Optical glass, manufacturing method thereof, glass cover plate and electronic equipment

Abstract

The invention provides optical glass, a manufacturing method thereof, a glass cover plate and electronic equipment, and the optical glass can comprise the following components in percentage by mole: 35%-50% of SiO2, 6%-15% of Y2O3, 21%-30% of MgO, 1%-8% of Al2O3, 2%-7% of Na2O + Li2O, 1%-5% of ZrO2 and 0.5%-1% of Sb2O3. SiO2 serving as a network forming body is a main component for forming the optical glass, Y2O3 serving as an external network body can serve as a high-coordination unit to be coordinated with SiO2 and form a silicon-oxygen network with SiO2, MgO and ZrO2 can fill up space in a network structure, Al2O3, Na2O and Li2O can repair defects in the network structure, the atom stacking density is increased, the structure density is improved, and the optical glass is prepared. Therefore, the elastic modulus and the hardness of the optical glass are increased.

Description

Technical Field

[0001] This application relates to the technical field of glass, and particularly relates to an optical glass, a manufacturing method thereof, a glass cover plate and an electronic device. Background Art

[0002] Optical glass has excellent optical, chemical and processability properties and has been widely used in mobile electronic consumer products represented by mobile phones. However, due to the high brittleness of optical glass and low resistance to crack propagation, the tiny cracks introduced during the preparation, processing and use are likely to rapidly expand under the action of external forces, eventually leading to fracture failure. Therefore, electronic products with optical glass are prone to breakage in scenarios such as collision and dropping, resulting in damage to the appearance, degradation or even loss of working performance, bringing losses to consumers and reducing the user experience. Then, it is very important to improve the elastic modulus and hardness of optical glass. Summary of the Invention

[0003] This application provides an optical glass, a manufacturing method thereof, a glass cover plate and an electronic device, which are used to improve the elastic modulus and hardness of the optical glass.

[0004] In a first aspect, an embodiment of this application provides an optical glass. In terms of the molar percentage of oxides, the optical glass may include: SiO2: 35% - 50%, Y2O3: 6% - 15%, MgO: 21% - 30%, Al2O3: 1% - 8%, Na2O + Li2O: 2% - 7%, Na2O: ≥0, Li2O: ≥0, ZrO2: 1% - 5%, Sb2O3: 0.5% - 1%.

[0005] Among the above components included in the optical glass, SiO2, as a network former, is the main component for forming the optical glass. SiO2 can form a silicon-oxygen network in the optical glass, endowing the optical glass with good chemical stability, thermal stability, and good transparency. Y2O3, as a network modifier, has a large ionic radius and a high coordination number. Therefore, it can form high-coordination units in the optical glass to fill the voids in the silicon-oxygen network and bond with SiO2 to form a three-dimensional framework, that is, to form the network structure of the optical glass. When Y2O3 and SiO2 bond, due to the relatively high coordination number of Y2O3 (such as eight coordination), different bonding angles will lead to relatively large pores in the network structure. MgO, as a network modifier and with the ionic radius of Mg ions smaller than that of Y ions, can enter these pores and bond with SiO2, increasing the atomic packing density and improving the density of the structure. This indicates that there is a good synergistic effect among Y2O3, SiO2, and MgO. It should be noted that precisely because of the synergistic effect among Y2O3, SiO2, and MgO, even if the content of MgO is increased, but if the content of Y2O3 is decreased, this synergistic effect will not exist, and it will still be difficult for the optical glass to have a high elastic modulus. Vice versa, only when the contents of both MgO and Y2O3 are relatively high can a good synergistic effect be achieved, enabling the optical glass to have a high elastic modulus. ZrO2 has only one coordination form, namely cubic, in the network structure. Due to the relatively large ionic radius of Zr ions, the introduction of ZrO2 can significantly increase the viscosity of the optical glass. The network modifiers with three different ionic radii of Y ions, Mg ions, and Zr ions cooperate to fill the silicon-oxygen network structure, which can greatly increase the packing density of the optical glass, thereby obtaining an optical glass with high modulus and high hardness. Al2O3, as a network intermediate, can repair the defects in the silicon-oxygen network and further increase the atomic packing density in the silicon-oxygen network, thus improving the elastic modulus and hardness of the optical glass. Na2O and Li2O, as network modifiers, can act as fluxes due to the relatively small ionic radii and large polarities of Na ions and Li ions. Sb2O3 can be used as a fining agent to eliminate bubbles during the formation of the optical glass, improve the light transmittance of the optical glass, and enhance the optical properties of the optical glass.

