Flexible glass, flexible glass product and preparation method

Abstract

The invention provides flexible glass, a flexible glass product and a preparation method, and relates to the technical field of materials, the thickness of the flexible glass is 0.03-0.1 mm, the elastic modulus is 55.40-64.35 GPa, the flexible glass comprises 35 mol%-65 mol% of SiO2 and 8 mol%-22 mol% of Al2O3, and therefore it can be guaranteed that the glass has good chemical stability so as to improve the stress storage capacity; the flexible glass further comprises P2O5 which is greater than 0 and less than or equal to 20 mol%, so that the elastic modulus of the glass can be reduced as much as possible, and the bending mechanical property is improved; the flexible glass further comprises 17.8 mol% to 28 mol% of R2O, and the R2O comprises at least one of Li2O, Na2O and K2O, so that the glass has relatively high surface compressive stress after being chemically strengthened. Through the implementation of the scheme, the glass has a certain thickness, so that the mechanical strength is guaranteed, and meanwhile, the flexibility is guaranteed due to the relatively low elastic modulus, namely, the flexible glass provided by the scheme has the mechanical strength and the flexibility.

Description

Technical Field

[0001] The present application relates to the field of material technology, in particular to the field of glass technology. Specifically, the present application discloses a flexible glass, a flexible glass product, and a preparation method. Background Art

[0002] Flexible glass's excellent flexibility and ductility allow it to bend and fold, making it widely applicable in areas such as foldable phones and smart wearable devices. Compared to CPI materials, flexible glass is less susceptible to scratches and has a smoother touch. Furthermore, in terms of light transmittance, since CPI is a resin film, its transmittance is generally less than 90%. Resin materials also suffer from the common aging problem of yellowing and decreased transmittance due to UV or sunlight. Flexible glass, with an average visible light transmittance exceeding 91%, leverages the inherent advantages of glass material to provide users with a better visual experience. Furthermore, with a glass transition temperature of up to 600°C, flexible glass also offers superior temperature performance compared to CPI.

[0003] In the related art, the flexible glass currently provided is reduced in thickness through physical or chemical methods, such as secondary thinning, to achieve the purpose of improving the flexibility of the glass. Due to the extremely low thickness of the flexible glass, turnover, transportation, and processing during the processing will cause a large yield loss. At the same time, the processing process will leave microcracks on the surface of the flexible glass due to processing residues, which will reduce the mechanical strength of the flexible glass. Any impurities and microcracks will have a negative impact on the flexible glass, and it is more likely to break in actual applications. It can be seen that the flexible glass provided by the related art cannot take into account both mechanical strength and flexibility.

[0004] It is important to note that the techniques described in this section are not necessarily those that have been previously conceived or employed. Unless otherwise indicated, it should not be assumed that any technique described in this section is prior art simply because it is included in this section. Similarly, unless otherwise indicated, the issues mentioned in this section should not be considered to have been recognized as prior art. Summary of the Invention

[0005] The present application provides a flexible glass, a flexible glass product and a preparation method, aiming to solve at least one of the problems in the related art to a certain extent.

[0006] In a first aspect, the present application provides a flexible glass having a thickness of 0.03 to 0.1 mm and an elastic modulus of 55.40 to 64.35 GPa. The components thereof, expressed in mole percentage, include:

[0007] SiO2 greater than or equal to 35% and less than or equal to 65%;

[0008] Al2O3 greater than or equal to 8% and less than or equal to 22%;

[0009] P2O5 greater than 0 and less than or equal to 20%;

[0010] RO is greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO;

[0011] R2O contains 17.8% or more and 28% or less, wherein the R2O comprises at least one of Li2O, Na2O, and K2O;

[0012] The amount of a clarifier is greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

[0013] Optionally, the flexible glass satisfies the following relationship:

[0014] Ef=9.8*(6.52*n SiO2 +(0.064*(n SiO2 +n Al2O3 )-3.9)*n P2O5 +11*n Al2O3 +17*n MgO +12.5*n CaO +8.5*n BaO +5*n ZnO +15*n Li2O +4.5*n Na2O +1*n K2O ),

[0015] 47≤Ef≤64;

[0016] Wherein, Ef represents the flexibility measurement index, and n represents the molar percentage content of each oxide.

[0017] Optionally, the flexible glass satisfies: 50≤Ef≤60.

[0018] Optionally, the flexible glass satisfies the following relationship:

[0019] η=(60.08*n SiO2 +141.94*n P2O5 +101.96*n Al2O3 +40.3*n MgO +56.08*n CaO +153.33*n BaO +81.38*n ZnO +29.98*nLi2O +61.98*n Na2O +94.2*n K2O ) / ((28.25-0.031*n SiO2 )*n SiO2 +64*n P2O5 +42.7*n Al2O3 +12.5*n MgO +14.4*n CaO +17*n BaO +7.5*n ZnO +8*n Li2O +19.5*n Na2O +42*n K2O ),

[0020] 2.3≤η≤2.6;

[0021] Here, η represents the bendability measurement index, and n represents the molar percentage content of each oxide.

[0022] Optionally, the flexible glass satisfies: 2.4≤η≤2.5.

[0023] Optionally, the components of the flexible glass include, by mole percentage, greater than or equal to 7% and less than or equal to 16% of P2O5.

[0024] Optionally, the components of the flexible glass include, by mole percentage, greater than or equal to 8% and less than or equal to 14% of P2O5.

[0025] Optionally, the components of the flexible glass include, by mole percentage, greater than or equal to 17.8% and less than or equal to 23% of R2O.

[0026] Optionally, the components of the flexible glass include, by mole percentage, R2O of greater than or equal to 18.5% and less than or equal to 22%.

[0027] Optionally, the components of the flexible glass include, by mole percentage, greater than or equal to 12% and less than or equal to 18% of Al2O3; and / or greater than or equal to 4% and less than or equal to 10% of RO; and / or greater than or equal to 0.25% and less than or equal to 0.3% of a clarifier.

[0028] Optionally, the components of the flexible glass are expressed in mole percentage, and the total content of SiO2 and Al2O3 is greater than or equal to 50% and less than or equal to 75%.

[0029] Optionally, the components of the flexible glass are expressed in mole percentage, and the total content of SiO2 and Al2O3 is greater than or equal to 55% and less than or equal to 70%.

