High-strength photoelectric glass and preparation method thereof

Abstract

The invention discloses high-strength photoelectric glass and a preparation method thereof, and relates to the field of photoelectric glass, and the high-strength photoelectric glass comprises the following components: 60-75% of silicon dioxide, 8-15% of aluminum oxide, 5-12% of boric oxide, 3-8% of potassium oxide, 1-5% of lithium oxide, 2-6% of titanium oxide, 0.5-2% of rare earth oxide, and 1-3% of a reinforced fiber material. Glass components are optimized, the strength and optical performance are remarkably improved, the proportion of basic components such as silicon dioxide and aluminum oxide is scientifically adjusted, and new components such as boron oxide, potassium oxide and lithium oxide are introduced to optimize a glass network structure; the rare earth oxide is added, and the special optical and physical properties of the rare earth oxide are utilized, so that the glass performance is further improved; a reinforced fiber material is added, reinforced fibers are tightly combined with a glass matrix, and a framework supporting effect is achieved. Through the synergistic effect of multiple components, the Vickers hardness of the high-strength photoelectric glass is increased to 600 HV or above, the light transmittance is larger than or equal to 90%, and the strength and the optical performance are remarkably improved.

Description

Technical Field

[0001] The present invention relates to photoelectric glass technology, in particular to high-strength photoelectric glass and a preparation method thereof. Background Art

[0002] With the rapid development of optoelectronic technology, optoelectronic glass has been widely used in display, lighting, new energy and other fields. In recent years, with the rise of emerging industries such as smart buildings, autonomous driving, and wearable devices, the application scenarios of optoelectronic glass have been further expanded, and higher requirements have been placed on its performance and quality. In the field of smart buildings, optoelectronic glass not only needs to have good light transmittance and heat insulation, but also needs to be deeply integrated with the building structure and withstand external forces such as wind pressure and earthquakes on the building's exterior walls; in self-driving cars, optoelectronic glass windows that integrate display, sensor and other functions need to meet lightweight requirements while having high strength performance to withstand stone impact during high-speed driving; in wearable devices, optoelectronic glass serves as a protective cover for display screens and sensors, requiring excellent strength and wear resistance in an extremely small size.

[0003] However, existing photovoltaic glass has certain shortcomings in terms of strength, making it difficult to meet the requirements of some application scenarios with high glass strength requirements, such as outdoor display screens and automotive window photovoltaic glass. Existing photovoltaic glass mostly adopts the traditional silicate glass system. When subjected to external force, the microcracks inside the glass can easily expand rapidly and cause rupture. In extreme temperature environments, ordinary photovoltaic glass will produce large thermal stresses due to the mismatch between the thermal expansion coefficient and the attached material, causing the glass to shatter. Especially in the field of outdoor display screens, where the temperature difference between day and night is large and the ultraviolet radiation is strong, existing photovoltaic glass is prone to yellowing and strength loss, which seriously affects the display effect and service life; in automotive window applications, existing photovoltaic glass is difficult to meet the dual requirements of lightweight and high strength at the same time, limiting the energy efficiency and safety improvement of the vehicle.

[0004] During use, existing photovoltaic glass is easily broken and damaged due to external impact, temperature changes and other factors, which not only affects its normal use, but also may bring safety hazards. At the same time, the existing photovoltaic glass preparation methods have problems such as complex process, high cost, and low production efficiency, which limit the large-scale production and application of photovoltaic glass. At present, in order to improve the performance of photovoltaic glass, some companies use multi-layer composite or surface strengthening processes, but these methods have problems such as cumbersome process steps, low yield rate, and large equipment investment, resulting in high production costs. In addition, it is difficult for traditional preparation processes to accurately control the internal component distribution and microstructure of the glass, resulting in poor product performance consistency and unable to meet the high-end market's requirements for product quality stability. Therefore, there is an urgent need to develop a photovoltaic glass with high strength, efficient preparation method and low cost to meet the ever-evolving market demand and technical challenges. Summary of the Invention

[0005] The object of the present invention is to provide high-strength photovoltaic glass and a preparation method thereof to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: high-strength photovoltaic glass, comprising the following components, by weight percentage: 60-75% silicon dioxide, 8-15% aluminum oxide, 5-12% boron oxide, 3-8% potassium oxide, 1-5% lithium oxide, 2-6% titanium oxide, 0.5-2% rare earth oxide, and 1-3% reinforcing fiber material.

[0007] Furthermore, the rare earth oxide is a mixture of cerium oxide and lanthanum oxide.

[0008] Furthermore, the reinforcing fiber material is a mixture of glass fiber and carbon fiber, and the length of the reinforcing fiber material is 0.5-2 mm.

[0009] Furthermore, the light transmittance of the high-strength photovoltaic glass is ≥90%, and the Vickers hardness is ≥600HV.

