High-efficiency heat-insulation low-radiation coated glass

Abstract

Belonging to the technical field of coated glass, the invention relates to an efficient thermal insulation low-emissivity coated glass, which comprises: a low-emissivity coating arranged on the surface of a glass substrate, the low-emissivity coating comprises at least two silver coatings and at least one dielectric layer arranged between the two adjacent silver coatings, the dielectric layer is a tin oxide layer or a zinc oxide layer so as to form a coating with higher infrared reflectivity and low emissivity; the high-light-transmittance coating is arranged on the low-radiation coating, the high-light-transmittance coating comprises indium tin oxide or zinc oxide, and the indium tin oxide or zinc oxide is deposited on the low-radiation coating through a sputtering method, so that the visible light transmittance of the glass is improved, and meanwhile, the heat insulation performance of the glass is kept; and the weather-resistant coating is arranged on the high-light-transmittance coating, and the weather-resistant coating comprises nano silicon dioxide or organosilane.

Description

Technical Field

[0001] The invention relates to the technical field of coated glass, and in particular to a high-efficiency heat-insulating low-radiation coated glass. Background Art

[0002] As the construction industry continues to increase its requirements for energy conservation and emission reduction, the performance of architectural glass has received more and more attention. The performance of traditional glass in terms of heat insulation, light transmittance and durability cannot meet the needs of modern buildings for efficient energy saving and comfortable environment. Therefore, developing an efficient heat insulation technology that can improve the performance of architectural glass has become an important research direction in the field of building materials today.

[0003] As an effective energy-saving technology, LOW-E (low-emissivity) coating technology is widely used in architectural glass. It reflects infrared radiation through the coating, reduces heat conduction, reduces energy consumption such as air conditioning, and improves the energy efficiency of buildings. However, while traditional LOW-E coating technology improves thermal insulation performance, it often sacrifices the light transmittance of glass, resulting in insufficient natural light indoors and increased demand for artificial lighting. In addition, traditional coatings have poor weather resistance and are easily affected by climate change, resulting in reduced coating performance, aging of the glass surface, and poor wear resistance, which affects the service life of the glass.

[0004] In order to solve these problems, the industry has continuously improved the LOW-E coating technology and proposed a combination of double-silver LOW-E coating, transparent conductive coating and weather-resistant coating. Double-silver LOW-E coating can effectively improve the thermal insulation performance of glass, but the light transmittance is low; while transparent conductive coating (such as indium tin oxide or zinc oxide coating) can improve the light transmittance, but its thermal insulation performance is often not comparable to that of double-silver coating. The introduction of weather-resistant coating can effectively improve the wear resistance and anti-aging performance of glass and extend its service life. Therefore, how to ensure the light transmittance and weather resistance of glass while improving the thermal insulation performance has become a technical problem in the field of architectural glass. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-efficiency heat-insulating low-emissivity coated glass to solve the problems raised in the background technology.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides a high-efficiency heat-insulating low-emissivity coated glass, comprising:

[0007] A low-emissivity coating, wherein the low-emissivity coating is disposed on the surface of the glass substrate, the low-emissivity coating comprises at least two layers of silver coating and at least one layer of dielectric layer, the dielectric layer is disposed between two adjacent layers of the silver coating to form a coating with higher infrared reflectivity and low emissivity, and the dielectric layer is a tin oxide layer or a zinc oxide layer;

[0008] A high-transmittance coating, wherein the high-transmittance coating is disposed on the low-emissivity coating, and the high-transmittance coating comprises indium tin oxide or zinc oxide, and the indium tin oxide or zinc oxide is deposited on the low-emissivity coating by sputtering to improve the visible light transmittance of the glass while retaining its heat insulation performance;

[0009] A weather-resistant coating is provided on the high-transmittance coating, and the weather-resistant coating comprises nano-silicon dioxide or organic silane to enhance the wear resistance and anti-aging performance of the glass surface and prolong the service life.

[0010] Furthermore, the low-emissivity coating includes a first silver coating and a second silver coating, and a first dielectric layer and a second dielectric layer. The first silver coating is arranged on the glass substrate, a first dielectric layer is arranged on the first silver coating, a second silver coating is arranged on the first dielectric layer, a second dielectric layer is arranged on the second silver coating, the first dielectric layer is arranged on the second dielectric layer, the first dielectric layer is a tin oxide layer, and the second dielectric layer is a zinc oxide layer.

