Aerogel enhanced vacuum glass and preparation method thereof

Abstract

The invention relates to the technical field of vacuum glass, and discloses aerogel enhanced vacuum glass and a preparation method thereof.The glass comprises glass substrates which are vertically opposite, a vacuum glass bubble layer formed by aerogel micro-nano particles through high-temperature foaming and a fusion sealing structure between the substrates and the bubble layer. The preparation method comprises the steps of glass and aerogel particle pretreatment, particle laying, high-temperature foaming fusion in an inert gas environment, cooling foaming and post-treatment cutting. The product can be arbitrarily cut, supports multi-layer superposition, has a heat transfer coefficient of less than or equal to 1.0 W / (m < 2 >. K) and 100-1250Hz sound insulation attenuation of more than or equal to 31dB, is durable in sealing, is simplified in process, is low in cost, and is adaptive to multi-scene energy-saving requirements.

Description

Technical Field

[0001] This invention relates to the field of vacuum glass technology, and more specifically, to an aerogel-reinforced vacuum glass and its preparation method. Background Technology

[0002] Vacuum glass, as an excellent thermal insulation material, can improve the energy efficiency of buildings and vehicles and meets environmental protection requirements, thus driving demand. After more than 20 years of development in China, the basic theories, processes, product structures, and application areas of vacuum glass are basically mature. However, currently only a small number of companies are operating in this emerging industry. From an economic perspective, vacuum glass is still a very young field in China. In today's global advocacy for energy conservation and emission reduction, vacuum glass, with its unique advantages of superior thermal insulation, sound insulation, anti-frost properties, and long lifespan, is seeing its application areas continuously expand into various industries, showing an explosive growth trend in recent years.

[0003] Aerogel is a solid form of material, also known as dry gel. It occurs when most of the solvent is removed from the gel, resulting in a much lower liquid content than solid content, or when the gel's spatial network structure is filled with a gaseous medium, giving it a solid appearance. Aerogels typically have a nanoporous network structure, similar to a sponge, with over 90% of the pores filled with a gaseous dispersion medium; their specific surface area is between 400-1000 m². 2 / g; It possesses a highly permeable cylindrical multi-branched nanoporous three-dimensional network structure with extremely high porosity, extremely low density, extremely large specific surface area, and ultra-high pore volume fraction. It has the characteristics of high elasticity, strong adsorption, heat insulation, and wave absorption, and can be used in energy storage devices, heat insulation materials, aerospace detectors, clothing, lubricants, antimagnetic materials, etc.

[0004] The industry previously attempted to fill the gaps between insulating glass units with aerogel powder (forming "aerogel insulating glass"), but aerogel powder is prone to agglomeration, resulting in uneven thermal insulation performance; and it still relies on the aluminum spacer strip and butyl rubber sealing of the insulating glass, and has not yet gotten rid of the problems of "uncuttable and aging seal". In addition, the nanoporous structure of aerogel particles can carry air and has the potential for high-temperature foaming, but previous technologies did not use it as a "vacuum bubble source", but rather as a thermal insulation filler, which resulted in the dual functions of aerogel "radiation protection and foaming" not being activated, and the manufacturing process of vacuum glass could not be simplified.

[0005] Therefore, developing a vacuum glass reinforced with aerogel that is simple to manufacture, cuttable, high-performance, and low-cost has significant practical implications. Summary of the Invention

[0006] In view of this, the present invention proposes an aerogel-reinforced vacuum glass and its preparation method, aiming to solve the problems of cumbersome process, high cost, inability to be cut, sealing aging, and inability to achieve large-scale production in the current technology of vacuum glass.

[0007] This invention proposes an aerogel-reinforced vacuum glass, which includes an upper glass substrate and a lower glass substrate arranged opposite each other, a vacuum glass bubble layer distributed between the two glass substrates, and a fusion structure for sealing the glass substrates and the vacuum glass bubble layer.

[0008] Furthermore, the upper glass substrate and the lower glass substrate are selected from one of the following: special glass, drawn flat glass, flat drawn flat glass, float glass, tempered glass, frosted glass, sandblasted glass, patterned glass, wired glass, laminated glass, and hot-bent glass.

