Glass composition with ultraviolet cut-off function and manufacturing method and application thereof

Abstract

The invention relates to a glass composition with ultraviolet cut-off and a manufacturing method and application thereof. The glass composition is an aluminosilicate glass-based composition or a soda-lime glass-based composition; the aluminosilicate glass-based composition comprises the following components in percentage by weight: 10-30wt% of Al2O3, greater than 1wt% and less than or equal to 10wt% of CeO2; the soda-lime glass-based composition comprises the following components in percentage by weight: 5 to 20 weight percent of Na2O, 5 to 15 weight percent of CaO, 1.0 to 10 weight percent of CeO2, less than 3 weight percent of Al2O3 and less than 0.1 weight percent of P2O5.

Description

Technical Field

[0001] The present invention belongs to the field of glass manufacturing technology, and specifically relates to a glass composition with ultraviolet cutoff, a manufacturing method and uses thereof, and is mainly used in the field of solar photovoltaics, especially the field of perovskite cells. Background Art

[0002] In the field of solar photovoltaics, especially in the field of perovskite cells, the ultraviolet cutoff performance of glass materials is crucial. The high energy of ultraviolet light may cause photodegradation of battery materials, thereby affecting the performance and life of the battery. At present, the technical means for existing perovskite solar cells to achieve the ultraviolet cutoff function often adopts cerium dioxide-titanium dioxide composite film coating on the surface of ordinary glass substrate to achieve ultraviolet cutoff performance. For example, Chinese Patent 1 (Publication No. CN107845730A, Title: A Cheap and Efficient Perovskite Solar Cell and Its Preparation Method) discloses that cerium dioxide-titanium dioxide composite film achieves ultraviolet cutoff performance. However, although it can achieve ultraviolet cutoff, it will affect its visible light transmittance, making it difficult to meet the needs of high-efficiency photovoltaic cells. Therefore, it is of great practical significance to develop a flat glass with high ultraviolet cutoff performance and excellent visible light transmittance. Summary of the Invention

[0003] To this end, the present invention provides a glass composition with UV cutoff, a manufacturing method and use thereof to solve the above technical problems. The glass composition has high UV cutoff performance, good UV aging resistance and excellent visible light transmittance.

[0004] A first aspect of the present invention provides a glass composition, wherein the glass composition is an aluminosilicate glass-based composition or a soda-lime glass-based composition;

[0005] In terms of weight percentage, the aluminosilicate glass-based composition comprises 10-30 wt % of Al2O3, >1 wt % and ≤10 wt % of CeO2;

[0006] In terms of weight percentage, the soda-lime glass-based composition comprises 5-20 wt % of Na2O, 5-15 wt % of CaO, 1.0-10 wt % of CeO2, less than 3 wt % of Al2O3, and less than 0.1 wt % of P2O5.

[0007] In the aluminosilicate glass-based composition, by combining Al2O3 and CeO2 at specific contents, excellent UV cutoff can be achieved while also meeting high transmittance in the 400-700 nm band. Al2O3 can also increase the surface compressive stress and enhance the strengthening depth during the chemical strengthening process, while CeO2 reduces the initial UV transmittance of the glass and further reduces the transmittance of the glass after exposure to sunlight. If the CeO2 content does not meet the above-defined numerical range, it is impossible to achieve excellent UV cutoff while meeting high transmittance in the 400-700 nm band. In addition, when the CeO2 content exceeds 10 wt%, the glass crystallizes. Preferably, the CeO2 content in the aluminosilicate glass-based composition is 1.25-10 wt%, preferably 1.25-8 wt%, more preferably 1.25-6 wt%, and most preferably 1.5-5 wt%.

[0008] In the soda-lime glass-based composition, CeO2 has the effect of reducing the initial UV transmittance of the glass and further reducing the UV transmittance of the glass after exposure to sunlight. By using a specific CeO2 content, excellent UV cutoff can be achieved while also meeting high transmittance in the 400-500nm band. Furthermore, P2O5 exists as an impurity element in the soda-lime glass-based composition and is a harmful substance during glass melting, so the P2O5 content must be controlled to less than 0.1%. Furthermore, if the CeO2 content does not meet the above-defined numerical range, it is impossible to achieve excellent UV cutoff while meeting high transmittance in the 400-700nm band. Furthermore, when the CeO2 content exceeds 10wt%, the glass crystallizes. Preferably, the CeO2 content in the soda-lime glass-based composition is 1.25-10wt%, preferably 1.25-8wt%, more preferably 1.25-6wt%, and most preferably 1.5-5wt%.

[0009] Preferably, the glass composition (aluminosilicate glass-based composition or soda-lime glass-based composition) further comprises a clarifier, and the mass fraction of the clarifier does not exceed 0.5 wt%;

[0010] And / or, the glass composition further comprises a fining agent and other inevitable impurities, and the total mass fraction of the fining agent and other inevitable impurities does not exceed 1.0 wt%;

[0011] Preferably, the clarifier is selected from at least one of antimony pentoxide, tin dioxide, sulfate, chlorine compound, fluorine compound, arsenic trioxide, or a combination thereof.

[0012] In the present invention, the type of clarifier used is not particularly limited, and it only needs to promote the elimination of bubbles in the molten glass liquid. In addition, the type of clarifier selected has a negligible effect on the optical properties of the final glass composition and other products.

[0013] Preferably, the aluminosilicate glass-based composition further comprises: TiO2 and / or Fe2O3, wherein the TiO2 content is greater than 0 and ≤ 5 wt%, preferably 0.5 wt% to 5 wt%, and the Fe2O3 content is greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%. Doping the aluminosilicate glass with no more than 5 wt% of TiO2 serves to adjust the transmittance of the glass in the ultraviolet band. Excessive addition of TiO2 affects the high transmittance of the aluminosilicate glass in the 400-700 nm band. Doping the aluminosilicate glass-based composition with no more than 0.4 wt% (preferably < 0.2 wt%) of Fe2O3 further reduces the transmittance at 380 nm while having less impact on the transmittance in the 400-700 nm band. Excessive addition of Fe2O3 significantly affects the transmittance in the 400-700 nm band.

[0014] Preferably, the mass ratio of TiO2 to CeO2 in the aluminosilicate glass is 0 to 2, preferably 0 to 1, more preferably 0 to 0.8, and most preferably 0.1 to 0.6. Within this range of TiO2 to CeO2 mass ratios, the aluminosilicate glass exhibits a lower UV transmittance while maintaining the total mass fraction of CeO2 + TiO2, and exhibits minimal change in visible light transmittance. If the mass ratio of TiO2 to CeO2 is greater than 2, the aluminosilicate glass requires a higher total mass fraction of CeO2 + TiO2 to achieve the same UV transmittance, and the visible light transmittance decreases significantly.

[0015] Preferably, the soda-lime glass-based composition further comprises: TiO2 and / or Fe2O3, wherein the TiO2 content is greater than 0 and ≤ 5 wt%, preferably 0.5 wt% to 5 wt%, and the Fe2O3 content is greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%. The additional doping of no more than 5 wt% of TiO2 serves to adjust the transmittance of the glass in the ultraviolet band. Excessive addition of TiO2 affects the high transmittance of the aluminosilicate glass in the 400-700 nm band. Doping the aluminosilicate glass-based composition with no more than 0.4 wt% (preferably < 0.2 wt%) of Fe2O3 can further reduce the transmittance at 380 nm while having less impact on the transmittance in the 400-700 nm band. Excessive addition of Fe2O3 can significantly affect the transmittance in the 400-700 nm band.

