Spinel glass ceramic and use thereof

Abstract

The present application provides a spinel glass ceramic and a use thereof. By providing the spinel glass ceramic with a specific composition and crystal phase structure, not only is the spinel glass ceramic endowed with high intrinsic strength, but also it can be ensured that the spinel glass ceramic can obtain a desired stress structure after a chemical strengthening treatment, especially an ultra-high pressure compressive stress layer depth and a relatively large deep stress. The spinel glass ceramic can be prepared into enhanced spinel glass ceramic having high mechanical strength and damage resistance.

Description

A spinel glass-ceramic and its application This application claims the priority of a Chinese patent application with the application number 2023118027864 and the application title "A spinel glass-ceramic and its application" filed with the China National Intellectual Property Administration on December 25, 2023, and a Chinese patent application with the application number 2024107413812 and the application title "A spinel glass-ceramic and its application" filed with the China National Intellectual Property Administration on June 7, 2024. The entire content of which is incorporated herein by reference. Technical Field This application relates to the technical field of glass-ceramics, and particularly to a spinel glass-ceramic and its application. Background Art Common situations where the protective glass of electronic devices breaks include drop breakage caused by falling, extrusion breakage caused by contact with other objects, or impact breakage caused by the fall of heavy objects. Analyzing the process of drop breakage, it is generally due to the collision of the glass surface with sharp objects (such as fine sand, cement, small stones) with a hardness equivalent to or greater than that of the glass, resulting in local damage and forming a hemispherical crack propagation source at the damage point. Part of the collision energy is attenuated, and the remaining energy further expands. When the surface compressive stress level of the glass is insufficient to offset the remaining energy, the crack propagation will pass through the glass surface area. When the longitudinal crack penetrates the depth of the compressive stress layer and reaches the tensile stress layer area, the crack will rapidly expand in the tensile stress area, causing the crack to penetrate the entire glass, resulting in glass breakage or fracture. Analyzing the process of extrusion breakage or impact breakage, it is mainly that the extrusion or collision force is greater than the surface compressive stress level of the glass, resulting in the glass being unable to offset the energy of extrusion and impact. It can be seen that the surface stress level, the depth of the compressive stress layer, and the deep stress situation of glass products are closely related to their anti-drop damage performance, anti-extrusion damage performance, and anti-impact damage performance. When the depth of the compressive stress layer is constant, the greater the deep stress, the more the surface compressive stress level can offset the remaining energy of drop collision, extrusion, or impact. When the surface compressive stress level is insufficient to offset the remaining energy of drop collision, extrusion, or impact, the deeper the compressive stress layer depth of the glass, the more conducive it is to offsetting the energy driving crack propagation. Therefore, in order to further improve the anti-drop impact performance and anti-extrusion performance of glass-ceramics with spinel as the main crystal phase, it is necessary to develop a spinel glass-ceramic that can obtain a large deep stress and an ultra-high compressive stress layer depth through chemical strengthening, and use this spinel glass-ceramic to prepare a strengthened glass-ceramic with high mechanical strength. Summary of the Invention The object of the present application is to provide a spinel glass-ceramic and its application. The spinel glass-ceramic can be chemically strengthened to obtain a strengthened spinel glass-ceramic with a large deep layer stress and an ultra-high depth of the compressive stress layer, thereby improving the mechanical strength performance and anti-damage performance of the strengthened spinel glass-ceramic, especially improving its anti-drop impact performance and anti-extrusion performance. The technical solution provided by the present application is as follows: In a first aspect, a spinel glass-ceramic is provided. In terms of mole percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 3.00 mol% to 7.50 mol%, ZnO 7.00 mol% to 13.00 mol%, Na2O 1.00 mol% to 10.00 mol%, Li2O 2.50 mol% to 10.00 mol%; The spinel glass-ceramic contains (Zn, Mg)Al2O4 crystal phase accounting for 15.00 wt% to 45.00 wt% of the spinel glass-ceramic; Let W [(Zn，Mg)Al2O4] be the weight percentage of the (Zn, Mg)Al2O4 crystal phase in the spinel glass-ceramic, W [Al2O3] be the weight percentage of Al2O3 in the spinel glass-ceramic, W [MgO] be the weight percentage of MgO in the spinel glass-ceramic, W [ZnO] be the weight percentage of ZnO in the spinel glass-ceramic; A = (1 - W [(Zn，Mg)Al2O4] / 2) × W [Al2O3] / 2, B = (1 - W [(Zn，Mg)Al2O4] ) × (W [MgO] + W [ZnO] ), C = A / B, and in the spinel glass-ceramic, 1.50 ≤ C ≤ 1.85. The spinel glass-ceramic of the present application has a specific composition and crystal phase structure. By utilizing the synergistic effect of this composition and crystal phase structure, not only high intrinsic strength is imparted to the spinel glass-ceramic, but also it can ensure that the spinel glass-ceramic obtains the desired stress structure after chemical strengthening treatment, especially an ultra-high depth of the compressive stress layer and a large deep layer stress. A strengthened spinel glass-ceramic with high mechanical strength and high anti-damage performance can be prepared by using this spinel glass-ceramic. In some embodiments of the present application, in the spinel glass-ceramic, the value of A ranges from 10.00% to 25.00%, preferably from 14.00% to 25.00%; and / or the value of B ranges from 7.50% to 12.50%, preferably from 8.00% to 12.00%. By making the values of A and B satisfy the above ranges, it helps to make the composition and structure of the spinel glass-ceramic satisfy the value range of C. In some embodiments of the present application, the spinel glass-ceramic further contains a tetragonal ZrO2 crystal phase, and the total content of the (Zn, Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase accounts for 25.00% to 70.00% by weight of the spinel glass-ceramic, preferably 30.00% to 50.00% by weight of the spinel glass-ceramic. When the total crystal phase content W of the (Zn, Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase in the spinel glass-ceramic is within the above range, it can ensure that there are a large number of crystals in the spinel glass-ceramic that can hinder crack propagation, which is beneficial to improving the intrinsic strength (or also called the inherent strength) of the spinel glass-ceramic. In some embodiments of the present application, in the spinel glass-ceramic, the ratio of the (Zn, Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase is 1.00 to 18.00, preferably 1.00 to 15.00. When the ratio of the (Zn, Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase (i.e., the mass ratio Z of the (Zn, Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase) in the spinel glass-ceramic is within the above range, it can endow the spinel glass-ceramic with a specific crystal phase structure, which is not only beneficial to improving the intrinsic strength of the spinel glass-ceramic, but also beneficial to obtaining a desired stress structure when the spinel glass-ceramic is chemically strengthened. In some embodiments of the present application, in the spinel glass-ceramic, the average crystal size of the (Zn, Mg)Al2O4 crystal phase is 3.0 nm to 10.0 nm, preferably 4.0 nm to 8.0 nm, more preferably 4.0 nm to 7.5 nm, and further preferably 4.5 nm to 7.5 nm. When the average crystal size of the (Zn, Mg)Al2O4 crystal phase in the spinel glass-ceramic is within the above range, it not only helps to improve the light transmittance of the spinel glass-ceramic while ensuring its strength, but also helps to improve the ion exchange performance of the spinel glass-ceramic, enabling it to obtain a desired stress level through chemical strengthening. In some embodiments of the present application, in terms of the molar percentage of oxides, the composition of the spinel glass-ceramic further includes: K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%. In the present application, K2O, CaO, B2O3 or BaO are optional components, and appropriate use can have a certain improvement effect on the forming effect, crystallization effect, chemical strengthening effect or optical effect of the spinel glass-ceramic. In some embodiments of the present application, in terms of the molar percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 4.00 mol% to 7.00 mol%, ZnO 9.00 mol% to 12.00 mol%, Na2O 2.00 mol% to 10.00 mol%, Li2O 3.00 mol% to 10.00 mol%. By appropriately adjusting the content of MgO, ZnO, Li2O or Na2O, it helps to ensure that the content of the main crystal phase in the spinel glass-ceramic meets the desired level, and at the same time helps to ensure that the spinel glass-ceramic achieves the desired chemical strengthening effect, thereby obtaining a strengthened spinel glass-ceramic with a high stress level. In some embodiments of the present application, in terms of the molar percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 50.00 mol%, Al2O3 25.00 mol% to 35.00 mol%, ZrO2 3.00 mol% to 5.00 mol%, MgO 4.00 mol% to 7.00 mol%, ZnO 9.00 mol% to 12.00 mol%, Na2O 2.00 mol% to 10.00 mol%, Li2O 3.00 mol% to 10.00 mol%. By appropriately adjusting the content of each necessary oxide, it helps to ensure that the spinel glass-ceramic obtains a desired crystal phase structure and glass network structure that can achieve a high stress level, and thus is conducive to obtaining a strengthened spinel glass-ceramic with a high stress level. In some embodiments of the present application, in terms of the molar percentage of each oxide in the composition of the spinel glass-ceramic, the composition of the spinel glass-ceramic satisfies: 1.30 ≤ ZnO / MgO ≤ 2.50; and / or, 0.05 ≤ Li2O / (Al2O3 - (MgO + ZnO) + SiO2) ≤ 0.20; and / or, 0.19 ≤ (Al2O3 - (MgO + ZnO)) / SiO2 ≤ 0.60; and / or, 0.26 ≤ Na2O / Li2O ≤ 3.00. By making the spinel glass ceramic of the present application satisfy at least one of the above relationships ZnO / MgO, Li2O / (Al2O3 - (MgO + ZnO) + SiO2), (Al2O3 - (MgO + ZnO)) / SiO2, Na2O / Li2O, it helps to further adjust the network structure and crystal phase structure of the spinel glass ceramic, so that the spinel glass ceramic forms a specific microstructure that helps to obtain the desired stress level. In some embodiments of the present application, based on the molar percentages of the respective oxides in the spinel glass ceramic composition, the composition of the spinel glass ceramic also satisfies: 12.00 mol% ≤ ZnO + MgO ≤ 20.00 mol%, preferably, 13.00 mol% ≤ ZnO + MgO ≤ 17.30 mol%; and / or, 9.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 22.00 mol%, preferably, 10.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 20.00 mol%; and / or, 5.00 mol% ≤ Na2O + Li2O ≤ 15.00 mol%, preferably, 6.00 mol% ≤ Na2O + Li2O ≤ 13.50 mol%. The spinel glass ceramic of the present application satisfies at least one of the above relationships ZnO + MgO, Al2O3 - (MgO + ZnO), Na2O + Li2O, which helps to obtain a high content of (Zn, Mg)Al2O4 crystal phase with high hardness and high modulus to further improve the intrinsic strength of the spinel glass ceramic, or helps to further improve the ion exchange effect of the spinel glass ceramic to obtain the desired stress level. In some embodiments of the present application, the spinel glass ceramic is transparent in the visible light range. In some embodiments of the present application, the transmittance of the 0.7 mm thick spinel glass ceramic at a wavelength of 550 nm is greater than or equal to 85%. The transmittance of the 0.7 mm thick spinel glass ceramic at a wavelength of 550 nm within the above range indicates that the spinel glass ceramic of the present application has high light transmittance. At the same time, the spinel glass ceramic of the present application can also be chemically strengthened to obtain high mechanical strength and high anti-damage performance, effectively broadening the application scenarios and application fields of the spinel glass ceramic of the present application. By making the spinel glass-ceramics meet specific crystal phase structures, on the one hand, it is beneficial for the spinel glass-ceramics to obtain high intrinsic strength, and on the other hand, it is beneficial to improve the chemical strengthening effect of the spinel glass-ceramics, enabling them to obtain an ultra-high compressive stress layer depth and a large deep-layer stress through chemical strengthening, and further facilitating the improvement of the mechanical strength and anti-damage performance of the spinel glass-ceramics. The relevant characteristics of the X-ray diffraction pattern can reflect the crystal phase structure of the glass-ceramics, including crystal phase composition, crystal size, etc. In some embodiments of the present application, in the X-ray diffraction pattern of the spinel glass-ceramics, among the characteristic peaks with 2θ angles in the range of 28° to 32°, the peak with the maximum peak intensity is the first characteristic peak, and among the characteristic peaks with 2θ angles in the range of 36° to 38°, the peak with the maximum peak intensity is the second characteristic peak. The peak intensity ratio X of the first characteristic peak and the second characteristic peak is 0.80 to 1.50, preferably the peak intensity ratio X is 0.85 to 1.30. When the peak intensity ratio X of the spinel glass-ceramics is within the above range, it indicates that a suitable crystal integrity is obtained in the spinel glass-ceramics, which further helps to ensure better optical and strengthening effects of the spinel glass-ceramics. In some embodiments of the present application, in the X-ray diffraction pattern of the spinel glass-ceramics, the

[0400] crystal plane characteristic peak of the (Zn,Mg)Al2O4 crystal phase is located at 2θ angles in the range of 44° to 46°, the

[0311] crystal plane characteristic peak of the (Zn,Mg)Al2O4 crystal phase is located at 2θ angles in the range of 34° to 38°, and the

[0440] crystal plane characteristic peak of the (Zn,Mg)Al2O4 crystal phase is located at 2θ angles in the range of 64° to 67°; The full width at half maximum W of the