[0010] A method for preparing high-strength photovoltaic glass comprises the following steps:

[0011] Step 1: Weigh the weight of each raw material according to the weight percentage of each raw material, soak the reinforcing fiber material in a silane coupling agent solution with a mass fraction of 2-5%, soak it at 40-60°C for 1-2 hours, then take it out and dry it;

[0012] Step 2: weighing silicon dioxide, aluminum oxide, boron oxide, potassium oxide, lithium oxide, titanium oxide, and rare earth oxide into a mixing device, fully and evenly mixing the raw materials through the mixing device, and then adding the mixed raw materials into a melting device, which heats the raw materials to 1400-1600° C. to obtain molten glass liquid;

[0013] Step 3: adding reinforcing fiber material to the molten raw material in step 2, and uniformly mixing the added fiber material into the molten raw material;

[0014] Step 4: Put the glass liquid containing the reinforcing fiber material into a molding device for molding, and then anneal the molded glass to obtain high-strength photovoltaic glass;

[0015] Furthermore, the mixing equipment is a ball mill, and the raw materials are put into the ball mill and ground at a speed of 300-500 r / min for 2-4 hours.

[0016] Furthermore, the forming method is calendering forming.

[0017] Furthermore, the annealing treatment is performed at a temperature of 500-600° C. and for a time of 4-8 hours.

[0018] Furthermore, the melting equipment is an electric melting furnace, and the mixed raw materials are placed in the electric melting furnace, which heats the raw materials to 1400-1600°C and melts them for 3-5 hours. At the same time, argon is introduced during the melting process for stirring, and the argon flow rate is 5-10 L / min. After heating and melting, the treated reinforced fiber material is added to the electric melting furnace, and stirring is continued for 15-30 minutes at a stirring speed of 100-200 r / min.

[0019] Furthermore, before the glass liquid is formed, the glass liquid is subjected to an impurity removal treatment, wherein the impurity removal treatment comprises adding 0.1-0.3% sodium nitrate by weight of the glass liquid to the glass liquid, stirring for 10-20 minutes, and then standing for 1-2 hours.

[0020] Compared with the prior art, the high-strength photovoltaic glass and its preparation method provided by the present invention have the following beneficial effects:

[0021] (1) Optimize glass composition and significantly improve strength and optical properties. Traditional glass formulas have low aluminum oxide content and lack targeted design to improve strength, resulting in limited mechanical strength, Vickers hardness of only 400-500HV, and light transmittance of only 80-85%. Examples 1-3 scientifically adjust the ratio of basic components such as silicon dioxide and aluminum oxide, introduce new components such as boron oxide, potassium oxide, and lithium oxide to optimize the glass network structure; add rare earth oxides to further improve glass performance by utilizing their special optical and physical properties; add reinforcing fiber materials to closely combine the reinforcing fibers with the glass matrix to play a skeletal support role. The synergistic effect of multiple components increases the Vickers hardness of the high-strength optoelectronic glass of the embodiment to more than 600HV, and the light transmittance reaches ≥90%. The strength and optical properties are significantly improved, which can meet the stringent requirements of high-end fields for glass performance.

[0022] (2) Raising the melting temperature to 1400-1600°C allows the raw materials to fully react and mix evenly; adding sodium nitrate to remove impurities before forming effectively reduces internal defects in the glass; using advanced methods such as calendaring or float forming to obtain more uniform and smooth glass; and performing annealing at 500-600°C for 4-8 hours to fully eliminate internal stress in the glass. These improvements effectively ensure the quality and stability of the glass and significantly improve product quality.

[0023] (3) By optimizing the glass composition and improving the preparation process, not only are the performance indicators of the optoelectronic glass, such as strength and transmittance, comprehensively improved, but also the waste generated by glass quality problems is reduced, and production efficiency is improved. More reasonable process parameter settings avoid the waste of raw materials and repeated processing, reduce energy consumption and production costs, and enable this high-strength optoelectronic glass to meet the application needs of high-end fields such as outdoor display screens and automotive windows with a higher cost-effectiveness, with significant economic benefits and market competitiveness.