[0016] Preferably, the mass ratio of TiO2 to CeO2 in the soda-lime glass matrix is ​​0 to 2, preferably 0 to 1, more preferably 0 to 0.8, and most preferably 0.1 to 0.6. Within this TiO2 to CeO2 mass ratio range, the soda-lime glass exhibits a lower UV transmittance while maintaining the total mass fraction of CeO2 + TiO2, and exhibits minimal change in visible light transmittance. If the TiO2 to CeO2 mass ratio is higher than 2, the soda-lime glass requires a higher total mass fraction of CeO2 + TiO2 to achieve the same UV transmittance, and the UV transmittance decreases significantly after exposure to sunlight.

[0017] Preferably, the aluminosilicate glass-based composition further comprises: SiO2 40-75wt%, B2O3 0-20wt%, K2O 0-6wt%, Li2O+Na2O+K2O=4-30wt%, MgO+CaO+SrO+BaO+ZnO=0-15wt%, TiO2 0-5wt%, and Fe2O3 0-0.4.

[0018] Preferably, the composition of the aluminosilicate glass-based composition satisfies the following: SiO2 40-75wt%, Al2O3 10-30wt%, B2O3 0-20wt%, K2O 0-6wt%, Li2O+Na2O+K2O=4-30wt%, MgO+CaO+SrO+BaO+ZnO=0-15wt%, CeO2 1.25-8wt%, TiO2 0-5wt%, Fe2O3 0-<0.2wt%.

[0019] Preferably, the composition of the aluminosilicate glass-based composition satisfies the following: SiO2 53~65wt%, Al2O3 12~25wt%, B2O3 0~8wt%, K2O 0~5wt%, Li2O+Na2O+K2O=10~20wt%, MgO+CaO+SrO+BaO+ZnO=2~6wt%, CeO2 1.25~6wt%, TiO2 0~5wt%, Fe2O3 0~<0.2wt%.

[0020] Preferably, in the soda-lime glass-based composition, the Al2O3 content is 0.01-2wt%, and / or the CeO2 content is 1.25-10wt%, preferably 1.25-8wt%, more preferably 1.25-6wt%, and most preferably 1.5-5wt%, which can further improve the ultraviolet cutoff performance and transmittance of the soda-lime glass-based composition in the 400-500nm band.

[0021] Preferably, the soda-lime glass-based composition further comprises: SiO2 40-81 wt%, K2O 0-10 wt%, MgO 0-10 wt%, TiO2 0-5 wt%, and Fe2O3 0-0.4 wt%.

[0022] Preferably, the composition of the soda-lime glass-based composition satisfies the following: SiO2 40-81wt%, Na2O 5-20wt%, CaO 5-15wt%, Al2O3 0-<3wt%, K2O 0-10wt%, MgO 0-10wt%, CeO2 1.25-8wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

[0023] Preferably, the composition of the soda-lime glass-based composition satisfies the following: SiO2 65-75wt%, Na2O 10-15wt%, CaO 7-10wt%, Al2O3 0.01-2wt%, K2O 0.1-6wt%, MgO 0-5wt%, CeO2 1.25-6wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

[0024] Preferably, the glass composition has one or more of the following characteristics:

[0025] The transmittance of the glass composition at a wavelength of 340 nm measured by a spectrophotometer is ≤40 / t%, preferably ≤30 / t%, more preferably ≤15 / t%, and more preferably ≤5 / t%, where t is the thickness of the glass composition in millimeters;

[0026] The transmittance of the glass composition at a wavelength of 360 nm measured by a spectrophotometer is ≤60 / t%, preferably ≤40 / t%, more preferably ≤20 / t%, and more preferably ≤10 / t%, where t is the thickness of the glass composition in millimeters;

[0027] The transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-3*t%, preferably ≤90-8*t%, more preferably ≤90-15*t%, and more preferably ≤90-25*t%, where t is the thickness of the glass composition in millimeters;

[0028] The average transmittance of the glass composition in the visible light band of 400 to 500 nm measured by a spectrophotometer is ≥60%, preferably ≥70%, more preferably ≥80%, and more preferably ≥85%;

[0029] The average transmittance of the glass composition measured by a spectrophotometer in the visible light band of 400 to 700 nm is ≥80%, preferably ≥85%, and more preferably ≥88%.

[0030] Preferably, the glass composition has a characteristic of reduced transmittance at a wavelength of 380 nm after sunlight irradiation or ultraviolet irradiation treatment;

[0031] More preferably, when the glass composition is subjected to sunlight irradiation or ultraviolet irradiation treatment, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer decreases until it remains stable;

[0032] Most preferably, the glass composition having a stable transmittance at a wavelength of 380 nm is subjected to a second sunlight irradiation treatment or a second ultraviolet irradiation treatment, and the transmittance of the glass composition having a stable transmittance at a wavelength of 380 nm measured by a spectrophotometer decreases by less than 5%.

[0033] The glass composition has one or more of the following characteristics:

[0034] After 15 kWh / m 2 After exposure to sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-12*t%, preferably ≤90-18*t%, more preferably ≤90-22*t%, and more preferably ≤90-27*t%, wherein t is the thickness of the glass composition in millimeters;

[0035] After 45 kWh / m 2 After exposure to sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-13*t%, preferably ≤90-19*t%, more preferably ≤90-23*t%, and more preferably ≤90-28*t%, wherein t is the thickness of the glass composition in millimeters;

[0036] After 15 kWh / m 2 After irradiation with sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is reduced compared with the transmittance at 380 nm before irradiation, and the calculation method is ((transmittance before irradiation T 380nm - Transmittance after irradiation T' 380nm ) / transmittance before irradiation T 380nm )*100%,>2.5*t%, preferably ≥3.3*t%, more preferably ≥5*t%, most preferably>6.6*t%, wherein t is the thickness of the glass composition in millimeters.

[0037] After 45 kWh / m2 After irradiation with sunlight, the transmittance decrease of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is compared with the transmittance decrease at 380 nm before irradiation, and the calculation method is ((transmittance before irradiation T 380nm - Transmittance after irradiation T' 380nm ) / transmittance before irradiation T 380nm )*100%,>3.3*t%, preferably ≥4*t%, more preferably ≥6*t%, most preferably>8*t%, wherein t is the thickness of the glass composition in millimeters.

[0038] In the present invention, the characteristic of glass that its transmittance at 380 nm decreases after irradiation can be utilized to reduce the transmittance of the glass composition after sunlight or ultraviolet irradiation. If the transmittance of the glass composition at 380 nm is stable after prior irradiation treatment, the transmittance at 380 nm will not continue to decrease after further irradiation treatment.

[0039] A second aspect of the present invention provides a method for producing a glass composition, comprising weighing and mixing required raw materials for an aluminosilicate glass-based composition or a soda-lime glass-based composition, and then melting and cooling the mixture to produce the glass composition. The required raw materials are commonly used raw materials familiar to those skilled in the art based on the composition of the glass composition.

[0040] Preferably, the glass composition is subjected to sunlight irradiation treatment or ultraviolet irradiation treatment.

[0041] Preferably, the obtained glass composition is subjected to a tempering treatment, wherein the tempering treatment is physical tempering or chemical tempering.

