Photovoltaic glass clarifying agent and application
Through the photovoltaic glass clarifier and electromagnetic field treatment technology composed of As2O3, Sb2O3 and SnO2, the problem of insufficient selectivity and high treatment cost of photovoltaic glass clarifier in the existing technology is solved, and the impurity iron removal is achieved and the transmission of photovoltaic glass is improved. Lightness and mechanical properties ensure high efficiency and durability of the product.
Patent Information
- Application Number
- CN202411404433.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2024-12-10
AI Technical Summary
The existing photovoltaic glass clarifiers are insufficient in removing impurities, have high treatment costs and have a great environmental impact, especially the removal effect of iron elements is unstable, affecting the transmittance of photovoltaic glass.
The photovoltaic glass clarifier composed of As2O3, Sb2O3 and SnO2 is used to convert divalent iron into trivalent iron through synergistic action, reducing the influence of impurity iron on the transmittance of photovoltaic glass, and removing iron filings in broken glass through electromagnetic field treatment. Improve raw material quality and production efficiency.
It effectively improves the light transmittance and mechanical properties of photovoltaic glass, reduces production costs, ensures high efficiency and durability of the product, and avoids negative impacts on other beneficial elements.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of photovoltaic glass preparation, and in particular to a photovoltaic glass clarifier and its application. Background Art
[0002] As the global demand for clean energy continues to grow, solar power generation, as a sustainable way to obtain energy, has attracted more and more attention. Photovoltaic glass is a special glass used for photovoltaic modules. It has attracted much attention in recent years. Photovoltaic glass can be used in solar smart windows, solar pavilions, photovoltaic glass building roofs, photovoltaic glass curtain walls and other fields. In addition, photovoltaic glass can also be used in the transportation field, such as U-shaped power generation glass tunnel entrances, U-shaped power generation glass noise barriers, etc. At the same time, it can also be used in smart phones, electronic spreadsheets, watch screens and other fields to provide energy support for these products.
[0003] Transmittance is an important indicator to measure the performance of photovoltaic glass, which directly affects the photovoltaic solar energy conversion efficiency. Coloring elements such as titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, and cerium are the key factors affecting the transmittance of photovoltaic glass, and iron is the most common and highest content impurity element in raw materials. In addition, in the process of crushing broken glass, the crushing equipment will also introduce iron elements, which will also reduce the transmittance of photovoltaic glass.
[0004] There are some photovoltaic glass clarifiers on the market, which mainly remove impurity elements through chemical reactions or physical adsorption, but these existing technologies still have defects such as insufficient selectivity, high processing costs, environmental impact and unstable effects. For example, many clarifiers may have a negative impact on other beneficial elements while removing iron, increasing production costs and potentially generating hazardous waste. Summary of the invention
[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the present application includes providing a photovoltaic glass clarifier and application, which can convert divalent iron into trivalent iron as much as possible while taking into account the clarification effect, so as to reduce the impact of impure iron on the transmittance of photovoltaic glass.
[0006] In a first aspect, an embodiment of the present application provides a photovoltaic glass clarifier composed of As2O3, Sb2O3 and SnO2, wherein the mass ratio of As2O3, Sb2O3 and SnO2 is (0.2-0.5):(0.4-0.8):1.
[0007] The photovoltaic glass clarifier provided in the present application has excellent clarification and oxidation capabilities through the synergistic effect of As2O3, Sb2O3 and SnO2, and can effectively convert divalent iron into trivalent iron, thereby reducing the impact of impure iron on the transmittance of photovoltaic glass. Moreover, by controlling the mass ratio of As2O3, Sb2O3 and SnO2 within the range of (0.2-0.5:0.4-0.8:1), the clarifier can have sufficient oxidation effect while having a clarification effect, further removing impure iron, thereby achieving an overall improvement in performance.
[0008] In some embodiments of the present application, the mass ratio of As2O3, Sb2O3 and SnO2 is (xx):(0.3-0.4):(0.5-0.7):1.