[0006] Thus, the optical glass provided by the embodiment of the present application can effectively improve the elastic modulus and hardness of the optical glass through the interaction and synergistic effect among various components. For example, the elastic modulus of the optical glass can reach 105 GPa to 147 GPa, the Vickers hardness of the optical glass can reach 700 Kgf / mm 2 ~850 Kgf / mm 2 , and the light transmittance of the optical glass can reach 82% to 90.5%, effectively improving the performance of the optical glass.

[0007] Optionally, in terms of the molar percentage of oxides, the optical glass may further include: SiO2: 40% - 50%, Y2O3: 6% - 12%, MgO: 23% - 27%, Al2O3: 3% - 6%, Na2O + Li2O: 5% - 7%, ZrO2: 1% - 3%, Sb2O3: 0.5% - 1%. Thus, by adjusting the molar percentages of various components, the elastic modulus and hardness of the optical glass can be further improved, and other properties of the optical glass, such as but not limited to chemical stability, thermal stability, and optical properties, can also be improved.

[0008] Optionally, in terms of the molar percentage of oxides, Y2O3 + MgO can be set to 30% - 40%, such as but not limited to 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40% and other values; among them, if the value of Y2O3 + MgO is too small, it will be difficult for the optical glass to obtain a high elastic modulus and high hardness, and if the value of Y2O3 + MgO is too high, the possibility of crystallization will increase. Since the optical glass is an amorphous substance, the appearance of crystallization will hinder the formation of the optical glass. Therefore, setting the value of Y2O3 + MgO within a suitable range can not only ensure the formation of the optical glass, but also enable the optical glass to have a high elastic modulus and high hardness. Further, in terms of the molar percentage of oxides, Y2O3 + MgO can be set to 30% - 35% to further promote the formation of the optical glass and further improve the elastic modulus and hardness of the optical glass.

[0009] Optionally, in terms of the molar percentage of oxides, (Y2O3 + MgO) / SiO2 can be set to 0.6 - 1, such as but not limited to 0.6, 0.7, 0.8, 0.9, 1 and other values; among them, if the value of (Y2O3 + MgO) / SiO2 is too small, the probability of crystallization will increase, and if the value of (Y2O3 + MgO) / SiO2 is too high, the amount of SiO2 will be too low. Since SiO2 is the main component for forming the optical glass, too low an amount of SiO2 will make it difficult to form the optical glass. Therefore, setting the value of (Y2O3 + MgO) / SiO2 within a suitable range can not only avoid the risk of crystallization, but also promote the formation of the optical glass. Further, (Y2O3 + MgO) / SiO2 can also be set to 0.6 - 0.8 to further promote the formation of the optical glass.

[0010] Optionally, the optical glass may further include less than or equal to 8% TiO2, measured as a molar percentage of oxides, such as, but not limited to, 0, 1, 2, 3, 4, 5, 6, 7, 8, or other values. TiO2 functions similarly to Al2O3, Na2O, and Li2O, serving as a network intermediate to repair defects in the silicon-oxygen network, further increasing the atomic packing density within the silicon-oxygen network and further improving the structural density of the optical glass, thereby further increasing the elastic modulus and hardness of the optical glass. Furthermore, the TiO2 content, measured as a molar percentage of oxides, may be set to 0-5%, further increasing the elastic modulus and hardness of the optical glass.