[0042] A third aspect of the present invention provides a flat glass, which is made of the above-mentioned glass composition; preferably, the thickness of the flat glass is ≥0.1 mm, more preferably ≥0.5 mm, even more preferably ≥1 mm, further preferably ≥2 mm, and most preferably ≥3 mm; further preferably, the thickness of the flat glass does not exceed 20 mm.

[0043] Preferably, the flat glass further comprises: an optical film layer and / or a conductive layer provided on at least one surface of the flat glass; more preferably, the optical film layer is at least one or more layers selected from the group consisting of an anti-reflection film layer, a self-cleaning film layer, a dust-proof film layer, a wear-resistant film layer, and a light-conversion film layer;

[0044] More preferably, the conductive layer is preferably a transparent conductive layer, more preferably at least one of fluorine-doped tin dioxide, indium tin oxide, and zinc oxide-based materials;

[0045] More preferably, the thickness of the optical film layer on each surface of the flat glass does not exceed 1000 nm, and / or the thickness of the conductive layer does not exceed 1000 nm.

[0046] A fourth aspect of the present invention provides a method for manufacturing flat glass, comprising weighing and mixing required raw materials for an aluminosilicate glass-based composition or a soda-lime glass-based composition, and then melting, shaping, and cooling the resulting flat glass. The required raw materials are commonly used raw materials familiar to those skilled in the art based on the composition of the glass composition.

[0047] Preferably, the forming method is selected from float method, down-draw method, overflow method, calendaring method or up-draw method.

[0048] Preferably, the glass composition is subjected to sunlight irradiation treatment or ultraviolet irradiation treatment.

[0049] Preferably, the flat glass is subjected to a tempering treatment, wherein the tempering treatment is physical tempering or chemical tempering; and / or, an optical film layer is prepared on at least one surface of the flat glass.

[0050] A fifth aspect of the present invention provides a use of the above-mentioned glass composition in the field of solar photovoltaics, wherein the solar photovoltaic field preferably includes perovskite solar cells, heterojunction cells, and TOPCon cells (tunneling oxide passivation contact cells).

[0051] A sixth aspect of the present invention provides a use of the aforementioned flat glass in the field of solar photovoltaics, preferably including perovskite solar cells. The flat glass of the present invention and the glass composition have the same performance parameters of UV cutoff and transmittance at 400-500 nm. When used in the field of solar photovoltaics, the flat glass can meet the requirements of high-efficiency photovoltaic cells.

[0052] Beneficial effects of the present invention:

[0053] 1. The glass composition and flat glass of the present invention have excellent ultraviolet cutoff performance, which is mainly achieved by optimizing the composition of the glass composition, such as the combined use of specific amounts of cerium oxide, optional titanium oxide, and optional iron oxide, thereby significantly improving the cutoff performance of the glass in the ultraviolet region and effectively preventing ultraviolet light from photodegrading photovoltaic cell materials.

[0054] 2. The glass composition and flat glass of the present invention have high visible light transmittance, mainly with an average transmittance of ≥80% in the visible light region of 400 to 700 nanometers, thereby ensuring the photoelectric conversion efficiency of photovoltaic cells.

[0055] 3. The glass composition and flat glass of the present invention have unique ultraviolet transmittance, such as 15 kWh / m 2After exposure to sunlight, the UV transmittance of 3mm thick glass composites and flat glass at 380nm can be further reduced by 8% or more, significantly extending the service life of the glass and photovoltaic cells.

[0056] 4. The glass composition or flat glass of the present invention can have its UV transmittance reduced by sunlight exposure or UV irradiation.

[0057] 5. The glass composition or flat glass of the present invention can be physically or chemically tempered to increase its strength.

[0058] 6. The flat glass of the present invention can be coated with a surface coating (optical film layer) to further optimize the transmittance, such as reducing the ultraviolet transmittance or / and simultaneously increasing the visible light transmittance.

[0059] 7. The flat glass of the present invention can be coated with a transparent conductive coating to further enhance the functionality of the glass to meet the needs of high-end photovoltaic applications such as perovskite cells.

[0060] 8. The glass composition and flat glass of the present invention can be produced and formed by various methods, such as float process, down-draw process, overflow process, rolling process, up-draw process or crucible melting process, which can be selected according to actual needs and have wide industrial applicability.

[0061] 9. The glass composition and flat glass of the present invention have wide applicability and can be applied to the field of solar photovoltaic, especially the field of perovskite cells, and have broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 These are optical photographs of the flat glass prepared in Comparative Example 1 and Example 8 of the present invention, with the left side showing the flat glass of Comparative Example 1 and the right side showing the flat glass of Example 8;

[0063] Figure 2 The flat glass prepared in Comparative Example 1 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0064] Figure 3 The flat glass prepared in Example 1 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0065] Figure 4 The flat glass prepared in Example 3 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0066] Figure 5 The flat glass prepared in Example 4 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0067] Figure 6 The flat glass prepared in Example 8 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0068] Figure 7 The flat glass prepared in Example 9 was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %;

[0069] Figure 8 The flat glass prepared in Example 12 (with an optical film layer on the surface) was heated to 15 kWh / m 2 Irradiation, 45kWh / m 2 Transmittance spectrum before and after irradiation, where the horizontal axis is wavelength / nm and the vertical axis is transmittance / %. DETAILED DESCRIPTION

[0070] In order to better understand the above technical solutions of the present application, the present application is further elaborated and explained below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that such elaboration and explanation should not be construed as imposing any limitation on the scope of protection of the present application.

[0071] In the present disclosure, the glass composition is an aluminosilicate glass-based composition or a soda-lime glass-based composition, both of which have excellent UV-cutting properties. For example, according to spectrophotometric testing, the transmittance of a 3 mm thick glass composition (aluminosilicate glass-based composition or soda-lime glass-based composition) is 0 at a wavelength of 340 nm, ≤50% at a wavelength of 380 nm, and ≥80% in the wavelength range of 400 to 700 nm.

[0072] In one embodiment of the present invention, the aluminosilicate glass-based composition contains SiO2. SiO2, as the primary component of the aluminosilicate glass, is present in an amount of 40 to 75% by weight, preferably 53 to 65% by weight. SiO2 provides the backbone of the glass network and is the most important glass former. The SiO2 content should not be less than 40% by weight, otherwise the glass sheet will be difficult to form and crystallize. However, excessive SiO2 content can result in excessively high melting temperatures. Generally, the SiO2 content in aluminosilicate glass should be less than 75% by weight. In a preferred embodiment, the SiO2 content is controlled between 53 and 65% by weight, taking into account the difficulty of the forming and melting processes.

[0073] In one embodiment of the present invention, the aluminosilicate glass-based composition contains Al2O3, and its content is 10 to 30 wt% (preferably 12 to 25 wt%). Al2O3 can serve as a glass network former or network modifier. Depending on the content of Al2O3, AlO4 tetrahedrons or AlO6 hexahedrons can be formed, and Al2O3 can form channels for ion exchange in the positive glass grid to adjust the ion exchange rate. If the aluminum oxide content in the aluminosilicate glass-based composition is less than 10 wt%, the effect of improving the ion exchange channel is limited, which is not conducive to thickness ion exchange. If the Al2O3 content exceeds 30 wt%, it will increase the melting temperature of the glass and make the glass easy to crystallize, which is not conducive to production.