[0030] Optionally, the components of the flexible glass, in molar percentage, further include: ZnO greater than 0 and less than or equal to 5%; MgO greater than or equal to 0 and less than or equal to 5%; CaO greater than or equal to 0 and less than or equal to 5%; SrO greater than or equal to 0 and less than or equal to 6%; BaO greater than or equal to 0 and less than or equal to 8%.

[0031] Optionally, the components of the flexible glass, in molar percentage, further include: greater than 2% and less than or equal to 4% ZnO; greater than or equal to 2% and less than or equal to 3% MgO; greater than or equal to 2% and less than or equal to 3% CaO; greater than or equal to 3% and less than or equal to 5% SrO; greater than or equal to 3% and less than or equal to 6% BaO.

[0032] Optionally, the flexible glass has a thickness of 0.05 to 0.075 mm and does not need to undergo a thinning process.

[0033] A second aspect of the present application provides a flexible glass product, which is obtained by subjecting the flexible glass according to the first aspect to ion exchange treatment.

[0034] A third aspect of the present application provides a method for preparing flexible glass, comprising:

[0035] The raw materials are mixed evenly according to the glass formula and then melted at a preset melting temperature and melting time to obtain glass liquid;

[0036] The glass liquid is gradually cooled to a target temperature and then formed, and then subjected to mechanical processing to obtain flexible glass;

[0037] The flexible glass has a thickness of 0.03 to 0.1 mm and an elastic modulus of 55.40 to 64.35 GPa. Its components, in molar percentage, include: SiO2 greater than or equal to 35% and less than or equal to 65%; Al2O3 greater than or equal to 8% and less than or equal to 22%; P2O5 greater than 0 and less than or equal to 20%; RO greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO; R2O greater than or equal to 17.8% and less than or equal to 28%, and R2O includes at least one of Li2O, Na2O, and K2O; and a clarifier greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

[0038] Optionally, the smelting temperature is 1500-1650°C, the smelting time is greater than or equal to 30 minutes, and the target temperature is 900-1650°C.

[0039] Optionally, the flexible glass having a thickness of 0.05 to 0.075 mm is prepared without undergoing a thinning process.

[0040] A fourth aspect of the present application provides a method for preparing a flexible glass product, comprising:

[0041] Immersing the flexible glass of the first aspect of the present application in a chemically strengthened salt bath for ion exchange treatment to obtain a flexible glass product;

[0042] The chemical strengthening salt bath includes, by mass percentage, KNO3 greater than or equal to 60% and less than or equal to 100%, KOH greater than or equal to 0 and less than or equal to 5%, K2CO3 greater than or equal to 0 and less than or equal to 5%, NaNO3 greater than or equal to 0 and less than or equal to 50%, NaOH greater than or equal to 0 and less than or equal to 2%, Na2CO3 greater than or equal to 0 and less than or equal to 3%, LiNO3 greater than or equal to 0 and less than or equal to 10%, and Li2CO3 greater than or equal to 0 and less than or equal to 3%.

[0043] Optionally, the temperature of the chemical strengthening salt bath is 350-480° C., and the duration of the ion exchange treatment is 10-60 minutes.

[0044] As can be seen from the above, according to the flexible glass, flexible glass products and preparation method provided by the present application, the thickness of the flexible glass is 0.03~0.1mm, and the elastic modulus is 55.40~64.35GPa. It includes SiO2 greater than or equal to 35mol% and less than or equal to 65mol%, and Al2O3 greater than or equal to 8mol% and less than or equal to 22mol%, so as to ensure that the glass itself has good chemical stability to ensure stress storage capacity; and the flexible glass also includes P2O5 greater than 0 and less than or equal to 20mol%, so as to reduce the elastic modulus of the glass itself as much as possible and improve the bendable mechanical properties; in addition, the flexible glass also includes R2O greater than or equal to 17.8mol% and less than or equal to 28mol%, and R2O includes at least one of Li2O, Na2O, and K2O, so as to ensure that the glass has a higher surface compressive stress after chemical strengthening. Through the implementation of the solution of the present application, while the mechanical strength is guaranteed due to the certain thickness of the glass, the flexibility is also guaranteed due to the low elastic modulus. That is, the flexible glass provided by the solution of the present application has both mechanical strength and flexibility.

[0045] It should be understood that the content described in this section is not intended to identify the key or important features of the present application, nor is it intended to limit the scope of the present application. The further effects of the above non-conventional optional manner will be described below in conjunction with specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0047] In the description of the embodiments of the present application, the term "multiple" means two or more, unless otherwise clearly and specifically limited; the term "including" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections; the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may include the existence of A alone, the existence of A and B at the same time, and the existence of B alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship; the term "about" means that the content, size, parameter, etc. are not and do not need to be exact. If necessary, they can be approximate or higher or lower. Generally speaking, regardless of whether there is an explicit description, the content, size, parameter, etc. should be "about" or "approximate"; the terms "preferably" and "optional" are not used to limit the scope of the present application, nor do they mean that certain technical features are critical or indispensable to the implementation methods of the present application. Instead, they should be understood as merely indicating specific aspects of the embodiments of the present application.

[0048] Unless otherwise indicated in specific circumstances, the numerical ranges described in the examples of the present application are intended to include the endpoints of the numerical range and all integers and fractions within the range. When an amount, solubility or other parameter is described in the form of a preferred range or preferred value, it should be understood that it is equivalent to revealing any range by combining any preferred range with a preferred range, a preferred value with a preferred value, or a preferred range with a preferred value, without considering whether such pairwise combinations are specifically explained in the examples.

[0049] Unless otherwise specified in specific circumstances, the component contents described in the examples of the present application are expressed in molar percentage (mol%).

[0050] In order to at least to some extent solve the problem that the flexible glass provided in the related art cannot take into account both mechanical strength and flexibility, one embodiment of the present application provides a flexible glass, the thickness of the flexible glass is 0.03-0.1 mm, the elastic modulus is 55.40-64.35 GPa, and its components, in molar percentage, include: SiO2 greater than or equal to 35% and less than or equal to 65%; Al2O3 greater than or equal to 8% and less than or equal to 22%; P2O5 greater than 0 and less than or equal to 20%; RO greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO; R2O greater than or equal to 17.8% and less than or equal to 28%, and R2O includes at least one of Li2O, Na2O, and K2O; a clarifier greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

[0051] SiO2 is an important glass-forming oxide, forming an irregular continuous network of silicon-oxygen tetrahedral structural units, which serves as the skeleton of the glass. In this embodiment, the lower limit of the SiO2 content is 35% and the upper limit is 65%. In some embodiments, the glass composition may include SiO2 in amounts such as 35%, 37.5%, 40%, 42.5%, 45%, 47.5%, 50%, 52.5%, 55%, 57.5%, 60%, 62.5%, and 65%. In some embodiments, the glass composition may also include SiO2 in amounts such as greater than or equal to 37% and less than or equal to 63%, greater than or equal to 39% and less than or equal to 61%, greater than or equal to 41% and less than or equal to 59%, greater than or equal to 43% and less than or equal to 57%, greater than or equal to 45% and less than or equal to 55%, greater than or equal to 47% and less than or equal to 53%, and greater than or equal to 49% and less than or equal to 51%.