[0400] crystal plane characteristic peak

[0400] is 0.650° to 1.800°, preferably W

[0400] is 0.900° to 1.600°; The full width at half maximum W of the

[0311] crystal plane characteristic peak

[0311] is 0.900° to 2.800°, preferably W

[0311] is 1.100° to 2.230°; The full width at half maximum W of the

[0440] crystal plane characteristic peak

[0440] is 0.750° to 2.000°, preferably W

[0440] is 0.900° to 1.600°. The W of the spinel glass-ceramics

[0400] 、W

[0311] 、W

[0440] Within the above range, it is illustrated that in the crystal phase structure of the spinel glass-ceramic, the (Zn, Mg)Al2O4 crystal phase has a suitable average crystal size, meeting a specific crystal phase structure, which is not only conducive to endowing the spinel glass-ceramic with high intrinsic strength, but also conducive to ensuring that the spinel glass-ceramic obtains an ideal stress structure through chemical strengthening. Meanwhile, it helps the spinel glass-ceramic to obtain the desired optical properties. In a second aspect, there is provided a glass device made of the spinel glass-ceramic in any of the foregoing embodiments. In a third aspect, there is provided an electronic device including the spinel glass-ceramic in any of the foregoing embodiments. In some embodiments of the present application, the electronic device includes at least one of a mobile phone, a tablet computer, smart wearables, a display, and a television. One or more technical solutions of the present application have the following advantages or beneficial effects: The present application provides a spinel glass-ceramic having a specific composition and crystal phase structure. By utilizing the synergistic effect of this composition and crystal phase structure, it not only endows the spinel glass-ceramic with high intrinsic strength, but also can ensure that the spinel glass-ceramic obtains the desired stress structure after chemical strengthening treatment, especially an ultra-high compressive stress layer depth and a large deep-layer stress. An enhanced spinel glass-ceramic with high mechanical strength and high anti-damage performance can be prepared using this spinel glass-ceramic. Of course, it is not necessary for any product or method implementing the present application to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. FIG. 1 is a schematic structural diagram of a strengthened glass-ceramic in the prior art, where t is the thickness of the glass, d is the depth of the compressive stress layer, 11 is the compressive stress layer, and 12 is the tensile stress layer; FIG. 2 is a comparative diagram of XRD diffraction patterns of the spinel glass-ceramics in Examples 1 to 3 and Comparative Examples 6 to 9; FIG. 3 is a schematic diagram of the XRD diffraction curve fitting of the spinel glass-ceramic in Example 6; FIG. 4 is the XRD diffraction pattern of the spinel glass-ceramic in Comparative Example 8; FIG. 5 is the XRD diffraction pattern of the spinel glass-ceramic in Example 1; FIG. 6 is the XRD diffraction pattern of the spinel glass-ceramic in Comparative Example 10; FIG. 7 is the XRD diffraction pattern of the spinel glass-ceramic in Comparative Example 11; FIG. 8 is the transmittance curve of the spinel glass-ceramic in Example 1 under different wavelength conditions; Figure 9 is a comparison chart of XRD diffraction before and after chemical strengthening of the spinel glass-ceramic in Example 1; Figure 10 is a comparison chart of transmittance curves under different wavelength conditions before and after chemical strengthening of the spinel glass-ceramic in Example 1; Figure 11 is an XRD diffraction pattern of the spinel glass-ceramic in Example 2; Figure 12 is a schematic diagram of the process of single-rod static pressure strength test in this application; Figure 13 is a schematic structural diagram of the fixture for single-rod static pressure strength test in this application; Figure 14 is a schematic cross-sectional structural diagram of the fixture for single-rod static pressure strength test in this application. Detailed implementation manners To make the objectives, technical solutions, and advantages of this application clearer, the following provides examples with reference to the accompanying drawings to further elaborate on this application in detail. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of them. All other embodiments obtained by those skilled in the art based on this application belong to the scope protected by this application. Term explanations DOL_0: Depth of the compressive stress layer, also known as the depth of the compressive stress layer, refers to the distance along the thickness direction from any surface of the strengthened glass-ceramic (for example, in this application, the strengthened spinel glass-ceramic obtained by chemical strengthening of the spinel glass-ceramic) to the position where the compressive stress near the surface is zero. ∣CT_AV∣: Refers to the absolute value of the average tensile stress in the tensile stress layer, specifically, the absolute value of the average of all tensile stresses in the tensile stress layer. CS_50: Refers to the compressive stress value at a depth of 50 μm measured from the surface of the strengthened glass-ceramic along the thickness direction. ∣CT_CV∣: Refers to the absolute value of the maximum tensile stress in the tensile stress layer, specifically, the absolute value of the maximum of all tensile stresses in the tensile stress layer. Crystal phase content: Refers to the percentage of the mass of the crystal phase in the glass-ceramic accounting for the total mass of the glass-ceramic. Peak intensity: Refers to the height of the diffraction peak in the XRD pattern. Full width at half maximum: Refers to the width of the half-height of the diffraction peak in the XRD pattern, usually expressed in degrees or 2θ values. Base glass: Refers to the glass that has not been nucleated, crystallized, or strengthened, or is also called the basic glass. Glass-ceramic: Also known as glass-ceramics or crystallized glass, it is a type of solid composite material that contains both a glass phase and a microcrystalline phase (or also called a crystal phase, crystallization phase, or crystal phase). Theoretically speaking, when the depths of the compressive stress layers extending inward from the two main surfaces of a glass product are equal or approximately equal, and the sum of the depths of the two compressive stress layers is equal to the thickness of the tensile stress layer, that is, as shown in FIG. 1, the depths d of the compressive stress layers 11 on both sides are respectively approximately equal to 25% of the thickness t of the glass 10, and the thickness of the tensile stress layer 12 is approximately equal to 50% of the thickness t of the glass 10, the glass will reach the ideal state of the depth of the compressive stress layer. However, in reality, in the prior art, almost no glass product has achieved the target effect that the depth d of the compressive stress layer is approximately equal to 25% of the glass thickness t. On the one hand, this depth of the compressive stress layer is relatively difficult to achieve. On the other hand, in existing glass products, a relatively high depth of the compressive stress layer is often accompanied by a decrease in the surface stress level and a decrease in the overall strength of the glass product. Because in the ion exchange process of chemical strengthening treatment, the diffusion of ions becomes more and more difficult towards the inside, and simply increasing the amount of alkali metal ions to increase the diffusion amount is very likely to cause problems such as bursting and fragmentation of the glass due to excessive internal stress before reaching a relatively high depth. In addition, for many glass products, after the ion exchange diffusion reaches a certain depth and the stress reaches a certain level, stress relaxation will occur, the depth will increase slightly or not increase, but the stress will decrease significantly, resulting in a decrease in the strength of the glass product. Therefore, currently, only the depth of the compressive stress of the glass product can be made as close as possible to this ideal effect. For spinel glass ceramics containing the main crystal phase of (Zn, Mg)Al2O4 crystal phase (in this application, (Zn, Mg)Al2O4 is used to represent the solid solution of zinc spinel and magnesium spinel, or also known as zinc aluminate-spinel solid solution, zinc magnesium spinel solid solution, zinc spinel-magnesium spinel solid solution, zinc magnesium aluminate spinel solid solution), simply increasing and introducing the quantity and types of metal ions that can undergo ion exchange cannot ensure the achievement of an ultra-high stress layer depth and deep stress. On the one hand, when the content of Li + and Na + in the spinel glass ceramics exceeds a certain amount, it is likely to affect the network structure and crystal phase structure of the spinel glass ceramics, resulting in the problem that the required spinel glass ceramics cannot be obtained; on the other hand, the stress distribution and stress effect that can be obtained after the chemical strengthening of the glass ceramics are jointly affected by the composition and crystal phase structure of the glass ceramics. Simply increasing the quantity and types of alkali metal ions that can undergo ion exchange cannot guarantee that the spinel glass ceramics obtain a crystal phase structure that can achieve the desired stress distribution. Without being limited by theory, the composition and crystal phase structure of the spinel glass-ceramic have a very close relationship with the stress distribution or stress structure after its chemical strengthening. By making the spinel glass-ceramic meet specific composition and crystal phase structure, after chemical strengthening, a strengthened spinel glass-ceramic with an ultra-high depth of compressive stress layer and a large deep-layer stress can be obtained, realizing high mechanical strength and high anti-damage performance of the spinel glass-ceramic. In view of this, there is provided a spinel glass-ceramic having a specific composition and crystal phase structure and capable of obtaining a desired stress structure through chemical strengthening, and its application. In some embodiments of the present application, there is provided a spinel glass-ceramic. In terms of molar percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 3.00 mol% to 7.50 mol%, ZnO 7.00 mol% to 13.00 mol%, Na2O 1.00 mol% to 10.00 mol%, Li2O 2.50 mol% to 10.00 mol%; The spinel glass-ceramic contains 15.00 wt% to 45.00 wt% of (Zn, Mg)Al2O4 crystal phase based on the weight of the spinel glass-ceramic; Let W [(Zn，Mg)Al2O4] be the weight percentage of the (Zn, Mg)Al2O4 crystal phase in the spinel glass-ceramic, W [Al2O3] be the weight percentage of Al2O3 in the spinel glass-ceramic, W [MgO] be the weight percentage of MgO in the spinel glass-ceramic, W [ZnO] be the weight percentage of ZnO in the spinel glass-ceramic; A = (1 - W [(Zn，Mg)Al2O4] / 2) × W [Al2O3] / 2, B = (1 - W [(Zn，Mg)Al2O4] ) × (W [MgO] + W [ZnO] ), C = A / B, and in the spinel glass-ceramic, 1.50 ≤ C ≤ 1.85. It should be understood that the spinel glass-ceramics of the present application are obtained by heat-treating a base glass. Therefore, based on the molar percentage of oxides, the composition of the spinel glass-ceramics is the same as or substantially the same as that of the base glass. That is, in the present application, the composition of the base glass for preparing the spinel glass-ceramics, based on the molar percentage of oxides, includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 3.00 mol% to 7.50 mol%, ZnO 7.00 mol% to 13.00 mol%, Na2O 1.00 mol% to 10.00 mol%, and Li2O 2.50 mol% to 10.00 mol%. In the present application, after heat-treating a base glass that meets the above ranges to obtain spinel glass-ceramics with a specific crystal phase structure and a specific glass network structure, the spinel glass-ceramics can be chemically strengthened to obtain strengthened spinel glass-ceramics with an ultra-high depth of the compressive stress layer and a large deep-layer stress. In the present application, SiO2 is a glass network-forming oxide and an essential component for constructing the glass network structure. An appropriate amount of SiO2 can increase the stability and mechanical strength of the glass, but an excessive amount of SiO2 will increase the viscosity of the base glass, making it more difficult to melt the glass, thereby reducing the formability of the base glass. Therefore, in the present application, based on mol% of oxides, the content of SiO2 in the composition of the base glass or the spinel glass-ceramics is 35.00 mol% to 60.00 mol%. In some embodiments of the present application, the content of SiO2 can be 35.00 mol%, 37.00 mol%, 40.00 mol%, 42.00 mol%, 45.00 mol%, 47.00 mol%, 50.00 mol%, 52.00 mol%, 55.00 mol%, 57.00 mol% or 60.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as spinel glass-ceramics with the desired properties of the present application can be obtained. In some embodiments, the content of SiO2 can be 36.00 mol% to 58.00 mol%, 38.00 mol% to 56.00 mol%, 40.00 mol% to 52.00 mol%, 42.00 mol% to 50.00 mol% or 44.00 mol% to 48.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as spinel glass-ceramics with the desired properties of the present application can be obtained. In the present application, an appropriate amount of Al2O3 can promote the precipitation of the main crystal phase, inhibit the precipitation of other impurity phases such as quartz, and at the same time is beneficial to increasing the ion exchange rate during the chemical strengthening process. However, too much Al2O3 will lead to a sharp increase in the melting difficulty of the substrate glass, and at the same time, it is easy to cause the problem of devitrification due to too fast crystallization rate during the normal cooling process of the substrate glass. Therefore, in the present application, based on mol% of oxides, in the composition of the substrate glass or the spinel glass-ceramic, the content of Al2O3 is 20.00 mol% to 40.00 mol%. In some embodiments of the present application, the content of Al2O3 can be 20.00 mol%, 21.00 mol%, 22.00 mol%, 23.00 mol%, 24.00 mol%, 25.00 mol%, 26.00 mol%, 27.00 mol%, 28.00 mol%, 29.00 mol%, 30.00 mol%, 31.00 mol%, 32.00 mol%, 33.00 mol%, 34.00 mol%, 35.00 mol%, 36.00 mol%, 37.00 mol%, 38.00 mol%, 39.00 mol% or 40.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the required properties of the present application can be obtained. In some embodiments, the content of Al2O3 can be 22.00 mol% to 38.00 mol%, 24.00 mol% to 36.00 mol%, 26.00 mol% to 34.00 mol% or 28.00 mol% to 32.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required properties of the present application can be obtained. In the present application, ZrO2 is an effective nucleating agent. During the heat treatment process of the substrate glass, ZrO2 first precipitates in the substrate glass in the form of crystals, and the ZrO2 crystals become crystal nuclei for the growth of subsequent main crystal phase crystals. Within a certain glass composition range, the content of ZrO2 will affect the formation of the substrate glass, the crystal shape, crystal type and crystal size of the glass-ceramic obtained by heat-treating the substrate glass, etc. By adjusting the composition of the substrate glass to meet the requirements of an appropriate amount of ZrO2, ZrO2 can precipitate preferentially, and then the main crystal phase spinel crystals grow. Too low a content of ZrO2 will affect the precipitation of the spinel crystal phase; while too high a content of ZrO2 will cause an increase in the melting difficulty of the substrate glass and is likely to cause white unmelted substances to appear in the substrate glass. Therefore, in the present application, based on mol% of oxides, in the composition of the substrate glass or the spinel glass-ceramic, the content of ZrO2 is 2.00 mol% to 8.00 mol%. In some embodiments of the present application, the content of ZrO2 can be 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol% or 8.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments, the content of ZrO2 can be 2.50 mol% - 7.50 mol%, 3.50 mol% - 7.00 mol%, 4.50 mol% - 6.50 mol% or 5.00 mol% - 6.