[0009] Furthermore, the vacuum glass bubble layer is formed by high-temperature foaming of a particulate glass bubble source, wherein the particulate glass bubble source is silica aerogel micro-nano particles.

[0010] Furthermore, the fusion structure is that the lower side of the upper glass substrate is partially fused with the upper side of the lower glass substrate, and partially fused with the gap between the vacuum glass bubble layer.

[0011] Furthermore, it also includes a multi-layer stacked structure; the multi-layer stacked structure is formed by stacking at least two sets of aerogel-reinforced vacuum glass as described in any one of claims 1 to 4 through a repeated fusion process, and the distance between two adjacent sets of glass structures is 1 to 3 mm.

[0012] The method for preparing the aerogel-reinforced vacuum glass includes the following steps: S1. Pretreatment: Clean and dry the glass substrate, and dry the silica aerogel micro-nano particles to remove adsorbed moisture; S2. Particle Laying: The dried silica aerogel micro-nano particles are evenly laid on the surface of the lower glass substrate, covered with the upper glass substrate and aligned, with a fusion allowance reserved at the edges to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is subjected to high-temperature foaming, followed by heat preservation treatment, to obtain a foamed and fused glass assembly; S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0013] Furthermore, in step S1, the glass substrate is cleaned using an ultrasonic cleaning process, and the cleaning solution is a mixture of deionized water and ethanol at a volume ratio of 3:1, with a cleaning time of 15-20 minutes; the drying temperature is 100-120°C, and the time is 1-2 hours; the drying parameters are: temperature 70-90°C, time 1.5-2.5 hours.

[0014] Furthermore, the silica aerogel micro / nano particles described in step S2 have a concentration of 10~60 g / m³. 2 The density is uniformly laid; the fusion allowance is 2~4mm.

[0015] Furthermore, in step S3, the high-temperature foaming specifically involves: heating to 900-1000℃ at a rate of 4-7℃ / min, followed by heat preservation treatment; the heat preservation treatment is performed in an inert gas environment for 30-60 minutes, wherein the inert gas is nitrogen or argon, and the gas flow rate of the inert gas is 0.5-1m³. 3 / h.

[0016] Furthermore, when preparing a multi-layered aerogel-reinforced vacuum glass, after step S5, steps S1 to S4 are repeated to lay aerogel particles on the surface of the formed vacuum glass and cover it with a new glass substrate. High-temperature fusion and cooling are performed again, and the temperature of the two adjacent fusions is reduced by 50°C compared with the previous one, and the holding time is extended by 10 minutes.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention forms a sealed structure by partially fusing the upper and lower glass substrates (including fusing at the gaps between the vacuum glass bubble layers), eliminating the need for additional sealant, sealing components, or vacuum ports. This completely avoids the vacuum failure problems caused by sealant aging and port leakage in traditional vacuum glass. After climate cycle testing, the insulation coefficient change rate is small, the service life is significantly extended, and it is suitable for long-term outdoor or complex environment use, without the risk of powder shedding or coating peeling.

[0018] In this invention, the vacuum glass bubble layer is formed by high-temperature foaming of silica aerogel micro-nano particles. The aerogel itself has a high porosity of 80~99.8% and a low thermal conductivity of ≤0.012W / (m·K). Combined with the near-vacuum state inside the bubble, it can simultaneously block heat convection, heat conduction and radiative heat, and the overall energy-saving and sound insulation effect is better than that of traditional vacuum glass.

[0019] The preparation process does not require a complex vacuum system, coating equipment or custom molds. It forms a vacuum bubble layer through an integrated process of high-temperature foaming and natural cooling. The parameters of each step (heating rate, holding time, particle density, etc.) are clearly controllable. A single production line can achieve standardized mass production, and the production cost is lower than that of traditional low-emissivity vacuum glass, which solves the bottleneck of the popularization of traditional vacuum glass products due to their complex processes and high prices. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 These are the original silica aerogel particles dried in Example 1; Figure 2 The dried silica aerogel micron powder from Example 1; Figure 3 The image shows the silica aerogel from Example 1 as observed under a megahertz electron microscope. Figure 4 The distribution of vacuum bubbles under an electron microscope in the aerogel vacuum glass of Example 1; Figure 5 The aerogel-reinforced vacuum glass prepared in Example 1 is shown. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention. It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the present invention.