[0052] Al2O3 is an intermediate oxide that helps improve the chemical stability of the glass network structure. However, if the Al2O3 content exceeds a certain value, it will lead to a high elastic modulus of the glass itself, affecting the glass's bendability. In this embodiment, the lower limit of the Al2O3 content is 8% and the upper limit is 22%. In some embodiments, the glass composition may include Al2O3 in amounts such as 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, and 22%. In some embodiments, the glass composition may also include Al2O3 in amounts such as greater than or equal to 9% and less than or equal to 21%, greater than or equal to 10% and less than or equal to 20%, greater than or equal to 11% and less than or equal to 19%, greater than or equal to 12% and less than or equal to 18%, greater than or equal to 13% and less than or equal to 17%, and greater than or equal to 14% and less than or equal to 16%. In a preferred embodiment of this embodiment, the content of Al2O3 is greater than or equal to 12% and less than or equal to 18%.

[0053] P2O5 is a minor component of the glass network structure. Existing as tetrahedrons within the glass network, P2O5 forms the structural network of phosphate glass, providing a good fluxing effect and improving the glass's dispersion coefficient and UV transmittance. However, excessive addition can easily cause phase separation and reduce the glass's chemical stability. Furthermore, the addition of P2O5 can significantly reduce the glass's elastic modulus and improve its bending properties. In this embodiment, the lower limit of the P2O5 content is greater than 0 and the upper limit is 20%. In some embodiments, the glass composition may include P2O5 in an amount such as 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20%. In some embodiments, the glass composition may further include P2O5 in an amount such as greater than or equal to 1% and less than or equal to 19%, greater than or equal to 2% and less than or equal to 18%, greater than or equal to 3% and less than or equal to 17%, greater than or equal to 4% and less than or equal to 16%, greater than or equal to 5% and less than or equal to 15%, greater than or equal to 6% and less than or equal to 14%, greater than or equal to 7% and less than or equal to 13%, greater than or equal to 8% and less than or equal to 12%, or greater than or equal to 9% and less than or equal to 11%. In a preferred embodiment of this embodiment, the content of P2O5 is greater than or equal to 7% and less than or equal to 16%; further preferably, the content of P2O5 is greater than or equal to 8% and less than or equal to 14%.

[0054] RO is a divalent oxide such as MgO, BaO, SrO, CaO, or ZnO. The flexible glass of this embodiment includes at least one of these divalent oxides, which can regulate the glass's viscosity and chemical stability at medium and low temperatures. Furthermore, the addition of ZnO can significantly reduce the glass's elastic modulus, improving its bendability. The content of MgO, BaO, SrO, and CaO should not be too high, as this can increase the glass's elastic modulus and reduce its bendability. In this embodiment, the lower limit of the RO content is greater than 0 and the upper limit is 16%. In some embodiments, the glass composition may include RO in amounts such as 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, or 16%. In some embodiments, the glass composition may also include RO in amounts such as greater than or equal to 1% and less than or equal to 16%, greater than or equal to 2% and less than or equal to 15%, greater than or equal to 3% and less than or equal to 14%, greater than or equal to 4% and less than or equal to 13%, greater than or equal to 5% and less than or equal to 12%, greater than or equal to 6% and less than or equal to 11%, greater than or equal to 7% and less than or equal to 10%, or greater than or equal to 8% and less than or equal to 9%. In a preferred embodiment of this embodiment, the RO content is greater than or equal to 4% and less than or equal to 10%.

[0055] In an optional embodiment of this embodiment, the contents of the aforementioned divalent oxides may be as follows: ZnO (greater than 0 and less than or equal to 5%); MgO (greater than or equal to 0 and less than or equal to 5%); CaO (greater than or equal to 0 and less than or equal to 5%); SrO (greater than or equal to 0 and less than or equal to 6%); and BaO (greater than or equal to 0 and less than or equal to 8%). Preferred contents are as follows: ZnO (greater than 2% and less than or equal to 4%); MgO (greater than or equal to 2% and less than or equal to 3%); CaO (greater than or equal to 2% and less than or equal to 3%); SrO (greater than or equal to 3% and less than or equal to 5%); and BaO (greater than or equal to 3% and less than or equal to 6%). It is worth noting that, in addition to the aforementioned content design of 0 < ZnO ≤ 5% in this embodiment, the aforementioned content design of 0 < P2O5 ≤ 20% can minimize the elastic modulus of the glass itself, thereby improving the bendability of the glass product.

[0056] R2O is an alkali metal oxide, including at least one of Li2O, Na2O, and K2O. It can provide free oxygen, break bonds, reduce the viscosity of the glass, make the glass easier to melt, and can be used as a glass flux. Moreover, they are oxides outside the glass network, residing in the holes of the glass structure network in the form of ions. Ion exchange can be carried out during the chemical strengthening stage to ensure that the glass has a sufficiently high surface compressive stress. In this embodiment, the lower limit of the R2O content is 17.8% and the upper limit is 28%. In some embodiments, the glass composition may include R2O in amounts such as 17.8%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, and 28%. In some embodiments, the glass composition may also include R2O in amounts such as greater than or equal to 18% and less than or equal to 27%, greater than or equal to 19% and less than or equal to 26%, greater than or equal to 20% and less than or equal to 25%, greater than or equal to 21% and less than or equal to 24%, and greater than or equal to 22% and less than or equal to 23%. In a preferred embodiment of this embodiment, the R2O content is greater than or equal to 17.8% and less than or equal to 23%, and more preferably, the R2O content is greater than or equal to 18.5% and less than or equal to 22%.