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In the present application, MgO and ZnO are essential components of the main crystal phase spinel, which can promote the precipitation of spinel and also reduce the melting difficulty to a certain extent. However, excessive MgO and ZnO easily lead to excessive growth of spinel grains, and it is difficult to obtain spinel glass-ceramics with high transparency. Therefore, in the present application, in terms of mol% of oxides, in the composition of the base glass or spinel glass-ceramics, the content of MgO is 3.00 mol% - 7.50 mol%, and the content of ZnO is 7.00 mol% - 13.00 mol%. In some embodiments of the present application, the content of MgO can be 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol% or 7.50 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments, the content of MgO can be 3.50 mol% - 7.50 mol%, 4.50 mol% - 7.00 mol% or 5.00 mol% - 6.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments of the present application, the content of ZnO can be 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol%, 10.00 mol%, 10.50 mol%, 11.00 mol%, 11.50 mol%, 12.00 mol%, 12.50 mol% or 13.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. In some embodiments, the content of ZnO can be 7.50 mol% to 12.50 mol%, 8.50 mol% to 12.00 mol%, 9.50 mol% to 11.50 mol% or 10.00 mol% to 11.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. In the present application, an increase in the content of Na2O helps to obtain a higher surface compressive stress, and at the same time helps to reduce the melting temperature of the substrate glass and the crystallization temperature during the preparation of spinel glass-ceramics from the substrate glass. However, excessive Na2O easily causes the substrate glass to become ceramized during the annealing process, or easily causes the precipitation of undesired secondary phases during the heat treatment for preparing spinel glass-ceramics from the substrate glass, thereby affecting the optical properties of the spinel glass-ceramics; while too low Na2O easily causes an increase in the heat treatment temperature during the preparation of spinel glass-ceramics from the substrate glass, or easily causes direct phase separation or precipitation of undesired secondary phases during the preparation of spinel glass-ceramics from the substrate glass, thereby obtaining opaque glass-ceramics. Therefore, in the present application, in terms of mol% of oxides, the content of Na2O in the composition of the substrate glass or spinel glass-ceramics is 1.00 mol% to 10.00 mol%. In some embodiments of the present application, the content of Na2O can be 1.00 mol%, 1.50 mol%, 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol% or 10.00 mol%, or a value within the numerical range formed by any two of the above values, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. In some embodiments, the content of Na2O can be 1.50 mol% - 9.50 mol%, 2.50 mol% - 9.00 mol%, 3.50 mol% - 8.50 mol%, 4.50 mol% - 7.50 mol% or 5.00 mol% - 7.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. In the present application, the increase in the content of Li2O helps to obtain a higher deep compressive stress, improve the Young's modulus of the glass ceramic, and at the same time helps to reduce the melting temperature of the substrate glass and the crystallization temperature of the substrate glass when preparing the spinel glass ceramic. However, excessive Li2O easily causes the substrate glass to become ceramicized during the annealing process, or easily causes the precipitation of undesired impurity phases during the heat treatment process of preparing the spinel glass ceramic from the substrate glass, or easily causes excessive crystal growth during the heat treatment process, thus affecting the optical properties of the spinel glass ceramic; while too low Li2O easily causes the heat treatment temperature to increase when preparing the spinel glass ceramic from the substrate glass, or easily causes the deep stress obtained during the chemical strengthening of the spinel glass ceramic to become smaller. Therefore, in the present application, based on mol% of the oxide, in the composition of the substrate glass or the spinel glass ceramic, the content of Li2O is 2.50 mol% - 10.00 mol%. In some embodiments of the present application, the content of Li2O can be 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol% or 10.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass ceramic with the required performance of the present application can be obtained. In some embodiments, the content of Li2O can be 3.00 mol% to 9.50 mol%, 3.50 mol% to 9.00 mol%, 4.00 mol% to 8.50 mol%, 4.50 mol% to 7.50 mol% or 5.00 mol% to 7.00 mol%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the required performance of the present application can be obtained. In the present application, in the spinel glass ceramic, the (Zn,Mg)Al2O4 crystal phase accounts for 15.00 wt% to 45.00 wt% of the spinel glass ceramic. When the content of the (Zn,Mg)Al2O4 crystal phase in the spinel glass ceramic is within the above range, it indicates that there are a large number of crystals with high hardness and high modulus in the spinel glass ceramic, which can endow the spinel glass ceramic with high intrinsic strength (or also called inherent strength). At the same time, by controlling the content of the (Zn,Mg)Al2O4 crystal phase, the spinel glass ceramic can meet a specific crystal phase structure, which is beneficial to ensuring that the spinel glass ceramic obtains an ideal stress structure after chemical strengthening. In some embodiments of the present application, in the spinel glass ceramic, the crystal phase content W of the (Zn,Mg)Al2O4 crystal phase [(Zn， Mg)Al2O4] can be 15.00 wt%, 18.00 wt%, 20.00 wt%, 23.00 wt%, 25.00 wt%, 28.00 wt%, 30.00 wt%, 33.00 wt%, 35.00 wt%, 38.00 wt%, 40.00 wt%, 43.00 wt% or 45.00 wt%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass ceramic with the required performance of the present application can be obtained. In some embodiments, in the spinel glass ceramic, the crystal phase content W of the (Zn,Mg)Al2O4 crystal phase [(Zn，Mg)Al2O4]It may be 16.00 wt% to 45.00 wt%, 18.00 wt% to 43.00 wt%, 20.00 wt% to 42.00 wt%, 22.00 wt% to 40.00 wt% or 25.00 wt% to 35.00 wt%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range as long as a spinel glass-ceramic with the desired performance of the present application can be obtained. In some embodiments of the present application, let W [(Zn，Mg)Al2O4] be the weight percentage of the (Zn, Mg)Al₂O₄ crystal phase in the spinel glass-ceramic, W [Al2O3] be the weight percentage of Al₂O₃ in the spinel glass-ceramic, W [MgO] be the weight percentage of MgO in the spinel glass-ceramic, W [ZnO] be the weight percentage of ZnO in the spinel glass-ceramic; A = (1 - W [(Zn，Mg)Al2O4] / 2) × W [Al2O3] / 2, B = (1 - W [(Zn，Mg)Al2O4] ) × (W [MgO] + W [ZnO] ), C = A / B, in the spinel glass-ceramic, 1.50 ≤ C ≤ 1.85. In the present application, by optimizing the composition and structure, the crystal phase content of the (Zn, Mg)Al₂O₄ crystal phase and the contents of Al₂O₃, MgO, and ZnO in the spinel glass-ceramic are made to satisfy the above range of characteristic C, which can ensure that after chemical strengthening of the spinel glass-ceramic, the desired stress structure is obtained, and further, the prepared strengthened spinel glass-ceramic has high mechanical strength and excellent anti-damage performance. In some embodiments, in the above spinel glass-ceramic, calculated according to formula C, the value of C can be 1.52 to 1.82, 1.56 to 1.75, 1.60 to 1.70 or 1.62 to 1.68. In some embodiments, in the above spinel glass-ceramic, calculated according to formula C, the value of C can be 1.51, 1.53, 1.55, 1.58, 1.60, 1.62, 1.65, 1.68, 1.70, 1.72, 1.75, 1.78, 1.80, 1.82 or 1.85, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as a spinel glass-ceramic with the desired performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range as long as a spinel glass-ceramic with the desired performance of the present application can be obtained. In some embodiments of the present application, W [Al2O3] is 35.00 wt% to 50.00 wt%. In some embodiments of the present application, W [MgO] is 2.50 wt% to 4.00 wt%. In some embodiments of the present application, W [ZnO] is 9.50 wt% to 14.50 wt%. Overall, by making the composition and structure of the spinel glass-ceramic satisfy the above characteristics, so that in the spinel glass-ceramic, the crystal phase content of the (Zn, Mg)Al₂O₄ crystal phase satisfies the above range, it is possible to make the spinel glass-ceramic have a specific crystal phase structure and a specific glass network structure, thereby improving the chemical strengthening effect of the spinel glass-ceramic, enabling the spinel glass-ceramic to obtain a desired stress structure through chemical strengthening treatment, such as obtaining an ultra-high compressive stress layer depth and a large deep-layer stress, obtaining a high stress level, and further enabling the prepared strengthened spinel glass-ceramic to obtain high mechanical strength and high anti-damage performance. In some embodiments of the present application, in the spinel glass-ceramic, the value of A is 10.00% to 25.00%, preferably 14.00% to 25.00%; and / or, the value of B is 7.50% to 12.50%, preferably 8.00% to 12.00%. By making the values of A and B satisfy the above range, it helps to make the composition and structure of the spinel glass-ceramic satisfy the value range of C, and helps to make the spinel glass-ceramic satisfy a specific structure that is beneficial to obtaining a desired stress level. In some embodiments of the present application, the value of A can be 10.00%, 11.00%, 12.00%, 13.00%, 14.00%, 15.00%, 16.00%, 17.00%, 18.00%, 19.00%, 20.00%, 21.00%, 22.00%, 23.00%, 24.00% or 25.00%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. It should be understood that in a specific embodiment, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. In some embodiments of the present application, the value of B can be 7.50%, 8.00%, 8.50%, 9.00%, 9.50%, 10.00%, 10.50%, 11.00%, 11.50%, 12.00% or 12.50%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. It should be understood that in a specific embodiment, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. In some embodiments of the present application, the spinel glass-ceramic further contains a tetragonal ZrO2 crystal phase, and the total content of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase accounts for 25.00 wt% to 70.00 wt% of the spinel glass-ceramic, preferably 30.00 wt% to 50.00 wt% of the spinel glass-ceramic. When the total crystal phase content W of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase in the spinel glass-ceramic is within the above range, a large number of crystals capable of hindering crack propagation can be ensured inside the spinel glass-ceramic, which is beneficial to improving the intrinsic strength of the spinel glass-ceramic. In some embodiments of the present application, the total crystal phase content W of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase can be 25.00 wt%, 28.00 wt%, 30.00 wt%, 33.00 wt%, 35.00 wt%, 38.00 wt%, 40.00 wt%, 43.00 wt%, 45.00 wt%, 48.00 wt%, 50.00 wt%, 53.00 wt%, 55.00 wt%, 58.00 wt%, 60.00 wt%, 63.00 wt%, 65.00 wt%, 68.00 wt% or 70.00 wt%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the desired properties of the present application can be obtained. In some embodiments, the total crystal phase content W of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase can be 26.00 wt% to 68.00 wt%, 28.00 wt% to 66.00 wt%, 30.00 wt% to 65.00 wt%, 32.00 wt% to 60.00 wt%, 35.00 wt% to 55.00 wt%, 38.00 wt% to 50.00 wt% or 40.00 wt% to 48.00 wt%. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the desired properties of the present application can be obtained. In some embodiments of the present application, in the spinel glass-ceramic, the ratio of the (Zn,Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase is 1.00 to 18.00, preferably 1.00 to 15.00. When the ratio of the (Zn,Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase (i.e., the mass ratio Z of the (Zn,Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase) in the spinel glass-ceramic is within the above range, a specific crystal phase structure can be imparted to the spinel glass-ceramic. This crystal phase structure is not only beneficial to improving the intrinsic strength of the spinel glass-ceramic, but also beneficial to obtaining the desired stress structure after chemical strengthening of the spinel glass-ceramic. In some embodiments of the present application, the ratio (mass ratio Z) of the (Zn, Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase can be 1.00, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00, 11.00, 12.00, 13.00, 14.00, 15.00, 16.00, 17.00, or 18.00, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. In some embodiments of the present application, based on the mass of the spinel glass ceramic, the crystal phase content W of the tetragonal ZrO2 crystal phase [ZrO2] is 2.00 wt% to 16.00 wt%. The tetragonal ZrO2 crystal phase and the (Zn, Mg)Al2O4 crystal phase jointly determine the crystal phase structure inside the spinel glass ceramic. By meeting a specific content range, it is beneficial to ensure the structural strength of the spinel glass ceramic and beneficial to ensure that the spinel glass ceramic obtains an ideal stress structure after chemical strengthening. In some embodiments of the present application, the crystal phase content W of the tetragonal ZrO2 crystal phase in the spinel glass ceramic [ZrO2] can be 2.00 wt%, 3.00 wt%, 4.00 wt%, 5.00 wt%, 6.00 wt%, 7.00 wt%, 8.00 wt%, 9.00 wt%, 10.00 wt%, 11.00 wt%, 12.00 wt%, 13.00 wt%, 14.00 wt%, 15.00 wt%, or 16.00 wt%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the desired properties of the present application can be obtained. In some embodiments of the present application, in the spinel glass ceramic, the average crystal size of the (Zn, Mg)Al2O4 crystal phase is 3.0 nm to 10.0 nm, preferably 4.0 nm to 8.0 nm, more preferably 4.0 nm to 7.5 nm, and further preferably 4.5 nm to 7.5 nm. When the average crystal size of the (Zn, Mg)Al2O4 crystal phase in the spinel glass ceramic is within the above range, it not only helps to improve the light transmittance of the spinel glass ceramic while ensuring its strength, but also helps to improve the ion exchange performance of the spinel glass ceramic, enabling it to obtain the desired stress level through chemical strengthening. In some embodiments of the present application, the average crystal size of the (Zn, Mg)Al2O4 crystal phase can be 3.0 nm, 4.0 nm, 4.2 nm, 4.5 nm, 4.8 nm, 5.0 nm, 5.2 nm, 5.5 nm, 5.8 nm, 6.0 nm, 6.2 nm, 6.5 nm, 6.8 nm, 7.0 nm, 7.2 nm, 7.5 nm, 8.0 nm or 10.0 nm, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments, the average crystal size of the (Zn, Mg)Al2O4 crystal phase can be 4.0 nm to 9.0 nm, 4.5 nm to 8.0 nm, 4.5 nm to 7.5 nm or 4.5 nm to 7.0 nm. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments of the present application, in terms of mole percentage of oxides, the composition of the base glass for preparing spinel glass-ceramics or the spinel glass-ceramics includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 3.00 mol% to 7.50 mol%, ZnO 7.00 mol% to 13.00 mol%, Na2O 1.00 mol% to 10.00 mol%, Li2O 2.50 mol% to 10.00 mol%, K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%. In addition to the components necessary for preparing the spinel glass-ceramics of the present application, in the present application, K2O, CaO, B2O3 or BaO are optional components. Appropriate use can have a certain improvement effect on the forming effect, crystallization effect, chemical strengthening effect or optical effect of the spinel glass-ceramics. In the present application, K2O is an optional component that helps to improve the glass formability. Since K + has a larger radius than Na +, adding an appropriate amount of K2O can reduce the crystallization tendency of the base glass during the preparation process and increase the transparency and gloss of the spinel glass-ceramics. In the present application, based on mol% of oxides, the content of K2O in the base glass or spinel glass-ceramics is 0.00 mol% to 5.00 mol%. Adding K2O within this content range can achieve the aforementioned effects and is not likely to cause a decrease in the chemical stability and hardness of the spinel glass-ceramics, thus avoiding breakage of the spinel glass-ceramics. In some embodiments of the present application, the content of K2O can be 0.00 mol%, 0.50 mol%, 1.00 mol%, 1.50 mol%, 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol% or 5.