Glass plate and preparation method thereof, tempered glass and electronic equipment

Abstract

The invention relates to a glass plate and a preparation method thereof, tempered glass and electronic equipment. The crystal phase of the glass plate comprises at least one of Y2Ti2O7, Y2Zr2O7, ZrO2 and LiAlSi2O6, the crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is larger than or equal to 82%. The glass plate provided by the embodiment of the invention has relatively strong strengthening capability.

Description

Technical Field

[0001] This application relates to the field of glass strengthening, specifically to a glass plate and its preparation method, strengthened glass, and electronic equipment. Background Technology

[0002] In recent years, high-performance transparent glass-ceramics have been applied to protective materials for smart products due to their combination of high transmittance and high strength. Currently, the high-performance glass-ceramics used in consumer electronics are lithium aluminum silicon glass (LAS) system glass-ceramics. This system has a high crystallinity, mainly composed of one or more nanoscale crystalline phases such as lithium feldspar, lithium disilicate, and spinel. However, the strengthening ability of LAS system glass-ceramics is not outstanding, and its performance needs improvement. Summary of the Invention

[0003] This application provides a glass plate with strong strengthening ability.

[0004] In a first aspect, embodiments of this application provide a glass plate, wherein the crystal phase of the glass plate includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6, the crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is greater than or equal to 82%.

[0005] Secondly, embodiments of this application also provide a glass plate, wherein the glass plate comprises, by mass fraction:

[0006] 40wt% to 65wt% SiO2;

[0007] 15wt% to 30wt% Al2O3;

[0008] 15wt% to 30wt% Y2O3;

[0009] 3wt% to 9wt% ZnO;

[0010] 2wt% to 7wt% Li2O;

[0011] 1 wt% to 4 wt% Na2O;

[0012] 0.5wt% to 3wt% TiO2;

[0013] 0.2wt% to 0.8wt% Sb2O3;

[0014] ZrO2; and

[0015] P2O5;

[0016] The mass ratio of ZrO2 to P2O5 ranges from 1 to 8.

[0017] Thirdly, embodiments of this application also provide a method for preparing a glass plate, the method comprising:

[0018] Provide glass powder;

[0019] Glass powder is shaped to obtain a glass substrate; and

[0020] The glass substrate is subjected to crystallization treatment to obtain a glass plate;

[0021] The glass plate has a crystal phase including at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6, and the crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is greater than or equal to 82%.

[0022] Fourthly, embodiments of this application also provide a reinforced glass, which is obtained by chemically strengthening the glass sheet described in the first or second aspect of this application.

[0023] Fifthly, embodiments of this application also provide an electronic device, which includes:

[0024] The display screen has a light-emitting surface;

[0025] The reinforced glass described in the fourth aspect of this application is disposed on the light-emitting surface of the display screen; and

[0026] A processor, electrically connected to the display screen, is used to control the display screen to perform a display.

[0027] This application provides a glass plate whose crystal phase includes at least one of Y₂Ti₂O₇, Y₂Zr₂O₇, ZrO₂, and LiAlSi₂O₆. The crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is greater than or equal to 82%. The Y₂Ti₂O₇, Y₂Zr₂O₇, ZrO₂, and LiAlSi₂O₆ crystal phases make the grains of the glass plate nearly spherical. Near-spherical grains can better hinder crack propagation, thereby giving the glass plate high fracture toughness and bending strength. In addition, the glass plate of this application has a suitable degree of crystallinity, which gives the glass plate high bending strength and fracture toughness, as well as high chemical strengthening ability. Furthermore, the light transmittance of the glass plate is greater than or equal to 82%, which has high light transmittance. When used as a protective cover for a display screen, it can make the display screen have a better display effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a glass plate according to an embodiment of this application.

[0030] Figure 2 This is a schematic flowchart of a method for preparing a glass plate according to an embodiment of this application.

[0031] Figure 3 This is a schematic flowchart of a method for preparing a glass substrate according to an embodiment of this application.

[0032] Figure 4 This is a schematic flowchart of the crystallization process of a glass substrate according to an embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the structure of a reinforced glass according to an embodiment of this application.

[0034] Figure 6 This is a schematic flowchart of a method for preparing reinforced glass according to an embodiment of this application.

[0035] Figure 7 These are physical images (a) and schematic diagrams (b) of the fracture toughness indentation of the reinforced glass in Example 1.

[0036] Figure 8 This is an X-ray diffraction pattern of the reinforced glass of Example 25.

[0037] Figure 9 This is a scanning electron microscope image of the reinforced glass of Example 25.

[0038] Figure 10 This is the X-ray diffraction pattern of the reinforced glass in Comparative Example 19.

[0039] Figure 11 This is a scanning electron microscope image of the reinforced glass in Comparative Example 19.

[0040] Figure 12 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0041] Figure 13 This is a partial exploded structural diagram of an electronic device according to an embodiment of this application.

[0042] Figure 14 This is a circuit block diagram of an electronic device according to an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100 - Glass plate, 300 - Tempered glass

[0045] 500 - Electronic device, 510 - Display screen, 511 - Light-emitting surface, 520 - Mid-frame, 530 - Processor, 540 - Housing, 550 - Memory, 570 - Camera module, 541 - Light-transmitting part. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0047] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0048] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0049] It should be noted that, for ease of explanation, the same reference numerals denote the same components in the embodiments of this application, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0050] Transparent microcrystalline glass is a special type of glass formed by crystallizing a specific matrix of glass at a certain temperature. This glass consists of nanoscale microcrystalline phases and amorphous glass phases.

[0051] In recent years, high-performance transparent glass-ceramics have been applied to protective materials for smart products due to their combination of high transmittance and high strength. Currently, the high-performance glass-ceramics used in consumer electronics are lithium aluminum silicon glass (LAS) system glass-ceramics. This system has a high crystallinity, mainly composed of one or more nanoscale crystalline phases such as lithium feldspar, lithium disilicate, and spinel. However, LAS system glass-ceramics have a high lithium content, leading to high raw material costs for lithium. Furthermore, the strengthening ability of LAS system glass-ceramics is not outstanding, and their fracture toughness is relatively low, indicating that their performance needs improvement.

[0052] Please see Figure 1 This application provides a glass plate 100. The crystal phase of the glass plate 100 includes at least one of Y2Ti2O7 (yttrium titanate), Y2Zr2O7 (yttrium zirconate), ZrO2 (zirconia), and LiAlSi2O6 (spodumene). The crystallinity of the glass plate 100 ranges from 30% to 40%, and the light transmittance of the glass plate 100 is greater than or equal to 82%.

[0053] The glass plate 100 in this application can be a microcrystalline glass plate 100. The glass plate 100 of this application can be applied to portable electronic devices such as mobile phones, tablets, laptops, desktop computers, smart bracelets, smartwatches, e-readers, and game consoles. The glass plate 100 in the embodiments of this application can serve as a protective cover for the display screen of an electronic device, a battery back cover of an electronic device, etc. In the accompanying drawings and the following description, the use of the glass plate 100 as a protective cover for the display screen of an electronic device is taken as an example and should not be construed as limiting the scope of the glass plate 100 in this application.

[0054] In the embodiments of this application, when the numerical range a to b is involved, unless otherwise specified, the numerical value can be any value between a and b, including the endpoint value a and the endpoint value b.

[0055] Understandably, the crystal phase of glass plate 100 can be one of Y2Ti2O7 (yttrium titanate), Y2Zr2O7 (yttrium zirconate), ZrO2 (zirconia), or LiAlSi2O6 (spodumene), or a composite crystal phase of at least two of them.

[0056] Specifically, the crystallinity of glass plate 100 can be, but is not limited to, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, and 40%. If the crystallinity of glass plate 100 is too low, its flexural strength and fracture toughness will be reduced; if the crystallinity of glass plate 100 is too high, the content of amorphous phase within glass plate 100 will be too low, reducing its chemical strengthening ability and affecting the flexural strength and fracture toughness of the strengthened glass plate 100. When the crystallinity of glass plate 100 is between 30% and 40%, it can achieve both high flexural strength and fracture toughness, as well as high chemical strengthening ability.

[0057] Understandably, the glass plate 100 contains 30% to 40% crystalline phase and 60% to 70% amorphous phase. Specifically, the content of amorphous phase in the glass plate 100 can be, but is not limited to, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, etc.

[0058] Optionally, the glass plate 100 of this application has near-spherical grains. Near-spherical grains hinder crack propagation and can better improve the fracture toughness and bending strength of the glass plate 100.

[0059] Optionally, the sphericity of the grains is greater than or equal to 0.7. Specifically, the sphericity of the grains can be, but is not limited to, greater than or equal to 0.7, greater than or equal to 0.73, greater than or equal to 0.75, greater than or equal to 0.78, greater than or equal to 0.8, greater than or equal to 0.83, greater than or equal to 0.85, greater than or equal to 0.88, greater than or equal to 0.9, greater than or equal to 0.93, greater than or equal to 0.95, greater than or equal to 0.97, greater than or equal to 0.99, etc. If the sphericity of the grains is too low, the grains' ability to prevent crack propagation is reduced; if the sphericity of the grains is too high, it becomes difficult to achieve in the manufacturing process. The glass plate 100 of this application has high sphericity of its grains, which has a better effect on preventing crack propagation, thereby improving the fracture toughness and bending strength of the glass.

[0060] The term "sphericity" refers to the sphericity of a grain when two circles are drawn with the minimum width of the grain as diameter d1 and the maximum width of the grain as diameter d2. The ratio of the diameters of the two circles, d1 / d2, is the value of the sphericity of the grain.

[0061] It should be noted that, in the embodiments of this application, unless otherwise specified, light transmittance refers to visible light transmittance.

[0062] Specifically, the light transmittance of the glass plate 100 can be, but is not limited to, greater than or equal to 82%, greater than or equal to 85%, greater than or equal to 88%, greater than or equal to 90%, greater than or equal to 91%, greater than or equal to 92%, greater than or equal to 95%, etc. The glass plate 100 of this embodiment has a high light transmittance.

[0063] In some embodiments, the light transmittance of the glass plate 100 with a thickness of 0.5 mm is 90.5% to 92%.

[0064] This application provides a glass plate 100. The crystal phase of the glass plate 100 includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6. The crystallinity of the glass plate 100 ranges from 30% to 40%, and the light transmittance of the glass plate 100 is greater than or equal to 82%. The Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6 crystal phases make the grains of the glass plate 100 nearly spherical. Near-spherical grains can better hinder crack propagation, thereby giving the glass plate 100 high fracture toughness and bending strength. In addition, the glass plate 100 of this application has a suitable degree of crystallinity, thereby giving the glass plate 100 high bending strength and fracture toughness, as well as high chemical strengthening ability. Furthermore, the light transmittance of the glass plate 100 is greater than or equal to 82%, which has high light transmittance. When used as a protective cover for a display screen, it can make the display screen have a better display effect.

[0065] In some embodiments, the grain size of the glass plate 100 is 16 nm to 30 nm.

[0066] It should be noted that the size of the grains in the glass plate 100 refers to the average length or average equivalent diameter of the grains.