[0011] Optionally, the optical glass further includes less than or equal to 5% La2O3, such as but not limited to other values such as 0, 1%, 2%, 3%, 4%, 5%, etc., in terms of molar percentage of oxides; the role of La2O3 is similar to that of ZrO2, and the coordination number of La2O3 is relatively low (such as two or four coordination), so La2O3 can enter the space corresponding to the larger bonding angle to fill the space, thereby further increasing the packing density of atoms, further increasing the density of the structure, and further increasing the elastic modulus and hardness of the optical glass.

[0012] It's worth noting that when increasing the elastic modulus and hardness of optical glass, because optical glass is formed from a high-coordination network containing multiple ligands, increasing the density of the structure can improve the elastic modulus and hardness of the optical glass. Furthermore, the coordination numbers of components such as TiO2, Al2O3, Na2O, Li2O, La2O3, and ZrO2 may vary. Therefore, by adding components with different coordination numbers to the optical glass, spaces or defects of varying sizes can be compensated, maximizing the density of the structure and thus increasing the elastic modulus and hardness of the optical glass.

[0013] In a second aspect, embodiments of the present application further provide a method for producing optical glass, which is used to produce the optical glass described in the first aspect and any of the embodiments thereof. The method may include pouring molten glass into a mold and annealing it to produce the optical glass. In this manner, the optical glass can be produced through melt cooling, which not only imparts a higher elastic modulus and hardness to the optical glass but also reduces the difficulty and cost of production.

[0014] It should be understood that since the principle of solving the problem of the optical glass produced by this production method is similar to the principle of solving the problem of the aforementioned optical glass, the implementation and technical effects of this production method can refer to the implementation and technical effects of the aforementioned optical glass, and the repeated parts will not be repeated.

[0015] In a third aspect, an embodiment of the present application further provides a glass cover plate, which may include: the optical glass described in the first aspect and any one of the embodiments in the first aspect, and a functional film layer attached to the surface of the optical glass. In this way, on the basis that the optical glass has a high elastic modulus and hardness, the glass cover plate can also have a high elastic modulus and hardness.

[0016] It should be understood that since the principle of solving problems by this glass cover plate is similar to that of the foregoing optical glass, the implementation and technical effects of this glass cover plate can refer to the implementation and technical effects of the foregoing optical glass, and the repeated parts will not be elaborated.

[0017] In a fourth aspect, an embodiment of the present application further provides an electronic device, which may include: the glass cover plate described in the first aspect and any one of the embodiments in the first aspect. On the basis that the glass cover plate has a high elastic modulus and hardness, the electronic device has high reliability.

[0018] It should be understood that since the principle of solving problems by this electronic device is similar to that of the foregoing glass cover plate, the implementation and technical effects of this electronic device can refer to the implementation and technical effects of the foregoing glass cover plate, and the repeated parts will not be elaborated. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the electronic device provided by the embodiment of the present application. Detailed Embodiments

[0020] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0021] It should be noted that the same reference numerals in the drawings of the present application represent the same or similar structures, so the repeated description thereof will be omitted. The words expressing positions and directions described in the present application are all illustrated with reference to the drawings, but can be changed according to needs, and the changes made are all within the protection scope of the present application. The drawings of the present application are only used to illustrate the relative positional relationship and do not represent the true proportion.

[0022] To facilitate the understanding of the technical solutions provided by the embodiments of the present application, the application scenarios are first described below.

[0023] The technical solutions provided by the embodiments of the present application can be widely applied to various electronic devices. The electronic devices provided by the embodiments of the present application may include various terminal devices. Among them, the terminal devices may include, but are not limited to: smart phones, smart TVs, smart TV set-top boxes, smart watches, personal computers (PCs), wearable devices, smart broadband, etc., and will not be listed one by one here. Of course, the technical solutions provided by the embodiments of the present application can also be widely applied in the construction field, such as glass curtain walls or glass structural members, etc.