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In the present application, B2O3 is an optional component that is beneficial to reducing the melting difficulty of the base glass. An appropriate amount of B2O3 is also beneficial to promoting the precipitation of spinel. However, too much B2O3 is likely to cause opacification or the precipitation of impurity phases that affect the transparency of the spinel glass-ceramics during the heat treatment of the base glass to prepare the spinel glass-ceramics. In the present application, based on mol% of oxides, the content of B2O3 can be 0.00 mol% to 10.00 mol%. In some embodiments of the present application, the content of B2O3 can be 0.00 mol%, 0.50 mol%, 1.00 mol%, 1.50 mol%, 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol% or 10.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In the present application, BaO is an optional component that is beneficial to improving the melting effect of the base glass. An appropriate amount of BaO can also inhibit the growth of grains to a certain extent, thereby having a certain improvement effect on the optical properties of the spinel glass-ceramics. However, if there is too much BaO, it is likely to affect the chemical strengthening effect of the spinel glass-ceramics and greatly reduce the stress level that can be obtained. In the present application, based on mol% of the oxide, the content of BaO is 0.00 mol% to 5.00 mol%. In some embodiments of the present application, the content of BaO can be 0.00 mol%, 0.50 mol%, 1.00 mol%, 1.50 mol%, 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol% or 5.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In the present application, CaO is an optional component that is beneficial to reducing the viscosity of the glass melt and enhancing the formability of the base glass. An appropriate amount of CaO is also beneficial to increasing the strain point and Young's modulus, and is beneficial to improving the ion exchange ability of the spinel glass-ceramics. At the same time, an appropriate amount of CaO can also increase the gloss and transparency of the base glass, reduce the crystallization tendency of the base glass, and slow down the hardening speed of the base glass. However, too much CaO is likely to cause an increase in the glass density, thereby affecting the ion exchange performance of the spinel glass-ceramics. In the present application, based on mol% of the oxide, the content of CaO is 0.00 mol% to 10.00 mol%. In some embodiments of the present application, the content of CaO can be 0.00 mol%, 0.50 mol%, 1.00 mol%, 1.50 mol%, 2.00 mol%, 2.50 mol%, 3.00 mol%, 3.50 mol%, 4.00 mol%, 4.50 mol%, 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol% or 10.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required properties of the present application can be obtained. In some embodiments of the present application, the composition of the base glass for preparing the spinel glass-ceramics or the spinel glass-ceramics, in terms of mole percentage of oxides, includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 4.00 mol% to 7.00 mol%, ZnO 9.00 mol% to 12.00 mol%, Na2O 2.00 mol% to 10.00 mol%, Li2O 3.00 mol% to 10.00 mol%, K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%. By appropriately adjusting the content of MgO, ZnO, Li2O or Na2O, it helps to ensure that the content of the main crystal phase in the spinel glass-ceramics meets the desired level, and at the same time, it also helps to ensure that the spinel glass-ceramics achieve the desired chemical strengthening effect, thereby obtaining a strengthened spinel glass-ceramics with a high stress level. In some embodiments of the present application, the composition of the base glass for preparing the spinel glass-ceramics or the spinel glass-ceramics, in terms of mole percentage of oxides, includes: SiO2 35.00 mol% to 50.00 mol%, Al2O3 25.00 mol% to 35.00 mol%, ZrO2 3.00 mol% to 5.00 mol%, MgO 4.00 mol% to 7.00 mol%, ZnO 9.00 mol% to 12.00 mol%, Na2O 2.00 mol% to 10.00 mol%, Li2O 3.00 mol% to 10.00 mol%, K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%. By appropriately adjusting the content of each necessary oxide, it helps to ensure that the spinel glass-ceramics obtain a desired crystal phase structure and glass network structure that can achieve a high stress level, thereby facilitating the obtaining of a strengthened spinel glass-ceramics with a high stress level. In some embodiments of the present application, in terms of mole percentage of each oxide in the composition, the composition of the base glass or the spinel glass-ceramics satisfies: 1.30 ≤ ZnO / MgO ≤ 2.50; by making ZnO and MgO satisfy a specific content relationship, it is beneficial to ensure the formation of a desired main crystal phase structure. In some embodiments of the present application, the value of ZnO / MgO can be 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40 or 2.50, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. In some embodiments of the present application, in terms of the molar percentage of each oxide in the composition, the composition of the base glass or spinel glass-ceramics satisfies: 0.05 ≤ Li2O / (Al2O3 - (MgO + ZnO) + SiO2) ≤ 0.20; by making Li2O, Al2O3, MgO, ZnO and SiO2 satisfy a specific content relationship, it helps to improve the ion exchange performance of the spinel glass-ceramics, helps the spinel glass-ceramics to obtain a high compressive stress layer depth and a large deep stress through chemical strengthening, and further helps to improve the mechanical strength and anti-damage performance of the spinel glass-ceramics, especially to improve its anti-drop impact performance. In some embodiments of the present application, the value of Li2O / (Al2O3 - (MgO + ZnO) + SiO2) can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19 or 0.20, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. In some embodiments of the present application, in terms of the molar percentage of each oxide in the composition, the composition of the base glass or spinel glass-ceramics satisfies: 0.19 ≤ (Al2O3 - (MgO + ZnO)) / SiO2 ≤ 0.60; by making Al2O3, MgO, ZnO and SiO2 satisfy a specific content relationship, it can ensure that there is an appropriate amount of Al in the residual glass phase of the spinel glass-ceramics. On the one hand, it helps to exert the synergistic effect of Si and Al, make the residual glass phase form a specific network structure, thereby improving the intrinsic strength of the spinel glass-ceramics. On the other hand, it helps to promote ion exchange and improve the chemical strengthening effect of the spinel glass-ceramics. In some embodiments of the present application, the value of (Al2O3-(MgO+ZnO)) / SiO2 can be 0.19, 0.20, 0.23, 0.25, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.43, 0.45, 0.48, 0.50, 0.53, 0.55, 0.58 or 0.60, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass-ceramics with the desired properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the desired properties of the present application can be obtained. In some embodiments of the present application, in terms of the molar percentage of each oxide in the composition, the composition of the base glass or spinel glass-ceramics satisfies: 0.26 ≤ Na2O / Li2O ≤ 3.00; by making Na and Li satisfy a specific content relationship, it helps to ensure that after chemical strengthening of the spinel glass-ceramics, the desired surface stress level and deep stress level can be obtained, so as to obtain the desired stress structure and achieve high mechanical strength and high anti-damage performance. In some embodiments of the present application, the value of Na2O / Li2O can be 0.26, 0.30, 0.50, 0.80, 1.00, 1.20, 1.50, 1.80, 2.00, 2.20, 2.30, 2.50, 2.80 or 3.00, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass-ceramics with the desired properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the desired properties of the present application can be obtained. In the present application, by making the composition of the spinel glass-ceramics of the present application satisfy at least one of the above relationships ZnO / MgO, Li2O / (Al2O3-(MgO+ZnO)+SiO2), (Al2O3-(MgO+ZnO)) / SiO2, Na2O / Li2O, it helps to further adjust the network structure and crystal phase structure of the spinel glass-ceramics, so that the spinel glass-ceramics form a specific microstructure that helps to obtain the desired stress level. In some embodiments of the present application, in terms of the molar percentage of each oxide in the composition, the composition of the base glass or spinel glass-ceramics further satisfies: 12.00 mol% ≤ ZnO+MgO ≤ 20.00 mol%, preferably, 13.00 mol% ≤ ZnO+MgO ≤ 17.30 mol%; by having a sufficient amount of ZnO and MgO in the composition, it helps to ensure that a sufficient content of the main crystal phase can precipitate in the spinel glass-ceramics, so as to form the desired crystal phase structure. In some embodiments of the present application, the value of ZnO + MgO can be 12.00 mol%, 13.00 mol%, 13.30 mol%, 13.50 mol%, 13.80 mol%, 14.00 mol%, 14.30 mol%, 14.50 mol%, 14.80 mol%, 15.00 mol%, 15.30 mol%, 15.50 mol%, 15.80 mol%, 16.00 mol%, 16.30 mol%, 16.50 mol%, 16.80 mol%, 17.00 mol%, 17.30 mol%, 18.00 mol%, 19.00 mol% or 20.00 mol%, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as a spinel glass-ceramic with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as a spinel glass-ceramic with the required properties of the present application can be obtained. In some embodiments of the present application, based on the molar percentages of the respective oxides in the composition, the composition of the substrate glass or spinel glass-ceramic further satisfies: 9.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 22.00 mol%, preferably, 10.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 20.00 mol%; by making the content of Al2O3 in the composition higher than the sum of the contents of MgO and ZnO, while ensuring the formation of the main crystal phase, an appropriate amount of Al can be present in the residual glass phase. On the one hand, it helps to exert the synergistic effect of Si and Al, enabling the residual glass phase to form a specific network structure, thereby improving the intrinsic strength of the spinel glass-ceramic. On the other hand, it helps to promote ion exchange and improve the chemical strengthening effect of the spinel glass-ceramic. In some embodiments of the present application, the value of Al2O3 - (MgO + ZnO) can be 9.00 mol%, 10.00 mol%, 11.00 mol%, 12.00 mol%, 13.00 mol%, 14.00 mol%, 15.00 mol%, 16.00 mol%, 17.00 mol%, 18.00 mol%, 19.00 mol%, 20.00 mol%, 21.00 mol% or 22.00 mol%, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as a spinel glass-ceramic with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as a spinel glass-ceramic with the required properties of the present application can be obtained. In some embodiments of the present application, in terms of the molar percentages of the respective oxides in the composition, the composition of the substrate glass or spinel glass-ceramic further satisfies: 5.00 mol% ≤ Na₂O + Li₂O ≤ 15.00 mol%, preferably, 6.00 mol% ≤ Na₂O + Li₂O ≤ 13.50 mol%. By having a sufficient amount of Na and Li in the composition, it helps to improve the ion-exchange performance of the spinel glass-ceramic, thereby ensuring that after chemical strengthening of the spinel glass-ceramic, the desired surface stress level and deep stress level can be obtained, so as to obtain the desired stress structure and achieve the high mechanical strength and high damage resistance of the strengthened spinel glass-ceramic. In some embodiments of the present application, the value of Na₂O + Li₂O can be 5.00 mol%, 5.50 mol%, 6.00 mol%, 6.50 mol%, 7.00 mol%, 7.50 mol%, 8.00 mol%, 8.50 mol%, 9.00 mol%, 9.50 mol%, 10.00 mol%, 10.50 mol%, 11.00 mol%, 11.50 mol%, 12.00 mol%, 12.50 mol%, 13.00 mol%, 13.50 mol%, 14.00 mol%, 14.50 mol% or 15.00 mol%, or a value within the numerical range formed by any two of the above values as endpoints, as long as a spinel glass-ceramic with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as a spinel glass-ceramic with the required performance of the present application can be obtained. In the present application, by making the spinel glass-ceramic of the present application satisfy at least one of the above relationships ZnO + MgO, Al₂O₃ - (MgO + ZnO), Na₂O + Li₂O, it helps to obtain a high content of (Zn, Mg)Al₂O₄ crystal phase with high hardness and high modulus to further improve the intrinsic strength of the spinel glass-ceramic, or helps to further improve the ion-exchange effect of the spinel glass-ceramic to obtain the desired stress level. In the present application, each substance in the above relationships ZnO / MgO, Li₂O / (Al₂O₃ - (MgO + ZnO) + SiO₂), (Al₂O₃ - (MgO + ZnO)) / SiO₂, Na₂O / Li₂O, ZnO + MgO, Al₂O₃ - (MgO + ZnO), Na₂O + Li₂O represents the molar percentage content of the corresponding substance. For example, ZnO represents the molar percentage content of ZnO, MgO represents the molar percentage content of MgO, etc., which will not be elaborated one by one in the present application. In some embodiments of the present application, the spinel glass-ceramic is transparent in the visible light range. In the present application, the visible light range refers to light within the wavelength range of 360 nm to 740 nm; "being transparent in the visible light range" means that the average transmittance of visible light is greater than 80%. In some embodiments of the present application, for a 0.7-mm-thick spinel glass-ceramic, the transmittance T at a wavelength of 550 nm is greater than or equal to 85%. The transmittance of the 0.7-mm-thick spinel glass-ceramic at a wavelength of 550 nm within the above range indicates that the spinel glass-ceramic of the present application has high light transmittance. At the same time, the spinel glass-ceramic of the present application can also be chemically strengthened to obtain high mechanical strength and high anti-damage performance, with excellent anti-drop impact performance, effectively broadening the application scenarios and application fields of the spinel glass-ceramic of the present application. In some embodiments of the present application, the transmittance T can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. In the present application, by making the spinel glass-ceramic satisfy a specific crystal phase structure, on the one hand, it is beneficial for the spinel glass-ceramic to obtain high intrinsic strength, and on the other hand, it is beneficial to improve the chemical strengthening effect of the spinel glass-ceramic, enabling it to obtain an ultra-high compressive stress layer depth and a large deep stress through chemical strengthening, thereby being beneficial to improving the mechanical strength and anti-damage performance of the spinel glass-ceramic. The relevant characteristics of the X-ray diffraction pattern can reflect the crystal phase structure of the glass-ceramic, including the crystal phase composition, crystal size, etc. In some embodiments of the present application, in the X-ray diffraction pattern of the spinel glass-ceramic, among the characteristic peaks within the range of 2θ angles from 28° to 32°, the peak with the maximum peak intensity is the first characteristic peak; among the characteristic peaks within the range of 2θ angles from 36° to 38°, the peak with the maximum peak intensity is the second characteristic peak. The peak intensity ratio X of the first characteristic peak to the second characteristic peak is from 0.80 to 1.50, preferably the peak intensity ratio X is from 0.85 to 1.30. When the peak intensity ratio X of the spinel glass-ceramic is within the above range, it indicates that a suitable crystal integrity is obtained in the spinel glass-ceramic, which further helps to ensure that the spinel glass-ceramic obtains better optical and strengthening effects. In some embodiments of the present application, the peak intensity ratio X can be 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, or 1.50, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required performance of the present application can be obtained. In some embodiments of the present application, in the X-ray diffraction pattern of the spinel glass-ceramic, the characteristic peak of the