[0057] The fining agent includes at least one of SnO2, CeO2, NaCl, and Na2SO4. It can reduce the number of bubbles remaining in the glass during the melting process, clarifying the glass liquid and reducing defects such as bubbles within the glass. In this embodiment, the lower limit of the fining agent content is greater than 0 and the upper limit is 0.3%. In some embodiments, the glass composition may include fining agents in amounts such as 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, and 0.3%. In some embodiments, the glass composition may also include fining agents in amounts such as greater than or equal to 0.05% and less than or equal to 0.25%, or greater than or equal to 0.1% and less than or equal to 0.2%. In a preferred embodiment of this embodiment, the fining agent content is greater than or equal to 0.25% and less than or equal to 0.3%.

[0058] In an optional embodiment of this embodiment, the total content of SiO2 and Al2O3 is greater than or equal to 50% and less than or equal to 75%. That is, the lower limit of the total content of SiO2 and Al2O3 in this embodiment is 50% and the upper limit is 75%. In some embodiments, the total content of SiO2 and Al2O3 contained in the glass composition is as follows: 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%; in some embodiments, the total content of SiO2 and Al2O3 contained in the glass composition may also be as follows: greater than or equal to 52% and less than or equal to 73%, greater than or equal to 54% and less than or equal to 71%, greater than or equal to 56% and less than or equal to 69%, greater than or equal to 58% and less than or equal to 67%, greater than or equal to 60% and less than or equal to 65%, greater than or equal to 62% and less than or equal to 63%. In the preferred embodiment of this embodiment, the total content of SiO2 and Al2O3 is greater than or equal to 55% and less than or equal to 70%.

[0059] It's worth noting that SiO2 and Al2O3 are the primary components of the network structure in glass. Controlling the combined SiO2 and Al2O3 content within a certain range not only ensures the integrity of the network structure and the economic efficiency of glass melting, but also provides the appropriate network void size and chemical stability required for ion exchange during the chemical strengthening process, and ensures that the glass can store the maximum energy generated during the compressive stress release process. The combined SiO2 and Al2O3 content, based on the improved design of this embodiment, ensures the glass's inherent chemical stability while also storing the stress generated after chemical strengthening without spontaneous explosion.

[0060] In an optional embodiment of this embodiment, the alkali metal oxides described above may specifically include: Na2O at a concentration of greater than or equal to 17.8% and less than or equal to 24%; Li2O at a concentration of greater than or equal to 0% and less than or equal to 3%; and K2O at a concentration of greater than or equal to 0% and less than or equal to 6%. Furthermore, the preferred content of Na2O is greater than or equal to 17.8% and less than or equal to 20%; the preferred content of K2O is greater than or equal to 2% and less than or equal to 4%; and the preferred content of Li2O is greater than or equal to 0.5% and less than or equal to 2%.

[0061] It is worth mentioning that the addition of Na2O is intended to achieve the exchange of sodium ions in the glass with potassium ions in the strengthening salt during the chemical strengthening process, thereby achieving compressive stress on the surface and inside the glass through the "plugging" effect. The Na2O content partially determines the efficiency of the ion exchange process and the maximum surface compressive stress that can be generated. Based on the Na2O content of the improved design of this embodiment, it can ensure that the glass has a sufficiently high surface stress after chemical strengthening. It should also be noted that the addition of a small amount of K2O and Li2O can improve the chemical stability of the glass through the mixed alkali effect. However, if the addition amount is too high, the glass viscosity will be low, which will cause crystallization and is not conducive to the implementation of one-step molding production methods such as the overflow down-draw method. It should also be noted that when the molar ratio of Na2O to Al2O3 in the glass is greater than 1, aluminum oxide tetrahedrons are formed and form a continuous structural network with silicon oxide tetrahedrons. When the molar ratio of Na2O to Al2O3 in the glass is less than 1, octahedrons are formed, which are external to the network and located in the cavities of the silicon oxide structural network.

[0062] Next, this embodiment also describes the sources of the above-mentioned oxides, wherein the source of SiO2 is quartz sand; the source of Al2O3 is aluminum oxide, aluminum hydroxide, or aluminum nitrate; the source of P2O5 is Al(PO3)3 and (NH4)2HPO4; the source of MgO is MgO or Mg(OH)2; the source of ZnO is ZnO or zinc nitrate; the source of BaO is BaO; the source of CaO is CaO or CaCO3; the source of SrO is SrO; the source of Na2O is Na2CO3 or NaNO3; the source of K2O is K2CO3 or KNO3; and the source of Li2O is Li2CO3 or LiNO3.

[0063] In an optional implementation manner of this embodiment, the flexible glass satisfies the following relationship:

[0064] Ef=9.8*(6.52*n siO2 +(0.064*(n SiO2 +n Al2O3 )-3.9)*n P2O5 +11*n Al2O3 +17*n MgO +12.5*n CaO +8.5*n BaO +5*n ZnO +15*n Li2O +4.5*n Na2O +1*n K2O ),

[0065] 47.56≤Ef≤63.12;

[0066] Wherein, Ef represents a flexibility measurement index, that is, an index for measuring the flexibility of glass products, and n represents the molar percentage content corresponding to each oxide. It is worth mentioning that the sum coefficient of each oxide involved in the above relationship (that is, 9.8, 6.52, 0.064, etc. in the formula) is linearly related to the bond force between each isovalent oxide cation, and its essence is that the strength of the bond directly determines the interatomic binding energy and network rigidity, while taking into account the local bond force offset caused by the coordination field disturbance. High alkali metal content will weaken the bond force superposition effect, and local bond angle fluctuations will destroy the linear correlation, but the application has carried out first-principles calculations for dynamic calibration. Within the composition range advocated by the above relationship designed in the present application, the flexibility of the glass product is well improved.

[0067] This embodiment optimizes the content of various oxide components in the glass composition, ensuring a flexibility index within a range of 47 or greater and 64 or less. This ensures that the glass product has a low elastic modulus and excellent bending properties. In a preferred embodiment of this embodiment, 50 ≤ Ef ≤ 60, and more preferably, 51 ≤ Ef ≤ 55, resulting in even better bending properties for the glass product.