[0074] In one embodiment of the present invention, the aluminosilicate glass-based composition contains CeO2 in an amount greater than 1-10 wt %, preferably 1.25-10 wt %, more preferably 1.25-8 wt %, even more preferably 1.25-6 wt %, even more preferably 1.5-5 wt %, and most preferably 2-5 wt %. The CeO2 reduces the initial UV transmittance of the glass. Furthermore, the present invention surprisingly discovered that the addition of CeO2 can further reduce the UV transmittance of the glass after exposure to sunlight and / or UV light, thereby further improving the UV cutoff performance of the composition after exposure.

[0075] In one embodiment of the present invention, the aluminosilicate glass-based composition further comprises TiO2, the content of which is greater than 0 and less than 5 wt%, preferably 0.5 to 5 wt%. The addition of TiO2 can improve its optical properties.

[0076] In one embodiment of the present invention, the mass ratio of TiO2 to CeO2 in the aluminosilicate glass-based composition is 0 to 2, preferably 0 to 1, more preferably 0 to 0.8, and most preferably 0.1 to 0.6. By setting the mass ratio of TiO2 to CeO2 within this numerical range, the ultraviolet cutoff performance of the glass composition can be further improved, and the transmittance in the visible light band can be increased.

[0077] In one embodiment of the present invention, the aluminosilicate glass-based composition further includes Fe2O3, with an amount greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%. The addition of a small amount of Fe2O3 can improve the ultraviolet cutoff performance of the glass composition without affecting its transmittance in the visible light band. Excessive addition of Fe2O3 can significantly reduce its transmittance in the visible light band.

[0078] In one embodiment of the present invention, the aluminosilicate glass-based composition further comprises TiO2 and Fe2O3, wherein the TiO2 content is greater than 0 and ≤ 5 wt%, and the Fe2O3 content is greater than 0 and ≤ 0.4 wt%. Preferably, the aluminosilicate glass-based composition further comprises TiO2 and Fe2O3, wherein the TiO2 content is 0.5-5 wt%, and the Fe2O3 content is greater than 0 and < 0.2 wt%.

[0079] In one embodiment of the present invention, the aluminosilicate glass-based composition includes B2O3, and the B2O3 in the glass network forms two different polyhedral structures that are more suitable for bearing external forces. The addition of B2O3 generally results in lower thermal expansion and a lower Young's modulus, thereby providing the glass composition with good thermal shock resistance and a slower chemical tempering rate. Therefore, the addition of B2O3 can improve the subsequent chemical tempering processing window of the glass composition or flat glass or produce ultra-thin flat glass. In a preferred embodiment, the B2O3 content is controlled between 0 and 20 wt%, preferably 0 to 8 wt%. If the B2O3 content is too high, it will lead to an increase in the melting temperature of the glass and optionally reduce the subsequent chemical tempering performance.

[0080] In one embodiment of the present invention, the aluminosilicate glass-based composition includes K2O. Adding a small amount of K2O to the glass composition can also increase the rate of optional subsequent chemical tempering. Therefore, the K2O content is controlled to be 0-6 wt%, preferably 0-5 wt%.

[0081] In one embodiment of the present invention, the aluminosilicate glass-based composition further comprises at least one of Na2O and Li2O, which have similar functions and are used as glass working modifiers. The addition of Li2O+Na2O+K2O can destroy the glass network and form non-bridging oxides within the glass network. Moreover, the addition of alkaline oxides can lower the melting temperature of the glass and increase the CTE of the glass. During chemical tempering, the surface compressive stress generated by the exchange of Na and Li with elements with larger ionic radius, such as K, is the key to improving the strength of the glass. However, excessive Na and Li will increase the risk of devitrification of the glass. Therefore, the sum of the contents of Li2O+Na2O+K2O can be controlled between 4 and 30 wt%.

[0082] In one embodiment of the present invention, the aluminosilicate glass-based composition comprises at least one of MgO, CaO, SrO, BaO, and ZnO. However, considering that excessive addition may lead to glass crystallization, the sum of the MgO, CaO, SrO, BaO, and ZnO contents is controlled to be between 0 and 15 wt%.

[0083] In one embodiment of the present invention, the aluminosilicate glass-based composition comprises: SiO2 40-75wt%, Al2O3 10-30wt%, B2O3 0-20wt%, K2O 0-6wt%, Li2O+Na2O+K2O=4-30wt%, MgO+CaO+SrO+BaO+ZnO=0-15wt%, CeO2>1-10wt%, TiO2 0-5wt%, and Fe2O3 0-0.4wt%.

[0084] In a preferred embodiment of the present invention, the aluminosilicate glass-based composition comprises: SiO2 53-65wt%, Al2O3 12-15wt%, B2O3 0-8wt%, K2O 0-5wt%, Li2O+Na2O+K2O=8-20wt%, MgO+CaO+SrO+BaO+ZnO=1-6wt%, CeO2 1.25-6wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

[0085] In one embodiment of the present invention, the aluminosilicate glass-based composition glass further comprises a clarifier, the mass fraction of the clarifier being no more than 0.5 wt%, preferably no more than 0.3 wt%, and the clarifier being selected from antimony pentoxide (Sb2O5), sulfates, tin dioxide (SnO2), chlorine compounds, fluorine compounds, arsenic trioxide (As2O3) or combinations thereof.

[0086] In one embodiment of the present invention, the aluminosilicate glass-based composition further comprises a fining agent and other inevitable impurities, wherein the total weight fraction of the fining agent and other inevitable impurities does not exceed 1.0 wt%, preferably does not exceed 0.5 wt%. Preferably, the fining agent is selected from antimony pentoxide (Sb2O5), sulfates, tin dioxide (SnO2), chlorine compounds, fluorine compounds, arsenic trioxide (As2O3), or combinations thereof, and the weight fraction of the fining agent does not exceed 0.5 wt%, preferably does not exceed 0.3 wt%.

[0087] In one embodiment of the present invention, the soda-lime glass-based composition contains SiO2 in an amount of 40-81 wt%, preferably 65-75 wt%. As the primary component of the soda-lime glass-based composition, SiO2 provides the backbone of the glass network and is the most important glass former. The SiO2 content should not be less than 40 wt%, otherwise the glass sheet will be difficult to form and crystallize. However, excessive SiO2 content can result in excessively high melting temperatures. Generally, the SiO2 content in soda-lime glass should be less than 81 wt%. In a preferred embodiment, the SiO2 content is controlled between 65 and 75 wt%, taking into account the difficulty of the forming and melting processes.

[0088] In one embodiment of the present invention, the soda-lime glass-based composition contains Na2O, which, as a major component, can disrupt the glass network and form non-bridging oxides within the glass network. Therefore, the Na2O content is controlled to be between 5 and 20 wt%, preferably between 10 and 15 wt%.

[0089] In one embodiment of the present invention, the soda-lime glass-based composition contains CaO, which serves as a network modifier and is used to reduce the forming temperature of the glass. Therefore, the CaO content is controlled between 5 and 15 wt%, preferably between 7 and 10 wt%.

[0090] In one embodiment of the present invention, the soda-lime glass-based composition contains a small amount of Al2O3, which can act as a glass network former and glass network modifier. Considering that too high alumina content will increase the melting temperature of the melt, the present invention controls the Al2O3 content to be less than 3wt%.

[0091] In one embodiment of the present invention, the soda-lime glass-based composition needs to avoid the presence of the impurity element P (P2O5) as much as possible. Therefore, the content of P2O5 is controlled to be less than 0.1 wt%.