[0009] The clarifier is based on the mass of SnO2. By rationally configuring the ratio of As2O3 and Sb2O3 within the above range, it can more effectively balance the oxidation ability and the clarification ability, so that the optical properties of the final product are not affected.
[0010] In some embodiments of the present application, the mass ratio of the photovoltaic glass clarifier to the glass batch material when used for glass clarification is (0.0015-0.0035):1.
[0011] Controlling the mass ratio of the clarifier to the glass batch material within the range of (0.0015-0.0035):1 can effectively improve the production efficiency of photovoltaic glass and the quality of the final product.
[0012] In some embodiments of the present application, the mass ratio of the photovoltaic glass clarifier to the glass batch material when used for glass clarification is (0.0020-0.0030):1.
[0013] In a second aspect, an embodiment of the present application provides an application of a photovoltaic glass clarifier in the preparation of photovoltaic glass.
[0014] In some embodiments of the present application, the preparation of photovoltaic glass includes the following steps: mixing the glass batch material and the photovoltaic glass clarifier in a mass ratio of 1: (0.0015-0.0035) evenly, sending them into an apparatus for melting, and preparing photovoltaic glass products by calendering.
[0015] In some embodiments of the present application, the preparation of the glass batch includes: mixing the recycled cullet with raw materials in proportion to obtain the glass batch.
[0016] In some embodiments of the present application, the cullet needs to be subjected to electromagnetic field treatment before being mixed with the raw materials to remove iron filings mixed in the cullet.
[0017] The application of electromagnetic field treatment in the preparation of photovoltaic glass can effectively remove metal impurities in broken glass, such as iron filings; improve the quality of raw materials, promote the stability of the melting and molding processes, and reduce their impact on the transmittance of photovoltaic glass, thereby improving the performance and quality of the final photovoltaic glass.
[0018] In some embodiments of the present application, the voltage applied by the electromagnetic field is 220V; the current is 1.8-2.8A; and the frequency is 30-45Hz.
[0019] Controlling the parameters of electromagnetic field treatment within the above range can effectively improve the efficiency of impurity removal, make the production process safer and more stable, and at the same time optimize energy use, reduce production costs, and improve the final quality of photovoltaic glass.
[0020] In some embodiments of the present application, the final photovoltaic glass product has a light transmittance of 92.5%-97%; a compressive strength of 100-200 MPa; a tensile strength of 40-100 MPa; and a flexural strength of 50-200 MPa.
[0021] By using the clarifier provided in the present application, the light transmittance of the photovoltaic glass can be effectively improved while the mechanical properties of the photovoltaic glass will not be affected. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.
[0023] A photovoltaic glass clarifier and its application according to an embodiment of the present application are described in detail below.
[0024] The present application embodiment provides a photovoltaic glass clarifier, which is composed of As2O3, Sb2O3 and SnO2, and its preparation includes the following steps:
[0025] As2O3, Sb2O3 and SnO2 are uniformly mixed in a mass ratio of (0.2-0.5):(0.4-0.8):1 to obtain the above-mentioned photovoltaic glass clarifier.
[0026] The clarifier achieves a good balance between oxidizing and clarifying abilities by combining different ingredients, such as arsenic oxide (As2O3), antimony oxide (Sb2O3) and tin oxide (SnO2). As a strong oxidant, arsenic oxide can effectively oxidize divalent iron (Fe2+) to trivalent iron (Fe3+). The solubility of trivalent iron in molten glass is low, which can reduce its content in the final product, thereby reducing the negative impact on the transmittance of photovoltaic glass. However, the use of arsenic oxide alone may not be enough to provide a good clarification effect. Antimony oxide (Sb2O3) and tin oxide (SnO2) have good clarification abilities. Tin oxide can not only help remove bubbles that may exist in the molten glass, but also form a uniform glass matrix in the molten state, thereby improving the overall optical properties. Antimony oxide can enhance the surface quality of the glass and further improve the clarification effect. Therefore, the present application can quickly convert divalent iron into trivalent iron during the melting process through the synergistic effect of As2O3, Sb2O3 and SnO2, thereby effectively reducing impurity iron and preventing it from forming a color tone that affects the transmittance in the photovoltaic glass; it can also remove bubbles and other impurities, so that the photovoltaic glass can maintain a good clarification effect during the melting and molding process. Moreover, the clarifier components in the present application are mixed according to a specific mass ratio (the ratio of As2O3, Sb2O3 and SnO2), so that it can be flexibly adjusted according to production needs; so that the clarifier has a clarification effect while also maximizing the oxidation effect, further removing impurity iron.