[0011] Furthermore, the method for preparing the high-efficiency heat-insulating low-emissivity coated glass comprises the following steps:

[0012] S1. Raw material preparation:

[0013] Silver raw material: High-purity silver target is used to deposit the first silver coating and the second silver coating. The purity of silver is greater than or equal to 99.99% to ensure that the coating has high reflectivity and low emissivity;

[0014] Dielectric layer materials: Tin oxide and zinc oxide are used as materials for the first and second dielectric layers, both of which are selected to be electronic grade pure. The thickness of the tin oxide layer and the zinc oxide layer are both 10-20 nanometers, which can effectively improve the reflectivity and stability of the coating;

[0015] High transmittance coating material: Indium tin oxide or zinc oxide is used as a high transmittance coating, and high-purity ITO target material is selected to ensure the high transmittance of the high transmittance coating;

[0016] Weather-resistant coating materials: Weather-resistant coatings include nano-silica or organosilane, with the particle size of silica particles being 30-50 nanometers to provide excellent wear resistance and anti-aging properties.

[0017] S2. Coating preparation steps:

[0018] Deposition of Low-E Coatings:

[0019] A first silver coating and a second silver coating are deposited on a glass substrate by magnetron sputtering technology. First, the glass substrate is cleaned to remove surface pollutants to improve coating adhesion. Then, a silver target and a tin oxide and / or zinc oxide target are alternately sputtered by magnetron sputtering equipment to form a multilayer structure of a first silver coating, a second silver coating and a first dielectric layer and / or a second dielectric layer. The thickness of the first silver coating and the second silver coating is 20-40 nanometers, and the thickness of the first dielectric layer and / or the second dielectric layer is 10-20 nanometers.

[0020] During the deposition process, the vacuum pressure was 2×10 -6 Pa, the temperature is 150 ° C to ensure the uniformity and quality of the coating. This step will form a coating with high infrared reflectivity and low emissivity to improve thermal insulation performance;

[0021] Deposition of high light transmittance coatings:

[0022] On top of the low-emissivity coating, a high-transmittance coating is deposited by sputtering. Indium tin oxide or zinc oxide is selected as the material. During the sputtering process, the sputtering power is adjusted to 150W, and the deposition time is controlled to 10-15 minutes. The thickness of the high-transmittance coating is 50-80 nanometers, ensuring that the visible light transmittance reaches more than 90%, while not affecting the thermal insulation performance of the LOW-E coating;

[0023] Application of weather-resistant coating

[0024] Finally, a weather-resistant coating is applied to the outermost layer of the glass. The weather-resistant coating material containing nano-silicon dioxide or organic silane is evenly applied on the glass surface by spraying or dipping. The thickness of the weather-resistant coating is controlled within the range of 10-20 nanometers. The coating is applied in a dust-free environment to avoid coating contamination. After the coating is completed, the glass surface is heated at a temperature of 150°C for more than 20 minutes to cure the coating.

[0025] S3. Performance test of coating

[0026] Light transmittance test:

[0027] The transmittance of the coated glass was tested using a spectrophotometer with a measurement wavelength range of 300-800nm;

[0028] Thermal insulation performance test:

[0029] The thermal insulation performance of the coated glass was tested using a thermal radiometer and a temperature sensor. The prepared glass samples were exposed to an environment with a large temperature difference between indoors and outdoors to test their infrared reflectivity and emissivity.

[0030] Weathering test

[0031] The coated glass samples were exposed to high temperature and high humidity environment for accelerated aging test. After 60 days, their surface hardness and optical properties were tested. The test results showed that the weather-resistant coating can effectively maintain the wear resistance and anti-aging properties of the glass. There was no obvious peeling or discoloration of the coating. The optical properties of the coating remained stable, which extended the service life of the glass.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The high-efficiency heat-insulating low-emissivity coated glass of this application can significantly improve the performance of glass used in the construction industry:

[0034] Thermal insulation performance: The low-emissivity coating of this application can effectively reflect infrared radiation, reduce heat accumulation inside the building, and improve indoor comfort. Experiments have shown that the indoor temperature can be reduced by 3-5 degrees Celsius and air conditioning energy consumption can be reduced by 15-20%;

[0035] Light transmittance: The high light transmittance coating of the present application can increase the amount of natural light transmitted while maintaining thermal insulation performance, improve the quality of indoor light, and reduce the need for artificial lighting;

[0036] Weather resistance: The weather-resistant coating of the present application can enhance the wear resistance and anti-aging performance of the glass, maintain stable performance under adverse climatic conditions, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a partial cross-sectional structural schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the invention, rather than all the embodiments. The embodiments of the present invention are described below in conjunction with the drawings.