[0092] In one embodiment, the soda-lime glass-based composition contains CeO2 in an amount greater than 1-10 wt %, preferably 1.25-10 wt %, more preferably 1.25-8 wt %, more preferably 1.25-6 wt %, even more preferably 1.5-5 wt %, and most preferably 2-5 wt %. The CeO2 reduces the initial UV transmittance of the glass and further reduces the UV transmittance of the glass after exposure to sunlight, thereby improving the UV cutoff performance of the soda-lime glass-based composition.

[0093] In one embodiment of the present invention, the soda-lime glass-based composition further comprises TiO2, wherein the content thereof is greater than 0 and less than 5 wt%, preferably 0.5 to 5 wt%. The addition of TiO2 can improve the optical properties.

[0094] In one embodiment of the present invention, the mass ratio of TiO2 to CeO2 in the soda-lime glass-based composition is 0 to 2, preferably 0 to 1, more preferably 0 to 0.8, and most preferably 0.1 to 0.6. By setting the mass ratio of TiO2 to CeO2 within the above numerical range, the ultraviolet cutoff performance of the glass composition can be further improved, and the transmittance in the visible light band can be increased.

[0095] In one embodiment of the present invention, the soda-lime glass-based composition further includes Fe2O3, with an amount greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%. The addition of a small amount of Fe2O3 can improve the ultraviolet cutoff performance of the glass composition without affecting its transmittance in the visible light band. Excessive addition of Fe2O3 can significantly reduce its transmittance in the visible light band.

[0096] In one embodiment, the soda-lime glass-based composition comprises TiO2 and Fe2O3, wherein the content of TiO2 is greater than 0 and ≤ 5 wt%, and the content of Fe2O3 is greater than 0 and ≤ 0.4 wt%. Preferably, the content of TiO2 in the soda-lime glass-based composition is 0.5-5 wt%, and the content of Fe2O3 is greater than 0 and < 0.2 wt%.

[0097] In one embodiment, the soda-lime glass-based composition includes K2O. Adding a small amount of K2O to the glass composition can also increase the rate of optional subsequent chemical tempering. Therefore, the K2O content is controlled to not exceed 10 wt%, preferably between 0.1 and 6 wt%.

[0098] In one embodiment, the soda-lime glass-based composition comprises MgO, wherein MgO can reduce the melting temperature of the glass. In the present invention, the content of MgO is controlled to be no more than 10 wt%, preferably between 2 and 5 wt%.

[0099] In one embodiment, the soda-lime glass-based composition glass further comprises a fining agent, the mass fraction of the fining agent is no more than 0.5 wt%, preferably no more than 0.3 wt%, and the fining agent is selected from antimony pentoxide (Sb2O5), sulfate, tin dioxide (SnO2), chlorine compounds, fluorine compounds, arsenic trioxide (As2O3) or a combination thereof.

[0100] In one embodiment, the soda-lime glass-based composition further comprises a fining agent and other inevitable impurities, wherein the total weight fraction of the fining agent and other inevitable impurities does not exceed 1.0 wt%, preferably does not exceed 0.5 wt%. Preferably, the fining agent is selected from antimony pentoxide (Sb2O5), sulfates, tin dioxide (SnO2), chlorine compounds, fluorine compounds, arsenic trioxide (As2O3), or combinations thereof, and the weight fraction of the fining agent does not exceed 0.5 wt%, preferably does not exceed 0.3 wt%.

[0101] In one embodiment, the soda-lime glass-based composition comprises: SiO2 40-81 wt%, Al2O3 0-<3 wt%, Na2O 5-20 wt%, K2O 0-10 wt%, MgO 0-10 wt%, CaO 5-15 wt%, CeO2>1-10 wt%, TiO2 0-5 wt%, and Fe2O3 0-0.4.

[0102] In a preferred embodiment, the soda-lime glass-based composition comprises: SiO2 65-75wt%, Na2O 10-15wt%, CaO 7-10wt%, Al2O3 0.01-2wt%, K2O 0.1-6wt%, MgO 0-5wt%, CeO2 1.25-6wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

[0103] In one embodiment of the present invention, the method for manufacturing the aluminosilicate glass-based composition includes: weighing and mixing the raw materials required for the aluminosilicate glass-based composition, and then melting and cooling to obtain the aluminosilicate glass-based composition. The raw materials required for the aluminosilicate glass-based composition include: oxide powders corresponding to each component (such as SiO2 powder, Al2O3 powder, B2O3 powder, MgO powder, ZnO powder, CeO2 powder, TiO2 powder, Fe2O3 powder), metal oxide powders (such as metal carbonate powders (such as sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, etc.), metal nitrate powders, metal sulfate powders, etc.), metal hydroxide powders (sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc.), etc. The melting temperature is 1400-1650°C, and the holding time is 1-4 hours. The cooling is generally directly cooled to room temperature.

[0104] In one embodiment of the present invention, the method for manufacturing the soda-lime glass-based composition includes: weighing and mixing the raw materials required for the soda-lime glass-based composition, and then melting and cooling to obtain the soda-lime glass-based composition. The raw materials required for the soda-lime glass-based composition include: oxide powders corresponding to each component (such as SiO2 powder, MgO powder, CaO powder, CeO2 powder, TiO2 powder, Fe2O3 powder), metal oxide powders (such as metal carbonate powders (such as sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, etc.), metal nitrate powders, metal sulfate powders, etc.), metal hydroxide powders (sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc.), etc. The melting temperature is 1400-1650°C, and the holding time is 1-4 hours. The cooling is generally directly cooled to room temperature.

[0105] The present disclosure also provides flat glass, which is made from the above-mentioned glass composition, i.e., has the same composition as the glass composition. The flat glass is soda-lime glass-based or aluminosilicate-based. Preferably, the thickness of the flat glass is ≥ 0.1 mm, more preferably ≥ 0.5 mm, more preferably ≥ 1 mm, even more preferably ≥ 2 mm, and most preferably ≥ 3 mm. Preferably, the thickness of the flat glass does not exceed 20 mm. For example, as needed, the thickness of the flat glass can be 0.1 mm, 0.15 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 20 mm, etc.

[0106] In one embodiment of the present invention, the method for manufacturing soda-lime glass-based flat glass comprises: weighing and mixing the raw materials required for a soda-lime glass-based composition, and then melting, forming, and cooling to obtain the flat glass. The raw materials required for the soda-lime glass-based composition include: oxide powders corresponding to the respective components (e.g., SiO2 powder, Na2O powder, K2O powder, MgO powder, CaO powder, CeO2 powder, TiO2 powder, Fe2O3 powder), metal oxide powders (e.g., metal carbonate powders (e.g., sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, etc.), metal nitrate powders, metal sulfate powders, etc.), and metal hydroxide powders (e.g., sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc.). The melting temperature and melting time during the mass production of flat glass are determined by professionals in this field based on the composition. Cooling is generally performed directly to room temperature. The forming method is selected from float glass, down-draw, overflow, rolling, or up-draw. Subsequently, an optical film layer can be coated on the surface of the flat glass as needed to further enhance its functionality and applicability and further optimize transmittance, such as reducing UV transmittance or / and simultaneously increasing visible light transmittance.