[0022] Furthermore, regarding the numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0023] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0024] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be apparent to those skilled in the art. This specification and embodiments are merely exemplary.

[0025] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0026] The present invention provides an aerogel-reinforced vacuum glass, the aerogel-reinforced vacuum glass comprising an upper glass substrate and a lower glass substrate disposed opposite to each other, a vacuum glass bubble layer distributed between the two glass substrates, and a fusion structure for sealing the glass substrates and the vacuum glass bubble layer.

[0027] The upper and lower glass substrates mentioned in this invention are selected from one of the following: special glass, drawn flat glass, flat drawn flat glass, float glass, tempered glass, frosted glass, sandblasted glass, patterned glass, wired glass, laminated glass, and hot-bent glass.

[0028] The vacuum glass bubble layer described in this invention is formed by high-temperature foaming of a particulate glass bubble source, wherein the particulate glass bubble source is silica aerogel micro-nano particles.

[0029] This invention adds a particulate glass bubble source to the vacuum glass. The particulate glass bubble source is silica aerogel micro-nano particles. Due to the addition of aerogel (which has good radiation protection function), it can also block the radiant heat from sunlight. Because of the vacuum bubble, sound cannot be conducted in a vacuum, so aerogel vacuum glass can block 90% of noise, achieving a very good sound insulation effect. It is a high-performance, lightweight, nanoporous amorphous solid material with a porosity of 80-99.8%, a typical pore size of 1-100 nanometers, a specific surface area of ​​400-1000 square meters / gram, and a density as low as 3 kg / m³ (only 3 times that of air). Its room temperature thermal conductivity can be as low as 0.012 W / (m·Calvin). Due to the unique nanoporous structure of aerogel, with pore sizes less than 50 nm and a high number of nanopores... Because each pore wall acts as a heat shield, an effect of nearly infinite number of heat shields is generated, minimizing thermal radiation. Simultaneously, heat is conducted along the pore walls within the aerogel material, with an infinite number of pore walls forming an infinitely long, loose path effect, reducing the solid's thermal conductivity to near its minimum limit. Since the free path of air molecules is around 100 nm, while the pore size of aerogel is less than 50 nm, the air molecules within the pores lose their ability to flow freely, existing in a near-vacuum state, unable to undergo thermal convection. Therefore, aerogel-reinforced vacuum glass can effectively solve the heat loss caused by convection, conduction, and radiation.

[0030] In this invention, the particulate glass bubble source is selected from aerogel micron particles produced by the China Academy of Space Technology.

[0031] The fusion structure described in this invention is a partial fusion of the lower side surface of the upper glass substrate and the upper side surface of the lower glass substrate, and a partial fusion at the gap between the vacuum glass bubble layer.

[0032] This invention forms a sealed structure by partially fusing the upper and lower glass substrates and fusing the gaps between the vacuum glass bubble layers. It eliminates the need for additional sealant, sealing components, or vacuum ports, completely avoiding the vacuum failure problems caused by sealant aging and port leakage in traditional vacuum glass. The service life is significantly extended, making it suitable for long-term outdoor or complex environments, and there are no hidden dangers such as powder shedding or coating peeling.

[0033] The present invention also includes a multi-layered structure of aerogel-reinforced vacuum glass; the multi-layered structure is formed by stacking at least two sets of aerogel-reinforced vacuum glass as described in any one of claims 1 to 4 through a repeated fusion process, and the spacing between two adjacent sets of glass structures is 1 to 3 mm.