[0024] Taking the application in electronic devices as an example, Figure 1 An exemplary structural schematic diagram of an electronic device is shown. Referring to Figure 1 As shown, the electronic device includes: a housing 100 and a display 200. The housing 100 is used to fix the display 200. The display 200 includes a display component 210 and a glass cover plate 220. The glass cover plate 220 covers the display component 210 to prevent the outside from damaging the display component 210 and can play a protective role for the display component 210. Through the glass cover plate 220, the picture displayed by the display component 210 can also be transmitted for the user to view. Among them, the glass cover plate 220 can be made of optical glass. Optical glass has excellent optical, chemical and processability properties. The produced glass cover plate 220 has been widely used in mobile electronic consumer products represented by mobile phones. However, due to the high brittleness of optical glass and low resistance to crack propagation, the micro-cracks introduced during the preparation, processing and use are likely to rapidly expand under the action of external forces, ultimately resulting in fracture failure. Therefore, electronic products with the glass cover plate 220 are prone to breakage in scenarios such as collision and dropping, resulting in damage to the appearance, decline or even loss of working performance, bringing losses to consumers and reducing the user experience. Therefore, it is crucial to increase the elastic modulus and hardness of optical glass to improve the ability of optical glass to resist deformation.

[0025] Based on this, the embodiments of the present application provide an optical glass for increasing the elastic modulus and hardness of optical glass. Among them, in terms of the molar percentage of oxides, the optical glass may include: SiO2: 35% - 50%, Y2O3: 6% - 15%, MgO: 21% - 30%, Al2O3: 1% - 8%, Na2O+Li2O: 2% - 7%, Na2O: ≥0, Li2O: ≥0, ZrO2: 1% - 5%, Sb2O3: 0.5% - 1%.

[0026] According to the single bond force size of the cation and oxygen ion bond, the oxides forming the optical glass can be divided into three categories: network formers, glass former oxides that can independently form a network; network intermediates, intermediate oxides that can enter the network under certain conditions; network modifiers, network modifier oxides that break the network.

[0027] Optical glass with SiO2 as the main component is also called fused silica glass, which consists of a three-dimensional random framework network composed of silicon-oxygen tetrahedra [SiO4]. Therefore, SiO2, as the network former in optical glass, endows the optical glass with good chemical stability, thermal stability, good transparency, high softening temperature, high hardness and high mechanical strength. Of course, as the main network former, if the content of SiO2 is too low, it is not conducive to the formation of optical glass. Therefore, the molar percentage of SiO2 is set to 35% - 50%, and further, the molar percentage of SiO2 is set to 40% - 50%.

[0028] As a network modifier, due to the large radius and high coordination number of Y ions, Y2O3 can form high-coordination units in optical glass to fill the voids in the silicon-oxygen network and bond with SiO2 to form a three-dimensional framework, that is, to form the network structure of optical glass, so as to improve the aggregation degree of the network structure, enhance the hardness and elastic modulus of the optical glass, and improve the optical properties of the optical glass. Therefore, the molar percentage of Y2O3 is set to 6% - 15%, and further, the molar percentage of Y2O3 is set to 6% - 12%.

[0029] As a network modifier, when Y2O3 and SiO2 bond, due to the relatively high coordination number of Y2O3 (such as eight coordination) and different bonding angles leading to relatively large pores in the network structure, MgO can enter these pores and bond with SiO2 to increase the atomic packing density and the density of the structure, thereby increasing the elastic modulus and hardness of the optical glass. Moreover, if the content of MgO is too low, the elastic modulus of the optical glass will be greatly reduced. In other words, if the content of MgO is too low, it will be difficult for the optical glass to have a high elastic modulus. Increasing the content of MgO will enable the optical glass to have a high elastic modulus. Therefore, the molar percentage of MgO can be set to 21% - 30%, and further, the molar percentage of MgO is set to 23% - 27% to make the network structure of the optical glass more dense and the elastic modulus higher. And because of the synergistic effect among Y2O3, SiO2 and MgO, even if the content of MgO is increased, but if the content of Y2O3 is reduced, this synergistic effect does not exist, and it will still be difficult for the optical glass to have a high elastic modulus, and vice versa. Only when the contents of both MgO and Y2O3 are relatively high can a good synergistic effect be achieved, making the optical glass have a high elastic modulus.