[0107] In one embodiment of the present invention, a method for manufacturing aluminosilicate glass-based flat glass comprises weighing and mixing the raw materials required for an aluminosilicate glass-based composition, followed by melting, forming, and cooling to obtain the flat glass. The raw materials required for the aluminosilicate glass-based composition include oxide powders corresponding to the respective components (e.g., SiO2 powder, Al2O3 powder, B2O3 powder, MgO powder, ZnO powder, CeO2 powder, TiO2 powder, Fe2O3 powder), metal oxide powders (e.g., metal carbonate powders (e.g., sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, etc.), metal nitrate powders, metal sulfate powders, etc.), and metal hydroxide powders (e.g., sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc.). The melting temperature and melting time during the mass production of flat glass are determined by professionals in the field based on the composition. Cooling is generally performed directly to room temperature. The forming method is selected from float, down-draw, overflow, rolling, or up-draw. Subsequently, an optical film layer can be coated on the surface of the flat glass as needed to further enhance its functionality and applicability.

[0108] In one embodiment of the present invention, the glass composition or flat glass has a characteristic of reducing transmittance at a wavelength of 380 nm after sunlight irradiation or ultraviolet irradiation. The power of the sunlight irradiation is 1 to 100 kW / m 2 The irradiation time is 0.5 to 10 hours. The power of the ultraviolet irradiation treatment is 50 to 10000 W / m 2 , the irradiation time is 0.5 to 10 hours.

[0109] In one embodiment of the present invention, the glass composition or flat glass can be subjected to sunlight irradiation or ultraviolet irradiation treatment to reduce the transmittance at 380 nm of the glass composition or flat glass by utilizing the property that the transmittance at 380 nm decreases after irradiation. The power of the sunlight irradiation treatment is 1 to 100 kW / m 2 The irradiation time is 0.5 to 10 hours. The power of the ultraviolet irradiation treatment is 50 to 10000 W / m 2 , the irradiation time is 0.5 to 10 hours. Moreover, the glass composition or flat glass of the present invention is subjected to sufficient irradiation (for example, sunlight irradiation treatment of at least about 15 kWh / m 2 , UV irradiation treatment of at least about 1 kWh / m 2 ), the 380nm transmittance of the glass composition or flat glass becomes stable. Even with continued irradiation with increased irradiation doses or secondary irradiation after a few days (i.e., secondary sunlight irradiation or secondary UV irradiation), the 380nm transmittance no longer decreases significantly (with a decrease of less than 5%). The irradiation parameters for the secondary irradiation can refer to those for the initial irradiation.

[0110] In one embodiment of the present invention, the present invention preferably provides a step of sunlight irradiation treatment or ultraviolet irradiation treatment during the manufacturing process of the glass composition or flat glass to directly produce a glass composition or flat glass with stable transmittance. The power of the sunlight irradiation treatment is 1 to 100 kW / m 2 The irradiation time is 0.5 to 10 hours. The power of the ultraviolet irradiation treatment is 50 to 10000 W / m 2 , the irradiation time is 0.5 to 10 hours.

[0111] In one embodiment of the present invention, the strength of the glass composition or flat glass can be improved by physical tempering or chemical tempering. The physical tempering or chemical tempering of the present invention is a commonly used tempering method in this field. The physical tempering of the present invention includes first heating the glass composition or flat glass to 550-800°C, then placing it in a cooling device for rapid cooling, and finally returning it to room temperature. Appropriate physical tempering parameters can be selected according to the composition and thickness of the glass composition or flat glass. In some embodiments, physical tempering is preferably used for flat glass with a thickness of ≥3mm, and can also be applied to flat glass with a thickness as low as 1.6mm. The surface compressive stress of soda-lime glass-based or aluminosilicate glass-based flat glass tested using a surface stress meter is above 50MPa, preferably above 70MPa, and more preferably above 90MPa. In other embodiments, chemical tempering is preferably used to improve the strength of aluminosilicate compositions or aluminosilicate flat glass. The molten salt used for chemical tempering of the present invention is KNO3 or a mixture of KNO3 and NaNO3. After chemical tempering, the DoL of the aluminosilicate flat glass measured by the chemically tempered glass surface stress detection instrument FSM6000 exceeds 5 μm, preferably exceeds 10 μm, more preferably exceeds 20 μm, and most preferably exceeds 30 μm. The surface compressive stress CS value of the aluminosilicate flat glass after chemical tempering exceeds 300 MPa, preferably exceeds 400 MPa, and more preferably exceeds 500 MPa.

[0112] In one embodiment of the present invention, an optical coating can be applied to at least one surface of the flat glass to further enhance the transmittance in the visible light band and / or simultaneously improve the glass's UV cutoff performance. For example, after optical coating, the transmittance from 400 to 700 nm can be increased by >3%.

[0113] In one embodiment of the present invention, a conductive layer can be plated on at least one surface of flat glass for use in solar glass. The conductive layer can be made of materials such as FTO (fluorine-doped tin dioxide), ITO (indium tin oxide), or zinc oxide-based materials (such as AZO, aluminum-doped zinc oxide). These transparent conductive layers can facilitate charge transport, reduce contact resistance, and further optimize the overall transmittance of the flat glass. Based on the technical solutions disclosed herein and in accordance with actual application requirements, those skilled in the art can select the conductive layer material, thickness, and process within a reasonable range.

[0114] Performance testing:

[0115] According to the transmittance of the glass composition or flat glass at wavelengths of 340nm and 380nm, the average transmittance in the range of 400-500nm and the range of 400-700nm in the visible light band, and the transmittance after 15 kWh / m 2 , 45 kWh / m 2 The transmittance at a wavelength of 380nm after exposure to sunlight.

[0116] After 15 kWh / m 2 After irradiation with sunlight, the transmittance of the glass composition or flat glass at a wavelength of 380 nm decreases by a percentage = ((transmittance before irradiation T 380nm - Transmittance after irradiation T' 380nm ) / transmittance before irradiation T 380nm )*100%.

[0117] After 45 kWh / m 2 After irradiation with sunlight, the transmittance of the glass composition or flat glass at a wavelength of 380 nm decreases by a percentage = ((transmittance before irradiation T 380nm - Transmittance after irradiation T" 380nm ) / transmittance before irradiation T 380nm )*100%.

[0118] Examples 1-12 (E1-E12) and Comparative Examples 1-4 (CE1-CE4)

[0119] 1) Raw material preparation: According to the components of the soda-lime glass-based composition in Table 1-2, weigh the metal oxides, metal oxylates, or metal hydroxide powders as raw materials and mix them with a clarifier (at least one of antimony pentoxide (Sb2O5), sulfate, tin dioxide (SnO2), a chlorine compound, or a fluorine compound, or a combination thereof, with the total content being controlled at 0.2 wt %) to obtain a mixed powder;

[0120] 2) Melting: Melting the mixed powder in a high-temperature furnace to obtain molten glass;

[0121] 3) Molding: The obtained glass liquid is cast to prepare glass blocks, which are then annealed and cut and polished to obtain flat glass, or blown into flat glass, or formed into flat glass through continuous industrial production methods such as float, downdraw, overflow, updraw, rolling, etc.; the formed flat glass is then slowly cooled to room temperature to avoid stress, thereby obtaining a flat glass product;

[0122] Optional step 4): Physically tempering the flat glass product obtained in step 3) by first heating it to 550-800° C., then placing it in a cooling device for rapid cooling, and finally returning it to room temperature;

[0123] Optional step 5): chemically tempering the flat glass product obtained in step 3), using KNO3 as the molten salt;

[0124] Optional step 6): Coating one surface of the flat glass product obtained in step 3), step 4), or step 5) with an optical coating layer, wherein the optical coating layer comprises an anti-reflection coating having a thickness of 600 nm. The composition and comprehensive performance results of the resulting flat glass are shown in Table 1-2.