[0400] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located within the range of 2θ angles from 44° to 46°, the characteristic peak of the

[0311] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located within the range of 2θ angles from 34° to 38°, and the characteristic peak of the

[0440] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located within the range of 2θ angles from 64° to 67°; the full width at half maximum W

[0400] of the

[0400] crystal plane characteristic peak is from 0.650° to 1.800°, preferably W

[0400] is from 0.900° to 1.600°; the full width at half maximum W

[0311] of the

[0311] crystal plane characteristic peak is from 0.900° to 2.800°, preferably W

[0311] is from 1.100° to 2.230°; the full width at half maximum W

[0440] of the

[0440] crystal plane characteristic peak is from 0.750° to 2.000°, preferably W

[0440] is from 0.900° to 1.600°. When the W

[0400] 、W

[0311] 、W

[0440] of the spinel glass-ceramic is within the above range, it indicates that in the crystal phase structure of the spinel glass-ceramic, the (Zn, Mg)Al2O4 crystal phase has a suitable average crystal size and satisfies a specific crystal phase structure, which is not only beneficial to endowing the spinel glass-ceramic with high intrinsic strength, but also beneficial to ensuring an ideal stress structure obtained by chemical strengthening of the spinel glass-ceramic. At the same time, it helps the spinel glass-ceramic to obtain the desired optical properties. In some embodiments of the present application, W

[0400] The value can be 0.650°, 0.700°, 0.800°, 0.900°, 1.000°, 1.100°, 1.200°, 1.300°, 1.400°, 1.500°, 1.600°, 1.700° or 1.800°, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass ceramic with the performance required by this application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the performance required by this application can be obtained. In some embodiments of this application, W