[0067] Specifically, the size of the grains in the glass plate 100 can be, but is not limited to, 16nm, 18nm, 20nm, 22nm, 24nm, 26nm, 28nm, 30nm, etc.

[0068] In this embodiment, if the size of the grains in the glass plate 100 is too small, it will be difficult to achieve in terms of manufacturing process; if the size of the grains in the glass plate 100 is too large, it will reduce the light transmittance of the glass plate 100, making it difficult to use the glass plate 100 as a protective cover for the display screen.

[0069] In some embodiments, the glass plate 100 comprises, by mass fraction:

[0070] 40wt% to 65wt% SiO2 (silicon dioxide);

[0071] 15wt% to 30wt% Al2O3 (alumina);

[0072] 15wt% to 30wt% Y2O3 (yttrium oxide);

[0073] 3 wt% to 9 wt% ZnO (zinc oxide);

[0074] 2wt% to 7wt% Li₂O (lithium oxide);

[0075] 1 wt% to 4 wt% Na2O (sodium oxide);

[0076] 0.5wt% to 3wt% TiO2 (titanium oxide);

[0077] 0.2wt% to 0.8wt% Sb₂O₃ (antimony trioxide);

[0078] ZrO2 (zirconia); and

[0079] P2O5 (phosphorus pentoxide);

[0080] The mass ratio of ZrO2 to P2O5 ranges from 1 to 8.

[0081] Specifically, in the glass plate 100, the mass fraction of silicon dioxide can be, but is not limited to, 40wt%, 42wt%, 44wt%, 46wt%, 48wt%, 50wt%, 52wt%, 54wt%, 56wt%, 58wt%, 60wt%, 62wt%, 64wt%, 65wt%, etc. As a glass-forming agent in the glass plate 100, the content of SiO2 affects the glass's forming ability and chemical stability. If the SiO2 content in the glass plate 100 is too low, phase separation is likely to occur during the casting process, resulting in poor stability; if the SiO2 content in the glass plate 100 is too high, the melting temperature of the glass powder is high, clarification and homogenization are difficult, and crystal precipitation is also unfavorable.

[0082] Optionally, the source of SiO2 (i.e. the introduction source) includes one or more combinations of quartz sand, Na2SiO3 and H2SiO3.

[0083] Specifically, in the glass plate 100, the mass fraction of alumina can be, but is not limited to, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, etc. Al2O3 is a network intermediate in glass; it can be embedded in the glass network or located outside it. The content of Al2O3 not only affects the chemical stability of the glass plate 100 but also its crystallization ability and ion exchange capacity. When the Al2O3 content in glass plate 100 is too low, it not only makes it difficult for the glass plate 100 to form an Al-containing crystalline phase, resulting in low crystallinity, but also easily leads to abnormally large grains, reducing the light transmittance of the glass plate 100 and potentially causing glass devitrification. Furthermore, a low Al2O3 content is also detrimental to improving the elastic modulus of the glass plate 100, hindering ion exchange during chemical strengthening, and impeding the improvement of chemical strengthening stress. Conversely, when the Al2O3 content in glass plate 100 is too high, the melting of glass powder becomes difficult during the preparation process, significantly increasing the difficulty of the manufacturing process.

[0084] Optionally, the Al2O3 introduction source in the glass plate 100 includes at least one of aluminum oxide, aluminum hydroxide, aluminum nitrate, and aluminum fluoride.

[0085] Specifically, the mass fraction of yttrium oxide in glass plate 100 can be, but is not limited to, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, and 30 wt%. Y₂O₃ is the network exterior of the glass, and its content affects the mechanical properties, crystallization ability, and optical properties of glass plate 100. The presence of Y₂O₃ can not only increase the density of the glass network, but also, under specific heat treatment conditions, it can be doped into the crystals to form a crystalline solid solution. Higher network density and crystallinity are beneficial to improving the strength and modulus of glass plate 100. When the Y2O3 content in glass plate 100 is low, the improvement of the mechanical properties of glass plate 100 is not significant, and the elastic modulus and Vickers hardness of the strengthened glass plate 100 will be low; when the Y2O3 content in glass plate 100 is high, the crystallinity of glass plate 100 is increased, the light transmittance of glass plate 100 is reduced, and glass plate 100 may become devitrified.

[0086] Specifically, the mass fraction of zinc oxide (ZnO) in glass plate 100 can be, but is not limited to, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, etc. In the network structure of ZnO glass, the content of zinc oxide in glass plate 100 affects the glass's forming ability and optical properties. An appropriate amount of ZnO can not only effectively lower the melting temperature of the glass but also improve the alkali resistance of glass plate 100. If the zinc oxide content in glass plate 100 is too low, the promoting effect of zinc oxide on improving the glass's forming ability and optical properties, lowering the melting point, and improving alkali resistance will be insignificant. If the ZnO content in glass plate 100 is too high, Zn-containing crystals may precipitate, affecting the optical properties of glass plate 100.

[0087] Specifically, the mass fraction of lithium oxide (Li2O) in glass plate 100 can be, but is not limited to, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, and 7 wt%. Li2O is the network component of the glass, and the Li2O content in glass plate 100 affects the glass's forming ability, crystallization ability, and ion exchange capacity. When the Li2O content in glass plate 100 is too low, the glass's melting ability is poor, and it is difficult to obtain a deep stress layer; when the Li2O content in glass plate 100 is too high, the integrity of the glass network decreases, the chemical stability deteriorates, and crystallization is difficult to control, easily producing abnormally large grains or crystalline phases with high refractive index, which is not conducive to improving the transmittance of glass plate 100. When the mass fraction of Li2O in the glass plate 100 is 2wt% to 7wt%, the glass plate 100 can have good melting ability, a deep stress layer during strengthening, and high light transmittance.

[0088] Optionally, the source of Li2O (introduced source) includes one or more combinations of Li3PO4, Li2CO3 and LiOH.

[0089] Specifically, the mass fraction of sodium oxide in glass plate 100 can be, but is not limited to, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, etc. Na₂O is the network component of the glass, and the sodium oxide content in glass plate 100 affects the glass's forming ability, crystallization ability, chemical stability, and ion exchange capacity. When the Na₂O content in glass plate 100 is low, not only is the glass's melting ability low, but the stress value and stress layer depth after strengthening are also low, which is detrimental to improving the mechanical strength of glass plate 100. When the Na₂O content in glass plate 100 is too high, crystallization of glass plate 100 becomes difficult, and chemical stability decreases.

[0090] Optionally, the source of Na2O includes at least one of Na2CO3, NaOH, Na2SiO3 and NaHCO3.

[0091] Specifically, the mass fraction of titanium oxide in glass plate 100 can be, but is not limited to, 0.5 wt%, 0.8 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, etc. TiO2 is the network matrix of glass, and adding a small amount of TiO2 to glass plate 100 is beneficial for promoting glass melting and improving the chemical stability of the glass. However, if the TiO2 content in glass plate 100 is too high, the crystallization process of glass plate 100 will be difficult to control during crystallization treatment, and may also result in a yellow color, reducing the light transmittance of glass plate 100 and affecting its appearance. When the mass fraction of titanium oxide in glass plate 100 is between 0.5 wt% and 3 wt%, it can better promote glass melting and improve the chemical stability of glass during preparation, and can also better control the crystallization process of glass plate 100.

[0092] Specifically, the mass fraction of antimony trioxide in glass plate 100 can be, but is not limited to, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, etc. Antimony trioxide in glass plate 100 acts as a clarifying agent, primarily removing impurities and bubbles generated during the glass plate 100 formation process through a redox cycle, thus ensuring the optical properties of glass plate 100 itself. When the antimony trioxide content in glass plate 100 is too high, it will alter the color of glass plate 100, reduce its light transmittance, and may even cause the glass to become opaque.

[0093] Specifically, the mass ratio of ZrO2 to P2O5 in the glass plate 100 can be, but is not limited to, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, etc.

[0094] In glass plate 100, ZrO2, TiO2, and P2O5 act as nucleating agents, promoting heterogeneous nucleation of the glass. Their content affects the glass's crystallization ability and chemical stability. ZrO2 is the network exosome of the glass, and its content in glass plate 100 influences the glass's forming ability, crystallization ability, and chemical stability. The nucleation mechanism of ZrO2 involves inducing the formation of Zr-rich and Zr-poor regions in the glass matrix, forming a core-shell structure based on this, and finally growing into nanocrystals. Therefore, a small amount of ZrO2 in glass plate 100 facilitates control of the crystallization process, resulting in uniformly distributed and fine grains. Furthermore, a small amount of ZrO2 in glass plate 100 is beneficial for improving the chemical stability of glass plate 100. When the ZrO2 content in glass plate 100 is too high, it not only hinders glass melting but may also cause ZrO2 to precipitate in glass plate 100, reducing the light transmittance of glass plate 100 or even leading to glass devitrification. P2O5 is typically used in conjunction with ZrO2 as a composite nucleating agent. The P2O5 content in glass plate 100 affects the glass's forming and crystallization abilities. The nucleation mechanism of P2O5 involves inducing the formation of P-rich and P-poor regions in the glass matrix, forming a core-shell structure that eventually grows into nanocrystals. When the P2O5 content in glass plate 100 is too low, crystallization is difficult, reducing the crystallinity of glass plate 100 and thus decreasing its flexural strength and fracture toughness. Conversely, when the P2O5 content in glass plate 100 is high, the crystallization process becomes difficult to control, reducing the light transmittance and making it prone to devitrification.

[0095] In this embodiment, if the mass ratio of ZrO2 to P2O5 in the glass plate 100 is too small, the glass plate 100 is prone to phase separation and crystallization during the crystallization heat treatment process, making the crystallization process difficult to control and deteriorating the optical performance of the glass plate 100. If the mass ratio of ZrO2 to P2O5 in the glass plate 100 is too large, the solubility of ZrO2 in the glass will be poor, and unmelted ZrO2 will easily appear in the glass melt, causing melt defects, reducing the light transmittance of the glass plate 100, or even causing the glass to devitrify.

[0096] Furthermore, in the glass plate 100, the mass ratio of ZrO2 to P2O5 ranges from 1.5 to 8. This allows the glass plate 100 to have better crystallization ability during the preparation process, and the crystallization process is easier to control, resulting in the glass plate 100 having higher bending strength, higher fracture toughness, and higher light transmittance.

[0097] In some embodiments, the mass fraction of ZrO2 in the glass plate 100 ranges from 2 wt% to 6 wt%; and the mass fraction of P2O5 ranges from 0.5 wt% to 3 wt%.

[0098] Specifically, the mass fraction of ZrO2 in the glass plate 100 can be, but is not limited to, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, etc. Therefore, a small amount of ZrO2 in the glass plate 100 facilitates control of the crystallization process, resulting in uniformly distributed and fine grains. Furthermore, a small amount of ZrO2 in the glass plate 100 is beneficial for improving the chemical stability of the glass plate 100. When the mass fraction of ZrO2 in the glass plate 100 is too small, its effect on uniformity and grain refinement is not significant, and its improvement on the chemical stability of the glass is not significant. When the ZrO2 content in the glass plate 100 is too high, it is not only detrimental to the melting of the glass, but may also cause ZrO2 to precipitate in the glass plate 100, reducing the light transmittance of the glass plate 100 or even leading to glass devitrification.