[0068] In an optional implementation manner of this embodiment, the flexible glass satisfies the following relationship:

[0069] η=(60.08*n SiO2 +141.94*n P2O5 +101.96*n Al2O3 +40.3*n MgO +56.08*n CaO +153.33*n BaO +81.38*n ZnO +29.98*n Li2O +61.98*n Na2O +94.2*n K2O ) / ((28.25-0.031*n SiO2 )*n SiO2 +64*n P2O5 +42.7*n Al2O3 +12.5*n MgO +14.4*n CaO +17*n BaO +7.5*n ZnO +8*n Li2O +19.5*n Na2O +42*n K2O ),

[0070] 2.31≤η≤2.55;

[0071] Among them, η represents a bendability measurement index, which can also be understood as an atomic stacking index that measures the bending performance of glass products, and n represents the molar percentage content of each oxide. It is worth mentioning that the sum coefficient of each oxide involved in the above relationship (that is, 60.08, 141.94, 101.96, 40.3, etc. in the formula) is linearly related to the radius of each oxide cation of the same value, which is subject to the stacking efficiency and coordination number. The present application performs a local distortion correction in the glassy structure, the core of which is that the difference in ionic radius directly affects the atomic stacking degree and structural stability. This linear trend is dynamically corrected in combination with factors such as coordination number and stacking efficiency. For example, a structural distortion factor is introduced to compensate for the high-coordinated cations (such as Al 3+ ) due to the weakening of the linear correlation caused by local bond angle distortion; combined with molecular dynamics simulations, the linear superposition of perturbations caused by competitive coordination effects between different ions was quantitatively calibrated. Within the composition range advocated by the above relationship designed in this application, the atomic packing degree that affects the bending performance of glass products is well reflected.

[0072] This embodiment optimizes the content of various oxide components in the glass composition, ensuring that the bendability index is within a range of greater than or equal to 2.3 and less than or equal to 2.6, ensuring that the glass product has a low elastic modulus and excellent bendability. In a preferred embodiment of this embodiment, 2.4 ≤ η ≤ 2.5, resulting in even better bendability of the glass product.

[0073] It is worth mentioning that in the related art, in order to achieve the bendable mechanical properties of glass products, an acid process is usually used to chemically thin the glass sheet to 30μm or even thinner to achieve the purpose of glass flexibility. However, the thinner the glass thickness, the lower the mechanical strength. Based on the optimized design of the content of the oxide component in the glass components of this embodiment, starting from the glass formulation level, the elastic modulus of the glass product is effectively reduced and the bending performance of the glass product is improved. Therefore, the thickness of the flexible glass can preferably be 0.05-0.1mm, and more preferably 0.05-0.075mm, and no thinning process is required. Since the thickness of the glass product is thicker than that of conventional flexible glass, the mechanical strength performance of the glass product is guaranteed. In practical applications, it can ensure both bending performance and effectively prevent breakage.

[0074] Next, an embodiment of the present application also provides a flexible glass product, which is obtained by ion exchange treatment (also known as chemical strengthening treatment) of the flexible glass provided by any implementation method in the aforementioned embodiments, and the flexible glass product includes a compressive stress layer extending from the surface to the depth of the ion exchange layer.

[0075] It is worth mentioning that ion exchange treatment refers to placing the flexible glass in a chemical strengthening salt bath for chemical strengthening, so that the flexible glass forms a compressive stress layer and a tensile stress layer. The chemical strengthening salt bath includes one or more of a sodium ion salt bath, a potassium ion salt bath, and a lithium ion salt bath.

[0076] Corresponding to the aforementioned product embodiment, an embodiment of the present application further provides a method for preparing flexible glass, which specifically includes:

[0077] Step A: Mix the raw materials uniformly according to the glass formula and then melt them at a preset melting temperature and melting time to obtain glass liquid;

[0078] Step B: gradually cooling the glass liquid to a target temperature and then forming it, and then undergoing mechanical processing to obtain flexible glass.

[0079] The flexible glass prepared in this embodiment has a thickness of 0.03 to 0.1 mm and an elastic modulus of 55.40 to 64.35 GPa. In addition, its components, measured in molar percentage, include: SiO2 greater than or equal to 35% and less than or equal to 65%; Al2O3 greater than or equal to 8% and less than or equal to 22%; P2O5 greater than 0 and less than or equal to 20%; RO greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO; R2O greater than or equal to 17.8% and less than or equal to 28%, and R2O includes at least one of Li2O, Na2O, and K2O; and a clarifier greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

[0080] In an optional implementation of this embodiment, the melting temperature is 1500-1650° C., the melting time is greater than or equal to 30 minutes, and the target temperature is 900-1650° C. It should be further noted that when the overflow down-draw molding method is adopted in this embodiment, the target temperature is 900-1200° C., and when the casting molding method is adopted, the target temperature is 1500-1650° C.

[0081] It is worth noting that because the flexible glass of this embodiment maintains good bending properties even at a thickness exceeding 0.03mm, the thickness of conventional flexible glass, it does not require post-thinning processes such as acid thinning or polishing after forming, thereby simplifying the processing process and reducing production costs. Preferably, the flexible glass of this embodiment with a thickness of 0.05-0.075mm does not require any thinning process.

[0082] In an optional implementation manner of this embodiment, the step of gradually cooling the glass liquid to the target temperature and then molding it to obtain flexible glass includes: gradually cooling the glass liquid to the target temperature, and then molding it using an overflow down-draw method or a narrow slot down-draw method to obtain flexible glass.

[0083] In practical applications, glass forming methods include but are not limited to float glass, overflow down-draw, slot down-draw, rolling, and secondary down-draw. It is worth mentioning that the viscosity-temperature characteristics of the flexible glass of this embodiment during the forming stage meet the following indicators: the temperature range is 442-1637°C, the viscosity range is 10 14.5 ~10 2.3 dPa·s; and the viscosity-temperature characteristics satisfy the following fitting formula:

[0084]

[0085] Wherein, Log P represents viscosity, T represents temperature, a, b, and c represent fitting constants, the value range of a is -3.80 to -2.39, the value range of b is 5823.56 to 9179.76, and the value range of c is 208.25 to 539.58.

[0086] In addition, the material property refers to the temperature difference required for a specific viscosity change. The material property of the flexible glass in this embodiment during the molding process meets the following requirements: the viscosity changes from 10 7.65 dPa·s changes to 10 4.4 The temperature difference corresponding to dPa·s ranges from 265°C to 340°C. In a preferred embodiment, the viscosity increases from 10 7.65 dPa·s changes to 10 4.4 The temperature difference corresponding to dPa·s ranges from 245℃ to 320℃. In addition, there is no exothermic peak on the DSC curve of flexible glass. It can be understood that in the process of preparing flexible glass, within the temperature range of 528~1226℃, 10 11.5 ~10 4.4 There is no obvious crystallization within the viscosity range of 10 dPa·s.