[0030] When bonding occurs among Y2O3, SiO2, and MgO, the introduction of ZrO2 can play a role in further strengthening. Due to the relatively large ionic radius of Zr ions, the introduction of ZrO2 can significantly increase the viscosity of the optical glass and appropriately reduce the thermal expansion coefficient of the optical glass. However, the solubility of ZrO2 in the optical glass is relatively small. If the content of ZrO2 is too high, it may form stones, resulting in a decrease in the optical properties of the optical glass. Therefore, the molar percentage of ZrO2 can be set to 1% - 5%, and further, the molar percentage of ZrO2 can be set to 1% - 3%.

[0031] Al2O3 can act as a network intermediate to repair defects in the silicon-oxygen network, further increase the packing density of atoms in the silicon-oxygen network, further improve the structural density of the optical glass, and thus further increase the elastic modulus and hardness of the optical glass. Moreover, Al2O3 can also improve the chemical stability of the optical glass and reduce the risk of crystallization. However, if the content of Al2O3 is too high, it will rapidly increase the high-temperature viscosity of the optical glass and increase the melting difficulty of the optical glass. Therefore, the molar percentage of Al2O3 can be set to 1% - 8%, and further, the molar percentage of Al2O3 can be set to 3% - 6%.

[0032] Na2O and Li2O, as network modifiers, can be filled in the network structure of the optical glass. Moreover, Na2O and Li2O can also act as fluxes. As strong polar elements, Na and Li can significantly reduce the melting temperature of the optical glass, thereby reducing the manufacturing difficulty of the optical glass. Due to their large polarity and small ionic radius, they are prone to causing crystallization and network breakage, which have a negative impact on the improvement of the elastic modulus and hardness. Therefore, the main function of Na2O and Li2O is to enable the optical glass to be chemically strengthened to further enhance the hardness of the optical glass, and the molar percentage of Na2O + Li2O can be set to 2% - 7%, and further, the molar percentage of Na2O + Li2O can be set to 5% - 7%.

[0033] Sb2O3 can act as a fining agent to eliminate bubbles during the formation of the optical glass, improve the light transmittance of the optical glass, and improve the optical properties of the optical glass. Moreover, if the content of Sb2O3 is too high, it is easy to remain in the optical glass. Therefore, the molar percentage of Sb2O3 can be set to 0.5% - 1%.

[0034] Thus, the optical glass provided by the embodiment of the present application can effectively improve the elastic modulus and hardness of the optical glass through the interaction and synergy among various components. For example, the elastic modulus of the optical glass can reach 105 GPa - 147 GPa, and the Vickers hardness of the optical glass can reach 700 Kgf / mm 2 ~850 Kgf / mm 2, the transmittance of the optical glass can reach 82% - 90.5%, effectively improving the performance of the optical glass.

[0035] Optionally, in terms of the molar percentage of oxides, Y2O3 + MgO can be set to 30% - 40%, such as but not limited to 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40% and other values; among them, if the value of Y2O3 + MgO is too small, it will be difficult for the optical glass to obtain a high elastic modulus and high hardness, and if the value of Y2O3 + MgO is too high, the possibility of crystallization will increase. Since the optical glass is an amorphous substance, the appearance of crystallization will hinder the formation of the optical glass. Therefore, setting the value of Y2O3 + MgO within a suitable range can not only ensure the formation of the optical glass, but also make the optical glass have a high elastic modulus and high hardness. Further, in terms of the molar percentage of oxides, Y2O3 + MgO can be set to 30% - 35% to further promote the formation of the optical glass, as well as further improve the elastic modulus and hardness of the optical glass.