[0034] A method for preparing aerogel-reinforced vacuum glass includes the following steps: S1. Pretreatment: Clean and dry the glass substrate, and dry the silica aerogel micro-nano particles to remove adsorbed moisture; S2. Particle Laying: The dried silica aerogel micro-nano particles are evenly laid on the surface of the lower glass substrate, covered with the upper glass substrate and aligned, with a fusion allowance reserved at the edges to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is subjected to high-temperature foaming, followed by heat preservation treatment, to obtain a foamed and fused glass assembly; S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0035] S1. Pretreatment: Clean and dry the glass substrate, and dry the silica aerogel micro-nano particles to remove adsorbed moisture; In step S1 of this invention, the glass substrate is cleaned using an ultrasonic cleaning process. The cleaning solution is a mixture of deionized water and ethanol at a volume ratio of 3:1. The cleaning time is preferably 15-20 min, more preferably 16-20 min. The drying parameters are preferably: temperature 100-120℃, time 1-2 h, more preferably temperature 110-120℃, time 1.5-2 h. The drying parameters are preferably: temperature 70-90℃, time 1.5-2.5 h, more preferably temperature 80-90℃, time 2-2.5 h.

[0036] S2. Particle Laying: The dried silica aerogel micro-nano particles are evenly laid on the surface of the lower glass substrate, covered with the upper glass substrate and aligned, with a fusion allowance reserved at the edges to obtain the assembled glass assembly. The silica aerogel micro / nano particles mentioned in step S2 of this invention are preferably in the form of 10~60 g / m³. 2 The density is uniformly laid, and more preferably 30~60g / m². 2 The density is uniformly laid; the fusion allowance is preferably 2~4mm, more preferably 2~3mm.

[0037] In this invention, the density of the silica aerogel is selected based on the synergy between its foaming stability and performance. Within this density range, the aerogel particles can carry sufficient air and expand uniformly at high temperatures of 900~1000℃ to form a vacuum bubble layer, avoiding insufficient foaming and uneven bubble structure due to excessively high density, or particle agglomeration and foam rupture due to excessively low density. Its low density characteristic corresponds to a high porosity of 80~99.8%, combined with a pore size of 1~50nm, realizing an infinite number of heat shields and a near-vacuum convection blocking effect, ensuring optimal heat insulation and radiation protection performance. Moreover, aerogel particles in this density range are easy to lay uniformly, and will not cause interlayer delamination due to density differences when fused with the glass substrate. Furthermore, the structure remains stable even after cutting and multi-layer stacking.

[0038] S3. High-temperature foaming and fusion: The assembled glass assembly is subjected to high-temperature foaming, followed by heat preservation treatment, to obtain a foamed and fused glass assembly; In step S3 of this invention, the high-temperature foaming is preferably performed by heating to 900-1000°C at a rate of 4-7°C / min, more preferably at a rate of 5-7°C / min to 950-1000°C, followed by heat preservation treatment; the heat preservation treatment is preferably performed in an inert gas environment for 30-60 min, more preferably in an inert gas environment for 40-60 min, wherein the inert gas is nitrogen or argon, and the gas flow rate of the inert gas is 0.5-1 m³ / min. 3 / h, further preferably 0.6~1m 3 / h.

[0039] In this invention, a particulate glass bubble source is uniformly sprayed between the upper and lower glass layers, and the temperature is raised to 900℃~1000℃. The air carried within the micron-sized aerogel particles expands dramatically at the high temperature, blowing bubbles out of the molten glass. When the heating is stopped and the temperature is gradually lowered until it reaches room temperature, the air bubbles in the glass are retained. The air density in the glass air bubbles drops to an extremely low level due to the significant temperature reduction, approaching a vacuum, forming a uniformly distributed layer of vacuum bubbles.

[0040] In this invention, when preparing a multi-layer stacked aerogel-reinforced vacuum glass, after step S5, steps S1 to S4 are repeated to lay aerogel particles on the surface of the formed vacuum glass and cover it with a new glass substrate. High-temperature fusion and cooling are performed again, and the temperature of the two adjacent fusions is reduced by 50°C compared with the previous one, and the heat preservation time is extended by 10 minutes.

[0041] In this invention, the multi-layered structure of the aerogel-reinforced vacuum glass achieves tight bonding between layers through repeated fusion processes. The optimized design of adjacent fusion temperatures and heat preservation times avoids interlayer delamination, improving wind pressure resistance and impact resistance compared to a single layer. Furthermore, the synergistic effect of the multi-layered vacuum glass bubbles reduces the heat transfer coefficient and significantly improves sound insulation and radiation protection. It is suitable for high-performance applications such as extremely cold regions and high-speed rail windows. The number of layers can also be adjusted according to requirements without the need for additional adaptation structures, accommodating both conventional and special scenarios. Moreover, the stacked glass retains its cuttable characteristics, ensuring unaffected flexibility in use.