[0087] It is worth mentioning that the temperature-viscosity characteristics of the glass currently provided in the relevant technology do not match the characteristics of the molding method. The reason for this is that when designing the glass formula in the relevant technology, more consideration is given to the mechanical and optical properties of the glass, without taking into account the relevant requirements of engineering molding. Therefore, when preparing flexible glass, the relevant technology cannot use a one-time drawing molding method to produce flexible glass that meets the required thickness. Therefore, an additional thinning process is required to achieve the target thickness, and the production complexity is relatively high.

[0088] In this embodiment, the viscosity-temperature characteristics of the glass are fully considered in the glass formula design. Under the premise of meeting the above-mentioned viscosity-temperature characteristics of this embodiment, the production method of the flexible glass of this embodiment can be expanded, that is, low-cost and efficient one-time molding production methods such as overflow down-draw method and narrow slot down-draw method can be used.

[0089] It should be noted that the relationship between glass viscosity and temperature plays a decisive role in the glass manufacturing and processing process. During the glass manufacturing process, specific viscosity-temperature characteristics must be followed to achieve the processing goals. The viscosity-temperature characteristic curve of glass has a series of characteristic temperature points. As an optional embodiment, the viscosity-temperature characteristics of the flexible glass of this embodiment during the forming stage are as follows: the clarification temperature is 1410-1637℃, and the corresponding viscosity is 10 2.3 dPa·s; melting temperature is 1363~1581℃, corresponding to viscosity of 10 2.5 dPa·s; stirring temperature is 1259~1455℃, corresponding to viscosity of 10 3 dPa·s; the initial molding temperature is 1036~1226℃, and the corresponding viscosity is 10 4.4 dPa·s; the termination molding temperature is 907~1104℃, and the corresponding viscosity is 10 5.5 dPa·s; softening point temperature is 727~933℃, corresponding to viscosity of 10 7.65 dPa·s; expansion softening point temperature is 528~750℃, corresponding to viscosity of 10 11.5 dPa·s; the annealing point temperature is 476~702℃, and the corresponding viscosity is 10 13 dPa·s; annealing temperature is 463~691℃, corresponding to viscosity of 10 13.4 dPa·s; the strain point temperature is 442~662℃, and the corresponding viscosity is 10 14.5 dPa·s.

[0090] Next, an embodiment of the present application further provides a method for preparing a flexible glass product, which specifically comprises: immersing the flexible glass provided by any implementation method in the aforementioned embodiments in a chemically strengthened salt bath for ion exchange treatment to obtain a flexible glass product.

[0091] In an optional embodiment of this embodiment, the chemical strengthening salt bath includes, by mass percentage, the following: KNO3 (greater than or equal to 60% and less than or equal to 100%), KOH (greater than or equal to 0 and less than or equal to 5%), K2CO3 (greater than or equal to 0 and less than or equal to 5%), NaNO3 (greater than or equal to 0 and less than or equal to 50%), NaOH (greater than or equal to 0 and less than or equal to 2%), Na2CO3 (greater than or equal to 0 and less than or equal to 3%), LiNO3 (greater than or equal to 0 and less than or equal to 10%), and Li2CO3 (greater than or equal to 0 and less than or equal to 3%). Furthermore, one or more additives selected from the group consisting of metasilicic acid, diatomaceous earth, and alumina may be added to the chemical strengthening salt bath of this embodiment. Accordingly, in an optional embodiment of this embodiment, the temperature of the chemical strengthening salt bath is 350-480°C, and the ion exchange treatment duration is 10-60 minutes.

[0092] In some embodiments, the chemical strengthening salt bath comprises: 50 wt% KNO3, 5 wt% KOH, 30 wt% NaNO3, 2 wt% NaOH, 3 wt% Na2CO3, 8 wt% LiNO3, 2 wt% Li2CO3; in other embodiments, the chemical strengthening salt bath comprises 50 wt% KNO3, 5 wt% KOH, 30 wt% NaNO3, 1 wt% NaOH, 2 wt% Na2CO3, 10 wt% LiNO3, 2 wt% Li2CO3; in other embodiments, the chemical strengthening salt bath comprises 60 wt% KNO3, 4 wt% KOH, 1 wt% K2CO3, 20 wt% NaNO3, 1 wt% NaOH, 3 wt% Na2CO3, 8 wt% LiNO3, 3 wt% Li2CO3; in other embodiments, the chemical strengthening salt bath comprises: Including 70wt% KNO3, 3wt% KOH, 2wt% K2CO3, 20wt% NaNO3, 3wt% LiNO3, and 2wt% Li2CO3; in other embodiments, the chemically strengthened salt bath includes 40wt% KNO3, 4wt% KOH, 1wt% K2CO3, 50wt% NaNO3, 1wt% Na2CO3, and 4wt% LiNO3; in other embodiments, the chemically strengthened salt bath includes 80wt% KNO3, 1wt% KOH, 4wt% K2CO3, 10wt% NaNO3, and 5wt% LiNO3; in other embodiments, the chemically strengthened salt bath includes 90wt% KNO3, 2wt% KOH, 3wt% K2CO3, and 5wt% LiNO3; in other embodiments, the chemically strengthened salt bath includes 100wt% KNO3.

[0093] In this embodiment, the formed flexible glass is chemically strengthened to form a compressive stress layer extending from the surface to the compression depth. The peak compressive stress value of this compressive stress layer is 350 to 900 MPa, and the depth of the compressive stress layer is 5 to 25 μm, effectively enhancing the mechanical properties of the glass product, such as impact strength and hardness. It is worth noting that this embodiment uses an FSM-6000X glass surface stress meter manufactured by Orihara to test the peak compressive stress value and depth of the compressive stress layer. The measurement method used can adopt the optical waveguide method, the scattered light photoelastic method, or a simplified measurement method combining the optical waveguide method with the scattered light photoelastic method.

[0094] Next, in order to illustrate the technical effect of the flexible glass of this embodiment, the present application conducted tests on flexible glasses with a thickness of 0.05 mm and different components and contents to determine the characteristics of each flexible glass. Among them, Examples 1 to 13 in Table 1 show the components and corresponding contents of flexible glasses of various different compositions of the present application, Table 2 is the elastic modulus test results of the flexible glasses corresponding to Examples 1 to 13 in Table 1, Table 3 is the surface compressive stress test results of the flexible glasses corresponding to Examples 1 to 13 in Table 1, and Table 4 is the stress layer depth test results of the flexible glasses corresponding to Examples 1 to 13 in Table 1.