[0027] In the embodiments of the present application, the mass ratio of As2O3, Sb2O3 and SnO2 includes but is not limited to 0.2:0.4:1, 0.2:0.5:1, 0.2:0.6:1, 0.2:0.7:1, 0.2:0.8:1, 0.3:0.4:1, 0.3:0.5:1, 0.3:0.6:1, 0.3:0.7:1, 0.3:0.8:1, 0.4:0.4:1, 0.4:0.5:1, 0.4:0.6:1, 0.4:0.7:1, 0.4:0.8:1, 0.5:0.4:1, 0.5:0.5:1, 0.5:0.6:1, 0.5:0.7:1, and 0.5:0.8:1.
[0028] The generation of bubbles is often caused by the release of impurities and gases during the melting process. The addition of tin oxide can effectively reduce the probability of bubble formation, allowing the clarifier to maintain good clarification performance while improving the oxidation ability. Arsenic oxide has a strong oxidation ability and can effectively convert divalent iron into trivalent iron, thereby reducing the negative impact on the transmittance of photovoltaic glass. The addition of tin oxide and antimony oxide enhances the clarification ability of the mixed clarifier. While improving the clarification effect, tin oxide can effectively reduce the generation of bubbles, so that the optical properties of photovoltaic glass are not damaged.
[0029] The clarifier provided in this application is based on the mass of SnO2. By reasonably configuring the ratio of As2O3 and Sb2O3 within the above range, the oxidizing ability and clarification ability can be effectively balanced, so that the optical properties of the final product are not affected. The appropriate addition of As2O3 enhances the oxidizing ability of divalent iron, promotes its conversion into trivalent iron, and reduces the negative impact of impurity iron on transmittance. The appropriate amount of SnO2 and Sb2O3 can effectively prevent the formation of bubbles in the molten glass, so that the clarifier maintains good clarity while improving the oxidizing ability. By controlling As2O3, Sb2O3 and SnO2 within the above ratio range, it can be flexibly adjusted according to different production needs, adapted to various raw material characteristics, and improve the stability of the production process.
[0030] In the embodiment of the present application, the mass ratio of the photovoltaic glass clarifier to the glass batch material when used for glass clarification is (0.0015-0.0035): 1. The mass ratio of the photovoltaic glass clarifier to the glass batch material when used for glass clarification includes but is not limited to 0.0015: 1, 0.0018: 1, 0.002: 1, 0.0022: 1, 0.0024: 1, 0.0030: 1, 0.0032: 1, 0.0035: 1.
[0031] Controlling the mass ratio of clarifier to glass batch material within the range of (0.0015-0.0035):1 can enable the clarifier to play the best clarification and oxidation role in the glass melting process, without causing negative effects due to excessive dosage, and fully exert its performance. Controlling the amount of clarifier within the above mass ratio range can effectively prevent the formation of bubbles in the molten glass and improve the optical quality and transparency of the product. It also helps to maintain the stability of the production process and reduce performance fluctuations caused by excessive or insufficient clarifiers. Further improve the transmittance and overall performance of photovoltaic glass to meet industry standards.
[0032] The photovoltaic glass clarifier provided in the present application is used to prepare photovoltaic glass, and the preparation of photovoltaic glass includes the following steps:
[0033] (1) Preparation of glass mixture
[0034] The recycled cullet is mixed with raw materials in proportion to obtain glass batch. Before mixing with the raw materials, the cullet needs to be treated with an electromagnetic field to remove iron filings mixed in the cullet.