[0311] The value can be 0.900°, 1.000°, 1.100°, 1.200°, 1.300°, 1.400°, 1.500°, 1.600°, 1.700°, 1.800°, 1.900°, 2.000°, 2.100°, 2.200°, 2.2300°, 2.300°, 2.400°, 2.500°, 2.600°, 2.700°, or 2.800°, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass ceramic with the performance required by this application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the performance required by this application can be obtained. In some embodiments of this application, W

[0440] The value can be 0.750°, 0.800°, 0.900°, 1.000°, 1.100°, 1.200°, 1.300°, 1.400°, 1.500°, 1.600°, 1.700°, 1.800°, 1.900° or 2.000°, or a value within the numerical range formed by any two of the above numerical values as endpoints, as long as the spinel glass ceramic with the performance required by this application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the performance required by this application can be obtained. This application has no special restrictions on the thickness t of the spinel glass ceramic, as long as the purpose of this application can be achieved. Exemplarily, the thickness t of the spinel glass ceramic satisfies: 0.2 mm ≤ t ≤ 5.0 mm, preferably 0.2 mm ≤ t ≤ 2.0 mm. In this application, the spinel glass-ceramic or the strengthened spinel glass-ceramic prepared therefrom can be 2D, 2.5D, 3D or special-shaped glass products. In this application, the spinel glass-ceramic or the strengthened spinel glass-ceramic prepared therefrom can be glass products with equal thickness or unequal thickness. Those skilled in the art can make a choice according to their needs. Herein, "unequal thickness" means that the spinel glass-ceramic or the strengthened spinel glass-ceramic prepared therefrom contains at least two parts with different thicknesses. In some embodiments of this application, after the spinel glass-ceramic in any of the foregoing embodiments is chemically strengthened, a strengthened spinel glass-ceramic with high mechanical strength and high anti-damage performance can be obtained. The strengthened spinel glass-ceramic includes a region of a compressive stress layer extending from the surface of the strengthened spinel glass-ceramic to a compressive depth, and has a region of a tensile stress layer inside. It should be understood that after the chemical strengthening treatment and the ion exchange process, the composition at the surface of the glass-ceramic product may be different from the composition of the glass-ceramic before the ion exchange process. This is because when ion exchange is carried out, in the newly formed glass-ceramic (such as the spinel glass-ceramic in this application), one type of alkali metal ion (for example, Li + or Na + ) at the surface of the glass-ceramic will be replaced by a larger alkali metal ion (for example, Na + or K + ) respectively. However, in the embodiment, the glass composition and phase assemblage at the center of the depth of the glass-ceramic product or near the depth center are still the composition of the newly formed glass-ceramic. That is to say, in this application, the composition and phase assemblage at the center of the strengthened spinel glass-ceramic obtained by chemical strengthening are the same as or substantially the same as those of the spinel glass-ceramic in this application. Meanwhile, in the spinel glass-ceramics of the present application, neither the main crystal phase (Zn, Mg)Al₂O₄ crystal phase nor the secondary crystal phase tetragonal ZrO₂ crystal phase contains alkali metal ions, so they do not participate in the ion exchange during the chemical strengthening process. Based on this, the crystal phase structure of the strengthened spinel glass-ceramics obtained by chemical strengthening in the present application is basically the same as that of the spinel glass-ceramics. That is to say, the crystal phase structure characteristics such as the crystal phase content, crystal composition, crystal size, and X-ray diffraction pattern characteristics of the strengthened spinel glass-ceramics obtained by the chemical strengthening process in the present application are basically the same as those of the spinel glass-ceramics in the present application. As shown in Figure 9, in Example 1, the XRD patterns of the spinel glass-ceramics before chemical strengthening and the strengthened spinel glass-ceramics after chemical strengthening are basically the same. Additionally, as shown in Figure 10, in the present application, before and after chemical strengthening, the transmittance of the spinel glass-ceramics is also basically the same as that of the strengthened spinel glass-ceramics. That is to say, in the present application, by using spinel glass-ceramics with high transmittance, strengthened spinel glass-ceramics products with equally excellent transmittance can be obtained through chemical strengthening treatment. In some embodiments of the present application, the depth of the compressive stress layer DOL_0 of the above-mentioned strengthened spinel glass-ceramics ≥ 0.21t, preferably, 0.21t ≤ DOL_0 ≤ 0.25t, where t is the thickness of the strengthened spinel glass-ceramics. Exemplarily, when the thickness t of the strengthened spinel glass-ceramics is 0.7 mm, 147 μm ≤ DOL_0 ≤ 175 μm. Specifically, DOL_0 can be 147 μm, 154 μm, 161 μm, 168 μm, or 175 μm, or a value within the numerical range formed by any two of the above values, as long as the strengthened spinel glass-ceramics with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. The strengthened spinel glass-ceramics having the above DOL_0 indicates that the strengthened spinel glass-ceramics have an ultra-high depth of the compressive stress layer, so that the energy driving crack propagation during an external impact can be more effectively offset. In some embodiments of the present application, the CS_50 of the above-mentioned strengthened spinel glass-ceramics ≥ 100 MPa, preferably, 100 MPa ≤ CS_50 ≤ 250 MPa. The range of CS_50 of the strengthened spinel glass-ceramics within the above range indicates that the compressive stress at a depth of 50 μm from the surface of the strengthened spinel glass-ceramics is high, which further indicates that the strengthened spinel glass-ceramics have a high surface stress level, thus effectively improving the anti-drop impact performance of the strengthened spinel glass-ceramics. In some embodiments of the present application, ∣CT_AV∣ of the above-mentioned strengthened spinel glass-ceramics is ≥ 70 MPa, preferably, 70 MPa ≤ ∣CT_AV∣ ≤ 110 MPa. The strengthened spinel glass-ceramics having the above ∣CT_AV∣ indicates that the spinel glass-ceramics have a large deep-layer stress, directly reflecting that the strengthened spinel glass-ceramics have a high surface stress level, thus being beneficial to offset more external impact energy. In some embodiments of the present application, ∣CT_CV∣ of the above-mentioned strengthened spinel glass-ceramics is ≥ 80 MPa, preferably, 80 MPa ≤ ∣CT_CV∣ ≤ 150 MPa. The ∣CT_CV∣ of the strengthened spinel glass-ceramics within the above range indicates that the strengthened spinel glass-ceramics have a large deep-layer stress, and also reflects that the strengthened spinel glass-ceramics have a high surface stress level, thus being beneficial to offset more external impact energy. In some embodiments of the present application, the Vickers hardness of the above-mentioned strengthened spinel glass-ceramics is greater than or equal to 790 kgf / mm 2 , preferably 790 kgf / mm 2 to 1000 kgf / mm 2 . The Vickers hardness of the strengthened spinel glass-ceramics within the above range indicates that the strengthened spinel glass-ceramics have a high hardness, thereby ensuring its excellent mechanical properties. In some embodiments of the present application, the fracture toughness of the above-mentioned strengthened spinel glass-ceramics is greater than or equal to 1.00 MPa·m 1 / 2 , preferably greater than or equal to 1.20 MPa·m 1 / 2 . In some embodiments, the fracture toughness of the above-mentioned strengthened spinel glass-ceramics can be 1.00 - 2.00 MPa·m 1 / 2 , 1.20 MPa·m 1 / 2 to 2.00 MPa·m 1 / 2 or 1.55 MPa·m 1 / 2 to 2.00 MPa·m 1 / 2 , as long as the strengthened spinel glass-ceramics with the required performance of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. The fracture toughness of the strengthened spinel glass-ceramics within the above range indicates that the strengthened spinel glass-ceramics have a high fracture toughness, thereby ensuring its excellent mechanical properties. In some embodiments of the present application, the above-mentioned reinforced spinel glass-ceramics with a thickness of 0.7 mm are subjected to a drop resistance test using 80-mesh sandpaper, and the average sandpaper drop resistance height of the reinforced spinel glass-ceramics is greater than or equal to 1.00 m, and preferably the average sandpaper drop resistance height is greater than or equal to 1.40 m. In some embodiments, the above-mentioned reinforced spinel glass-ceramics with a thickness of 0.7 mm are subjected to a drop resistance test using 80-mesh sandpaper, and the average sandpaper drop resistance height of the reinforced spinel glass-ceramics can be 1.00 m to 2.50 m, 1.40 m to 2.50 m, or 1.50 m to 2.50 m, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. It should be understood that in a specific embodiment, any of the above ranges can be combined with any other ranges, as long as the spinel glass-ceramics with the required performance of the present application can be obtained. The average sandpaper drop resistance height H of the 0.7 mm thick reinforced spinel glass-ceramics is within the above range, indicating that the reinforced spinel glass-ceramics has high damage resistance, especially excellent drop impact resistance. In some embodiments of the present application, a 10 mm diameter round head metal pressure rod is used to extrude the 0.7 mm thick reinforced spinel glass ceramics, and the single rod static pressure strength that the reinforced spinel glass ceramics can withstand is tested. The single rod static pressure strength that the reinforced spinel glass ceramics can withstand is greater than 500 N, preferably greater than 550 N. This shows that the reinforced spinel glass ceramics have good anti-extrusion performance and good compressive resistance. The preparation method of the spinel glass ceramic in any of the aforementioned embodiments of the present application may include but is not limited to the following steps: (1) Preparation of substrate glass: Expressed as the molar percentage of oxides, the substrate glass or spinel glass ceramic is prepared according to the composition of any of the aforementioned embodiments. After uniform mixing, the substrate glass is prepared by conventional methods known in the art. The substrate glass preparation methods include but are not limited to float, overflow, rolling, casting or continuous melting methods. The present application does not limit the various parameters in the substrate glass preparation process, as long as the substrate glass with the required performance of the present application can be obtained. (2) Preparation of spinel glass ceramics: heat-treating the substrate glass obtained in step (1), wherein the heat treatment includes but is not limited to one-step heat treatment or multiple-step heat treatment, to obtain the spinel glass ceramics in any of the aforementioned embodiments of the present application. The present application does not limit the parameters in the preparation process, as long as the spinel glass ceramics with the required performance of the present application can be obtained. In some embodiments of the present application, the method for preparing the substrate glass in the above step (1) may include, but is not limited to, the following steps: proportioning according to the composition of the substrate glass or spinel glass-ceramic in any of the foregoing embodiments, mixing evenly, melting, forming, cooling, and annealing to obtain the substrate glass. The present application does not particularly limit the temperature and time of melting, as long as each component can be fully melted. Preferably, the melting temperature is 1550°C to 1800°C, and the preferred melting time is 3h to 12h. The present application does not limit the forming method, as long as the purpose of the present application can be achieved. For example, it can be cast into a forming mold to form a glass brick. The present application does not limit the cooling temperature, as long as the purpose of the present application can be achieved. Preferably, the cooling temperature is 800°C to 1000°C. The present application does not limit the annealing temperature and time, as long as the purpose of the present application can be achieved. Preferably, the annealing temperature is 500°C to 700°C and the time is 20h to 26h. In some embodiments of the present application, the heat treatment in the above step (2) includes nucleation treatment and crystallization treatment. Preferably, the temperature T1 of the nucleation treatment is 600 °C to 850 °C, and more preferably T1 is 650 °C to 850 °C. In some embodiments, the temperature T1 of the nucleation treatment can be 600 °C, 625 °C, 650 °C, 675 °C, 680 °C, 690 °C, 700 °C, 710 °C, 720 °C, 725 °C, 730 °C, 740 °C, 750 °C, 775 °C, 800 °C, 825 °C or 850 °C, or a value within the numerical range formed by any two of the above values, as long as the spinel glass ceramic with the required performance of the present application can be obtained. Preferably, the nucleation treatment time t1 is 0 h to 72 h, more preferably t1 is 0 h to 24 h, and even more preferably t1 is 0 h to 8 h. In some embodiments, the nucleation treatment time t1 can be 0 h, 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 7 h, 8 h, 16 h, 24 h, 32 h, 40 h, 48 h, 56 h, 64 h or 72 h, or a value within the numerical range formed by any two of the above values, as long as the spinel glass ceramic with the required performance of the present application can be obtained. Preferably, the temperature T2 of the crystallization treatment is 700 °C to 1000 °C. In some embodiments, the temperature T2 of the crystallization treatment can be 700 °C, 710 °C, 720 °C, 730 °C, 740 °C, 750 °C, 760 °C, 770 °C, 780 °C, 790 °C, 800 °C, 810 °C, 820 °C, 830 °C, 840 °C, 850 °C, 875 °C, 900 °C, 925 °C, 950 °C, 975 °C or 1000 °C, or a value within the numerical range formed by any two of the above values, as long as the spinel glass ceramic with the required performance of the present application can be obtained. Preferably, the crystallization treatment time t2 is 10 min to 400 min, and preferably t2 is 10 min to 120 min. In some embodiments, the crystallization treatment time t2 can be 10 min, 20 min, 30 min, 40 min, 50 min, 60 min, 70 min, 80 min, 90 min, 100 min, 110 min, 120 min, 150 min, 170 min, 200 min, 220 min, 250 min, 280 min, 300 min, 320 min, 350 min, 370 min or 400 min, or a value within the numerical range formed by any two of the above values, as long as the spinel glass ceramic with the required performance of the present application can be obtained. It should be understood that in a specific embodiment, any of the above ranges can be combined with any other range, as long as the spinel glass ceramic with the required performance of the present application can be obtained. In this application, when preparing spinel glass ceramics by heat-treating substrate glass, one-step heat treatment can be carried out, or two-step or multi-step heat treatment can be carried out. If one-step heat treatment is carried out, it means that the nucleation treatment is not carried out separately, but directly heated in one step, and the nucleation and the growth of the target crystal are carried out at the temperature reached during the one-step heating process, which can be understood as directly carrying out the crystallization treatment. If two-step heat treatment is carried out, it means that two heating processes are carried out. First, the nucleation treatment, that is, the nucleation treatment, is carried out, and then the growth treatment of the target crystal, that is, the crystallization treatment, is carried out. If multi-step heat treatment is carried out, the stepwise heating method is adopted in the nucleation treatment stage and / or the crystallization treatment stage. That is to say, during the whole heat treatment process, multiple (more than two) heating processes will be carried out. In this application, the nucleation treatment is to heat up to the specified nucleation treatment temperature (also called the nucleation temperature), and after reaching the nucleation treatment temperature, keep it warm for a certain period of time. Here, the holding time is the nucleation treatment time (also called the nucleation time); the crystallization treatment is to heat up to the specified crystallization treatment temperature (also called the crystallization temperature), and after reaching the crystallization treatment temperature, keep it warm for a certain period of time. Here, the holding time is the crystallization treatment time (also called the crystallization time). In some embodiments of this application, in step (2), when carrying out the heat treatment, it is preferably to control the heating rate to be 5K / min to 15K / min, preferably 5K / min to 10K / min. In some embodiments, the heating rate can be 5K / min, 6K / min, 7K / min, 8K / min, 9K / min, 10K / min, 11K / min, 12K / min, 13K / min, 14K / min or 15K / min, or a value within the numerical range formed by any two of the above values as endpoints, as long as the spinel glass ceramics with the required properties of this application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass ceramics with the required properties of this application can be obtained. In some embodiments of this application, after chemically strengthening the spinel glass ceramics prepared in the above step (2), the strengthened spinel glass ceramics in any of the above embodiments can be prepared. In some embodiments of the present application, the salt bath for chemically strengthening the spinel glass-ceramic is a molten salt containing potassium salt and / or sodium salt. The potassium salt includes one or more of potassium nitrate, potassium sulfate, and potassium carbonate, preferably potassium nitrate; the sodium salt includes at least one of sodium nitrate, sodium sulfate, and sodium carbonate, preferably sodium nitrate. Preferably, the temperature T3 of the salt bath for chemical strengthening treatment is 380°C to 600°C, preferably T3 is 400°C to 550°C, and more preferably T3 is 400°C to 500°C. In some embodiments, the temperature T3 of the salt bath for chemical strengthening treatment can be 380°C, 400°C, 425°C, 450°C, 475°C, 500°C, 525°C, 550°C, 575°C or 600°C, or a value within the numerical range formed by any two of the above values, as long as the spinel glass-ceramic with the required properties of the present application can be obtained. Preferably, the time t3 for chemical strengthening treatment is 1h to 48h, preferably t3 is 2h to 24h, and more preferably t3 is 2h to 15h. In some embodiments, the time t3 for chemical strengthening treatment can be 1h, 4h, 8h, 12h, 16h, 20h, 24h, 28h, 32h, 36h, 40h, 44h or 48h, or a value within the numerical range formed by any two of the above values, as long as the spinel glass-ceramic with the required properties of the present application can be obtained. It should be understood that in specific embodiments, any of the above ranges can be combined with any other range, as long as the spinel glass-ceramic with the required properties of the present application can be obtained. In some embodiments of the present application, a certain amount (such as 0wt% to 0.5wt%) of lithium salt can be added to the salt bath. By adopting the above chemical strengthening treatment process, strengthening the spinel glass-ceramic with a specific composition and structure can obtain a strengthened spinel glass-ceramic with excellent surface stress characteristics and excellent deep layer stress characteristics, thereby ensuring that the obtained strengthened spinel glass-ceramic has high mechanical strength and excellent anti-damage performance. It should be understood that when performing chemical strengthening treatment, one-step chemical strengthening treatment can be carried out, or two-step or multi-step chemical strengthening treatment can be carried out. In the present application, the temperature of chemical strengthening treatment is the temperature of the salt bath; when the chemical strengthening treatment includes two steps or more, the time of chemical strengthening treatment is the sum of the time of each step of chemical strengthening treatment. In some embodiments of the present application, when the chemical strengthening treatment includes two steps or more, the temperature and time of each step of chemical strengthening treatment can be the same or different. In this application, the stress distribution structure of the strengthened spinel glass-ceramics is closely related to the spinel glass-ceramics composition (including oxide composition and crystal phase composition), salt bath composition, salt bath temperature, and chemical strengthening treatment time. Only when the spinel glass-ceramics with a specific composition are chemically strengthened for an appropriate time in a suitable salt bath (with a suitable composition and temperature) can the prepared strengthened spinel glass-ceramics obtain a specific stress distribution structure, thereby achieving the excellent effects expected in this application. In this application, the spinel glass-ceramics in any of the foregoing embodiments can be used to fabricate glass devices with high strength. For example, the glass devices can include, but are not limited to, work surfaces, other surfaces, appliance doors, floor tiles, wall panels, storage containers, mobile phone screens, mobile phone backs, electronic device frames, vehicle windshields, aircraft windshields, or marine vessel windshields, etc. The spinel glass-ceramics provided in this application can obtain a high stress level after chemical strengthening, and thus obtain high mechanical strength and high damage resistance performance, especially excellent drop impact resistance performance. The glass devices prepared by chemically strengthening the spinel glass-ceramics of this application can ensure excellent mechanical properties as well. In this application, the spinel glass-ceramics in any of the foregoing embodiments can be applied in electronic devices. In some embodiments of this application, the electronic device includes at least one of a mobile phone, a tablet computer, smart wearables, a display, and a television. For example, the electronic device can include, but is not limited to, a mobile phone, a tablet computer, smart wearables, a display, or a television, etc. Smart wearables can include, but are not limited to, smartwatches, smart bracelets, smart glasses, etc., and displays can include, but are not limited to, high-definition displays, in-vehicle displays, on-board displays, etc. Exemplarily, the electronic device can include a housing and electronic components partially located within the housing. The housing includes a front surface, a rear surface, and side surfaces, and the electronic components include a display device located at or adjacent to the front surface of the housing. The spinel glass-ceramics provided in this application can be applied to the front surface and / or rear surface and / or side surfaces of the housing after chemical strengthening. In some embodiments, the front surface and / or rear surface of the housing can be of equal thickness or unequal thickness. In some embodiments, the front surface and / or rear surface of the housing can be 2D, 2.5D, 3D, or irregular-shaped. Testing methods: 1. X-ray diffraction (XRD) test The sample to be tested is crushed and ground into a sample with a particle size less than 75 μm. The ground sample is then tested using an X-ray diffractometer to obtain the XRD diffraction peak curve and XRD diffraction data. The XRD diffraction data is further analyzed using JADE Standard 8.6 software to obtain the crystal phase of the sample. The X-ray diffractometer is Shimadzu XRD-6100, with 2θ = 10° to 80°, a scanning speed of 6° / min, a working voltage of 40 kV, and a working current of 30 mA. Among them, the sample to be tested is spinel glass-ceramics or strengthened spinel glass-ceramics. Average crystal size: Using the result data obtained from XRD testing, according to the Scherrer formula D = Kλ / (βcosθ), the average crystal size of the sample can be calculated. Among them, λ is the X-ray wavelength, λ = 0.154056 nm, β is the full width at half maximum of the diffraction peak, K = 0.89, and θ is the Bragg diffraction angle. Specifically, the RAW file (diffraction pattern) output by the XRD instrument is curve-fitted in JADE Standard 8.6 software, and Jade outputs a fitting report. According to the 2θ value and Peak FWHM value corresponding to each diffraction peak in the fitting report, and converting the Peak FWHM value to radian measure: β = (FWHM / 180×3.14), after calculating the crystal size of each diffraction peak through the Scherrer formula D = Kλ / (βcosθ) and averaging them, the average crystal size is obtained. Average crystal size of the (Zn,Mg)Al2O4 crystal phase: The RAW file (diffraction pattern) output by the XRD instrument is subjected to phase retrieval and curve fitting in JADE Standard 8.6 software. In the output fitting report, select the 2θ values and Peak FWHM values corresponding to the three diffraction peaks of the (Zn,Mg)Al2O4 crystal phase in the ranges of 2θ angles from 34° to 38°, from 44° to 46°, and from 64° to 67°. Convert the Peak FWHM value to radian measure: β = (FWHM / 180×3.14). After calculating the crystal sizes of the three diffraction peaks through the Scherrer formula D = Kλ / (βcosθ) and averaging them, the average crystal size of the (Zn,Mg)Al2O4 crystal phase is obtained. Among them, λ is the X-ray wavelength, λ = 0.154056 nm, β is the full width at half maximum of the diffraction peak, K = 0.89, and θ is the Bragg diffraction angle. Crystal phase content: Import the test results (RAW format) of XRD into JADE Standard 8.6 software for fitting and calculation to obtain the crystal phase content in the glass-ceramics, and then the total content of each crystal phase in the glass-ceramics can be calculated. The ratio of the area of the fitted crystal phase peak to the area of all the fitted peaks is the crystal phase content of the corresponding crystal phase. The ratio of the area of the fitted crystal phase peak of (Zn,Mg)Al2O4 to the area of all the fitted peaks is the crystal phase content W of the (Zn,Mg)Al2O4 crystal phase. [(Zn，Mg)Al2O4] ; The ratio of the area of the fitted crystal phase peak of tetragonal ZrO2 to the area of all the fitted peaks is the crystal phase content W of the tetragonal ZrO2 crystal phase. [ZrO2] According to W [(Zn，Mg)Al2O4] and W [ZrO2] , the ratio (mass ratio Z) of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase and the total crystal phase content W are calculated. Peak intensity ratio: Import the test results (RAW format) of XRD into JADE Standard 8.6 software to find the peaks, determine the 2θ position of the peaks and the corresponding original intensity, and calculate the peak intensity ratio. Specifically, it is the peak intensity ratio X of the first characteristic peak and the second characteristic peak. Full width at half maximum: Import the test results (RAW format) of XRD into JADE Standard 8.6 software for phase retrieval and curve fitting, and obtain the 2θ position of the peak, the corresponding crystal plane, the full width at half maximum, and the fitted intensity in the output fitting report. Calculate the ratio according to the fitted intensity of the corresponding crystal plane. Specifically, it is the fitted peak intensity I