[0036] Optionally, in terms of the molar percentage of oxides, (Y2O3 + MgO) / SiO2 can be set to 0.6 - 1, such as but not limited to 0.6, 0.7, 0.8, 0.9, 1 and other values; among them, if the value of (Y2O3 + MgO) / SiO2 is too small, the probability of crystallization will increase, and if the value of (Y2O3 + MgO) / SiO2 is too high, the amount of SiO2 will be too low. Since SiO2 is the main component for forming the optical glass, if the amount of SiO2 is too low, it will be difficult to form the optical glass. Therefore, setting the value of (Y2O3 + MgO) / SiO2 within a suitable range can not only avoid the risk of crystallization, but also promote the formation of the optical glass. Further, (Y2O3 + MgO) / SiO2 can also be set to 0.6 - 0.8 to further promote the formation of the optical glass.

[0037] Optionally, in terms of the molar percentage of oxides, the optical glass may further include TiO2 less than or equal to 8%, such as but not limited to 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8% and other values. The function of TiO2 is similar to that of Al2O3, Na2O, and Li2O. TiO2 has a relatively low coordination number and can exist in the silicon-oxygen network as a network intermediate in the form of four coordination to repair the defects in the silicon-oxygen network, further increasing the packing density of atoms in the silicon-oxygen network and further improving the structural density of the optical glass, thereby further increasing the elastic modulus and hardness of the optical glass. And TiO2 can also exist outside the silicon-oxygen network in the form of eight coordination to improve the optical properties and chemical stability of the optical glass. However, too high a content of TiO2 is likely to cause devitrification of the optical glass, so the molar percentage of TiO2 can be set to 0-8%, and further set to 0-5% to further increase the elastic modulus, hardness, and optical properties of the optical glass.

[0038] Optionally, in terms of the molar percentage of oxides, the optical glass may further include La2O3 less than or equal to 5%, such as but not limited to 0, 1%, 2%, 3%, 4%, 5% and other values. The function of La2O3 is similar to that of ZrO2. La2O3 has a relatively low coordination number (such as two or four coordination), so La2O3 can enter the space corresponding to a larger bond angle to fill the space, thereby further increasing the packing density of atoms, further increasing the density of the structure, and further increasing the elastic modulus and hardness of the optical glass.

[0039] It should be noted that when improving the elastic modulus and hardness of the optical glass, since the optical glass is formed by a high-coordination network and contains multi-ligands, the elastic modulus and hardness of the optical glass can be improved by increasing the density of the structure. Moreover, the coordination numbers of these components such as TiO2, Al2O3, Na2O, Li2O, La2O3, and ZrO2 may be different. Therefore, by adding components with different coordination numbers to the optical glass, different sizes of spaces or defects in the structure can be supplemented, and the density of the structure can be increased as much as possible, thereby increasing the elastic modulus and hardness of the optical glass.

[0040] Based on this, further, the embodiment of the present application also provides a method for manufacturing an optical glass, which may include: weighing and mixing the raw materials according to the above-mentioned molar percentages, and performing high-temperature treatment on the mixed raw materials to obtain a glass melt; pouring the glass melt into a mold for annealing to obtain an optical glass. In this way, the optical glass can be manufactured by the method of melting and cooling, which can not only make the optical glass have a high elastic modulus and hardness, but also reduce the manufacturing difficulty and cost.

[0041] Among them, the raw materials corresponding to each component in the optical glass can be introduced in the form of oxides, carbonates, hydroxides, nitrates, etc. For example, Na2O and Li2O can be introduced into the raw materials in the form of nitrates, that is, lithium nitrate and sodium nitrate are used as raw materials and used in combination with Sb2O3. In this way, since nitrate ions have a promoting effect on the discharge of bubbles and have a defoaming effect, when used in combination with Sb2O3, bubbles can be eliminated during the formation of the optical glass, the light transmittance of the optical glass can be improved, and the optical properties of the optical glass can be improved.