[0035] Electromagnetic field treatment can effectively remove metal impurities such as iron filings mixed in the cullet, reduce their impact on the transmittance of photovoltaic glass, and thus improve the optical performance of the final product. By removing impurities, electromagnetic field treatment improves the purity of the cullet, making the subsequent glass mixture more uniform, which helps to improve the efficiency of the melting and molding process. The reduction of impurities helps to form a more uniform glass liquid during the melting process, thereby obtaining a flatter and smoother glass surface when the calendering method is used. By removing metal impurities, electromagnetic field treatment can reduce the formation of bubbles in the molten glass and improve the transparency and overall quality of photovoltaic glass. The treated raw materials are more stable during the melting process, which helps to maintain the temperature and pressure conditions of the furnace and improve production consistency.
[0036] The principle of electromagnetic field treatment is mainly based on the effect of electromagnetic force on metal particles. When the applied voltage is 220V, the current is 1.8-2.8A, and the frequency is 30-45Hz, the electromagnetic field will generate an alternating electromagnetic force field, causing metal impurities (such as iron filings) to move under the action of the electromagnetic field. Due to their good magnetic conductivity, metal impurities such as iron filings will be affected by the magnetic field force under the action of the electromagnetic field and move in a specific direction, thereby separating from non-magnetic materials (such as glass). By adjusting the voltage, current and frequency, the intensity and range of the electromagnetic field can be optimized to achieve the best removal effect. Moreover, electromagnetic field treatment is not destructive to the glass itself, and can effectively remove impurities without affecting the properties of the glass material.
[0037] In the present application, the voltage applied by the electromagnetic field is 220V; the current is 1.8-2.8A; and the frequency is 30-45Hz.
[0038] This voltage and current range can effectively generate a sufficiently strong electromagnetic field to promote the effective separation of metal impurities (such as iron filings) and achieve the best removal rate. Controlling the electromagnetic field parameters within the above range can improve the safety of the operation process. Within this parameter range, the energy consumption of electromagnetic field treatment is low, which helps to reduce production costs and improve economic benefits. Moreover, the frequency and current within this range can adapt to various types of broken glass, and can achieve effective treatment under different raw material conditions, enhancing the flexibility of the process.
[0039] In addition, controlling within the appropriate voltage and current range helps prevent material deterioration or damage due to overheating during the process and protects the physical and chemical properties of the raw materials. This parameter range ensures the uniformity of the electromagnetic field, making the entire process more consistent, thereby improving the quality and performance of the final glass. Reasonable parameter settings make the electromagnetic field treatment process more stable, reduce the uncertainty caused by parameter fluctuations, and improve the controllability of the production process.
[0040] (2) Mixing and molding
[0041] The glass batch material in step (1) is mixed evenly with the above-mentioned photovoltaic glass clarifier in a mass ratio of 1:(0.0015-0.0025), and then sent into an apparatus (such as a melting furnace) to melt under high temperature conditions to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0042] The photovoltaic glass prepared using the clarifier provided in this application has a light transmittance of 92.5%-97%, indicating that the photovoltaic glass has a high light transmittance, can effectively capture sunlight, and improve the energy conversion efficiency of photovoltaic modules. Its compressive strength is 100-200MPa, so the photovoltaic glass also has good tolerance when subjected to external pressure, improving its safety and reliability in use under various environmental conditions. Its tensile strength is 40-100MPa, showing that the photovoltaic glass still maintains good stability when subjected to tension, can effectively resist external tensile stress, and enhance its durability in practical applications. Its flexural strength is 50-200MPa, indicating that the photovoltaic glass can withstand large bending stress, and is suitable for use in a variety of application scenarios such as construction and transportation, reducing the risk of damage caused by external forces.
[0043] In summary, the photovoltaic glass produced using the clarifier provided in this application has excellent performance in terms of light transmittance and mechanical strength, and has high efficiency, durability and wide application potential.
[0044] The features and performance of the present application are further described in detail below in conjunction with the embodiments.