[0099] Specifically, the mass fraction of P2O5 in glass plate 100 can be, but is not limited to, 0.5wt%, 0.8wt%, 1.0wt%, 1.2wt%, 1.4wt%, 1.6wt%, 1.8wt%, 2wt%, 2.2wt%, 2.4wt%, 2.6wt%, 2.8wt%, and 3wt%. When the P2O5 content in glass plate 100 is too low, it makes glass crystallization more difficult, reducing the crystallinity of glass plate 100 and thus reducing its bending strength and fracture toughness. When the P2O5 content in glass plate 100 is high, the crystallization process of glass plate 100 is difficult to control, reducing the light transmittance of glass plate 100 and making it prone to devitrification.

[0100] In this embodiment, by controlling the mass fractions of ZrO2 and P2O5 in the glass plate 100 within a reasonable range, the glass plate 100 can have better crystallization ability during the preparation process, and the crystallization process is easier to control, so that the glass plate 100 has higher bending strength, higher fracture toughness and higher light transmittance.

[0101] In one specific embodiment, the glass plate 100 comprises, by mass fraction:

[0102] 40wt% to 65wt% SiO2, 15wt% to 30wt% Al2O3, 15wt% to 30wt% Y2O3, 3wt% to 9wt% ZnO, 2wt% to 7wt% Li2O, 1wt% to 4wt% Na2O, 0.5wt% to 3wt% TiO2, 0.2wt% to 0.8wt% Sb2O3, 2wt% to 6wt% ZrO2, and 0.5wt% to 3wt% P2O5.

[0103] In some embodiments, the glass plate 100 comprises, by mass fraction:

[0104] 40wt% to 55wt% SiO2;

[0105] 20wt% to 30wt% Al2O3;

[0106] 20wt% to 30wt% Y2O3;

[0107] 4wt% to 8wt% ZnO;

[0108] 3wt% to 5wt% Li2O;

[0109] 1.5wt% to 3.5wt% Na2O;

[0110] 3wt% to 6wt% ZrO2;

[0111] 0.5wt% to 2wt% TiO2;

[0112] 0.5wt% to 2wt% P2O5; and

[0113] 0.3wt% to 0.5wt% Sb2O3.

[0114] In this embodiment, by designing the components of SiO2, Al2O3, Y2O3, ZnO, Li2O, Na2O, ZrO2, TiO2, P2O5 and Sb2O3 in the glass plate 100, the glass plate 100 has good transparency and good strengthening ability. After strengthening, it has high bending strength and fracture toughness.

[0115] In some embodiments, the glass plate 100 further includes K2O (potassium oxide), wherein the total mass fraction of K2O and Na2O in the glass plate 100 is less than the mass fraction of Li2O. K2O is an external network component of the glass; when its content in the glass plate 100 is low, the glass's melting capacity and ion exchange capacity are poor; when the potassium oxide content in the glass plate 100 is high, the chemical stability and weather resistance of the glass plate 100 are poor. Furthermore, the use of K2O instead of Na2O in combination can exert a "mixed alkali effect," achieving superior overall performance compared to using K2O or Na2O alone.

[0116] If the total content of K₂O and Na₂O in glass plate 100 is greater than the content of Li₂O in glass plate 100, it will not only deteriorate the crystallinity of the glass, but also hinder the achievement of a deeper stress distribution during chemical strengthening of glass plate 100. The reason for the deterioration of the crystallinity of glass plate 100 lies in the Li₂O content. +Li has a greater aggregation capacity, making it easier for the glass to undergo phase separation and crystallization. Li itself diffuses more easily in the glass plate 100, so a higher Li content can form a deeper stress layer. Therefore, when the mass fraction of K2O and Na2O in the glass plate 100 is less than the mass fraction of Li2O, the glass plate 100 can have better crystallization ability, resulting in a deeper stress distribution during chemical strengthening of the glass plate 100. This leads to higher mechanical strength and higher fracture toughness in the strengthened glass plate 100.

[0117] Optionally, the source (introduced source) of K2O includes at least one of K2CO3, KOH, K2SiO3 and KHCO3.

[0118] In some embodiments, the mass ratio of K₂O to Na₂O in the glass plate 100 ranges from 1 / 8 to 1 / 2. In other words, the mass ratio of potassium oxide to sodium oxide ranges from 1 / 8 to 1 / 2.

[0119] Specifically, in the glass plate 100, the mass ratio of K2O to Na2O can be, but is not limited to, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc. If the mass ratio of K2O to Na2O in the glass plate 100 is too low, the risk of crystallization in the glass melt increases during the preparation of the glass plate 100, resulting in excessively high crystallinity and reduced chemical strengthening ability. Conversely, if the mass ratio of K2O to Na2O in the glass plate 100 is too high, the Na2O content in the glass plate 100 is relatively low, and when the glass plate 100 is chemically strengthened in the strengthening salt, the K2O content in the strengthening salt will be reduced. + Na in glass plate 100 + Insufficient ion exchange capacity reduces the strengthening performance of glass plate 100. A mass ratio of K2O to Na2O of 1 / 8 to 1 / 2 can effectively improve the melt crystallization phenomenon during the preparation of glass plate 100 and enhance its ion exchange performance.

[0120] In some embodiments, the mass fraction of K2O in the glass plate 100 is less than or equal to 2 wt%.

[0121] Specifically, in the glass plate 100, the mass fraction of K2O can be, but is not limited to, 0.1wt%, 0.3wt%, 0.5wt%, 1wt%, 1.3wt%, 1.5wt%, 1.8wt%, 2wt%, etc.

[0122] In this embodiment, if the mass fraction of K2O in the glass plate 100 is too low, the glass's melting ability and ion exchange ability will be poor, and it will be difficult to exert a "mixed alkali effect" with Na2O. If the potassium oxide content in the glass plate 100 is high, the chemical stability and weather resistance of the glass plate 100 will be poor. In addition, if the potassium oxide content in the glass plate 100 is too high, it will not be conducive to the chemical strengthening of the glass plate 100.

[0123] Furthermore, in the glass plate 100, the mass fraction of K2O is 0.5wt% to 1.5wt%. This allows the glass to have good melting and ion exchange capabilities, as well as good chemical stability, enabling it to better exert the mixed alkali effect with sodium oxide without affecting the chemical strengthening of the glass plate 100.

[0124] In one specific example, the glass plate 100 comprises 40 wt% to 65 wt% SiO2, 15 wt% to 30 wt% Al2O3, 15 wt% to 30 wt% Y2O3, 3 wt% to 9 wt% ZnO, 2 wt% to 7 wt% Li2O, 1 wt% to 4 wt% Na2O, 0.5 wt% to 3 wt% TiO2, 0.2 wt% to 0.8 wt% Sb2O3, 2 wt% to 6 wt% ZrO2, 0.5 wt% to 3 wt% P2O5, and less than or equal to 2 wt% K2O.

[0125] In another specific example, the glass plate 100 comprises 40 wt% to 55 wt% SiO2, 20 wt% to 30 wt% Al2O3, 20 wt% to 30 wt% Y2O3, 4 wt% to 8 wt% ZnO, 3 wt% to 5 wt% Li2O, 1.5 wt% to 3.5 wt% Na2O, 3 wt% to 6 wt% ZrO2, 0.5 wt% to 2 wt% TiO2, 0.5 wt% to 2 wt% P2O5, 0.3 wt% to 0.5 wt% Sb2O3, and 0.5 wt% to 1.5 wt% K2O.

[0126] In some embodiments, the glass plate 100 further includes B2O3, wherein the mass fraction of B2O3 in the glass plate 100 is less than or equal to 3 wt%.

[0127] Specifically, the mass fraction of B2O3 in the glass plate 100 can be, but is not limited to, 0%, 0.3wt%, 0.5wt%, 0.8wt%, 1.0wt%, 1.3wt%, 1.5wt%, 1.8wt%, 2.0wt%, 2.2wt%, 2.5wt%, 2.8wt%, 3.0wt%, etc.

[0128] Optionally, the source of boron oxide introduction includes at least one of borax and sodium-containing boron oxides.

[0129] B2O3 is a network forger in glass, forming triangular and tetrahedral structures in glass plate 100, thus providing excellent fluxing properties. The B2O3 content in glass plate 100 affects the chemical stability and glass-forming ability of the glass. If the B2O3 content in glass plate 100 is too low, it is detrimental to improving the glass's melting capacity; if the B2O3 content is too high, the molten glass is prone to volatilization, leading to uneven glass composition and negatively impacting the chemical stability of glass plate 100.

[0130] Furthermore, in the glass plate 100, the mass fraction of B2O3 is 0.5wt% to 2wt%. This allows the glass plate 100 to have better chemical stability and better melting ability during preparation.

[0131] In one specific example, the glass plate 100 comprises 40 wt% to 65 wt% SiO2, 15 wt% to 30 wt% Al2O3, 15 wt% to 30 wt% Y2O3, 3 wt% to 9 wt% ZnO, 2 wt% to 7 wt% Li2O, 1 wt% to 4 wt% Na2O, 0.5 wt% to 3 wt% TiO2, 0.2 wt% to 0.8 wt% Sb2O3, 2 wt% to 6 wt% ZrO2, 0.5 wt% to 3 wt% P2O5, less than or equal to 2 wt% K2O, and less than or equal to 3 wt% B2O3.

[0132] In another specific example, the glass plate 100 comprises 40 wt% to 55 wt% SiO2, 20 wt% to 30 wt% Al2O3, 20 wt% to 30 wt% Y2O3, 4 wt% to 8 wt% ZnO, 3 wt% to 5 wt% Li2O, 1.5 wt% to 3.5 wt% Na2O, 3 wt% to 6 wt% ZrO2, 0.5 wt% to 2 wt% TiO2, 0.5 wt% to 2 wt% P2O5, 0.3 wt% to 0.5 wt% Sb2O3, 0.5 wt% to 1.5 wt% K2O, and 0.5 wt% to 2 wt% B2O3.

[0133] This application embodiment also provides a glass plate 100, which comprises, by mass fraction:

[0134] 40wt% to 65wt% SiO2;

[0135] 15wt% to 30wt% Al2O3;

[0136] 15wt% to 30wt% Y2O3;

[0137] 3wt% to 9wt% ZnO;

[0138] 2wt% to 7wt% Li2O;

[0139] 1 wt% to 4 wt% Na2O;

[0140] 0.5wt% to 3wt% TiO2;

[0141] 0.2wt% to 0.8wt% Sb2O3;

[0142] ZrO2; and

[0143] P2O5;

[0144] The mass ratio of ZrO2 to P2O5 ranges from 1 to 8.

[0145] As a glass forging agent in glass plate 100, the content of SiO2 affects the glass's forming ability and chemical stability. If the SiO2 content in glass plate 100 is too low, phase separation is likely to occur during the casting process, resulting in poor stability. If the SiO2 content in glass plate 100 is too high, the melting temperature of the glass powder will be high, making clarification and homogenization difficult, and it will also be unfavorable for crystal precipitation.