[0095] Table 1

[0096]

[0097]

[0098] Table 2

[0099]

[0100] Table 3

[0101]

[0102] Table 4

[0103]

[0104] In addition, the present application also describes the salt bath formula and temperature conditions used in the experiments in Tables 2 to 4, wherein the salt bath used in Example 1 includes: 50wt% KNO3, 5wt% KOH, 30wt% NaNO3, 2wt% NaOH, 3wt% Na2CO3, 8wt% LiNO3, 2wt% Li2CO3, and the salt bath temperature is 480°C; the salt bath used in Examples 2, 3 and 13 includes: 50wt% KNO3, 5wt% KOH, 30wt% NaNO 3, 1wt% NaOH, 2wt% Na2CO3, 10wt% LiNO3, 2wt% Li2CO3, and the salt bath temperature is 460°C; the salt bath used in Example 4, Example 5 and Example 12 includes: 60wt% KNO3, 4wt% KOH, 1wt% K2CO3, 20wt% NaNO3, 1wt% NaOH, 3wt% Na2CO3, 8wt% LiNO3, 3wt% Li2CO3, and the salt bath temperature is 430°C; Example 6 and Example The salt bath used in Example 8 includes: 70wt% KNO3, 3wt% KOH, 2wt% K2CO3, 20wt% NaNO3, 3wt% LiNO3, 2wt% Li2CO3, and the temperature of the salt bath in Example 6 is 430°C, and the temperature of the salt bath in Example 8 is 390°C; the salt bath used in Example 7 includes: 40wt% KNO3, 4wt% KOH, 1wt% K2CO3, 50wt% NaNO3, 1wt% Na2CO3, 4wt% LiNO3, and the salt bath temperature is 430°C, and the temperature of the salt bath in Example 8 is 390°C. The bath temperature is 410°C; the salt bath used in Example 9 includes: 80wt% KNO3, 1wt% KOH, 4wt% K2CO3, 10wt% NaNO3, 5wt% LiNO3, and the salt bath temperature is 350°C; the salt bath used in Example 10 includes: 90wt% KNO3, 2wt% KOH, 3wt% K2CO3, 5wt% LiNO3, and the salt bath temperature is 350°C; the salt bath used in Example 11 includes: 100wt% KNO3, and the salt bath temperature is 370°C.

[0105] Comparison of the test data for Examples 1 to 13 in Table 2 above demonstrates that, for the flexible glasses of the present application with different formulations provided in Table 1 above, the optimized contents of P2O5 and ZnO keep the elastic moduli of both the unstrengthened and strengthened flexible glasses within a relatively low range. Specifically, the elastic modulus of the unstrengthened flexible glass ranged from 56.37 to 64.72 GPa, the elastic modulus of the flexible glass strengthened for 20 minutes ranged from 55.40 to 64.35 GPa, the elastic modulus of the flexible glass strengthened for 40 minutes ranged from 55.90 to 63.82 GPa, and the elastic modulus of the flexible glass strengthened for 60 minutes ranged from 56.16 to 63.27 GPa. Furthermore, the flexible glasses of the corresponding formulations in Examples 1 to 13 were subjected to a dynamic bending test of 1 million cycles at a bending radius of 1.5 mm, with all tests passing. It can be seen that the glass formula optimized in this application effectively reduces the elastic modulus of the flexible glass, thereby having relatively excellent bendable mechanical properties.

[0106] Comparison of the experimental data from Examples 1 to 13 in Tables 3 and 4 above indicates that, for the flexible glasses of the present application with different formulations provided in Table 1 above, by optimizing the Na2O content and the combined content of SiO2 and Al2O3, the glasses exhibit sufficiently high surface compressive stress and stress layer depth after chemical strengthening. Specifically, the surface compressive stress of the flexible glass strengthened for 20 minutes ranged from 559.07 to 848.78 MPa, and the stress layer depth ranged from 9.24 to 14.18 μm; the surface compressive stress of the flexible glass strengthened for 40 minutes ranged from 516.97 to 845.40 MPa, and the stress layer depth ranged from 12.83 to 18.89 μm; and the surface compressive stress of the flexible glass strengthened for 60 minutes ranged from 504.76 to 842.12 MPa, and the stress layer depth ranged from 15.53 to 23.52 μm. In addition, this embodiment also conducted an 80mm pen drop test using an 8g ballpoint pen with a 0.5mm ballpoint pen. The flexible glasses formulated in Examples 1 to 13 all passed the test. This demonstrates that the optimized glass formulation of this application ensures that the flexible glass possesses excellent mechanical strength and is not susceptible to breakage in practical applications.

[0107] Based on the above scheme of the present application, the thickness of the flexible glass is 0.03~0.1mm, and the elastic modulus is 55.40~64.35GPa. It includes SiO2 greater than or equal to 35mol% and less than or equal to 65mol%, and Al2O3 greater than or equal to 8mol% and less than or equal to 22mol%, so as to ensure that the glass itself has good chemical stability to ensure stress storage capacity; and the flexible glass also includes P2O5 greater than 0 and less than or equal to 20mol%, so as to reduce the elastic modulus of the glass itself as much as possible and improve the bendable mechanical properties; in addition, the flexible glass also includes R2O greater than or equal to 17.8mol% and less than or equal to 28mol%, and R2O includes at least one of Li2O, Na2O, and K2O, so as to ensure that the glass has a higher surface compressive stress after chemical strengthening. Through the implementation of the solution of the present application, while the mechanical strength of the glass is guaranteed due to its certain thickness, the flexibility is also guaranteed due to its low elastic modulus, making it suitable for engineering molding and large-scale production. That is, the flexible glass provided by the solution of the present application has both mechanical strength and flexibility.

[0108] It is also worth mentioning that due to the above-mentioned performance advantages of the flexible glass provided in the embodiments of the present application, it can be widely used in protective covers of folding screen electronic devices, smart wearable devices, etc.

[0109] Finally, it should be noted that in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0110] The above is a description of the flexible glass, flexible glass products and preparation methods provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, equivalent substitutions made in the specific implementation methods and application scopes should all be covered by the claims of this application. In summary, the content of this specification should not be understood as a limitation on the scheme of this application.