[0045] Example 1
[0046] This embodiment provides a photovoltaic glass, which is prepared using the photovoltaic glass clarifier provided in this application, including the following steps:
[0047] (1) Preparation of clarifier
[0048] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.2:0.8:1; the mass of each component is: As2O3 0.216kg, Sb2O3 0.864kg and SnO2 1.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0049] (2) Preparation of glass mixture
[0050] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0051] (3) Mixing and molding
[0052] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0053] Example 2
[0054] This embodiment provides a photovoltaic glass, and its preparation method is basically the same as that of Embodiment 1, except that the ratio of the photovoltaic glass clarifier is different.
[0055] (1) Preparation of clarifier
[0056] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.26:0.74:1; the mass of each component is: As2O3 0.285kg, Sb2O3 0.795kg and SnO21.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0057] (2) Preparation of glass mixture
[0058] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0059] (3) Mixing and molding
[0060] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0061] Example 3
[0062] This embodiment provides a photovoltaic glass, and its preparation method is basically the same as that of Embodiment 1, except that the ratio of the photovoltaic glass clarifier is different.
[0063] (1) Preparation of clarifier
[0064] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.28:0.72:1; the mass of each component is: As2O3 0.298kg, Sb2O3 0.792kg and SnO21.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0065] (2) Preparation of glass mixture
[0066] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0067] (3) Mixing and molding
[0068] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0069] Example 4
[0070] This embodiment provides a photovoltaic glass, and its preparation method is basically the same as that of Embodiment 1, except that the ratio of the photovoltaic glass clarifier is different.
[0071] (1) Preparation of clarifier
[0072] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.47:0.53:1; the mass of each component is: As2O3 0.51kg, Sb2O3 0.57kg and SnO2 1.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0073] (2) Preparation of glass mixture
[0074] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0075] (3) Mixing and molding
[0076] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0077] Example 5
[0078] This embodiment provides a photovoltaic glass, and its preparation method is basically the same as that of Embodiment 1, except that the ratio of the photovoltaic glass clarifier is different.
[0079] (1) Preparation of clarifier
[0080] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.45:0.55:1; the mass of each component is: As2O3 0.486kg, Sb2O3 0.594kg and SnO21.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0081] (2) Preparation of glass mixture
[0082] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0083] (3) Mixing and molding
[0084] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0085] Example 6
[0086] This embodiment provides a photovoltaic glass, and its preparation method is basically the same as that of Embodiment 1, except that the ratio of the photovoltaic glass clarifier is different.
[0087] (1) Preparation of clarifier
[0088] As2O3, Sb2O3 and SnO2 are used in a mass ratio of As2O3:Sb2O3:SnO2=0.5:0.5:1; the mass of each component is: As2O3 0.54kg, Sb2O3 0.54kg and SnO2 1.08kg, a total of 2.16kg, and the components are stirred and mixed evenly to obtain a clarifier.
[0089] (2) Preparation of glass mixture
[0090] With 720kg of material per batch, the contents of each component are: SiO2 489.6kg, Al2O3 14.4kg, Na2O72kg, K2O55.44kg, CaO 57.6kg, MgO 28.8kg; use an electromagnetic field to remove iron filings from broken glass: set the voltage to 220V, the current to 2A, and the frequency to 40Hz, apply an electromagnetic field, and pass the broken glass through the electromagnetic field at a constant speed.
[0091] (3) Mixing and molding
[0092] The photovoltaic glass clarifier in step (1) and the glass batch material in step (2) are mixed evenly in a mass ratio of 0.0030:1, and then sent into a melting furnace to melt at 1360° C. to form a uniform glass liquid; then the photovoltaic glass product is prepared by a calendering method. After calendering, the glass plate enters an annealing furnace and is gradually cooled to room temperature to eliminate internal stress.
[0093] Comparative Example 1
[0094] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and a single component SnO2 2.16 kg is used as the clarifier.
[0095] Comparative Example 2
[0096] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and a single component Sb2O3 2.16 kg is used as the clarifier.
[0097] Comparative Example 3
[0098] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and a single component As2O3 2.16 kg is used as the clarifier.