[0146] Al₂O₃ is a network intermediate in glass. It can be embedded within the glass network or located outside it. The Al₂O₃ content affects not only the chemical stability of the glass plate 100 but also its crystallization and ion exchange capabilities. When the Al₂O₃ content in the glass plate 100 is too low, it becomes difficult to form an Al-containing crystalline phase, resulting in low crystallinity and an increased likelihood of abnormally large grains, reducing light transmittance and potentially causing devitrification. Furthermore, a low Al₂O₃ content is detrimental to improving the elastic modulus of the glass plate 100, hindering ion exchange during chemical strengthening, and impeding the enhancement of chemical strengthening stress. Conversely, when the Al₂O₃ content in the glass plate 100 is too high, melting the glass powder becomes difficult during preparation, significantly increasing the complexity of the manufacturing process.

[0147] Y₂O₃ is the network component of glass, and its content affects the mechanical properties, crystallinity, and optical properties of glass plate 100. The presence of Y₂O₃ not only increases the density of the glass network but can also be doped into the crystals under specific heat treatment conditions to form a crystalline solid solution. Higher network density and crystallinity are beneficial for improving the strength and modulus of glass plate 100. When the Y₂O₃ content in glass plate 100 is low, the improvement in its mechanical properties is not significant; when the Y₂O₃ content in glass plate 100 is high, it increases the crystallinity of glass plate 100, reduces its light transmittance, and may cause the glass plate 100 to become devitrified.

[0148] In the ZnO glass network body, within glass plate 100, the zinc oxide content affects the glass's forming ability and optical properties. An appropriate amount of ZnO can effectively lower the glass's melting temperature and improve the alkali resistance of glass plate 100. If the zinc oxide content in glass plate 100 is too low, its promoting effect on improving glass forming ability and optical properties, lowering the melting point, and improving alkali resistance is not significant. If the ZnO content in glass plate 100 is too high, Zn-containing crystals may precipitate, affecting the optical properties of glass plate 100.

[0149] Li₂O is the network component of glass, and its content in glass plate 100 affects the glass's forming ability, crystallization ability, and ion exchange capacity. When the Li₂O content in glass plate 100 is too low, the glass's melting ability is poor, and it is difficult to obtain a deep stress layer. When the Li₂O content in glass plate 100 is too high, the integrity of the glass network decreases, its chemical stability deteriorates, and crystallization is difficult to control, easily producing abnormally large grains or crystalline phases with high refractive indices, which is detrimental to improving the transmittance of glass plate 100. When the mass fraction of Li₂O in glass plate 100 is between 2 wt% and 7 wt%, the glass plate 100 can have good melting ability, a deep stress layer during strengthening, and high light transmittance.

[0150] Na₂O is the network component of glass. The sodium oxide content in glass plate 100 affects the glass's forming ability, crystallization ability, chemical stability, and ion exchange capacity. When the Na₂O content in glass plate 100 is low, not only is the glass's melting ability low, but the stress value and stress layer depth after strengthening are also low, which is not conducive to improving the mechanical strength of glass plate 100. When the Na₂O content in glass plate 100 is too high, crystallization of glass plate 100 becomes difficult, and chemical stability decreases.

[0151] TiO2 is the outer network component of glass. Adding a small amount of TiO2 to glass plate 100 is beneficial for promoting glass melting and improving its chemical stability. However, if the TiO2 content in glass plate 100 is too high, the crystallization process during crystallization treatment will be difficult to control, and it may also result in a yellow color, reducing the light transmittance of glass plate 100 and affecting its appearance. When the mass fraction of titanium dioxide in glass plate 100 is between 0.5 wt% and 3 wt%, it can better promote glass melting and improve the chemical stability of glass during preparation, and also better control the crystallization process of glass plate 100.

[0152] Antimony trioxide in glass plate 100 acts as a clarifying agent, primarily functioning to remove impurities and bubbles generated during the glass plate 100 formation process through a redox cycle, thereby ensuring the optical properties of glass plate 100 itself. When the antimony trioxide content in glass plate 100 is too high, it will alter the color of glass plate 100, reduce its light transmittance, and may even cause the glass to become opaque.

[0153] In glass plate 100, ZrO2, TiO2, and P2O5 act as nucleating agents, promoting heterogeneous nucleation of the glass. Their content affects the glass's crystallization ability and chemical stability. ZrO2 is the network exosome of the glass, and its content in glass plate 100 influences the glass's forming ability, crystallization ability, and chemical stability. The nucleation mechanism of ZrO2 involves inducing the formation of Zr-rich and Zr-poor regions in the glass matrix, forming a core-shell structure based on this, and finally growing into nanocrystals. Therefore, a small amount of ZrO2 in glass plate 100 facilitates control of the crystallization process, resulting in uniformly distributed and fine grains. Furthermore, a small amount of ZrO2 in glass plate 100 is beneficial for improving the chemical stability of glass plate 100. When the ZrO2 content in glass plate 100 is too high, it not only hinders glass melting but may also cause ZrO2 to precipitate in glass plate 100, reducing the light transmittance of glass plate 100 or even leading to glass devitrification. P2O5 is typically used in conjunction with ZrO2 as a composite nucleating agent. The P2O5 content in glass plate 100 affects the glass's forming and crystallization abilities. The nucleation mechanism of P2O5 involves inducing the formation of P-rich and P-poor regions in the glass matrix, forming a core-shell structure that eventually grows into nanocrystals. When the P2O5 content in glass plate 100 is too low, crystallization is difficult, reducing the crystallinity of glass plate 100 and thus decreasing its flexural strength and fracture toughness. Conversely, when the P2O5 content in glass plate 100 is high, the crystallization process becomes difficult to control, reducing the light transmittance and making it prone to devitrification.

[0154] For a detailed description of the glass plate 100, SiO2, Al2O3, Y2O3, ZnO, Li2O, Na2O, ZrO2, TiO2, P2O5, and Sb2O3, please refer to the descriptions in the corresponding sections of the above embodiments, which will not be repeated here.

[0155] In this embodiment, by designing the components of SiO2, Al2O3, Y2O3, ZnO, Li2O, Na2O, ZrO2, TiO2, P2O5 and Sb2O3 in the glass plate 100, the glass plate 100 has good transparency and good strengthening ability. After strengthening, it has high bending strength and fracture toughness.

[0156] In some embodiments, the mass fraction of ZrO2 ranges from 2 wt% to 6 wt%; the mass fraction of P2O5 ranges from 0.5 wt% to 3 wt%.

[0157] For descriptions of the same features as those described above, please refer to the corresponding descriptions in the above embodiments; they will not be repeated here.

[0158] In this embodiment, by controlling the mass fractions of ZrO2 and P2O5 in the glass plate 100 within a reasonable range, the glass plate 100 can have better crystallization ability during the preparation process, and the crystallization process is easier to control, so that the glass plate 100 has higher bending strength, higher fracture toughness and higher light transmittance.

[0159] In some embodiments, the glass plate 100 comprises, by mass fraction:

[0160] 40wt% to 55wt% SiO2;

[0161] 20wt% to 30wt% Al2O3;

[0162] 20wt% to 30wt% Y2O3;

[0163] 4wt% to 8wt% ZnO;

[0164] 3wt% to 5wt% Li2O;

[0165] 1.5wt% to 3.5wt% Na2O;

[0166] 3wt% to 6wt% ZrO2;

[0167] 0.5wt% to 2wt% TiO2;

[0168] 0.5wt% to 2wt% P2O5; and

[0169] 0.3wt% to 0.5wt% Sb2O3.

[0170] In this embodiment, by designing the components of SiO2, Al2O3, Y2O3, ZnO, Li2O, Na2O, ZrO2, TiO2, P2O5 and Sb2O3 in the glass plate 100, the glass plate 100 has good transparency and good strengthening ability. After strengthening, it has high bending strength and fracture toughness.

[0171] In some embodiments, the glass plate 100 further includes K2O, wherein the total mass fraction of K2O and Na2O in the glass plate 100 is less than the mass fraction of Li2O. K2O is an external network component of the glass; when its content in the glass plate 100 is low, the glass's melting capacity and ion exchange capacity are poor. When the potassium oxide content in the glass plate 100 is high, the chemical stability and weather resistance of the glass plate 100 are poor. Furthermore, the use of K2O instead of Na2O in combination can exert a "mixed alkali effect," achieving superior overall performance compared to using K2O or Na2O alone.

[0172] If the total content of K₂O and Na₂O in glass plate 100 is greater than the content of Li₂O in glass plate 100, it will not only deteriorate the crystallinity of the glass, but also hinder the achievement of a deeper stress distribution during chemical strengthening of glass plate 100. The reason for the deterioration of the crystallinity of glass plate 100 lies in the Li₂O content. + Li has a greater aggregation capacity, making it easier for the glass to undergo phase separation and crystallization. Li itself diffuses more easily in the glass plate 100, so a higher Li content can form a deeper stress layer. Therefore, when the mass fraction of K2O and Na2O in the glass plate 100 is less than the mass fraction of Li2O, the glass plate 100 can have better crystallization ability, resulting in a deeper stress distribution during chemical strengthening of the glass plate 100. This leads to higher mechanical strength and higher fracture toughness in the strengthened glass plate 100.

[0173] For descriptions of the same features as those described above, please refer to the corresponding descriptions in the above embodiments; they will not be repeated here.

[0174] In some embodiments, the mass ratio of K2O to Na2O in the glass plate 100 ranges from 1 / 8 to 1 / 2.

[0175] For descriptions of the same features as those described above, please refer to the corresponding descriptions in the above embodiments; they will not be repeated here.

[0176] If the mass ratio of K2O to Na2O in the glass plate 100 is too low, the risk of crystallization in the glass melt during preparation increases, resulting in excessively high crystallinity and reduced chemical strengthening ability of the glass plate 100. Conversely, if the mass ratio of K2O to Na2O in the glass plate 100 is too high, the Na2O content in the glass plate 100 is relatively low. Therefore, when the glass plate 100 undergoes chemical strengthening in the strengthening salt, the K2O content in the strengthening salt... + Na in glass plate 100 + The insufficient exchange rate reduces the strengthening performance of glass plate 100.

[0177] In some embodiments, the mass fraction of K2O in the glass plate 100 is less than or equal to 2 wt%.

[0178] For descriptions of the same features as those described above, please refer to the corresponding descriptions in the above embodiments; they will not be repeated here.

[0179] In this embodiment, if the mass fraction of K2O in the glass plate 100 is too low, the glass's melting ability and ion exchange ability will be poor, and it will be difficult to exert a "mixed alkali effect" with Na2O. If the potassium oxide content in the glass plate 100 is high, the chemical stability and weather resistance of the glass plate 100 will be poor. In addition, if the potassium oxide content in the glass plate 100 is too high, it will not be conducive to the chemical strengthening of the glass plate 100.

[0180] In some embodiments, the glass plate 100 further includes B2O3, wherein the mass fraction of B2O3 in the glass plate 100 is less than or equal to 3 wt%.