[0400] of the characteristic peak of the

[0400] crystal plane, the fitted peak intensity I

[0311] of the characteristic peak of the

[0311] crystal plane, the fitted peak intensity I

[0440] of the characteristic peak of the

[0440] crystal plane, the full width at half maximum W

[0400] of the characteristic peak of the

[0400] crystal plane, the full width at half maximum W

[0311] of the characteristic peak of the

[0311] crystal plane, the full width at half maximum W

[0440] of the characteristic peak of the

[0440] crystal plane, I

[0400] / I

[0311] and I

[0440] / I

[0311] . Considering that the noise in the test process affects peak finding, the XRD diffraction peak curve can be smoothed no more than three times. 2. Tests of |CT_AV|, DOL_0, CS_50, ∣CT_CV∣ Use a stress meter SLP-2000 for testing. The light source wavelength is 518 nm, SOC = 25.5 (nm / cm) / MPa, refractive index = 1.60, exposure time: 300 usec. When testing the surface CS_50, |CT_AV|, DOL_0, |CT_CV|, it is necessary to first drop the conductive liquid on the stress meter, then wipe the strengthened spinel glass ceramic sample to be tested clean, place it on the test path, and test its stress value. Among them, the stress meter is SLP-2000 and the conductive liquid used is the conductive liquid with a refractive index of 1.51. 3. Thickness test The thickness of the spinel glass ceramic is tested by a micrometer. It should be understood that during the chemical strengthening treatment, in the thickness direction of the spinel glass ceramic, the degree of ion exchange changes in a gradient from the surface to the center, and the overall increase in the exchange amount (mass) of Na-K and / or Li-Na generally does not exceed 1% of the total mass of the sample. Therefore, the expansion effect in the thickness direction is extremely slight, that is, before and after chemical strengthening, the thickness change of the spinel glass ceramic is very small and can be approximately considered that the thickness basically does not change. 4. Optical property test The sample to be tested is cleaned in an ultrasonic cleaner, and its cleaning conditions include: cleaning time: 10 min; cleaning agent used: dishwashing liquid diluted 10 times; cleaning temperature: 55 ± 10 °C; cleaning frequency: 30 ± 10 KHZ. Then, the transmittance of the sample to be tested at different wavelengths is measured by a haze meter, and the test is carried out with reference to the standard of "GB / T 7962.12-2010 Test methods for colorless optical glass - Part 12: Spectral transmittance within the spectrum". The haze meter used in this application is the Konica Minolta spectrophotometer CM-3600A made in Japan. Among them, the sample to be tested is spinel glass ceramic or strengthened spinel glass ceramic. 5. Test of Vickers hardness HV Select the strengthened spinel glass ceramic with a clean surface without visible scratches, pits, cracks and other damages by the naked eye as the specimen. Use a digital display small load Vickers hardness tester VTD405 (Beijing WoWei Technology Co., Ltd.) to test the Vickers hardness of the glass ceramic according to the national standard GB / T 37900-2019 "Test methods for hardness and fracture toughness of ultra-thin glass - Small load Vickers hardness indentation method", with a load of 300 gf and a load time of 10 s. The effectiveness of the indentation complies with the national standard GB / T 16534-2009 "Test methods for room temperature hardness of fine ceramics". When testing the Vickers hardness in this application, the glass ceramic sample with a length, width and thickness of 50 mm × 50 mm × 0.7 mm is tested. Three different positions are selected on the surface of the same specimen for measurement, and the average value is selected as the final test result. 6. Test of the surface K2O concentration content In this application, the surface K2O concentration of the strengthened spinel glass-ceramics is measured by an X-ray fluorescence spectrometer (XRF). The equipment model used is (Thermo Scientific ARL PERFORM’X), the target is Rh (rhodium), the tube voltage of the X-ray tube is 40 kW, the current is 60 mA, the collimator is 0.15, the crystal selected is LiF200, the detector selected is FPC, the test range is a 29-mm circle, the analysis software is UniQuant non-standard analysis, and the test method is the X_UQ method in the OXSAS analysis software. Specifically, the content of K element on the surface of the strengthened spinel glass-ceramics is measured by the X-ray fluorescence spectrometer (XRF), and then the surface K2O concentration is calculated. The calculation method is: surface K2O concentration = (content of K element on the surface × relative molecular mass of K2O) / (relative atomic mass of K element × 2). It should be understood that the content of K element on the surface = mass of K element / total mass of elements, and the total mass of elements = total mass of oxides. That is to say, the surface K2O concentration of the strengthened spinel glass-ceramics is the ratio of the mass of K2O to the total mass of oxides. Among them, the oxides include oxides such as SiO2, Al2O3, ZrO2, Na2O, and K2O that can be accurately measured by XRF, and do not include the content of oxides such as B2O3 that cannot be accurately measured by XRF. When using XRF for testing, non-standard testing is used, and the concentration of elements with atomic number 6 and below or their oxides in the strengthened spinel glass-ceramics is not tested. That is, when XRF measures the surface K2O concentration of the strengthened spinel glass-ceramics, the total mass of oxides measured does not include the mass of elements with atomic number 6 and below or their oxides in the strengthened spinel glass-ceramics. 7. Test of average anti-sanding paper drop height The average anti-sanding paper drop height refers to: the sum of the anti-sanding paper drop heights measured for each sample among multiple samples of the strengthened spinel glass-ceramics in the same example or the same comparative example, divided by the number of samples of the strengthened spinel glass-ceramics, which can be used to characterize the anti-drop damage performance of the strengthened spinel glass-ceramics. For each batch, 10 samples of the same strengthened spinel glass-ceramics are taken for testing, and the average anti-sanding paper drop height is: where n is the number of samples of the strengthened spinel glass-ceramics tested in each batch, and hi is the anti-sanding paper drop height measured for a single sample. Among them, the test method for the anti-sanding paper drop height of a single sample is as follows: Step 1: Stick 80-mesh sandpaper on the lower surface of a 160-g model machine, and place this model machine on a Green Map LT-SKDL-CD type drop tester. Step 2: Place a spinel glass-ceramic sample to be tested with a length, width, and thickness of 50 mm × 50 mm × 0.7 mm directly below the model machine, facing the sandpaper. Let the model machine drop and impact the spinel glass-ceramic sample directly below it from a certain drop height. If the spinel glass-ceramic sample does not break, the drop height of the model machine is increased regularly. For example, starting from a drop height of 0.4 m, conduct a drop impact on the sample. If it does not break, increase the height by 0.1 m each time and drop again until the spinel glass-ceramic sample breaks; Step 3: Record the previous drop height when the spinel glass-ceramic sample breaks as the anti-sandpaper drop height. For example, if the drop height at break is 0.5 m when the drop height is increased by 0.1 m each time, the anti-sandpaper drop height of the sample is 0.4 m. 8. Density In this application, an electronic density balance SD-200L from ALFA MIRAGE of Japan is used to measure the density of spinel. The test principle is the "Archimedes drainage method". 9. Fracture Toughness Test The test is carried out according to the national standard GB / T 37900-2019 "Test Methods for Hardness and Fracture Toughness of Ultra-Thin Glass - Small Load Vickers Hardness Indentation Method". Specifically, prepare the indentation in the same way as measuring the Vickers hardness, measure the crack lengths 2C1 and 2C2 in the diagonal direction of the indentation, and the maximum value cannot exceed the thickness of the spinel glass-ceramic. Measure at least 5 effective indentation morphologies on the surface of one specimen and calculate their average value as the final result value of the specimen. Modulus, unit is gigapascal (GPa); 2C1, 2C2: Crack propagation lengths in the diagonal direction of the indentation, unit is millimeter (mm), d1, d2 are: Indentation diagonal lengths, unit is millimeter (mm), F: Test load value, unit is newton (N). In the above test method, after shaping, cutting, and polishing the spinel glass-ceramic bricks in the examples and comparative examples, spinel glass-ceramic samples (such as polished wafers) with desired dimensions can be obtained, and then tested, such as a glass-ceramic polished wafer with a length, width, and thickness of 50 mm × 50 mm × 0.7 mm. 10. Single Rod Static Pressure Strength Test As shown in Figure 12, a circular glass-ceramic sample 10 to be tested with a diameter of 46 mm and a thickness of 0.7 mm is placed in the sample placement groove 21 of a customized fixture 20 (shown in Figures 13 and 14), and then placed on the bottom ring (not shown in the figure) of a tensile testing machine (LT-850A). The testing software is started, and the moving speed of the extrusion rod 30 (rod diameter 10 mm, ball head diameter 10 mm) is set to 10 mm / min. Click "Start Test", and the extrusion rod 30 will apply force to the center of the glass-ceramic sample 10 to be tested at the set moving speed until the glass-ceramic sample 10 to be tested breaks. The testing software will automatically read the force (N) when the glass-ceramic sample breaks, which is recorded as the test result. Ten glass-ceramic samples in the same state are tested, and the average value of the test results is taken, which is recorded as the single-rod static pressure strength that the glass-ceramic sample to be tested can withstand. The customized fixture in this testing method is a cylindrical fixture with a diameter of 65 mm and a height of 20 mm. The specific structure of the customized fixture is shown in Figures 13 and 14, where Φ1 = 65 mm, Φ2 = 46.02 mm, Φ3 = 44 mm, h1 = 20 mm, h2 = the thickness of the strengthened spinel glass-ceramic sample to be tested, and h3 = 15 mm. The height of the sample placement groove 21 in the fixture is equal to the thickness of the strengthened spinel glass-ceramic sample to be tested, and the strengthened spinel glass-ceramic sample to be tested can just be placed in the fixture. The stepped blind hole for placing the sample for testing set in the customized fixture is coaxial with the customized fixture. The fixture material is acrylic material. Example 1 <Preparation of Substrate Glass> According to the formulation 1 in Table 1, it is designed and converted into a glass production raw material formulation for batching. The total mass of the configured raw materials is 1000 g, and then it is mixed in a V-type mixer for 30 min. After mixing evenly, 5 g of clarifying agent NaCl is added, and then it is transferred to a platinum crucible and melted in a 1650 °C lifting furnace (lifting furnace model: SJF1750, manufacturer: Nanjing Boyuntong Instrument Technology Co., Ltd.) for 5 h, and then poured into a preheated stainless steel mold at 300 °C for molding and cooling. It is cooled to 900 °C, and then placed in a 600 °C annealing furnace for annealing for 24 h, and then cooled to room temperature with the furnace, obtaining the substrate glass. <Preparation of Spinel Glass-Ceramic> The above-prepared substrate glass is heat-treated in a resistance furnace (equipment model: SLX1400-40, manufacturer: Shanghai Shengli Testing Instrument Co., Ltd.) to obtain spinel glass-ceramic. In terms of the molar percentage of oxides, the composition of the prepared spinel glass-ceramic is the same as that of the substrate glass, as shown in Table 1 for details. Specifically, a two-step heat treatment process is adopted. First, the temperature is raised to the nucleation treatment temperature for nucleation treatment, and then the temperature is raised to the crystallization treatment temperature for crystallization treatment. The heating rate during nucleation treatment and crystallization is 10 K / min. Among them, the nucleation treatment temperature T1 is 740 °C, and the nucleation treatment time t1 is 480 min; the crystallization treatment temperature T2 is 800 °C, and the crystallization treatment time t2 is 10 min. As needed, the spinel glass-ceramics are successively cut, CNC machined (computer numerical control, that is, a numerical control machine tool, the model of the CNC instrument and equipment used in this application is: RCG500S), and polished to obtain smooth spinel glass-ceramic sheets of the required specifications. In this application, the specifications of the processed spinel glass-ceramic sheets are samples with a length, width, and thickness of 50 mm × 50 mm × 0.7 mm, and circular samples with a diameter of 46 mm and a thickness of 0.7 mm. <Preparation of Reinforced Spinel Glass-Ceramics> The spinel glass-ceramics are placed in a 100 wt% NaNO3 salt bath at 450 °C for the first-step strengthening treatment for 3 h, and then placed in a 100 wt% KNO3 salt bath at 430 °C for the second-step strengthening treatment for 2 h to obtain the reinforced spinel glass-ceramics. Examples 2 to 11 Except for adjusting the relevant preparation parameters according to Table 2, the rest are the same as in Example 1. Among them, the corresponding formulations in Table 2 are shown in detail in Table 1. Examples 12 to 14 Except for placing the corresponding spinel glass-ceramics in a 100 wt% NaNO3 salt bath at 450 °C for 4 h to obtain the corresponding reinforced spinel glass-ceramics according to Table 5, the rest are the same as in Example 1. Examples 15 to 17 Except for placing the corresponding spinel glass-ceramics in a 100 wt% KNO3 salt bath at 430 °C for 4 h to obtain the corresponding reinforced spinel glass-ceramics according to Table 6, the rest are the same as in Example 1. Comparative Examples 1 to 11 Except for adjusting the relevant preparation parameters according to Table 2, the rest are the same as in Example 1. Among them, the corresponding formulations in Table 2 are shown in detail in Table 1. Comparative Examples 12 to 15 Except for placing the corresponding spinel glass-ceramics in a 100 wt% NaNO3 salt bath at 450 °C for 4 h to obtain the corresponding reinforced spinel glass-ceramics according to Table 5, the rest are the same as in Example 1. Comparative Examples 16 to 19 Except for placing the corresponding spinel glass-ceramics in a 100 wt% KNO₃ salt bath at 430 °C for 4 h according to Table 6 to obtain the corresponding strengthened spinel glass-ceramics, the rest is the same as in Example 1. The formulations of each example and comparative example are shown in Table 1, and the preparation parameters and performance tests of each example and comparative example are shown in Tables 2 to 6. After testing, the spinel glass-ceramics of Examples 1 to 11 and Comparative Examples 1 to 11 all contain the main crystal phase (Zn, Mg)Al₂O₄ crystal phase and the secondary crystal phase tetragonal ZrO₂ crystal phase. The XRD patterns of some examples and comparative examples are shown in Figures 2 to 7, 9, and 11. Referring to Tables 1 to 4, the compositions and structures of the spinel glass-ceramics of Examples 1 to 11 are within the scope of the technical solutions of this application. However, the compositions and structures of the spinel glass-ceramics in Comparative Examples 1 to 11 do not fully meet the requirements of the solutions of this application. Using the spinel glass-ceramics in the examples of this application for chemical strengthening can obtain a stress level significantly superior to that of the comparative examples. For example, the spinel glass-ceramics of this application can be chemically strengthened to obtain chemically strengthened spinel glass-ceramics with a higher depth of the compressive stress layer and a larger CT, etc. After testing, the chemically strengthened spinel glass-ceramics obtained by chemically strengthening the spinel glass-ceramics of this application have better anti-drop damage performance, can withstand a higher single-rod static pressure strength, have better anti-extrusion performance, higher mechanical strength, and at the same time have excellent light transmittance. Specifically, as shown in Figure 8, the transmittance of the spinel glass-ceramics in Example 1 to visible light is above 80.00%, so that the obtained strengthened spinel glass-ceramics are transparent in the visible light range. Examples 1 to 3 and Comparative Examples 6 to 9 all obtain spinel glass-ceramics by different heat treatment systems on the substrate glass with the composition of Formula 1, and their XRD diffraction patterns are shown in Figure 2. Referring to FIGS. 2, 5 and Table 3, in the XRD pattern of the spinel glass-ceramics of Example 1, there are a first characteristic peak in the range of 2θ angle from 28° to 32° and a second characteristic peak in the range of 2θ angle from 36° to 38°, and the peak intensity ratio X is 1.05. Referring to FIGS. 2 and 3, in the XRD pattern of the spinel glass-ceramics of Comparative Example 6, there is no second characteristic peak in the range of 2θ angle from 36° to 38°, so there is no peak intensity ratio X. In the spinel glass-ceramics of Comparative Example 6, the content of the (Zn,Mg)Al2O4 crystal phase is relatively low, and the calculation result of Formula C does not meet the scope of the present application, and the stress level of the strengthened spinel glass-ceramics prepared in Comparative Example 6 is relatively low. Referring to FIGS. 2 and 3, the peak intensity ratio X of the XRD pattern of the spinel glass-ceramics of Comparative Example 7 is 1.61. In the spinel glass-ceramics of Comparative Example 7, the content of the (Zn,Mg)Al2O4 crystal phase is also relatively low, and the half-peak widths of some crystal plane characteristic peaks do not meet the requirements of the present application, and the calculation result of Formula C also does not meet the scope of the present application, and the stress level of the strengthened spinel glass-ceramics prepared in Comparative Example 7 is also relatively low. Referring to FIGS. 2 and 4, in the XRD pattern of the spinel glass-ceramics of Comparative Example 8, a split peak appears in the range of 2θ angle from 28° to 32°. In the spinel glass-ceramics of Comparative Example 8, the content of the (Zn,Mg)Al2O4 crystal phase is relatively high, the average crystal size of the (Zn,Mg)Al2O4 crystal phase is relatively high, and the half-peak widths of the crystal plane characteristic peaks do not meet the requirements of the present application, and the calculation result of Formula C also does not meet the scope of the present application, and the stress level of the strengthened spinel glass-ceramics prepared in Comparative Example 8 is relatively low. Referring to FIG. 2, in the XRD pattern of the spinel glass-ceramics of Comparative Example 9, a split peak appears in the range of 2θ angle from 28° to 32°. In the spinel glass-ceramics of Comparative Example 9, the content of the (Zn,Mg)Al2O4 crystal phase is also relatively high, the average crystal size of the (Zn,Mg)Al2O4 crystal phase is also relatively high, and the calculation result of Formula C also does not meet the scope of the present application, and the stress level of the strengthened spinel glass-ceramics prepared in Comparative Example 9 is also relatively low. FIG. 3 is a refined diagram of the XRD pattern of the spinel glass-ceramics of Example 6 in Jade software. In the figure: the "XRD original curve" is drawn from the original data obtained by Shimadzu XRD-6100, the "fitting curve" is drawn from the fitting data output after curve fitting of the RAW file obtained by Shimadzu XRD-6100 in Jade software, the "uncertainty curve" is drawn from the difference between the XRD original data and the fitting data output by its Jade software, the "Bragg position of zirconia" is the peak position of the zirconia standard card matched by the XRD original data in Jade, and the "Bragg position of zinc-magnesium spinel" is the peak position of the zinc-magnesium spinel standard card matched by the XRD original data in Jade. Referring to FIG. 3 and Table 3, in the XRD pattern of the spinel glass-ceramic of Example 6, there are a first characteristic peak in the range of 28° to 32° of the 2θ angle and a second characteristic peak in the range of 36° to 38° of the 2θ angle, and the peak intensity ratio X is 0.97. For Comparative Example 10 and Comparative Example 11, spinel glass-ceramics were obtained by different heat treatment systems on the base glass with the composition of Formula 3, and their XRD diffraction patterns are shown in FIGS. 6 and 7. The XRD pattern of the spinel glass-ceramic of Comparative Example 10 is shown in FIG. 6. Split peaks appear in the range of 28° to 32° of the 2θ angle. In the spinel glass-ceramic of Comparative Example 10, the average crystal size of the (Zn, Mg)Al2O4 crystal phase is relatively high, and the calculation result of Formula C also does not meet the scope of the present application. The stress level of the strengthened spinel glass-ceramic prepared in Comparative Example 10 is relatively low. The XRD pattern of the spinel glass-ceramic of Comparative Example 11 is shown in FIG. 7. There is a tendency of split peaks in the range of 28° to 32° of the 2θ angle. In the spinel glass-ceramic of Comparative Example 11, the average crystal size of the (Zn, Mg)Al2O4 crystal phase is also relatively high, the half-peak width of some crystal plane characteristic peaks does not meet the requirements of the present application, and the calculation result of Formula C also does not meet the scope of the present application. The stress level of the strengthened spinel glass-ceramic prepared in Comparative Example 11 is also relatively low. For Comparative Examples 12 to 15 and Examples 12 to 14, spinel glass-ceramics were obtained by different heat treatment systems on the base glass with the composition of Formula 1, and using the same chemical strengthening treatment conditions, chemically strengthened spinel glass-ceramics were obtained. The depth of the compressive stress layer DOL-0 of Comparative Examples 12 to 15 is significantly lower than the example scheme of the present application, and the measured anti-drop damage height under the condition of 80-mesh sandpaper is also significantly lower than the technical scheme of the present application. For Comparative Examples 16 to 19 and Examples 15 to 17, spinel glass-ceramics were obtained by different heat treatment systems on the base glass with the composition of Formula 1, and using the same chemical strengthening treatment conditions, chemically strengthened spinel glass-ceramics were obtained. The single-rod static pressure strength that the chemically strengthened spinel glass-ceramics of Comparative Examples 16 to 19 can withstand is significantly lower than the example scheme of the present application, and the surface K2O content is also significantly lower than the example scheme of the present application. It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device. Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A spinel glass-ceramic, characterized in that, In terms of molar percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 3.00 mol% to 7.50 mol%, ZnO 7.00 mol% to 13.00 mol%, Na2O 1.00 mol% to 10.00 mol%, Li2O 2.50 mol% to 10.00 mol%. The spinel glass-ceramic contains (Zn,Mg)Al2O4 crystal phase accounting for 15.00 wt% to 45.00 wt% of the spinel glass-ceramic. Take W [(Zn，Mg)Al2O4] as the weight percentage of the (Zn, Mg)Al2O4 crystal phase in the spinel glass-ceramics, W [Al2O3] as the weight percentage of Al2O3 in the spinel glass-ceramics, W [MgO] as the weight percentage of MgO in the spinel glass-ceramics, W [ZnO] as the weight percentage of ZnO in the spinel glass-ceramics; A = (1 - W [(Zn，Mg)Al2O4] / 2) × W [Al2O3] / 2, B = (1 - W [(Zn，Mg)Al2O4] ) × (W [MgO] + W [ZnO] ), C = A / B, in the spinel glass-ceramic, 1.50 ≤ C ≤ 1.