[0042] Moreover, when the mixed raw materials are subjected to high-temperature treatment, the mixed raw materials can be placed in a high-temperature furnace for high-temperature treatment, and the high-temperature treatment process can be carried out in stages to gradually increase the treatment temperature so that various raw materials can be melted, thereby obtaining a glass melt. Of course, the temperature of the high-temperature treatment and the temperature during the annealing treatment can be designed according to actual needs and are not specifically limited herein.

[0043] Next, the performance of the optical glass is tested.

[0044] The density test can be carried out by the Archimedes drainage method.

[0045] The elastic modulus test can be carried out by the nanoindentation method.

[0046] The Vickers hardness test can be carried out by the indentation method, and the load can be 200 g.

[0047] The transmittance test can be carried out by an ultraviolet-visible spectrophotometer, and the transmittance at a wavelength of 500 nm is selected for analysis.

[0048] In Examples 1 to 8 and Comparative Examples 1 to 4, the molar percentages of the components included in the optical glass are as shown in Table 1 below. In Table 1, in each example and each comparative example, the sum of the molar percentages of various components is 100%; the performance test results of the optical glass in each example and each comparative example are as shown in Table 2 below.

[0049] Table 1

[0050] <![CDATA[SiO2]]> <![CDATA[Y2O3]]> MgO <![CDATA[Al2O3]]> <![CDATA[Li2O]]> <![CDATA[Na2O]]> <![CDATA[TiO2]]> <![CDATA[ZrO2]]> <![CDATA[La2O3]]> <![CDATA[Sb2O3]]> Example 1 45％ 10％ 25％ 6％ 2％ 0 7％ 1.5％ 3％ 0.5％ Example 2 40％ 15％ 25％ 6％ 2％ 0 7％ 1.5％ 3％ 0.5％ Example 3 45％ 10％ 30％ 6％ 4％ 0 0 1.5％ 3％ 0.5％ Example 4 45％ 10％ 25％ 6％ 0 2％ 7％ 1.5％ 3％ 0.5％ Example 5 45％ 10％ 25％ 6％ 4％ 2％ 3％ 1.5％ 3％ 0.5％ Example 6 45％ 10％ 25％ 6％ 2％ 0 5％ 1.5％ 5％ 0.5％ Example 7 45％ 10％ 25％ 6％ 2％ 5％ 0 1.5％ 5％ 0.5％ Example 8 45％ 10％ 25％ 8％ 2％ 0 5％ 1.5％ 5％ 0.5％ Comparative Example 1 65％ 10％ 5％ 6％ 2％ 0 7％ 1.5％ 3％ 0.5％ Comparative Example 2 70％ 10％ 0 6％ 2％ 0 7％ 1.5％ 3％ 0.5％ Comparative Example 3 45％ 0 25％ 6％ 2％ 0 7％ 1.5％ 3％ 0.5％ Comparative Example 4 52.5％ 2.5％ 25％ 6％ 2％ 0 7％ 1.5％ 3％ 0.5％

[0051] Table 2

[0052]

[0053] It can be found from the results shown in Table 1 and Table 2 above:

[0054] 1. For Examples 1 to 8, the elastic modulus of the optical glass is generally about 130 GPa, and the Vickers hardness of the optical glass is 800 Kgf / mm 2or so; for Comparative Examples 1 to 4, the highest elastic modulus of the optical glass is 108 GPa, and the highest Vickers hardness of the optical glass is 738 Kgf / mm 2 or so. Therefore, compared with the comparative examples, the elastic modulus and Vickers hardness of the optical glass are significantly increased. The reason is that: in Examples 1 to 8, the molar percentage content of SiO2 is 40%-50%, the molar percentage content of Y2O3 is 10%-15%, and the molar percentage content of MgO is 21%-30%; in Comparative Examples 1 and 2, the molar percentage content of MgO is 0 or 5%. Therefore, compared with the examples, the molar percentage content of at least one of MgO and Y2O3 is less. This shows that it is difficult to form an effective synergistic effect when the content of one of the components of MgO and Y2O3 is less. When the molar percentage contents of MgO and Y2O3 are both relatively high, an effective synergistic effect is generated among MgO, Y2O3, and SiO2, thereby effectively improving the elastic modulus and Vickers hardness of the optical glass.