[0181] B2O3 is a network forger in glass, forming triangular and tetrahedral structures in glass plate 100, thus providing excellent fluxing properties. The B2O3 content in glass plate 100 affects the chemical stability and glass-forming ability of the glass. If the B2O3 content in glass plate 100 is too low, it is detrimental to improving the glass's melting capacity; if the B2O3 content is too high, the molten glass is prone to volatilization, leading to uneven glass composition and negatively impacting the chemical stability of glass plate 100.

[0182] In some embodiments, the glass plate 100 satisfies at least one of the following conditions:

[0183] The crystal phase of the glass plate 100 includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6;

[0184] The crystallinity of the glass plate 100 ranges from 30% to 40%.

[0185] The grain size of the glass plate 100 is 16 nm to 30 nm; and

[0186] The light transmittance of the glass plate 100 is greater than or equal to 82%.

[0187] The glass plate 100 of this application embodiment has a crystal phase including at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6. The crystallinity of the glass plate 100 ranges from 30% to 40%, and the light transmittance of the glass plate 100 is greater than or equal to 82%. The Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6 crystal phases make the grains of the glass plate 100 nearly spherical. Near-spherical grains can better hinder crack propagation, thereby giving the glass plate 100 high fracture toughness and bending strength. In addition, the glass plate 100 of this application has a suitable crystallinity, thereby giving the glass plate 100 high bending strength and fracture toughness, as well as high chemical strengthening ability. Furthermore, the light transmittance of the glass plate 100 is greater than or equal to 82%, which has high light transmittance. When used as a protective cover for a display screen, it can make the display screen have a better display effect.

[0188] Optionally, the sphericity of the grains is greater than or equal to 0.7. Specifically, the sphericity of the grains can be, but is not limited to, greater than or equal to 0.7, greater than or equal to 0.73, greater than or equal to 0.75, greater than or equal to 0.78, greater than or equal to 0.8, greater than or equal to 0.83, greater than or equal to 0.85, greater than or equal to 0.88, greater than or equal to 0.9, greater than or equal to 0.93, greater than or equal to 0.95, greater than or equal to 0.97, greater than or equal to 0.99, etc. If the sphericity of the grains is too low, the grains' ability to prevent crack propagation is reduced; if the sphericity of the grains is too high, it becomes difficult to achieve in the manufacturing process. The glass plate 100 of this application has high sphericity of its grains, which has a better effect on preventing crack propagation, thereby improving the fracture toughness and bending strength of the glass.

[0189] Please see Figure 2 This application also provides a method for preparing a glass plate 100, the method comprising:

[0190] S201 provides glass powder;

[0191] Optionally, the introductory sources of each component are provided according to a preset proportion and uniformly mixed in a drum ball mill to obtain glass powder. For example, SiO2 introductory sources, Al2O3 introductory sources, Y2O3 introductory sources, ZnO introductory sources, Li2O introductory sources, Na2O introductory sources, ZrO2 introductory sources, TiO2 introductory sources, P2O5 introductory sources, and Sb2O3 introductory sources are mixed in a preset proportion.

[0192] S202, the glass powder is molded to obtain a glass substrate; and

[0193] Optionally, the glass powder is placed in a platinum-rhodium crucible (Pt-Rh crucible) for melting and homogenization, and then shaped to obtain a glass substrate.

[0194] S203, the glass substrate is subjected to crystallization treatment to obtain glass plate 100.

[0195] The glass plate 100 has a crystal phase including at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6, and the crystallinity of the glass plate 100 ranges from 30% to 40%, and the light transmittance of the glass plate 100 is greater than or equal to 82%.

[0196] For descriptions of features identical to those in the above embodiments in other directions, such as glass plate 100, please refer to the descriptions of the corresponding parts of the above embodiments, which will not be repeated here.

[0197] This application provides a glass plate 100. The crystal phase of the glass plate 100 includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6. The crystallinity of the glass plate 100 ranges from 30% to 40%, and the light transmittance of the glass plate 100 is greater than or equal to 82%. The Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6 crystal phases make the grains of the glass plate 100 nearly spherical. Near-spherical grains can better hinder crack propagation, thereby giving the glass plate 100 high fracture toughness and bending strength. In addition, the glass plate 100 of this application has a suitable degree of crystallinity, thereby giving the glass plate 100 high bending strength and fracture toughness, as well as high chemical strengthening ability. Furthermore, the light transmittance of the glass plate 100 is greater than or equal to 82%, which has high light transmittance. When used as a protective cover for a display screen, it can make the display screen have a better display effect.

[0198] Please see Figure 3 In some embodiments, in S202, the step of molding the glass powder to obtain a glass substrate includes:

[0199] S2021, The glass powder is melted at a temperature of 1500°C to 1600°C to obtain molten glass;

[0200] Optionally, the glass powder is placed in a platinum-rhodium crucible (Pt-Rh crucible) for melting and homogenization to obtain molten glass.

[0201] Specifically, the melting temperature can be, but is not limited to, 1500℃, 1520℃, 1540℃, 1560℃, 1580℃, 1600℃, etc. If the melting temperature is too low, some of the glass powder may not be completely dissolved, resulting in unmelted particles remaining in the glass powder, which affects the mechanical properties and light transmittance of the resulting glass plate 100. If the melting temperature is too high, the sodium oxide and lithium oxide sources in the glass powder are prone to decomposition and volatilization, resulting in a significant difference between the sodium oxide and lithium oxide content in the resulting glass plate 100 and the designed content. This makes it difficult to control the composition of the glass powder, thereby affecting the flexural strength and fracture toughness of the glass powder.

[0202] Optionally, the melting holding time can be 2 to 5 hours. Specifically, the melting holding time can be, but is not limited to, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, and 5 hours. If the melting holding time is too short, some of the glass powder may not completely dissolve, resulting in unmelted particles remaining in the glass powder, which affects the mechanical properties and light transmittance of the resulting glass plate 100. If the melting holding time is too long, it increases the manufacturing cost of the glass plate 100. In addition, the sodium oxide and lithium oxide sources in the glass powder are prone to decomposition and volatilization, resulting in a significant difference between the sodium oxide and lithium oxide content in the resulting glass plate 100 and the designed content. This makes it difficult to control the composition of the glass powder, thereby affecting the flexural strength and fracture toughness of the glass powder.

[0203] S2022, molten glass is poured into a mold at a temperature of 300°C to 450°C to form a glass ingot; and

[0204] Alternatively, molten glass can be poured into a fully preheated high-temperature resistant metal mold to obtain a glass ingot.

[0205] Specifically, the preheating temperature of the mold can be, but is not limited to, 300℃, 320℃, 340℃, 360℃, 380℃, 400℃, 420℃, 440℃, 450℃, etc. If the preheating temperature of the mold is too low, the temperature between the molten glass and the mold will be too high, and the molten glass will easily crack during the casting process; if the preheating temperature of the mold is too high, the mold will easily deform, affecting the shape of the glass ingot.

[0206] S2023, glass ingots are heat-treated at a temperature of 500℃ to 600℃ to obtain glass substrate.

[0207] Optionally, the glass ingot is placed in a muffle furnace at a temperature of 500°C to 600°C for heat treatment, held for 12 to 24 hours, and then cooled naturally in the furnace.

[0208] Specifically, the heat treatment temperature can be, but is not limited to, 500℃, 520℃, 540℃, 560℃, 580℃, 600℃, etc. If the heat treatment temperature is too low, the time to remove stress in the glass ingot is too long, making it difficult to completely remove residual stress in the glass substrate and reducing the mechanical properties of the glass plate 100; if the heat treatment temperature is too high, the glass is prone to uncontrolled crystallization, affecting the bending strength, fracture toughness and light transmittance of the resulting glass plate 100.

[0209] Specifically, the heat treatment temperature can be, but is not limited to, 12h, 14h, 16h, 18h, 20h, 22h, 24h, etc. If the heat treatment time is too short, the residual stress in the glass will not be completely removed, affecting the mechanical properties of the glass plate 100; if the heat treatment time is too long, it will increase the manufacturing cost of the glass plate 100 and reduce the production efficiency of the glass plate 100.

[0210] Please see Figure 4 In some embodiments, in S203, the crystallization treatment of the glass substrate to obtain the glass plate 100 includes:

[0211] S2031, nucleation is performed on a glass substrate at 650°C to 730°C; and

[0212] Optionally, the glass substrate is nucleated in a muffle furnace at a temperature of 650°C to 730°C, that is, uniformly distributed crystal nuclei are formed inside the glass substrate, and the nucleation time is 2 hours to 24 hours.

[0213] Specifically, the nucleation temperature can be, but is not limited to, 650℃, 660℃, 670℃, 680℃, 690℃, 700℃, 710℃, 720℃, and 730℃. If the nucleation temperature is too low, nucleation cannot occur within the glass substrate, resulting in excessively low crystallinity in the glass plate 100, which reduces the mechanical properties of the glass plate 100, such as bending strength and fracture toughness. If the nucleation temperature is too high, the grains in the glass substrate begin to grow during the nucleation stage, which can easily lead to excessively rapid grain growth and abnormal growth of some grains. This results in uneven grain distribution within the glass plate 100, further reducing the mechanical properties of the glass plate 100, such as bending strength and fracture toughness, and also decreasing the light transmittance of the glass plate 100. When the formation temperature of the glass plate 100 is between 650℃ and 730℃, the nuclei can form more uniformly, resulting in a glass plate 100 with more uniform grain size, suitable crystallinity, and higher light transmittance.

[0214] Specifically, the nucleation time can be, but is not limited to, 2h, 4h, 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, 24h, etc. If the nucleation time is too short, the number of crystal nuclei formed in the glass substrate will be too small, reducing the crystallinity of the resulting glass plate 100 and lowering its mechanical properties such as bending strength and fracture toughness. If the nucleation time is too long, the production efficiency of the glass plate 100 will be reduced, and the manufacturing cost of the glass plate 100 will be increased.

[0215] S2032, a glass substrate is subjected to grain growth at 750°C to 850°C to obtain a glass plate 100.

[0216] Optionally, after the glass substrate nucleation is completed, the temperature of the muffle furnace is adjusted to 750°C to 850°C to allow grain growth within the glass substrate. The grain growth time is 3 hours to 24 hours.

[0217] Specifically, the grain growth temperature can be, but is not limited to, 750℃, 760℃, 770℃, 780℃, 790℃, 800℃, 810℃, 820℃, 830℃, 840℃, and 850℃. If the grain growth temperature is too low, the grain growth will be very slow, reducing the crystallinity of the glass plate 100, reducing the mechanical strength of the glass plate 100, and also reducing the production efficiency of the glass plate 100. If the grain growth temperature is too high, other impurity phases may be generated, affecting the mechanical properties and light transmittance of the glass plate 100; it may also cause abnormal grain growth, reducing the mechanical strength and light transmittance of the resulting glass plate 100.

[0218] Specifically, the grain growth time can be, but is not limited to, 3h, 4h, 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, 24h, etc. If the grain growth time is too short, the grain growth will be insufficient, reducing the crystallinity of the glass plate 100 and its mechanical strength. If the grain growth time is too long, the grains may grow too large, increasing the crystallinity of the glass plate 100, reducing its light transmittance, and also reducing the production efficiency of the glass plate 100.