[0042] This invention allows for the arbitrary cutting of glass according to actual usage requirements without disrupting the glass vacuum, and also enables the production of multi-layered glass stacks. The production process is simple and suitable for large-scale production.

[0043] In this invention, unless otherwise specified, all raw materials required for preparation are commercially available products well known to those skilled in the art.

[0044] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0045] The specific implementation method is as follows: Example 1 Raw materials: Cleaning solution prepared by mixing special glass, deionized water and ethanol in a volume ratio of 3:1.

[0046] Preparation method: S1. Pretreatment: The upper and lower special glass substrates are placed in the cleaning solution for ultrasonic cleaning for 16 minutes, and then dried at 110°C for 1.5 hours. The silica aerogel micro-nano particles are dried at 80°C to remove adsorbed moisture. S2. Particle Laying: The dried silica aerogel micro / nano particles are laid at a density of 30m. 2 The density is evenly spread on the surface of the lower glass substrate, the upper glass substrate is covered and aligned, and a fusion allowance of 2mm is reserved at the edge to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is heated to 950-1000℃ at a rate of 5-7℃ / min for high-temperature foaming, followed by nitrogen gas at a flow rate of 0.6m³ / min. 3 The glass assembly was subjected to heat preservation treatment for 40 minutes in an environment of / h to obtain the foamed and fused glass assembly. S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0047] Example 2 Raw materials: a cleaning solution prepared by mixing float glass, deionized water and ethanol in a volume ratio of 3:1.

[0048] Preparation method: S1. Pretreatment: The upper and lower float glass substrates were placed in a cleaning solution prepared by mixing deionized water and ethanol in a volume ratio of 3:1 and ultrasonically cleaned for 18 min. Then, they were dried at 115℃ for 1.8 h. The silica aerogel micro-nano particles were dried at 85℃ to remove adsorbed moisture. S2. Particle Laying: The dried silica aerogel micro / nano particles are laid at a density of 40m. 2 The density is evenly spread on the surface of the lower glass substrate, the upper glass substrate is covered and aligned, and a fusion allowance of 2.5mm is reserved at the edge to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is heated to 980°C at a rate of 6°C / min for high-temperature foaming, followed by argon gas flow rate of 0.8 m³ / min. 3 The glass assembly was subjected to heat preservation treatment for 50 minutes in an environment of / h to obtain the foamed and fused glass assembly. S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0049] Example 3 Raw materials: tempered glass, cleaning solution prepared by mixing deionized water and ethanol in a volume ratio of 3:1.

[0050] Preparation method: S1. Pretreatment: The upper and lower tempered glass substrates are placed in the cleaning solution for ultrasonic cleaning for 20 minutes, and then dried at 120°C for 2 hours. The silica aerogel micro-nano particles are dried at 90°C to remove adsorbed moisture. S2. Particle Laying: The dried silica aerogel micro / nano particles are laid at a density of 60m. 2 The density is evenly spread on the surface of the lower glass substrate, the upper glass substrate is covered and aligned, and a 3mm fusion allowance is reserved at the edge to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is heated to 1000°C at a rate of 7°C / min for high-temperature foaming, followed by argon gas flow rate of 1m³ / min. 3 The glass assembly was subjected to heat preservation treatment for 60 minutes in an environment of / h to obtain the foamed and fused glass assembly. S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0051] Example 4 Raw materials: Cleaning solution prepared by mixing frosted glass, deionized water and ethanol in a volume ratio of 3:1.