[0125] Table 1 shows the composition (unit: wt%) and properties of the soda-lime glass-based flat glass of Examples 1-6 and Comparative Examples 1-3:

[0126]

[0127] By comparison, it can be seen that when a specific content of cerium oxide is added, the resulting soda-lime glass-based flat glass can achieve at least one improvement in ultraviolet cutoff performance, higher visible light (400-700nm) transmittance, and mechanical properties. When CE1 is not doped with cerium oxide, the ultraviolet cutoff performance of the resulting soda-lime glass-based flat glass is poor. When the cerium oxide content in CE3 is too low, the ultraviolet cutoff performance of the resulting soda-lime glass-based flat glass is not significantly improved. When CE2 is only doped with titanium oxide but not with cerium oxide, its ultraviolet cutoff performance is not improved compared to E1. E5 contains an optical film layer, and its T 380nm 、T 400-500nm 、T 400-700nm Compared with the pre-coating performance, the improvement is 4%, 5%, and 6% respectively. This application achieves the improvement of ultraviolet cutoff performance and visible light transmittance by adding a specific content of cerium oxide.

[0128] Table 2 shows the composition (unit: wt%) and properties of the soda-lime glass-based flat glass of Examples 7-12 and Comparative Example 4:

[0129]

[0130] Combined with Table 1-2 and Figure 1-8The following findings emerge: 1) Comparing E1-6 with E7-10, it is clear that adding a specific amount of TiO2 to cerium oxide doping significantly reduces the transmittance of soda-lime glass-based flat glass at 380nm, without affecting transmittance at 340nm or in the visible light band. 2) Compared to E8, E11, with the addition of a small amount of iron oxide, further improves UV cutoff performance. 3) When an excess of iron oxide is added to CE4, while its UV cutoff performance remains excellent, its visible light transmittance (particularly at 400-500nm) decreases. 4) Compared to E8, E12 also includes an optical film layer, which improves its visible light band.

[0131] Examples 13-23 (E13-E23) and Comparative Examples 5-8 (CE5-CE8)

[0132] 1) Raw material preparation: According to the components of the aluminosilicate-based composition designed in Tables 3 and 4, metal oxides, metal oxyates, or metal hydroxide powders are weighed as raw materials and mixed with a clarifier (selected from at least one of antimony pentoxide (Sb2O5), sulfate, tin dioxide (SnO2), chlorine compounds, and fluorine compounds, or a combination thereof, with the total content controlled at 0.2 wt%) to obtain a mixed powder;

[0133] 2) Melting: Melting the mixed powder in a high-temperature furnace to obtain molten glass;

[0134] 3) Molding: The obtained glass liquid is cast to prepare glass blocks, which are then annealed and cut and polished to obtain flat glass, or blown into flat glass, or formed into flat glass through continuous industrial production methods such as float, downdraw, overflow, updraw, rolling, etc.; the formed flat glass is then slowly cooled to room temperature to avoid stress, thereby obtaining a flat glass product;

[0135] Optional step 4): Physically tempering the flat glass product obtained in step 3) by first heating it to 600-750° C., then placing it in a cooling device for rapid cooling, and finally returning it to room temperature;

[0136] Optional step 5): chemically tempering the flat glass product obtained in step 3), using KNO3 as the molten salt;

[0137] Optional step 6): Coating one surface of the flat glass product obtained in step 3), step 4), or step 5) with an optical coating. The optical coating comprises an anti-reflection coating having a thickness of 600 nm. The composition and comprehensive performance results of the resulting flat glass are shown in Tables 3-4.

[0138] Table 3 shows the composition (unit: wt%) and properties of aluminosilicate glass-based flat glass of E13-17 and CE5-7:

[0139]

[0140] The above experimental results show that when a specific content of cerium oxide is added, the resulting aluminosilicate glass-based flat glass has excellent ultraviolet cutoff performance, visible light (400-760nm) transmittance, and at least one of mechanical properties. Compared with E14, the ultraviolet cutoff performance of the aluminosilicate glass-based flat glass in CE5, which is not doped with cerium oxide, is poor. The ultraviolet cutoff performance of the aluminosilicate glass-based flat glass in CE6, which has too low a cerium oxide content, is not significantly improved. The ultraviolet cutoff performance of CE7, which is doped only with titanium oxide, is not much different from that of CE5 (i.e., doping with titanium oxide alone has no effect on the ultraviolet cutoff performance). E13 contains an optical film layer, and its T 380nm 、T 400-500nm 、T 400-700nm Compared with the pre-coating levels, the increases were 4%, 5%, and 6%, respectively. Compared with E15, the fracture strength of E16 was significantly improved after chemical tempering.

[0141] Table 4 shows the composition (unit: wt%) and properties of aluminosilicate glass-based flat glass of E18-23 and CE8:

[0142]

[0143] Comparisons of E13-E17 and E18-23 show that adding a specific amount of TiO2 to cerium oxide further improves UV-cutting performance. Compared to E19, which incorporates only cerium oxide / titanium oxide, the UV-cutting performance of aluminosilicate glass-based flat glass obtained with E23, which incorporates an appropriate amount of iron oxide, is improved. It's important to note that the amount of iron oxide added should not be too high. While CE8 with excessive iron oxide exhibits excellent UV-cutting performance, its visible light transmittance is significantly reduced.

[0144] It should be noted that all technical features described in this application can be freely combined or combined in any way unless there is a contradiction between them. Various modifications and variations can be made to the present invention without departing from the scope of the present invention, which will be apparent to those skilled in the art. For example, a feature shown or described as part of one embodiment can be used together with another embodiment to produce another embodiment. Therefore, the present invention is intended to encompass these modifications and variations that fall within the scope of the appended claims and their equivalents.

Claims

1. A glass composition, characterized in that: The glass composition is an aluminosilicate glass-based composition or a soda-lime glass-based composition; In terms of weight percentage, the aluminosilicate glass-based composition comprises 10-30 wt % of Al2O3, >1 wt % and ≤10 wt % of CeO2; In terms of weight percentage, the soda-lime glass-based composition comprises 5-20 wt % of Na2O, 5-15 wt % of CaO, 1.0-10 wt % of CeO2, less than 3 wt % of Al2O3, and less than 0.1 wt % of P2O5.

2. The glass composition according to claim 1, wherein The aluminosilicate glass-based composition further comprises: TiO2 and / or Fe2O3, wherein the content of TiO2 is greater than 0 and ≤ 5 wt%, preferably 0.5 wt% to 5 wt%, and the content of Fe2O3 is greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%; and / or The aluminosilicate glass-based composition has a CeO2 content of 1.25 to 10 wt%, preferably 1.25 to 8 wt%, more preferably 1.25 to 6 wt%, and most preferably 1.5 to 5 wt%; Preferably, the mass ratio of TiO2 to CeO2 in the aluminosilicate glass-based composition is 0 to 2, preferably 0 to 1, more preferably 0 to 0.8, and most preferably 0.1 to 0.

6.

3. The glass composition according to claim 1, wherein The soda-lime glass-based composition further comprises: TiO2 and / or Fe2O3, wherein the content of TiO2 is greater than 0 and ≤ 5 wt%, preferably 0.5 wt% to 5 wt%, and the content of Fe2O3 is greater than 0 and ≤ 0.4 wt%, preferably greater than 0 and < 0.2 wt%; and / or The soda-lime glass-based composition has an Al2O3 content of 0.01 to 2 wt%, and / or a CeO2 content of 1.25 to 10 wt%, preferably 1.25 to 8 wt%, more preferably 1.25 to 6 wt%, and most preferably 1.5 to 5 wt%; Preferably, the mass ratio of TiO2 to CeO2 in the soda-lime glass matrix is ​​0-2, preferably 0-1, more preferably 0-0.8, and most preferably 0.1-0.