[0219] Optionally, in some embodiments, when preparing the glass plate 100, the above method can be used to first prepare a thicker glass plate 100, then cut it using a multi-wire cutting machine, and perform double-sided grinding and polishing to obtain a glass plate 100 with a thickness of 0.3 mm to 1 mm. In addition, other thicknesses of glass plate 100 can also be used, which can be determined according to actual needs.

[0220] Optionally, the surface roughness Ra of the glass plate 100 can be, but is not limited to, less than or equal to 20 nm.

[0221] Please see Figure 5 This application also provides a reinforced glass 300, which is obtained by chemically strengthening the glass plate 100 described in the embodiments of this application.

[0222] For a detailed description of other aspects of the glass plate 100, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0223] The tempered glass 300 of this application embodiment is obtained by chemically strengthening the glass plate 100 described above. The glass plate 100 comprises, by mass fraction: 40wt% to 65wt% SiO2, 15wt% to 30wt% Al2O3, 15wt% to 30wt% Y2O3, 3wt% to 9wt% ZnO, 2wt% to 7wt% Li2O, 1wt% to 4wt% Na2O, 0.5wt% to 3wt% TiO2, 0.2wt% to 0.8wt% Sb2O3, 2wt% to 6wt% ZrO2, and 0.5wt% to 3wt% P2O5. By designing the composition of glass plate 100, the crystallized grains of glass plate 100 are nearly spherical, which better hinders crack propagation and gives glass plate 100 high fracture toughness and bending strength. Furthermore, the composition design of glass plate 100 enhances its chemical strengthening ability, resulting in strengthened glass 300 with higher bending strength, elastic modulus, fracture toughness, and Vickers hardness. Additionally, the composition design of glass plate 100 and strengthened glass 300 also improves light transmittance, leading to better display performance when used as a protective cover for a display screen.

[0224] In some embodiments, the tempered glass 300 satisfies at least one of the following conditions:

[0225] The flexural strength of the reinforced glass 300 is greater than or equal to 450 MPa;

[0226] The elastic modulus of the reinforced glass 300 is greater than or equal to 100 GPa;

[0227] The fracture toughness of the reinforced glass 300 is greater than or equal to 2.3 MPa·m. 1 / 2 ;

[0228] The Vickers hardness of the reinforced glass 300 is greater than or equal to 740 HV;

[0229] The surface compressive stress CS of the reinforced glass 300 is ≥300MPa;

[0230] The compressive stress CS50 at a depth of 50 μm in the reinforced glass 300 is ≥70 MPa; and

[0231] The strengthening depth DOL of the strengthened glass 300 is ≥70μm.

[0232] Specifically, the bending strength of tempered glass 300 can be, but is not limited to, 450MPa, 480MPa, 500MPa, 530MPa, 550MPa, 580MPa, 600MPa, 630MPa, 650MPa, 680MPa, 700MPa, 730MPa, 745MPa, 770MPa, 800MPa, 830MPa, 850MPa, and 880MPa. If the bending strength of tempered glass 300 is too low, its bending resistance is reduced; if the bending strength is too high, it becomes difficult to achieve in terms of materials and processes.

[0233] Optionally, the flexural strength of the tempered glass 300 ranges from 500 MPa to 745 MPa.

[0234] Specifically, the elastic modulus of the tempered glass 300 can be, but is not limited to, 100 GPa, 101 GPa, 103 GPa, 105 GPa, 108 GPa, 110 GPa, 113 GPa, 115 GPa, 118 GPa, 120 GPa, and 125 GPa. Optionally, the elastic modulus of the tempered glass 300 can range from 101 GPa to 115 GPa.

[0235] Specifically, the fracture toughness of the reinforced glass 300 can be, but is not limited to, 2.3 MPa·m. 1 / 2 2.4 MPa·m 1 / 2 2.5MPa·m 1 / 2 2.6 MPa·m 1 / 2 2.7 MPa·m 1 / 2 2.8 MPa·m 1 / 2 2.9 MPa·m 1 / 2 3.0 MPa·m 1 / 2 3.5 MPa·m 1 / 2 4.0 MPa·m 1 / 2 4.5 MPa·m 1 / 2 Alternatively, the fracture toughness of reinforced glass 300 can range from 2.3 MPa·m. 1 / 2 Up to 2.9 MPa·m 1 / 2 .

[0236] It should be noted that the Vickers hardness of the tempered glass 300 in this application is the Vickers hardness with a loading load of 0.5N (i.e., 500gf).

[0237] Specifically, the Vickers hardness of the tempered glass 300 can be, but is not limited to, 740HV, 760HV, 780HV, 800HV, 820HV, 840HV, 860HV, 880HV, 900HV, 920HV, etc. Optionally, the Vickers hardness of the tempered glass 300 can range from 780HV to 860HV.

[0238] Specifically, the surface compressive stress of the tempered glass 300 can be, but is not limited to, 300 MPa, 305 MPa, 310 MPa, 315 MPa, 320 MPa, 325 MPa, 330 MPa, 335 MPa, 340 MPa, 345 MPa, 350 MPa, 355 MPa, 360 MPa, etc. Optionally, the surface compressive stress of the tempered glass 300 can range from 313 MPa to 343 MPa. Optionally, the surface compressive stress of the tempered glass 300 with a thickness of 0.5 mm can range from 313 MPa to 343 MPa.

[0239] Specifically, the compressive stress CS50 of the tempered glass 300 at a depth of 50 μm can be, but is not limited to, 70 MPa, 80 MPa, 100 MPa, 110 MPa, 120 MPa, 123 MPa, 125 MPa, 127 MPa, 130 MPa, 140 MPa, etc. Optionally, the compressive stress CS50 of the tempered glass 300 at a depth of 50 μm can range from 120 MPa to 127 MPa. Optionally, the compressive stress CS50 of the tempered glass 300 with a thickness of 0.5 mm at a depth of 50 μm can range from 120 MPa to 127 MPa.

[0240] Specifically, the strengthening depth DOL of the tempered glass 300 can be, but is not limited to, 70μm, 80μm, 90μm, 91μm, 93μm, 95μm, 97μm, 100μm, 110μm, 120μm, 130μm, etc. Optionally, the strengthening depth DOL of the tempered glass 300 can range from 93μm to 100μm.

[0241] Optionally, the density of the tempered glass 300 in this embodiment is 3.25 g / cm³. 3 .

[0242] Optionally, the light transmittance of the tempered glass 300 in this embodiment of the application is greater than or equal to 82%.

[0243] Specifically, the light transmittance of the tempered glass 300 can be, but is not limited to, greater than or equal to 82%, greater than or equal to 85%, greater than or equal to 88%, greater than or equal to 90%, greater than or equal to 91%, greater than or equal to 92%, greater than or equal to 95%, etc. The tempered glass 300 of this application embodiment has a high light transmittance.

[0244] In some embodiments, the light transmittance of the 0.5 mm thick tempered glass 300 is 90.5% to 92%.

[0245] Please see Figure 6 This application also provides a method for preparing reinforced glass 300, the method comprising:

[0246] S301 provides glass powder;

[0247] S302, glass powder is shaped to obtain a glass substrate;

[0248] S303, the glass substrate is subjected to crystallization treatment to obtain glass plate 100;

[0249] For a detailed description of S301 to S303, please refer to the description of the corresponding feature portions in the above embodiments, which will not be repeated here.

[0250] S304 is used to chemically strengthen glass plate 100 to obtain strengthened glass 300.

[0251] Optionally, the glass plate 100 is immersed in molten salt for chemical strengthening to obtain strengthened glass 300.

[0252] In one embodiment, the fortified salt comprises 65 wt% NaNO3 and 35 wt% KNO3. In another embodiment, the fortified salt comprises 60 wt% NaNO3 and 40 wt% KNO3. In other embodiments, the NaNO3 and KNO3 in the fortified salt may also be in other amounts, which can be adjusted according to actual conditions.

[0253] Optionally, the temperature for chemical strengthening can be, but is not limited to, 400°C to 470°C. Specifically, the temperature for chemical strengthening can be, but is not limited to, 400°C, 410°C, 420°C, 430°C, 440°C, 450°C, 460°C, 470°C, etc.

[0254] Optionally, the chemical fortification time can be from 2 hours to 8 hours. Specifically, the chemical fortification time can be, but is not limited to, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, etc.

[0255] In this embodiment, the glass plate 100 is chemically strengthened by using the smaller lithium ions (or sodium ions) in the glass to exchange ions with the larger sodium ions (or potassium ions) in the strengthening salt, thereby causing the network structure of the glass surface to expand and generate compressive stress, forming a compressive stress layer on the glass surface. This compressive stress layer can significantly improve the mechanical strength of the glass.

[0256] Optionally, after chemical strengthening, the strengthened glass 300 is placed in a vacuum coating machine to coat the surface of the strengthened glass 300 with an anti-fingerprint (AF) film.

[0257] The glass plate 100 and the tempered glass 300 of this application will be further described below through specific embodiments.

[0258] Examples 1 to 28, Comparative Examples 1 to 18, and Comparative Example 20

[0259] The reinforced glass 300 of each embodiment and comparative example was prepared by the following steps:

[0260] (1) Weigh the SiO2 source, Al2O3 source, Y2O3 source, ZnO source, Li2O source, Na2O source, ZrO2 source, TiO2 source, P2O5 source and Sb2O3 source according to the preset ratio, and mix them evenly in a drum ball mill to obtain glass powder;

[0261] (2) The glass powder was placed in a platinum-rhodium crucible and melted at 1550℃ for 3 hours to obtain molten glass.

[0262] (3) Pour the molten glass into a mold at a temperature of 380°C to obtain a glass ingot;

[0263] (4) The glass ingot is heat-treated at 550°C to obtain a glass substrate;

[0264] (5) The glass substrate is placed in a muffle furnace and nucleated at 680°C for 8 hours; then grain growth is performed at 750°C for 2 hours to obtain glass plate 100; and

[0265] (6) Chemical strengthening is carried out in a molten strengthening salt at 460℃ to obtain strengthened glass 300, wherein the strengthening salt includes 60wt% NaNO3 and 40wt% KNO3, the chemical strengthening temperature is 460℃, and the chemical strengthening time is 6h.

[0266] Comparative Example 19

[0267] The difference between this comparative example and Example 25 is that the contents of silicon oxide and aluminum oxide are slightly different. In addition, the grain growth temperature of this comparative example is 850°C.

[0268] The tempered glass 300 of each embodiment and comparative example was made with a thickness of 0.5 mm, and the following performance tests were performed on the tempered glass 300 of each embodiment and comparative example:

[0269] (1) Density: Refer to GB / T 7962.20-2010 Test Methods for Colorless Optical Glass Part 20: Density.

[0270] (2) Young's modulus: Refer to GB / T 7962.6-2010 Colorless optical glass test methods part 6: Young's modulus, shear modulus and Poisson's ratio.

[0271] (3) Bending strength: Refer to the four-point bending strength test method in GB T 37781-2019 Glass Materials Bending Strength Test Method, and test 5 points for each group of samples.

