5. The toughenable low-e coated glass structure of claim 1, wherein: The functional layer includes a metal material and covers a side of the first protective layer away from the first dielectric layer; the thickness of the functional layer is 6-8 nm.

6. The toughenable low-e coated glass structure of claim 5, wherein: The metal material is single silver material.

7. The toughenable low-e coated glass structure of claim 1, wherein: The second protective layer includes a NiCr layer, and the second protective layer covers a side of the functional layer away from the first protective layer; the thickness of the second protective layer is 3-5 nm.

8. The toughenable low-e coated glass structure of claim 1, wherein: The second dielectric layer includes a SiNx layer, and the second dielectric layer covers a side of the second protective layer away from the functional layer; the thickness of the second dielectric layer is 40-60 nm.

9. The toughenable low-e coated glass structure of claim 1, wherein: The first dielectric layer, the first protective layer, the functional layer, the second protective layer and the second dielectric layer are sequentially formed on the glass substrate by vacuum magnetron sputtering.

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