[0039] refer to Figure 1 The present application discloses a high-efficiency heat-insulating low-emissivity coated glass, comprising:

[0040] A low-emissivity coating, wherein the low-emissivity coating is disposed on the surface of the glass substrate 1, and the low-emissivity coating comprises at least two layers of silver coatings 2 and at least one layer of dielectric layer 3, wherein the dielectric layer 3 is disposed between two adjacent layers of silver coatings 2 to form a coating having higher infrared reflectivity and low emissivity, and the dielectric layer 3 is a tin oxide layer or a zinc oxide layer;

[0041] If there are two layers of silver coating 2, a dielectric layer 3 may be provided. When preparing two layers of silver coating 2 and a dielectric layer 3, a layer of silver coating 2 is provided on the surface of the glass substrate 1, and a layer of dielectric layer 3 is prepared, and another layer of silver coating 2 is formed on the dielectric layer 3;

[0042] If there are two layers of silver coating 2, two layers of dielectric layer 3 can also be provided, and the two layers of dielectric layer 3 can be alternately provided with the two layers of silver coating 2 to form a low-emissivity coating;

[0043] A high-transmittance coating 4, wherein the high-transmittance coating 4 is disposed on the low-emissivity coating, and the high-transmittance coating 4 comprises indium tin oxide or zinc oxide, and the indium tin oxide or zinc oxide is deposited on the low-emissivity coating by sputtering to form an indium tin oxide layer or a zinc oxide layer, so as to improve the visible light transmittance of the glass while retaining its heat insulation performance;

[0044] A weather-resistant coating 5, which is disposed on the high-transmittance coating 4 and includes nano-silicon dioxide or organic silane to enhance the wear resistance and anti-aging performance of the glass surface and extend the service life;

[0045] The low-emissivity coating comprises a first silver coating 2 and a second silver coating 2, the first silver coating 2 and the second silver coating 2 have the same structure, and a first dielectric layer 3 and a second dielectric layer 3, the first silver coating 2 is arranged on a glass substrate 1, the first dielectric layer 3 is arranged on the first silver coating 2, the second silver coating 2 is arranged on the first dielectric layer 3, the second silver coating 2 is arranged on the second dielectric layer 3, the first dielectric layer 3 is arranged on the second silver coating 2, the first dielectric layer 3 is a tin oxide layer, and the second dielectric layer 3 is a zinc oxide layer;

[0046] The method for preparing high-efficiency heat-insulating low-emissivity coated glass comprises the following steps:

[0047] S1. Raw material preparation:

[0048] Silver raw material: a high-purity silver target is selected for depositing the first silver coating 2 and the second silver coating 2, and the purity of the silver is 99.99% or more to ensure that the coating has high reflectivity and low emissivity;

[0049] Dielectric layer 3 raw materials: tin oxide and zinc oxide are used as materials for the first dielectric layer 3 and the second dielectric layer 3, both of which are selected to be electronic grade purity, and the thickness of the tin oxide layer and the zinc oxide layer are both 10-20 nanometers, which can effectively improve the reflectivity and stability of the coating;

[0050] If the number of dielectric layers 3 is one, a tin oxide layer or a zinc oxide layer is selected according to the need; if the number of dielectric layers 3 is two, one layer can be a tin oxide layer and the other layer can be a zinc oxide layer;

[0051] High transmittance coating 4 material: Indium tin oxide or zinc oxide is used as the high transmittance coating 4, and a high-purity ITO target material is selected to ensure the high transmittance of the high transmittance coating 4, and the expected visible light transmittance is more than 90%;

[0052] Weather-resistant coating 5 material: The weather-resistant coating 5 includes nano-silicon dioxide or organic silane, wherein the particle size of the silicon dioxide particles is 30-50 nanometers to provide excellent wear resistance and anti-aging performance;

[0053] S2. Coating preparation steps:

[0054] Deposition of Low-E Coatings:

[0055] A first silver coating 2 and a second silver coating 2 are deposited on a glass substrate by magnetron sputtering technology. First, the glass substrate is cleaned to remove surface pollutants to improve coating adhesion. Then, a silver target and a tin oxide and / or zinc oxide target are alternately sputtered by a magnetron sputtering device to form a multilayer structure of the first silver coating 2, the second silver coating 2 and the first dielectric layer 3 and / or the second dielectric layer 3. The thickness of the first silver coating 2 and the second silver coating 2 is 20-40 nanometers, and the thickness of the first dielectric layer 3 and / or the second dielectric layer 3 is 10-20 nanometers.