[0272] (4) Vickers hardness: Referring to "GB-T 37900-2019 Test Method for Hardness and Fracture Toughness of Ultra-thin Glass - Small Load Vickers Hardness Indentation Method", the hardness of reinforced glass 300 was tested using a Vickers hardness tester with a load of 500 gf and a holding time of 15 s. Five samples were tested for each group, and the average value was taken. The calculation formula is as follows: Load is 500 gf.

[0273]

[0274] Where, a is the length (mm) from the center of the indentation to the edge of the indentation, a is Figure 7 In the figure, a1 and a2 are the average values, P is the applied load (N, 500gf = 5N), and HV is the dimensionless Vickers hardness (HV). 0.5 ).

[0275] (5) Fracture toughness (K) IC The fracture toughness of reinforced glass 300 was tested using a Vickers hardness tester. The load was 500 gf, and the holding time was 15 s. Five samples were tested in each group, and the average value was taken. The calculation formula is as follows:

[0276]

[0277] In the formula, c is the length (mm) from the center of the indentation to the crack tip, and c is... Figure 7 The average values ​​of c1 and c2, and a1 and a2 are... Figure 7 The length (mm) from the center of the indentation to the edge of the indentation, P is the applied load (N, 500gf = 5N), H is the dimensionless Vickers hardness (GPa), and E is the elastic modulus (GPa) of tempered glass 300.

[0278] A photograph of the fracture toughness indentation of the reinforced glass 300 in Example 1 is shown below. Figure 7 As shown in (a), the indentation diagram is as follows: Figure 7 As shown in (b).

[0279] (6) Phase analysis: Phase analysis was performed using X-ray diffraction (XRD) with a scanning angle range of 10° to 80° and a scanning rate of 5° / min. Crystallinity was calculated using the peak area method.

[0280] (7) Microstructure and grain size: The tempered glass 300 was first etched with 10 vol% hydrofluoric acid for 5 s, and then photographed and analyzed using a scanning electron microscope (SEM). The grain size was statistically measured according to "ISO 13383-1-2012 Fine ceramics (advanced ceramics, advanced technical ceramics) - Microstructural characterization - Part 1: Determination of grain size and size distribution Céramiques techniques" and "ISO 13383-1-2012 Fine ceramics (advanced ceramics, advanced technical ceramics) - Microstructural characterization - Part 1: Determination of grain size and size distribution Céramiques techniques". The number of grains counted in each sample group was ≥100, and the average value was taken.

[0281] (8) Stress test: The stress of the 300 (0.5 mm) tempered glass was tested using SLP-2000 to obtain the CS, CS50 and DOL of the 300 tempered glass.

[0282] The material composition of the glass plate 100 in each embodiment and comparative example is shown in Table 1 below.

[0283] Table 1. Composition of glass plate 100 in each embodiment and comparative example.

[0284]

[0285]

[0286] The test data for each embodiment and the comparative example of the tempered glass 300 are shown in Table 2 below.

[0287] Table 2 Test data of the tempered glass 300 in each embodiment and comparative example

[0288]

[0289]

[0290]

[0291] Figure 8This is the X-ray diffraction pattern (i.e., XRD pattern) of the strengthened glass 300 in Example 25, derived from... Figure 8 It is known that the crystal phase of the reinforced glass 300 in Example 25 is at least one of Y2Ti2O7, Y2Zr2O7, and ZrO2.

[0292] Figure 9 This is a scanning electron microscope (SEM) image of the reinforced glass 300 of Example 25, from... Figure 9 It can be seen that the grains of the reinforced glass 300 in Example 25 are nearly spherical, the grain size distribution is relatively uniform, and the grain size is about 35nm.

[0293] Figure 10 This is the X-ray diffraction (XRD) pattern of the reinforced glass 300 in Comparative Example 19, derived from... Figure 10 It can be seen that the crystal phase of the reinforced glass 300 in Comparative Example 19 is at least one of LiAlSi2O6, Y2Ti2O7, Y2Zr2O7, and ZrO2.

[0294] Figure 11 This is a scanning electron microscope (SEM) image of the reinforced glass 300 in Comparative Example 19, by... Figure 11 It can be seen that the sphericity of the grains in the reinforced glass 300 of Comparative Example 19 is relatively low, the grain distribution is relatively uneven, and the grain size is about 40nm.

[0295] The test results from Examples 1 to 4, and Comparative Examples 1 and 2 show that when the mass ratio of ZrO2 to P2O5 in glass plate 100 is 1 to 8 (Examples 1 to 4), the strengthened glass 300 obtained after chemical strengthening of the glass plate 100 has a higher Young's modulus, higher flexural strength and Vickers hardness, higher fracture toughness, and higher light transmittance (greater than or equal to 90.5%). When the mass ratio of ZrO2 to P2O5 in glass plate 100 is too small (as in Comparative Example 1), the light transmittance of the strengthened glass plate 100 is greatly reduced, reaching only 50%. The strengthened glass 300 has lower crystallinity, lower strengthening depth and compressive stress. In addition, the Young's modulus, flexural strength, Vickers hardness, and fracture toughness of the strengthened glass 300 are all reduced. When the mass ratio of ZrO2 to P2O5 in glass plate 100 is too large (as in Comparative Example 2), although the Young's modulus, Vickers hardness and fracture toughness of the tempered glass 300 increase, the light transmittance of the tempered glass 300 is greatly reduced and the bending strength is also reduced to a large extent.

[0296] The test results from Examples 3, 5, 6, Comparative Examples 3 and 4 show that when the ZrO2 content in glass plate 100 is low (as in Comparative Example 3), the tempered glass 300 has low light transmittance. As the zirconium oxide content in glass plate 100 increases, the light transmittance of tempered glass 300 first gradually increases, then gradually decreases. When the zirconium oxide content in glass plate 100 is too high (as in Comparative Example 4), the light transmittance of tempered glass 300 also decreases significantly. Furthermore, as the zirconium oxide content in glass plate 100 increases, the Young's modulus, flexural strength, Vickers hardness, and fracture toughness of tempered glass 300 all gradually increase.

[0297] The test results from Examples 3, 7, 8, and Comparative Example 5 show that adding an appropriate amount of P2O5 to the glass plate 100 can give the tempered glass 300 higher Young's modulus, flexural strength, Vickers hardness, and fracture toughness. With the increase of phosphorus pentoxide content in the glass plate 100, the Young's modulus, flexural strength, Vickers hardness, and fracture toughness of the tempered glass 300 all first gradually increase and then gradually decrease, but the changes are small. With the increase of phosphorus pentoxide content in the glass plate 100, the light transmittance of the tempered glass 300 also first gradually increases and then gradually decreases. When the phosphorus pentoxide content in the glass plate 100 is too high (as in Comparative Example 5), the light transmittance of the tempered glass 300 is greatly reduced.

[0298] As can be seen from the test results of Example 25 and Comparative Example 20, the P2O5 content in glass plate 100 is too high. It can slightly increase the crystallinity of tempered glass 300, but it causes tempered glass 300 to devitrify, with a transmittance of less than 80%.

[0299] The test results from Examples 3, 9, 10, and Comparative Example 6 show that when the mass fraction of Sb₂O₃ in glass plate 100 is between 0.2 wt% and 0.8 wt%, both glass plate 100 and the strengthened glass 300 exhibit high light transmittance. Adding a small amount of Sb₂O₃ to glass plate 100 can improve the light transmittance of both glass plate 100 and the strengthened glass plate 100. With increasing Sb₂O₃ content, the light transmittance of both glass plate 100 and the strengthened glass plate 100 initially increases gradually, then gradually decreases. When the mass fraction of Sb₂O₃ in glass plate 100 is too high, the light transmittance of both glass plate 100 and the strengthened glass 300 will decrease significantly.

[0300] The test results from Examples 3, 11, 12, and Comparative Example 7 show that when the mass fraction of TiO2 in glass plate 100 is between 0.5 wt% and 3 wt%, both glass plate 100 and the strengthened glass 300 exhibit high light transmittance. Adding a small amount of TiO2 to glass plate 100 can improve the light transmittance of both glass plate 100 and the strengthened glass plate 100. As the amount of TiO2 added increases, the light transmittance of both glass plate 100 and the strengthened glass plate 100 first gradually increases and then gradually decreases. When the mass fraction of TiO2 in glass plate 100 is too high, the light transmittance of both glass plate 100 and the strengthened glass 300 will decrease significantly.

[0301] The test results of Examples 3, 13, 14, Comparative Example 8 and Comparative Example 9 show that as the sodium oxide content in glass plate 100 increases or the mass ratio of potassium oxide to sodium oxide decreases, the strengthening depth, surface compressive stress and 50μm compressive stress of the tempered glass 300 gradually increase. The bending strength, Vickers hardness and fracture toughness of the tempered glass 300 also gradually increase. However, the Young's modulus of the tempered glass 300 gradually decreases, and the light transmittance of the tempered glass 300 first gradually increases and then gradually decreases.

[0302] The test results from Examples 3, 15, 16, Comparative Example 10, and Comparative Example 11 show that when the Li2O content in the glass plate 100 is too low (as in Comparative Example 10), the compressive stress of the tempered glass 300 is low, and its bending strength, Vickers hardness, and fracture toughness are also reduced. As the Li2O content in the glass plate 100 increases (as in Examples 3, 15, and 16), the bending strength, Vickers hardness, and fracture toughness of the tempered glass 300 gradually increase; however, the light transmittance of the tempered glass 300 first gradually increases and then gradually decreases. When the Li2O content in the glass plate 100 is too high (as in Comparative Example 11), the light transmittance of the tempered glass 300 decreases significantly. When the mass fraction of Li2O in the glass plate 100 is 2% to 7%, the tempered glass 300 can possess high bending strength, Vickers hardness, and fracture toughness, as well as high light transmittance.

[0303] The test results from Examples 3, 17, 18, Comparative Examples 12 and 13 show that adding zinc oxide to glass plate 100 can improve the light transmittance of tempered glass 300. As the ZnO content in glass plate 100 increases, the light transmittance of tempered glass 300 first gradually increases and then gradually decreases. When the zinc oxide content in glass plate 100 is too high (as in Comparative Example 13), the light transmittance of tempered glass 300 decreases significantly. Furthermore, as the zinc oxide content in glass plate 100 increases, the Young's modulus, flexural strength, Vickers hardness, and fracture toughness of tempered glass 300 all first gradually increase and then gradually decrease, but still maintain high performance.

[0304] The test results of Examples 3, 19, 20, 14 and 15 show that as the Y2O3 content in the glass plate 100 increases, the Young's modulus, bending strength, Vickers hardness and fracture toughness of the tempered glass 300 gradually increase. However, the light transmittance of the tempered glass 300 first gradually increases and then gradually decreases. When the Y2O3 content in the glass plate 100 is too high, the light transmittance of the tempered glass 300 is greatly reduced.

[0305] As can be seen from the test data of Examples 25 and 27, compared with Example 25, the glass plate 100 of Example 27 has a higher Y2O3 content, which makes the tempered glass 300 have a higher Young's modulus and Vickers hardness.