85.

2. The spinel glass-ceramic according to claim 1, wherein In the spinel glass-ceramic, the value of A is 10.00% to 25.00%, preferably 14.00% to 25.00%; and / or the value of B is 7.50% to 12.50%, preferably 8.00% to 12.00%.

3. The spinel glass-ceramic according to claim 1 or 2, characterized in that, The spinel glass-ceramic also contains tetragonal ZrO2 crystal phase, and the total content of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase accounts for 25.00 wt% to 70.00 wt% of the spinel glass-ceramic, preferably 30.00 wt% to 50.00 wt% of the spinel glass-ceramic.

4. The spinel glass-ceramic according to any one of claims 1 to 3, characterized in that, In the spinel glass-ceramic, the ratio of the (Zn,Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase is 1.00 to 18.00, preferably 1.00 to 15.

00.

5. The spinel glass-ceramic according to any one of claims 1 to 4, characterized in that, In the spinel glass-ceramic, the average crystal size of the (Zn,Mg)Al2O4 crystal phase is 3.0 nm to 10.0 nm, preferably 4.0 nm to 8.0 nm, more preferably 4.0 nm to 7.5 nm.

6. The spinel glass ceramic according to any one of claims 1-5, characterized in that, In terms of molar percentage of oxides, the composition of the spinel glass-ceramic further includes: K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%.

7. The spinel glass-ceramic according to any one of claims 1 to 6, characterized in that, In terms of molar percentage of oxides, the composition of the spinel glass-ceramic includes: SiO2 35.00 mol% to 60.00 mol%, Al2O3 20.00 mol% to 40.00 mol%, ZrO2 2.00 mol% to 8.00 mol%, MgO 4.00 mol% to 7.00 mol%, ZnO 9.00 mol% to 12.00 mol%, Na2O 2.00 mol% to 10.00 mol%, Li2O 3.00 mol% to 10.00 mol%.

8. The spinel glass-ceramics according to any one of claims 1 to 7, characterized in that In terms of the molar percentage of oxides, the composition of the spinel glass-ceramic includes: 35.00 mol% to 50.00 mol% of SiO2, 25.00 mol% to 35.00 mol% of Al2O3, 3.00 mol% to 5.00 mol% of ZrO2, 4.00 mol% to 7.00 mol% of MgO, 9.00 mol% to 12.00 mol% of ZnO, 2.00 mol% to 10.00 mol% of Na2O, and 3.00 mol% to 10.00 mol% of Li2O.

9. The spinel glass-ceramics according to any one of claims 1 to 8, characterized in that, In terms of the molar percentage of each oxide in the composition of the spinel glass-ceramic, the composition of the spinel glass-ceramic satisfies: 1.30 ≤ ZnO / MgO ≤ 2.50; and / or, 0.05 ≤ Li2O / (Al2O3 - (MgO + ZnO) + SiO2) ≤ 0.20; and / or, 0.19 ≤ (Al2O3 - (MgO + ZnO)) / SiO2 ≤ 0.60; and / or, 0.26 ≤ Na2O / Li2O ≤ 3.

00.

10. The spinel glass-ceramic according to any one of claims 1 to 9, characterized in that, In terms of the molar percentage of each oxide in the composition of the spinel glass-ceramic, the composition of the spinel glass-ceramic also satisfies: 12.00 mol% ≤ ZnO + MgO ≤ 20.00 mol%, preferably, 13.00 mol% ≤ ZnO + MgO ≤ 17.30 mol%; and / or, 9.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 22.00 mol%, preferably, 10.00 mol% ≤ Al2O3 - (MgO + ZnO) ≤ 20.00 mol%; and / or, 5.00 mol% ≤ Na2O + Li2O ≤ 15.00 mol%, preferably, 6.00 mol% ≤ Na2O + Li2O ≤ 13.50 mol%.

11. The spinel glass-ceramic according to any one of claims 1 to 10, characterized in that, The spinel glass-ceramic is transparent in the visible light range.

12. The spinel glass ceramic according to any one of claims 1 to 11, characterized in that, The 0.7 mm thick spinel glass-ceramic has a transmittance of greater than or equal to 85% at a light wavelength of 550 nm.

13. The spinel glass ceramic according to any one of claims 1 to 12, characterized in that, In the X-ray diffraction pattern of the spinel glass-ceramic, among the characteristic peaks with a 2θ angle in the range of 28° to 32°, the peak with the maximum peak intensity is the first characteristic peak, and among the characteristic peaks with a 2θ angle in the range of 36° to 38°, the peak with the maximum peak intensity is the second characteristic peak. The peak intensity ratio X of the first characteristic peak and the second characteristic peak is 0.80 to 1.50, preferably the peak intensity ratio X is 0.85 to 1.

30.

14. The spinel glass-ceramic according to any one of claims 1 to 13, characterized in that, In the X-ray diffraction pattern of the spinel glass-ceramic, the characteristic peak of the [400] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 44° to 46°, the characteristic peak of the [311] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 34° to 38°, and the characteristic peak of the [440] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 64° to 67°. The full width at half maximum W of the [400] crystal plane characteristic peak [400] is 0.650° to 1.800°, preferably W [400] is 0.900° to 1.600°; The full width at half maximum W of the [311] crystal plane characteristic peak [311] is 0.900° to 2.800°, preferably W [311] is 1.100° to 2.230°; The full width at half maximum W of the [440] crystal plane characteristic peak [440] is 0.750° to 2.000°, preferably W [440] is from 0.900° to 1.600°.

15. A strengthened spinel glass-ceramic, characterized in that, The strengthened glass-ceramic comprises a compressive stress layer and a tensile stress layer. In terms of molar percentage of oxides, the composition at the center of the strengthened spinel glass-ceramic includes: 35.00 mol% to 60.00 mol% of SiO2, 20.00 mol% to 40.00 mol% of Al2O3, 2.00 mol% to 8.00 mol% of ZrO2, 3.00 mol% to 7.50 mol% of MgO, 7.00 mol% to 13.00 mol% of ZnO, 1.00 mol% to 10.00 mol% of Na2O, and 2.50 mol% to 10.00 mol% of Li2O; The strengthened spinel glass-ceramic contains a (Zn,Mg)Al2O4 crystal phase accounting for 15.00 wt% to 45.00 wt% of the strengthened spinel glass-ceramic; Take W [(Zn，Mg)Al2O4] is the weight percentage of the (Zn, Mg)Al2O4 crystal phase in the strengthened spinel glass-ceramics, W [Al2O3] is the weight percentage of Al2O3 in the strengthened spinel glass-ceramics, W [MgO] is the weight percentage of MgO in the strengthened spinel glass-ceramics, W [ZnO] is the weight percentage of ZnO in the strengthened spinel glass-ceramics; A = (1 - W [(Zn，Mg)Al2O4] / 2) × W [Al2O3] / 2, B = (1 - W [(Zn，Mg)Al2O4] ) × (W [MgO] + W [ZnO] ), C = A / B, and in the strengthened spinel glass-ceramic, 1.50 ≤ C ≤ 1.

85.

16. The strengthened spinel glass-ceramic according to claim 15, wherein, In the strengthened spinel glass-ceramic, the value of A is 10.00% to 25.00%, preferably 14.00% to 25.00%; and / or the value of B is 7.50% to 12.50%, preferably 8.00% to 12.00%; and / or The strengthened spinel glass-ceramic further contains a tetragonal ZrO2 crystal phase, and the total content of the (Zn,Mg)Al2O4 crystal phase and the tetragonal ZrO2 crystal phase accounts for 25.00 wt% to 70.00 wt% of the strengthened spinel glass-ceramic, preferably 30.00 wt% to 50.00 wt% of the strengthened spinel glass-ceramic; and / or In the strengthened spinel glass-ceramic, the ratio of the (Zn,Mg)Al2O4 crystal phase to the tetragonal ZrO2 crystal phase is 1.00 to 18.00, preferably 1.00 to 15.00; and / or In the strengthened spinel glass-ceramic, the average crystal size of the (Zn,Mg)Al2O4 crystal phase is 3.0 nm to 10.0 nm, preferably 4.0 nm to 8.0 nm, more preferably 4.0 nm to 7.5 nm.

17. The strengthened spinel glass-ceramic according to claim 15 or 16, characterized in that, In terms of molar percentage of oxides, the composition at the center of the strengthened spinel glass-ceramic satisfies: 1.30 ≤ ZnO / MgO ≤ 2.50; and / or 0.05 ≤ Li2O / (Al2O3-(MgO+ZnO)+SiO2) ≤ 0.20; and / or 0.19 ≤ (Al2O3-(MgO+ZnO)) / SiO2 ≤ 0.60; and / or 0.26 ≤ Na2O / Li2O ≤ 3.00; and / or 12.00 mol% ≤ ZnO + MgO ≤ 20.00 mol%, preferably, 13.00 mol% ≤ ZnO + MgO ≤ 17.30 mol%; and / or 9.00 mol% ≤ Al2O3-(MgO+ZnO) ≤ 22.00 mol%, preferably, 10.00 mol% ≤ Al2O3-(MgO+ZnO) ≤ 20.00 mol%; and / or 5.00 mol% ≤ Na2O + Li2O ≤ 15.00 mol%, preferably, 6.00 mol% ≤ Na2O + Li2O ≤ 13.50 mol%; and / or, in terms of the molar percentage of oxides, the composition at the center of the strengthened spinel glass-ceramic further includes: K2O 0.00 mol% to 5.00 mol%, CaO 0.00 mol% to 10.00 mol%, B2O3 0.00 mol% to 10.00 mol%, BaO 0.00 mol% to 5.00 mol%.

18. The strengthened spinel glass-ceramic according to any one of claims 15 to 17, characterized in that In the X-ray diffraction pattern of the strengthened spinel glass-ceramic, among the characteristic peaks with 2θ angles in the range of 28° to 32°, the peak with the maximum peak intensity is the first characteristic peak, and among the characteristic peaks with 2θ angles in the range of 36° to 38°, the peak with the maximum peak intensity is the second characteristic peak. The peak intensity ratio X of the first characteristic peak and the second characteristic peak is 0.80 to 1.50, preferably the peak intensity ratio X is 0.85 to 1.30; and / or, In the X-ray diffraction pattern of the strengthened spinel glass-ceramic, the characteristic peak of the [400] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 44° to 46°, the characteristic peak of the [311] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 34° to 38°, and the characteristic peak of the [440] crystal plane of the (Zn, Mg)Al2O4 crystal phase is located at a 2θ angle in the range of 64° to 67°; The full width at half maximum W of the [400] crystal plane characteristic peak [400] is 0.650° to 1.800°, preferably W [400] is 0.900° to 1.600°; The full width at half maximum W of the [311] crystal plane characteristic peak [311] is 0.900° to 2.800°, preferably W [311] is 1.100° to 2.230°; The full width at half maximum W of the [440] crystal plane characteristic peak [440] is 0.750° to 2.000°, preferably W [440] is 0.900° to 1.600°.

19. The strengthened spinel glass ceramic according to any one of claims 15 to 18, characterized in that, The strengthened spinel glass-ceramic is transparent in the visible light range. Preferably, for the strengthened spinel glass-ceramic with a thickness of 0.7 mm, the transmittance at a wavelength of 550 nm is greater than or equal to 85%; and / or, The depth of the compressive stress layer DOL_0 of the strengthened spinel glass-ceramic ≥ 0.21t, preferably, 0.21t ≤ DOL_0 ≤ 0.25t, where t is the thickness of the strengthened spinel glass-ceramic; and / or, The CS_50 of the strengthened spinel glass-ceramic ≥ 100 MPa, preferably, 100 MPa ≤ CS_50 ≤ 250 MPa; and / or, The ∣CT_AV∣ of the strengthened spinel glass-ceramic ≥ 70 MPa, preferably, 70 MPa ≤ ∣CT_AV∣ ≤ 110 MPa; and / or, The ∣CT_CV∣ of the strengthened spinel glass-ceramic ≥ 80 MPa, preferably, 80 MPa ≤ ∣CT_CV∣ ≤ 150 MPa; and / or, The Vickers hardness of the strengthened spinel glass-ceramics is greater than or equal to 790 kgf / mm 2 , preferably 790 kgf / mm 2 to 1000 kgf / mm 2 ; and / or, The fracture toughness of the strengthened spinel glass-ceramic is greater than or equal to 1.00 MPa·m 1 / 2 , preferably greater than or equal to 1.20 MPa·m 1 / 2 .

20. A glass device, which is made of the spinel glass-ceramic according to any one of claims 1 to 14 or the strengthened spinel glass-ceramic according to any one of claims 15 to 19.

21. An electronic device, which includes the spinel glass-ceramic according to any one of claims 1 to 14 or includes the strengthened spinel glass-ceramic according to any one of claims 15 to 19.

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