[0099] Comparative Example 4
[0100] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and two components of As2O3 and Sb2O3 are used as the clarifier.
[0101] Comparative Example 5
[0102] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and a two-component Sb2O3 and SnO2 are used as the clarifier.
[0103] Comparative Example 6
[0104] This comparative example provides a photovoltaic glass, and its preparation method is basically the same as that of Example 4, except that the components and proportions of the photovoltaic glass clarifier are different, and two-component As2O3 and SnO2 are used as the clarifier.
[0105] Please see Table 1 for detailed parameters of the above embodiments and comparative examples.
[0106] Table 1
[0107]
[0108]
[0109] It can be seen from Table 2 that the transmittance of the photovoltaic glass produced by using the photovoltaic glass clarifier provided in this application is significantly increased, which can effectively improve the effect of impure iron in the photovoltaic glass on its chromaticity.
[0110] Experimental Example 1
[0111] In this experimental example, the transmittance of the photovoltaic glass obtained in the embodiment and the comparative example, and the photovoltaic glass obtained by using the commonly used clarifier NaCl in the market, group number 1#, was measured (the thickness of each glass sample was 2.5 mm). The transmittance measurement results of the above glass samples are shown in Table 2.
[0112] Table 2
[0113]
[0114] Experimental Example 2
[0115] In this experimental example, mechanical strength tests were performed on the photovoltaic glass products provided in Examples 1-10 of the present application and the commonly used clarifier 1# on the market in Experimental Example 1, including compressive strength, tensile strength and flexural strength. The tests were performed according to the method specified in GB / T 37781 to evaluate the mechanical properties and durability of the photovoltaic glass; the test results are shown in Table 3.
[0116] Table 3
[0117]
[0118] It can be seen from the data in Table 3 that the compressive strength, tensile strength and flexural strength of the photovoltaic glass prepared using the clarifier provided in the present application are all better than those of 1#.
[0119] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
Claims
1. A photovoltaic glass clarifier, characterized in that: It is composed of As2O3, Sb2O3 and SnO2, wherein the mass ratio of As2O3, Sb2O3 and SnO2 is (0.2-0.5):(0.4-0.8):
1.
2. The photovoltaic glass clarifier according to claim 1, characterized in that: The mass ratio of As2O3, Sb2O3 and SnO2 is (0.3-0.4):(0.5-0.7):
1.
3. The photovoltaic glass clarifier according to claim 1 or 2, characterized in that: When the photovoltaic glass clarifier is used for glass clarification, the mass ratio of the photovoltaic glass clarifier to the glass batch material is (0.0015-0.0035):
1.
4. The photovoltaic glass clarifier according to claim 3, characterized in that: The mass ratio of the photovoltaic glass clarifier to the glass batch material when used for glass clarification is (0.0020-0.0030):
1.
5. Use of the photovoltaic glass clarifier according to any one of claims 1 to 4 in the preparation of photovoltaic glass.
6. The use according to claim 5, characterized in that: The photovoltaic glass preparation comprises the following steps: The glass batch material and the photovoltaic glass clarifier are uniformly mixed in a mass ratio of 1:(0.0015-0.0035), and then sent into an apparatus for melting, and a photovoltaic glass product is prepared by a rolling method.
7. The use according to claim 6, characterized in that: The preparation of the glass batch material comprises: The recycled broken glass is mixed with raw materials according to a certain proportion to obtain the glass batch material.
8. The use according to claim 7, characterized in that: The cullet needs to be treated with an electromagnetic field before being mixed with the raw materials to remove iron filings mixed in the cullet.
9. The use according to claim 8, characterized in that: The voltage applied by the electromagnetic field is 220V; the current is 1.8-2.8A; and the frequency is 30-45Hz.
10. The use according to any one of claims 5 to 8, characterized in that: The final photovoltaic glass product has a light transmittance of 92.5%-97%, a compressive strength of 100-200MPa, a tensile strength of 40-100MPa, and a flexural strength of 50-200MPa.