[0056] During the deposition process, the vacuum pressure was 2×10 -6 Pa, the temperature is 150 ° C to ensure the uniformity and quality of the coating. This step will form a coating with high infrared reflectivity and low emissivity to improve thermal insulation performance;

[0057] Deposition of high light transmittance coating 4:

[0058] On top of the low-emissivity coating, a high-transmittance coating 4 is deposited by sputtering, and indium tin oxide or zinc oxide is selected as the material. During the sputtering process, the sputtering power is adjusted to 150W, and the deposition time is controlled to be 10-15 minutes. The thickness of the high-transmittance coating 4 is 50-80 nanometers, ensuring that the visible light transmittance reaches more than 90%, while not affecting the thermal insulation performance of the LOW-E coating;

[0059] Application of weather-resistant coating 5:

[0060] Finally, a weather-resistant coating 5 is applied to the outermost layer of the glass. The weather-resistant coating 5 material containing nano-silicon dioxide or organic silane is evenly applied to the glass surface by spraying or dipping. The thickness of the weather-resistant coating 5 is controlled within the range of 10-20 nanometers. The coating is applied in a dust-free environment to avoid coating contamination. After the coating is completed, the glass surface is heated at a temperature of 150° C. for more than 20 minutes to cure the coating.

[0061] S3. Performance test of coating

[0062] Light transmittance test:

[0063] The transmittance of the coated glass was tested using a spectrophotometer with a measuring wavelength range of 300-800nm. The test results showed that the prepared high transmittance coating 4 can significantly improve the visible light transmittance of the glass, and the transmittance in the visible light range reaches more than 90%;

[0064] Thermal insulation performance test:

[0065] The thermal insulation performance of the coated glass was tested using a thermal radiation meter and a temperature sensor. The prepared glass samples were exposed to an environment with a large temperature difference between indoors and outdoors to test their infrared reflectivity and emissivity. The test results showed that the low-emissivity coating has an extremely low infrared emissivity (less than 0.1), effectively reflects infrared radiation, reduces indoor heat accumulation, reduces indoor temperature by 3-5°C, and reduces air conditioning energy consumption by 15-20%;

[0066] Weathering test

[0067] The coated glass samples were exposed to a high temperature and high humidity environment (70°C, 80% relative humidity) for accelerated aging test. After 60 days, the surface hardness and optical property changes were tested. The test results showed that the weather-resistant coating 5 can effectively maintain the wear resistance and anti-aging properties of the glass. There was no obvious peeling or discoloration of the coating. The optical properties of the coating remained stable, which extended the service life of the glass.

[0068] Through the multi-layer coating design of the present invention, efficient heat insulation, excellent light transmittance and outstanding weather resistance of architectural glass are successfully achieved. Experimental data show that the low-emissivity coating significantly improves the heat insulation performance of the glass, while the high-transmittance coating 4 improves the visible light transmittance, and the weather-resistant coating 5 enhances the anti-aging and wear resistance of the glass. Overall, the technology of the present invention effectively improves the energy efficiency of architectural glass, reduces air-conditioning energy consumption, and extends the service life of the glass.

[0069] Compared with the prior art, the technical solution of this application has the following advantages:

[0070] The high-efficiency heat-insulating low-emissivity coated glass of this application can significantly improve the performance of glass used in the construction industry:

[0071] Thermal insulation performance: The low-emissivity coating of this application can effectively reflect infrared radiation, reduce heat accumulation inside the building, and improve indoor comfort. Experiments have shown that the indoor temperature can be reduced by 3-5 degrees Celsius and air conditioning energy consumption can be reduced by 15-20%;

[0072] Light transmittance: The high light transmittance coating 4 of the present application can increase the amount of natural light transmitted while maintaining the thermal insulation performance, improve the indoor light quality, and reduce the need for artificial lighting;

[0073] Weather resistance: The weather-resistant coating 5 of the present application can enhance the wear resistance and anti-aging performance of the glass, maintain stable performance under adverse climatic conditions, and extend the service life.

[0074] The technical solution of the present invention is described above in conjunction with specific implementation methods, but it should be noted that the above descriptions are only for explaining the solution of the present invention and cannot be interpreted in any way as a specific limitation on the scope of protection of the invention. Based on the explanation here, those skilled in the art can think of other specific implementation methods or equivalent replacements of the present invention without creative work, and they will all fall within the scope of protection of the present invention.

Claims

1. A high-efficiency heat-insulating low-emissivity coated glass, characterized in that: include: A low-emissivity coating, wherein the low-emissivity coating is disposed on the surface of the glass substrate, the low-emissivity coating comprises at least two layers of silver coating and at least one layer of dielectric layer, the dielectric layer is disposed between two adjacent layers of the silver coating to form a coating with higher infrared reflectivity and low emissivity, and the dielectric layer is a tin oxide layer or a zinc oxide layer; A high-transmittance coating, wherein the high-transmittance coating is disposed on the low-emissivity coating, and the high-transmittance coating comprises indium tin oxide or zinc oxide, and the indium tin oxide or zinc oxide is deposited on the low-emissivity coating by sputtering to improve the visible light transmittance of the glass while retaining its heat insulation performance; A weather-resistant coating is provided on the high-transmittance coating, and the weather-resistant coating comprises nano-silicon dioxide or organic silane to enhance the wear resistance and anti-aging performance of the glass surface and prolong the service life.