Claims

1. A flexible glass, characterized in that: The flexible glass has a thickness of 0.03 to 0.1 mm and an elastic modulus of 55.40 to 64.35 GPa. Its components, expressed in molar percentage, include: SiO2 greater than or equal to 35% and less than or equal to 65%; Al2O3 greater than or equal to 8% and less than or equal to 22%; P2O5 greater than 0 and less than or equal to 20%; RO is greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO; R2O is greater than or equal to 17.8% and less than or equal to 28%, and R2O includes at least one of Li2O, Na2O, and K2O; The amount of a clarifier is greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

2. The flexible glass according to claim 1, characterized in that The flexible glass satisfies the following relationship: Ef=9.8*(6.52*n SiO2 +(0.064*(n SiO2 +n Al2O3 )-3.9)*n P2O5 +11*n Al2O3 +17*n MgO +12.5*n CaO +8.5*n BaO +5*n ZnO +15*n Li2O +4.5*n Na2O +1*n K2O ), 47.56≤Ef≤63.12; Wherein, Ef represents the flexibility measurement index, and n represents the molar percentage content of each oxide.

3. The flexible glass according to claim 2, characterized in that 50≤Ef≤60.

4. The flexible glass according to claim 1, characterized in that The flexible glass satisfies the following relationship: η=(60.08*n SiO2 +141.94*n P2O5 +101.96*n Al2O3 +40.3*n MgO +56.08*n CaO +153.33*n BaO +81.38*n ZnO +29.98*n Li2O +61.98*n Na2O +94.2*n K2O ) / ((28.25–0.031*n SiO2 )*n SiO2 +64*n P2O5 +42.7*n Al2O3 +12.5*n mgO +14.4*n CaO +17*n BaO +7.5*n ZnO +8*n Li2O +19.5*n Na2O +42*n K2O ), 2.31≤η≤2.55; Here, η represents the bendability measurement index, and n represents the molar percentage content of each oxide.

5. The flexible glass according to claim 4, characterized in that 2.4≤η≤2.

5.

6. The flexible glass according to claim 1, characterized in that The components thereof include, by mole percentage, greater than or equal to 7% and less than or equal to 16% of P2O5.

7. The flexible glass according to claim 1, characterized in that The components thereof include, by mole percentage, greater than or equal to 8% and less than or equal to 14% of P2O5.

8. The flexible glass according to claim 1, characterized in that The components thereof include, by mole percentage, greater than or equal to 17.8% and less than or equal to 23% of R2O.

9. The flexible glass according to claim 1, characterized in that The components thereof include, by mole percentage, greater than or equal to 18.5% and less than or equal to 22% of R2O.

10. The flexible glass according to claim 1, characterized in that The components thereof include, by mole percentage, greater than or equal to 12% and less than or equal to 18% of Al2O3; and / or greater than or equal to 4% and less than or equal to 10% of RO; and / or greater than or equal to 0.25% and less than or equal to 0.3% of a clarifier.

11. The flexible glass according to claim 1, characterized in that The total content of SiO2 and Al2O3 is greater than or equal to 50% and less than or equal to 75% in terms of molar percentage.

12. The flexible glass according to claim 1, characterized in that The total content of SiO2 and Al2O3 is greater than or equal to 55% and less than or equal to 70% in terms of molar percentage.

13. The flexible glass according to claim 1, characterized in that Its components, expressed in mole percentage, include: ZnO greater than 0 and less than or equal to 5%; MgO greater than or equal to 0 and less than or equal to 5%; CaO greater than or equal to 0 and less than or equal to 5%; SrO greater than or equal to 0 and less than or equal to 6%; BaO is greater than or equal to 0 and less than or equal to 8%.

14. The flexible glass according to claim 1, characterized in that Its components, expressed in mole percentage, include: ZnO greater than 2% and less than or equal to 4%; MgO greater than or equal to 2% and less than or equal to 3%; CaO greater than or equal to 2% and less than or equal to 3%; SrO greater than or equal to 3% and less than or equal to 5%; BaO is greater than or equal to 3% and less than or equal to 6%.

15. The flexible glass according to any one of claims 1 to 14, characterized in that: The thickness of the flexible glass is 0.05-0.075 mm and does not need to be processed by a thinning process.

16. A flexible glass product, characterized in that: The flexible glass product is obtained by subjecting the flexible glass according to any one of claims 1 to 15 to ion exchange treatment.

17. A method for preparing flexible glass, characterized in that: include: The raw materials are mixed evenly according to the glass formula and then melted at a preset melting temperature and melting time to obtain glass liquid; The glass liquid is gradually cooled to a target temperature and then formed, and then subjected to mechanical processing to obtain flexible glass; The flexible glass has a thickness of 0.03 to 0.1 mm and an elastic modulus of 55.40 to 64.35 GPa. Its components, in molar percentage, include: SiO2 greater than or equal to 35% and less than or equal to 65%; Al2O3 greater than or equal to 8% and less than or equal to 22%; P2O5 greater than 0 and less than or equal to 20%; RO greater than 0 and less than or equal to 16%, and RO includes at least one of MgO, CaO, SrO, BaO, and ZnO; R2O greater than or equal to 17.8% and less than or equal to 28%, and R2O includes at least one of Li2O, Na2O, and K2O; and a clarifier greater than 0 and less than or equal to 0.3%, and the clarifier includes at least one of SnO2, CeO2, NaCl, and Na2SO4.

18. The method for preparing flexible glass according to claim 17, characterized in that: The smelting temperature is 1500-1650°C, the smelting time is greater than or equal to 30 minutes, and the target temperature is 900-1650°C.

19. The method for preparing flexible glass according to claim 17, wherein: The flexible glass having a thickness of 0.05 to 0.075 mm is prepared without undergoing a thinning process.

20. A method for preparing a flexible glass product, characterized in that: include: Immersing the flexible glass according to any one of claims 1 to 15 in a chemically strengthened salt bath for ion exchange treatment to obtain a flexible glass product; The chemical strengthening salt bath includes, by mass percentage, the following: KNO3 greater than or equal to 60% and less than or equal to 100%, KOH greater than or equal to 0 and less than or equal to 5%, K2CO3 greater than or equal to 0 and less than or equal to 5%, NaNO3 greater than or equal to 0 and less than or equal to 50%, NaOH greater than or equal to 0 and less than or equal to 2%, Na2CO3 greater than or equal to 0 and less than or equal to 3%, LiNO3 greater than or equal to 0 and less than or equal to 10%, and Li2CO3 greater than or equal to 0 and less than or equal to 3%.

21. The method for preparing chemically strengthened flexible glass according to claim 20, wherein: The temperature of the chemical strengthening salt bath is 350-480° C., and the duration of the ion exchange treatment is 10-60 minutes.

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