[0024] (4) By optimizing the composition and process, the high-strength photovoltaic glass has excellent environmental adaptability. The addition of a high proportion of aluminum oxide and reinforced fiber materials improves the impact resistance of the glass, making it less likely to break when hit by external forces; the rational regulation of the thermal expansion coefficient and sufficient annealing treatment enhance the thermal stability of the glass, which can effectively resist the impact of temperature changes. In addition, the introduction of rare earth oxides and nanoparticles improves the chemical stability of the glass, giving it better corrosion resistance. These characteristics make the high-strength photovoltaic glass of the embodiment not only suitable for conventional scenarios, but also widely used in harsh environments such as high altitude, extreme cold, strong wind and sand, such as observation windows of polar research stations, cover plates of desert photovoltaic power stations, etc., which significantly broadens the application scenario boundaries of photovoltaic glass and provides strong support for technological upgrades in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 The flowchart of the preparation method of the high-strength photovoltaic glass of the present invention is shown in FIG. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Raw material ratio: by weight percentage, weigh 65% silicon dioxide, 10% aluminum oxide, 8% boron oxide, 5% potassium oxide, 3% lithium oxide, 4% titanium oxide, 1% cerium oxide, and 2% glass fiber.

[0030] Preparation process: Put silicon dioxide, aluminum oxide, boron oxide, potassium oxide, lithium oxide, titanium oxide and cerium oxide into a ball mill, grind at a speed of 400r / min for 3 hours, and mix them evenly; put the mixed raw materials into a furnace, melt them at 1500℃ to obtain glass liquid; add glass fiber to the glass liquid and stir it evenly; add sodium nitrate accounting for 0.2% of the weight of the glass liquid to the glass liquid, stir for 15 minutes, and then let it stand for 1.5 hours to remove impurities; use calendering to shape the glass liquid containing reinforced fiber material; anneal the molded glass at 550℃ for 6 hours to obtain high-strength photovoltaic glass.

[0031] Performance test: After testing, the light transmittance of this high-strength photoelectric glass is 92% and the Vickers hardness is 650HV.

[0032] Example 2

[0033] Raw material ratio: by weight percentage, weigh 70% silicon dioxide, 8% aluminum oxide, 10% boron oxide, 4% potassium oxide, 2% lithium oxide, 3% titanium oxide, 1.5% lanthanum oxide, and 1.5% carbon fiber.

[0034] Preparation process: Grind silica, aluminum oxide, boron oxide, potassium oxide, lithium oxide, titanium oxide, and lanthanum oxide in a ball mill at a speed of 350 r / min for 3.5 hours and mix thoroughly; melt the mixed raw materials into glass liquid at a high temperature of 1550°C; add carbon fiber to the glass liquid and stir evenly; add sodium nitrate accounting for 0.1% of the weight of the glass liquid to the glass liquid, stir for 10 minutes, and then let it stand for 1 hour to remove impurities; use float molding to shape the glass liquid; anneal the formed glass at 580°C for 5 hours to obtain high-strength photovoltaic glass.

[0035] Performance test: After testing, the light transmittance of this high-strength photoelectric glass is 91% and the Vickers hardness is 630HV.

[0036] Example 3

[0037] Raw material ratio: by weight percentage, weigh 68% silicon dioxide, 12% aluminum oxide, 6% boron oxide, 6% potassium oxide, 4% lithium oxide, 5% titanium oxide, 1.5% mixture of cerium oxide and lanthanum oxide (mass ratio 1:1), and 1.5% mixture of glass fiber and carbon fiber (mass ratio 1:1).

[0038] Preparation process: Grind a mixture of silica, aluminum oxide, boron oxide, potassium oxide, lithium oxide, titanium oxide, cerium oxide and lanthanum oxide in a ball mill at a speed of 500 r / min for 2 hours to mix evenly; melt the raw materials into glass liquid at 1450°C; add a mixture of glass fiber and carbon fiber to the glass liquid and stir evenly; add sodium nitrate accounting for 0.3% of the weight of the glass liquid to the glass liquid, stir for 20 minutes and then let it stand for 2 hours to remove impurities; shape the glass liquid by calendering; anneal the formed glass at 520°C for 8 hours to obtain high-strength photovoltaic glass.

[0039] Performance test: After testing, the light transmittance of this high-strength photoelectric glass is 93% and the Vickers hardness is 660HV.

[0040] Control Example

[0041] At present, the preparation of traditional high-strength photovoltaic glass mostly adopts conventional glass formula. Its main components are 70-80% silicon dioxide, 3-6% aluminum oxide, 5-10% sodium oxide, and 5-8% calcium oxide by weight. Some will add a small amount of titanium oxide (1-2%) to improve optical properties, but the overall composition lacks targeted design to enhance strength. Due to the low aluminum oxide content and the lack of the introduction of reinforcing fiber materials and specific rare earth oxides, the mechanical strength of the glass is limited. According to tests, the Vickers hardness of this type of glass is usually between 400-500HV. When subjected to large external force impact or drastic temperature changes, it is very easy to break, and cannot meet the use requirements of outdoor display screens, car windows and other scenes with high strength requirements.