2. The high-efficiency heat-insulating low-emissivity coated glass according to claim 1, characterized in that: The low-emissivity coating includes a first silver coating and a second silver coating, and a first dielectric layer and a second dielectric layer. The first silver coating is arranged on the glass substrate, a first dielectric layer is arranged on the first silver coating, a second silver coating is arranged on the first dielectric layer, a second dielectric layer is arranged on the second silver coating, the first dielectric layer is arranged on the second dielectric layer, the first dielectric layer is a tin oxide layer, and the second dielectric layer is a zinc oxide layer.

3. The high-efficiency heat-insulating low-emissivity coated glass according to claim 2, characterized in that: The method for preparing the high-efficiency heat-insulating low-emissivity coated glass comprises the following steps: S1. Raw material preparation: Silver raw material: High-purity silver target is used to deposit the first silver coating and the second silver coating. The purity of silver is greater than or equal to 99.99% to ensure that the coating has high reflectivity and low emissivity; Dielectric layer materials: Tin oxide and zinc oxide are used as materials for the first and second dielectric layers, both of which are selected to be electronic grade pure. The thickness of the tin oxide layer and the zinc oxide layer are both 10-20 nanometers, which can effectively improve the reflectivity and stability of the coating; High transmittance coating material: Indium tin oxide or zinc oxide is used as a high transmittance coating, and high-purity ITO target material is selected to ensure the high transmittance of the high transmittance coating; Weather-resistant coating materials: Weather-resistant coatings include nano-silica or organosilane, where the particle size of the silica particles is 30-50 nanometers to provide excellent wear resistance and anti-aging properties; S2. Coating preparation steps: Deposition of Low-E Coatings: A first silver coating and a second silver coating are deposited on a glass substrate by magnetron sputtering technology. First, the glass substrate is cleaned to remove surface pollutants to improve coating adhesion. Then, a silver target and a tin oxide and / or zinc oxide target are alternately sputtered by magnetron sputtering equipment to form a multilayer structure of a first silver coating, a second silver coating and a first dielectric layer and / or a second dielectric layer. The thickness of the first silver coating and the second silver coating is 20-40 nanometers, and the thickness of the first dielectric layer and / or the second dielectric layer is 10-20 nanometers. During the deposition process, the vacuum pressure was 2×10 -6 Pa, the temperature is 150 ° C to ensure the uniformity and quality of the coating. This step will form a coating with high infrared reflectivity and low emissivity to improve thermal insulation performance; Deposition of high light transmittance coatings: On top of the low-emissivity coating, a high-transmittance coating is deposited by sputtering. Indium tin oxide or zinc oxide is selected as the material. During the sputtering process, the sputtering power is adjusted to 150W, and the deposition time is controlled to 10-15 minutes. The thickness of the high-transmittance coating is 50-80 nanometers, ensuring that the visible light transmittance reaches more than 90%, while not affecting the thermal insulation performance of the LOW-E coating; Application of weather-resistant coating Finally, a weather-resistant coating is applied to the outermost layer of the glass. The weather-resistant coating material containing nano-silicon dioxide or organic silane is evenly applied on the glass surface by spraying or dipping. The thickness of the weather-resistant coating is controlled within the range of 10-20 nanometers. The coating is applied in a dust-free environment to avoid coating contamination. After the coating is completed, the glass surface is heated at a temperature of 150°C for more than 20 minutes to cure the coating. S3. Performance test of coating Light transmittance test: The transmittance of the coated glass was tested using a spectrophotometer with a measurement wavelength range of 300-800nm; Thermal insulation performance test: The thermal insulation performance of the coated glass was tested using a thermal radiometer and a temperature sensor. The prepared glass samples were exposed to an environment with a large temperature difference between indoors and outdoors to test their infrared reflectivity and emissivity. Weathering test The coated glass samples were exposed to high temperature and high humidity environment for accelerated aging test. After 60 days, their surface hardness and optical properties were tested. The test results showed that the weather-resistant coating can effectively maintain the wear resistance and anti-aging properties of the glass. There was no obvious peeling or discoloration of the coating. The optical properties of the coating remained stable, which extended the service life of the glass.

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