[0052] Preparation method: S1. Pretreatment: The upper and lower frosted glass substrates are placed in the cleaning solution for ultrasonic cleaning for 20 minutes, and then dried at 120°C for 2 hours. The silica aerogel micro-nano particles are dried at 90°C to remove adsorbed moisture. S2. Particle Laying: The dried silica aerogel micro / nano particles are laid at a density of 50m. 2 The density is evenly spread on the surface of the lower glass substrate, the upper glass substrate is covered and aligned, and a 3mm fusion allowance is reserved at the edge to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is heated to 1000°C at a rate of 7°C / min for high-temperature foaming, followed by argon gas flow rate of 1m³ / min. 3 The glass assembly was subjected to heat preservation treatment for 60 minutes in an environment of / h to obtain the foamed and fused glass assembly. S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

[0053] Comparative Example 1 Raw materials: float glass (thickness same as float glass in Example 2), low melting point glass powder sealant, metal microsphere support, low-emissivity (Low-E) coating solution, deionized water.

[0054] Preparation method: S1. Pretreatment: The upper and lower float glass substrates were ultrasonically cleaned with deionized water for 18 min and dried at 115℃ for 1.8 h; a Low-E film with a thickness of 8 nm was deposited on the inner surface of the upper glass substrate using magnetron sputtering. S2. Support installation: Lay the metal microsphere support at a density of 40 microspheres / cm². 2 The density is evenly distributed on the surface of the lower glass substrate to avoid glass adhesion.

[0055] S3. Sealing and Vacuuming: Apply low-melting-point glass powder sealant to the edges of the upper and lower glass substrates, align them, and place them in a curing oven at 380℃ for 60 minutes; connect to a vacuum unit through the reserved vacuum port and evacuate to a vacuum level >10. -1Pa, then seal the port with a sealing plug.

[0056] S4. Post-processing: Grind and trim the edges of the glass to obtain traditional low-emissivity vacuum glass.

[0057] Performance testing: (1) The thermal conductivity of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 was determined by the heat flow meter method. The ambient temperature was 25°C and the temperature difference was 10°C. The test was conducted according to GB / T 2680 "Test Method for Solar and Optical Performance of Building Glass".

[0058] (2) The sound insulation attenuation decibels of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 were tested in the frequency range of 100~1250Hz, and the average attenuation value was taken. The test was based on (GB / T 8485 "Classification and Test Method of Air Sound Insulation Performance of Building Exterior Windows").

[0059] (3) The vacuum degree of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 was directly measured by a vacuum gauge, and the test was based on (GB / T 30433 Vacuum Glass).

[0060] (4) The wind pressure resistance of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 is compared with the wind pressure resistance multiple of the insulating glass of the same thickness (5mm). The test is based on (GB / T 15763.2 Safety Glass for Building - Part 2: Tempered Glass).

[0061] (5) The climate cycle durability of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 was tested after 100 cycles of -30℃ (12h) to 80℃ (12h), and the change rate of the thermal insulation coefficient was tested. The test was based on the industry-standard accelerated aging test.

[0062] (6) The vacuum retention degree of the vacuum glass obtained in Examples 1-4 and Comparative Example 1 after cutting is determined by cutting the sample into 50cm×50cm pieces, letting it stand for 72h, and then testing the ratio of the vacuum degree to that before cutting. The test is based on (GB / T 30433 Vacuum Glass).

[0063] The performance test results of the vacuum glasses obtained in Examples 1-4 and Comparative Example 1 are shown in Table 1 below: Table 1. Performance test results of the vacuum glass obtained in Examples 1-4 and Comparative Example 1.

[0064] In summary, embodiments 1-4 of the present invention, due to the use of aerogel vacuum bubble layers, achieve a synergistic effect of heat insulation and radiation protection, resulting in a heat transfer coefficient of 0.92~0.98 W / m. 2• K, sound insulation attenuation is 31.2~32.0dB, compared to the conduction coefficient of 1.42W / m in Comparative Example 1. 2 The K value is reduced by more than 32.4%, which is more than 7.2% higher than the 27.1dB sound insulation attenuation of Comparative Example 1. The wind pressure resistance of Examples 1-4 is 2.0~2.1 and the climate cycle durability is 0.22~0.28%, which is 1.33 times that of Comparative Example 1 with a wind pressure resistance of 1.5. The change rate of the thermal insulation coefficient after climate cycle is only 43%~47% of that of Comparative Example 1 with a climate cycle durability of 0.51%. This proves that the glass itself is fused and sealed better than the traditional sealant sealant and has better durability. Comparative Example 1 has a vacuum retention rate of <5% after cutting and is completely ineffective, while Examples 1-4 have a vacuum retention rate of ≥98.5% after cutting, which perfectly meets the application requirements of arbitrary cutting and solves the limitation of customization of traditional vacuum glass.