[0042] In terms of preparation technology, the existing method is usually to simply mix the raw materials and then melt them at a temperature of 1300-1400°C. This temperature is relatively low, and it is difficult for the raw materials to fully react and mix evenly, which affects the quality of the glass. The molten glass liquid is directly formed by ordinary pressing or blowing without impurity removal and scientific annealing process, resulting in the presence of many bubbles, impurities and internal stresses inside the glass. After molding, it is generally only subjected to a short annealing treatment (2-3h) at 400-450°C, which makes it difficult to effectively eliminate internal stress. The transmittance of the photovoltaic glass produced by this preparation method is generally around 80-85%. Not only is the production efficiency low, but the scrap rate is also high, and the production cost remains high, which seriously limits the application of photovoltaic glass in large-scale production and high-end fields.

[0043] The effects of Examples 1 to 3 based on high-strength photovoltaic glass and a control example of the preparation method thereof were compared to obtain the following table:

[0044]

[0045]

[0046] As can be seen from the above table, Examples 1 to 3 have many beneficial effects compared to the control example:

[0047] The technical content of the embodiment is that in terms of glass composition, the strength and optical properties of the glass are enhanced by scientifically adjusting the proportions of multiple components and introducing new substances; in terms of preparation process, the melting temperature is increased to promote the full reaction of raw materials, and the impurity removal step is added to improve the purity of the glass. Advanced molding methods and more reasonable annealing treatments are used to optimize the glass structure and eliminate internal stress. Compared with the control example, these improvements comprehensively improve the quality of optoelectronic glass, increase production efficiency, reduce costs, and effectively meet the demand for high-strength optoelectronic glass in high-end fields such as outdoor display screens and automobile windows.

[0048] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. High-strength photoelectric glass, characterized by: Calculated by weight, the invention comprises the following components: 60-75% silicon dioxide, 8-15% aluminum oxide, 5-12% boron oxide, 3-8% potassium oxide, 1-5% lithium oxide, 2-6% titanium oxide, 0.5-2% rare earth oxide, and 1-3% reinforcing fiber material.

2. The high-strength photovoltaic glass and the preparation method thereof according to claim 1, characterized in that: The rare earth oxide is a mixture of cerium oxide and lanthanum oxide.

3. The high-strength photovoltaic glass and the preparation method thereof according to claim 1, characterized in that: The reinforcing fiber material is a mixture of glass fiber and carbon fiber, and the length of the reinforcing fiber material is 0.5-2 mm.

4. The high-strength photovoltaic glass and the preparation method thereof according to claim 1, characterized in that: The light transmittance of the high-strength photoelectric glass is ≥90%, and the Vickers hardness is ≥600HV.

5. The method for preparing high-strength photovoltaic glass according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Weigh the weight of each raw material according to the weight percentage of each raw material, soak the reinforcing fiber material in a silane coupling agent solution with a mass fraction of 2-5%, soak it at 40-60°C for 1-2 hours, then take it out and dry it; Step 2: weighing silicon dioxide, aluminum oxide, boron oxide, potassium oxide, lithium oxide, titanium oxide, and rare earth oxide into a mixing device, fully and evenly mixing the raw materials through the mixing device, and then adding the mixed raw materials into a melting device, which heats the raw materials to 1400-1600° C. to obtain molten glass liquid; Step 3: adding reinforcing fiber material to the molten raw material in step 2, and uniformly mixing the added fiber material into the molten raw material; Step 4: The glass liquid containing the reinforcing fiber material is placed into a molding device for molding, and then the molded glass is annealed to obtain high-strength photovoltaic glass.

6. The method for preparing high-strength photovoltaic glass according to claim 5, characterized in that: The mixing device is a ball mill, and the raw materials are put into the ball mill and ground at a speed of 300-500 r / min for 2-4 hours.

7. The method for preparing high-strength photovoltaic glass according to claim 5, characterized in that: The forming method is calendering.

8. The method for preparing high-strength photovoltaic glass according to claim 5, characterized in that: The annealing treatment is performed at a temperature of 500-600° C. and for a time of 4-8 hours.

9. The method for preparing high-strength photovoltaic glass according to claim 5, characterized in that: The melting equipment is an electric melting furnace. The mixed raw materials are placed in the electric melting furnace, which heats the raw materials to 1400-1600°C and melts them for 3-5 hours. At the same time, argon is introduced for stirring during the melting process. The argon flow rate is 5-10L / min. After heating and melting, the treated reinforced fiber material is added to the electric melting furnace and stirred for 15-30 minutes at a stirring speed of 100-200r / min.

10. The method for preparing high-strength photovoltaic glass according to claim 5, characterized in that: Before the glass liquid is formed, the glass liquid is subjected to impurity removal treatment, wherein the impurity removal treatment comprises adding sodium nitrate accounting for 0.1-0.3% of the weight of the glass liquid to the glass liquid, stirring for 10-20 minutes and then standing for 1-2 hours.

Images