[0306] The test results of Examples 3, 21, 22, Comparative Example 16 and Comparative Example 17 show that as the Al2O3 content in the glass plate 100 increases, the Young's modulus, bending strength, Vickers hardness and fracture toughness of the tempered glass 300 gradually increase. However, the light transmittance of the tempered glass 300 first gradually increases and then gradually decreases. When the Al2O3 content in the glass plate 100 is too high or too low, the light transmittance of the tempered glass 300 will be reduced.

[0307] The test results from Examples 3, 23, 24, and Comparative Example 18 show that when the K₂O content in glass plate 100 is less than or equal to 2%, the tempered glass 300 exhibits higher Young's modulus, flexural strength, Vickers hardness, fracture toughness, and light transmittance. When the potassium oxide content in glass plate 100 is too high, or when the total mass fraction of potassium oxide and sodium oxide exceeds the mass fraction of lithium oxide, the flexural strength and Vickers hardness of the tempered glass 300 decrease significantly.

[0308] As shown in the test results of Example 25 and Comparative Example 19, the strengthened glass 300 of Comparative Example 19 has a higher grain growth temperature, resulting in the formation of a new spodumene crystal phase. Although the formation of the spodumene crystal phase increases the crystallinity of the strengthened glass 300, the refractive index of spodumene itself differs significantly from that of the original crystal phase. This larger refractive index difference implies greater phase interface scattering, which further reduces the transmittance of the material, thus significantly decreasing the light transmittance of the strengthened glass 300. Furthermore, the precipitation of Li from the glass phase reduces the amount of Li participating in chemical strengthening within the glass phase, leading to a decrease in the strengthening depth DOL and the 50 μm deep compressive stress CS50 of the strengthened glass 300 of Comparative Example 19.

[0309] As can be seen from the test data of Examples 3 and 28, adding potassium oxide to glass plate 100 can improve the light transmittance of tempered glass 300. In addition, it can also improve the Young's modulus, bending strength, Vickers hardness and fracture toughness of tempered glass 300.

[0310] Please see Figure 12 to Figure 14 This application also provides an electronic device 500, which includes a display screen 510, a reinforced glass 300 as described in this application embodiment, and a processor 530. The display screen 510 has a light-emitting surface 511; the reinforced glass 300 is disposed on the light-emitting surface 511 of the display screen 510; the processor 530 is electrically connected to the display screen 510 and is used to control the display screen 510 to display.

[0311] The electronic device 500 in this application embodiment can be, but is not limited to, a mobile phone, tablet computer, laptop computer, desktop computer, smart bracelet, smartwatch, e-reader, game console, or other portable electronic device 500.

[0312] For a detailed description of the tempered glass 300, please refer to the description of the corresponding section of the above embodiments, which will not be repeated here.

[0313] Optionally, the display screen 510 may be, but is not limited to, one or more of the following: liquid crystal display screen, light-emitting diode display screen (LED display screen), micro light-emitting diode display screen (Micro LED display screen), mini light-emitting diode display screen (Mini LED display screen), organic light-emitting diode display screen (OLED display screen).

[0314] Optionally, processor 530 includes one or more general-purpose processors, wherein the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), microprocessor, microcontroller, main processor, controller, and ASIC, etc. Processor 530 is used to execute various types of digital storage instructions, such as software or firmware programs stored in memory, which enables the computing device to provide a wide range of services.

[0315] Optionally, the electronic device 500 of this application further includes a memory 550. The memory 550 is electrically connected to the processor 530 and is used to store the program code required for the processor 530 to run, the program code required to control the display screen 510, the display content of the display screen 510, etc.

[0316] Optionally, memory 550 may include volatile memory, such as random access memory (RAM); memory 550 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory (FM), hard disk drive (HDD), or solid-state drive (SSD). Memory 550 may also include combinations of the above types of memory.

[0317] In some embodiments, the electronic device 500 of this application further includes a housing 540, a mid-frame 520, and a camera module 570. The mid-frame 520 is disposed between the display screen 510 and the housing 540, and the side of the mid-frame 520 is exposed between the housing 540 and the display screen 510. The mid-frame 520 and the housing 540 enclose an accommodating space (not shown), which is used to accommodate a processor 530, a memory 550, and the camera module 570. The camera module 570 is electrically connected to the processor 530 and is used to take pictures under the control of the processor 530.

[0318] Optionally, the housing 540 has a light-transmitting portion 541, through which the camera module 570 can capture images. That is, in this embodiment, the camera module 570 is a rear-facing camera module 570. It is understood that in other embodiments, the light-transmitting portion 541 may be disposed on the display screen 510, i.e., the camera module 570 is a front-facing camera module 570. In the schematic diagram of this embodiment, the light-transmitting portion 541 is shown as an opening. In other embodiments, the light-transmitting portion 541 may not be an opening, but may be made of a light-transmitting material, such as plastic or glass.

[0319] It is understood that the electronic device 500 described in this embodiment is merely one form of the electronic device 500 used on the tempered glass 300, and should not be construed as a limitation on the electronic device 500 provided in this application, nor should it be construed as a limitation on the tempered glass 300 provided in various embodiments of this application.

[0320] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0321] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A glass plate, characterized in that, The crystal phase of the glass plate includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6, the crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is greater than or equal to 82%.

2. The glass plate according to claim 1, characterized in that, The grain size of the glass plate is 16 nm to 30 nm.

3. The glass plate according to claim 1, characterized in that, The glass plate comprises, by mass fraction: 40wt% to 65wt% SiO2; 15wt% to 30wt% Al2O3; 15wt% to 30wt% Y2O3; 3wt% to 9wt% ZnO; 2wt% to 7wt% Li2O; 1 wt% to 4 wt% Na2O; 0.5wt% to 3wt% TiO2; 0.2wt% to 0.8wt% Sb2O3; ZrO2; and P2O5; The mass ratio of ZrO2 to P2O5 ranges from 1 to 8.

4. The glass plate according to claim 3, characterized in that, In the glass plate, the mass fraction of ZrO2 ranges from 2 wt% to 6 wt%; and the mass fraction of P2O5 ranges from 0.5 wt% to 3 wt%.

5. The glass plate according to claim 1, characterized in that, The glass plate comprises, by mass fraction: 40wt% to 55wt% SiO2; 20wt% to 30wt% Al2O3; 20wt% to 30wt% Y2O3; 4wt% to 8wt% ZnO; 3wt% to 5wt% Li2O; 1.5wt% to 3.5wt% Na2O; 3wt% to 6wt% ZrO2; 0.5wt% to 2wt% TiO2; 0.5wt% to 2wt% P2O5; and 0.3wt% to 0.5wt% Sb2O3.

6. The glass plate according to claim 3, characterized in that, The glass plate also includes K2O, and the total mass fraction of K2O and Na2O in the glass plate is less than the mass fraction of Li2O.

7. The glass plate according to claim 3, characterized in that, In the glass plate, the mass ratio of K2O to Na2O ranges from 1 / 8 to 1 / 2.

8. The glass plate according to claim 3, characterized in that, The mass fraction of K2O in the glass plate is less than or equal to 2 wt%.

9. The glass plate according to claim 3, characterized in that, The glass plate also includes B2O3, and the mass fraction of B2O3 in the glass plate is less than or equal to 3 wt%.

10. A glass plate, characterized in that, The glass plate comprises, by mass fraction: 40wt% to 65wt% SiO2; 15wt% to 30wt% Al2O3; 15wt% to 30wt% Y2O3; 3wt% to 9wt% ZnO; 2wt% to 7wt% Li2O; 1 wt% to 4 wt% Na2O; 0.5wt% to 3wt% TiO2; 0.2wt% to 0.8wt% Sb2O3; ZrO2; and P2O5; The mass ratio of ZrO2 to P2O5 ranges from 1 to 8.

11. The glass plate according to claim 10, characterized in that, The mass fraction of ZrO2 ranges from 2 wt% to 6 wt%; the mass fraction of P2O5 ranges from 0.5 wt% to 3 wt%.

12. The glass plate according to claim 10, characterized in that, The glass plate also includes K2O, and the total mass fraction of K2O and Na2O in the glass plate is less than the mass fraction of Li2O.

13. The glass plate according to claim 10, characterized in that, In the glass plate, the mass ratio of K2O to Na2O ranges from 1 / 8 to 1 / 2.

14. The glass plate according to claim 10, characterized in that, The mass fraction of K2O in the glass plate is less than or equal to 2 wt%.

15. The glass plate according to claim 10, characterized in that, The glass plate also includes B2O3, and the mass fraction of B2O3 in the glass plate is less than or equal to 3 wt%.

16. The glass plate according to claim 10, characterized in that, The glass plate satisfies at least one of the following conditions: The crystal phase of the glass plate includes at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6; The crystallinity of the glass plate ranges from 30% to 40%. The grain size of the glass plate is 16 nm to 30 nm; The light transmittance of the glass plate is greater than or equal to 82%.

17. A method for preparing a glass plate, characterized in that, The preparation method includes: Provide glass powder; The glass powder is molded to obtain a glass substrate; and The glass substrate is subjected to crystallization treatment to obtain a glass plate; The glass plate has a crystal phase including at least one of Y2Ti2O7, Y2Zr2O7, ZrO2, and LiAlSi2O6, and the crystallinity of the glass plate ranges from 30% to 40%, and the light transmittance of the glass plate is greater than or equal to 82%.

18. The method for preparing a glass plate according to claim 17, characterized in that, The process of molding the glass powder to obtain a glass substrate includes: The glass powder is melted at a temperature of 1500°C to 1600°C to obtain molten glass; The molten glass is poured into a mold at a temperature of 300°C to 450°C to form a glass ingot; and The glass ingot is heat-treated at a temperature of 500°C to 600°C to obtain a glass substrate.

19. The method for preparing a glass plate according to claim 17, characterized in that, The crystallization treatment of the glass substrate to obtain a glass plate includes: The glass substrate is nucleated at 650°C to 730°C; and The glass substrate is subjected to grain growth at 750°C to 850°C to obtain the glass plate.

20. A type of tempered glass, characterized in that, The tempered glass is obtained by chemically strengthening the glass sheet according to any one of claims 1-16.

21. The tempered glass according to claim 20, characterized in that, The tempered glass satisfies at least one of the following conditions: The flexural strength of the reinforced glass is greater than or equal to 450 MPa; The elastic modulus of the reinforced glass is greater than or equal to 100 GPa; The fracture toughness of the reinforced glass is greater than or equal to 2.3 MPa·m. 1 / 2 ; The Vickers hardness of the reinforced glass is greater than or equal to 740 HV; The surface compressive stress CS of the tempered glass is ≥300MPa; The compressive stress CS50 at a depth of 50 μm in the tempered glass is ≥70 MPa; as well as The strengthening depth of the strengthened glass is DOL ≥ 70 μm.

22. An electronic device, characterized in that, include: The display screen has a light-emitting surface; The reinforced glass according to claim 20 or 21, wherein the reinforced glass is disposed on the light-emitting surface of the display screen; as well as A processor, electrically connected to the display screen, is used to control the display screen to perform a display.

Images