[0065] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is determined by the appended claims.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An aerogel-reinforced vacuum glass, characterized in that, The aerogel-reinforced vacuum glass includes an upper glass substrate and a lower glass substrate arranged opposite each other, a vacuum glass bubble layer distributed between the two glass substrates, and a fusion structure for sealing the glass substrate and the vacuum glass bubble layer.

2. The aerogel-reinforced vacuum glass according to claim 1, characterized in that, The upper and lower glass substrates are selected from one of the following: special glass, drawn flat glass, flat-drawn flat glass, float glass, tempered glass, frosted glass, sandblasted glass, patterned glass, wired glass, laminated glass, and hot-bent glass.

3. The aerogel-reinforced vacuum glass according to claim 1, characterized in that, The vacuum glass bubble layer is formed by high-temperature foaming of a particulate glass bubble source, and the particulate glass bubble source is silica aerogel micro-nano particles.

4. The aerogel-reinforced vacuum glass according to claim 1, characterized in that, The fusion structure is a partial fusion of the lower side surface of the upper glass substrate and the upper side surface of the lower glass substrate, and a partial fusion at the gap between the vacuum glass bubble layer.

5. The aerogel-reinforced vacuum glass according to claim 1, characterized in that, It also includes a multi-layer stacked structure; the multi-layer stacked structure is formed by stacking at least two sets of aerogel-reinforced vacuum glass as described in any one of claims 1 to 4 through a repeated fusion process, and the spacing between two adjacent sets of glass structures is 1 to 3 mm.

6. A method for preparing aerogel-reinforced vacuum glass according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Pretreatment: Clean and dry the glass substrate, and dry the silica aerogel micro-nano particles to remove adsorbed moisture; S2. Particle Laying: The dried silica aerogel micro-nano particles are evenly laid on the surface of the lower glass substrate, covered with the upper glass substrate and aligned, with a fusion allowance reserved at the edges to obtain the assembled glass assembly. S3. High-temperature foaming and fusion: The assembled glass assembly is subjected to high-temperature foaming, followed by heat preservation treatment, to obtain a foamed and fused glass assembly; S4. Cooling into bubbles: Cool the foamed and fused glass assembly to room temperature to obtain the aerogel-reinforced vacuum glass; S5. Post-processing: Grind and trim the edges of the aerogel-reinforced vacuum glass, and cut it to any size as required.

7. The method for preparing an aerogel-reinforced vacuum glass according to claim 6, characterized in that, In step S1, the glass substrate is cleaned using an ultrasonic cleaning process. The cleaning solution is a mixture of deionized water and ethanol at a volume ratio of 3:1, and the cleaning time is 15-20 minutes. The drying temperature is 100-120°C, and the time is 1-2 hours. The drying parameters are: temperature 70-90°C, time 1.5-2.5 hours.

8. The method for preparing an aerogel-reinforced vacuum glass according to claim 6, characterized in that, The silica aerogel micro / nano particles described in step S2 have a concentration of 10~60 g / m³. 2 The density is uniformly laid; the fusion allowance is 2~4mm.

9. The method for preparing an aerogel-reinforced vacuum glass according to claim 6, characterized in that, In step S3, the high-temperature foaming specifically involves heating to 900-1000℃ at a rate of 4-7℃ / min, followed by heat preservation treatment. This heat preservation treatment is performed in an inert gas environment for 30-60 minutes. The inert gas is nitrogen or argon, and its flow rate is 0.5-1 m³ / min. 3 / h.

10. The method for preparing an aerogel-reinforced vacuum glass according to claim 6, characterized in that, When preparing a multi-layered aerogel-reinforced vacuum glass, after step S5, steps S1 to S4 are repeated to lay aerogel particles on the surface of the formed vacuum glass and cover it with a new glass substrate. High-temperature fusion and cooling are performed again, and the temperature of the two adjacent fusions is reduced by 50°C compared with the previous one, and the holding time is extended by 10 minutes.

Images