6.

4. The glass composition according to claim 1, wherein The aluminosilicate glass-based composition further comprises: SiO2 40-75wt%, B2O3 0-20wt%, K2O 0-6wt%, Li2O+Na2O+K2O=4-30wt%, MgO+CaO+SrO+BaO+ZnO=0-15wt%, TiO2 0-5wt%, Fe2O3 0-0.4; Preferably, the aluminosilicate glass-based composition comprises: SiO2 53-65wt%, Al2O3 12-25wt%, B2O3 0-8wt%, K2O 0-5wt%, Li2O+Na2O+K2O=10-20wt%, MgO+CaO+SrO+BaO+ZnO=2-6wt%, CeO2 1.25-6wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

5. The glass composition according to claim 1, wherein The soda-lime glass-based composition further comprises: SiO2 40-81 wt%, K2O 0-10 wt%, MgO 0-10 wt%, TiO2 0-5 wt%, Fe2O3 0-0.4 wt%; Preferably, the soda-lime glass-based composition comprises: SiO2 65-75wt%, Na2O 10-15wt%, CaO 7-10wt%, Al2O3 0.01-2wt%, K2O 0.1-6wt%, MgO 0-5wt%, CeO2 1.25-6wt%, TiO2 0-5wt%, and Fe2O3 0-<0.2wt%.

6. The glass composition according to claim 1, wherein The glass composition further comprises a clarifier, wherein the mass fraction of the clarifier does not exceed 0.5 wt %; And / or, the glass composition further comprises a fining agent and other inevitable impurities, and the total mass fraction of the fining agent and other inevitable impurities does not exceed 1.0 wt%; Preferably, the clarifier is selected from at least one of antimony pentoxide, tin dioxide, sulfate, chlorine compound, fluorine compound, arsenic trioxide, or a combination thereof.

7. The glass composition according to any one of claims 1 to 6, characterized in that The glass composition has one or more of the following characteristics: The transmittance of the glass composition at a wavelength of 340 nm measured by a spectrophotometer is ≤40 / t%, preferably ≤30 / t%, more preferably ≤15 / t%, and more preferably ≤5 / t%, where t is the thickness of the glass composition in millimeters; The transmittance of the glass composition at a wavelength of 360 nm measured by a spectrophotometer is ≤60 / t%, preferably ≤40 / t%, more preferably ≤20 / t%, and more preferably ≤10 / t%, where t is the thickness of the glass composition in millimeters; The transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-3*t%, preferably ≤90-8*t%, more preferably ≤90-15*t%, and more preferably ≤90-25*t%, where t is the thickness of the glass composition in millimeters; The average transmittance of the glass composition in the visible light band of 400 to 500 nm measured by a spectrophotometer is ≥60%, preferably ≥70%, more preferably ≥80%, and more preferably ≥85%; The average transmittance of the glass composition measured by a spectrophotometer in the visible light band of 400 to 700 nm is ≥80%, preferably ≥85%, and more preferably ≥88%.

8. The glass composition according to any one of claims 1 to 7, characterized in that The glass composition has a characteristic of reducing transmittance at a wavelength of 380 nm after being irradiated with sunlight or ultraviolet light; Preferably, the glass composition is subjected to sunlight irradiation treatment or ultraviolet irradiation treatment, and the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer decreases until it remains stable; More preferably, the glass composition having a stable transmittance at a wavelength of 380 nm is subjected to a second sunlight irradiation treatment or a second ultraviolet irradiation treatment, and the transmittance of the glass composition having a stable transmittance at a wavelength of 380 nm measured by a spectrophotometer decreases by less than 5%.

9. The glass composition according to any one of claims 1 to 7, characterized in that The glass composition has one or more of the following characteristics: After 15 kWh / m 2 After exposure to sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-12*t%, preferably ≤90-18*t%, more preferably ≤90-22*t%, and more preferably ≤90-27*t%, wherein t is the thickness of the glass composition in millimeters; After 45 kWh / m 2 After exposure to sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is ≤90-13*t%, preferably ≤90-19*t%, more preferably ≤90-23*t%, and more preferably ≤90-28*t%, wherein t is the thickness of the glass composition in millimeters; After 15 kWh / m 2 After irradiation with sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer decreases by more than 2.5*t%, preferably ≥3.3*t%, more preferably ≥5*t%, and most preferably >6.6*t%, compared to the transmittance at 380 nm before irradiation, where t is the thickness of the glass composition in millimeters; After 45 kWh / m 2 After irradiation with sunlight, the transmittance of the glass composition at a wavelength of 380 nm measured by a spectrophotometer is reduced by more than 3.3*t%, preferably ≥4*t%, more preferably ≥6*t%, and most preferably >8*t%, compared with the transmittance at 380 nm before irradiation, where t is the thickness of the glass composition in millimeters.

10. The method for producing a glass composition according to any one of claims 1 to 9, characterized in that: The manufacturing method comprises: weighing and mixing the raw materials required for the aluminosilicate glass-based composition or the soda-lime glass-based composition, and then melting and cooling to obtain the glass composition; Preferably, the glass composition is subjected to sunlight irradiation treatment or ultraviolet irradiation treatment; And / or, preferably, the obtained glass composition is subjected to a tempering treatment, wherein the tempering treatment is physical tempering or chemical tempering.

11. A flat glass, characterized in that: The flat glass is made of the glass composition according to any one of claims 1 to 9; preferably, the thickness of the flat glass is ≥0.1 mm, more preferably ≥0.5 mm, even more preferably ≥1 mm, further preferably ≥2 mm, and most preferably ≥3 mm.

12. The flat glass according to claim 11, wherein: The flat glass further comprises: an optical film layer and / or a conductive layer on at least one surface of the flat glass; Preferably, the optical film layer is selected from at least one or more layers of an anti-reflection film layer, a self-cleaning film layer, a dust-proof film layer, a wear-resistant film layer, and a light conversion film layer; Preferably, the conductive layer is a transparent conductive layer, more preferably at least one of fluorine-doped tin dioxide, indium tin oxide, and zinc oxide-based materials; Preferably, the thickness of each optical film layer on each surface of the flat glass does not exceed 1000 nm, and / or the thickness of the conductive layer does not exceed 1000 nm.

13. A method for manufacturing flat glass according to claim 11 or 12, characterized in that: The manufacturing method comprises: weighing and mixing the raw materials required for the aluminosilicate glass-based composition or the soda-lime glass-based composition, and then melting, forming and cooling to obtain the flat glass; Preferably, the forming method is selected from float method, down-draw method, overflow method, calendaring method or up-draw method.

14. The manufacturing method according to claim 13, characterized in that: Tempering the flat glass, wherein the tempering treatment is physical tempering or chemical tempering; and / or, subjecting the flat glass to sunlight exposure or ultraviolet light exposure; And / or, an optical film layer and / or a conductive layer is prepared on at least one surface of the flat glass.

15. Use of the glass composition according to any one of claims 1 to 9 or the flat glass according to claim 11 or 12 in the field of solar photovoltaics, characterized in that: The solar photovoltaic field preferably includes perovskite solar cells, heterojunction cells, and TOPCon cells.

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