[0055] 2. For Example 2, when the molar percentage content of SiO2 is 40%, the molar percentage content of Y2O3 is 15%, the molar percentage content of MgO is 25%, the molar percentage content of Al2O3 is 40%, the molar percentage content of Li2O is 15%, the molar percentage content of TiO2 is 15%, the molar percentage content of ZrO2 is 15%, and the molar percentage content of La2O3 is 15%, and the molar percentage content of Sb2O3 is 15%, the elastic modulus of the optical glass is about 147 GPa, and the Vickers hardness is about 856 Kgf / mm 2 , making the optical glass exhibit very excellent mechanical properties; and the density of Example 2 is about 3.44 g / cm 3 , indicating that the optical glass has very good density, and from this perspective, it can also be shown that the optical glass has very good mechanical properties. This shows that under the ratio of each component in Example 2, there is a good synergistic effect among MgO, Y2O3, SiO2, and ZrO2. Under this synergistic effect, the mechanical properties of the optical glass can be effectively improved.

[0056] 3. By comparing Comparative Example 2, Comparative Example 3, and Example 2, it can be found that: when either MgO or Y2O3 is missing, the elastic modulus and Vickers hardness of the optical glass will be relatively low. This shows that when either MgO or Y2O3 is missing, no synergistic effect can be formed. Only when the contents of both MgO and Y2O3 are relatively high can a better synergistic effect be achieved, making the optical glass have a relatively high elastic modulus.

[0057] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. An optical glass, characterized in that, In terms of molar percentage of oxides, the optical glass comprises: SiO2: 35% - 50%, Y2O3: 6% - 15%, MgO: 21% - 30%, Al2O3: 1% - 8%, Na2O + Li2O: 2% - 7%, wherein Na2O ≥ 0, Li2O ≥ 0, ZrO2: 1% - 5%, Sb2O3: 0.5% - 1%.

2. The optical glass according to claim 1, characterized in that, In terms of molar percentage of oxides, the optical glass comprises: SiO2: 40% - 50%, Y2O3: 6% - 12%, MgO: 23% - 27%, Al2O3: 3% - 6%, Na2O + Li2O: 5% - 7%, ZrO2: 1% - 3%, Sb2O3: 0.5% - 1%.

3. The optical glass according to claim 1 or 2, characterized in that, In terms of molar percentage of oxides, Y2O3 + MgO: 30% - 40%.

4. The optical glass according to claim 3, wherein In terms of molar percentage of oxides, Y2O3 + MgO: 30% - 35%.

5. The optical glass according to any one of claims 1-4, characterized in that, In terms of molar percentage of oxides, (Y2O3 + MgO) / SiO2: 0.6 - 1.

6. The optical glass according to claim 5, characterized in that, In terms of molar percentage of oxides, (Y2O3 + MgO) / SiO2: 0.6 - 0.

8.

7. The optical glass according to any one of claims 1-6, characterized in that, In terms of molar percentage of oxides, the optical glass further comprises TiO2 less than or equal to 8%.

8. The optical glass according to claim 7, characterized in that, In terms of molar percentage of oxides, TiO2: 0 - 5%.

9. The optical glass according to any one of claims 1-8, characterized in that, In terms of molar percentage of oxides, the optical glass further comprises La2O3 less than or equal to 5%.

10. The optical glass according to any one of claims 1-9, characterized in that, The elastic modulus of the optical glass is 105 GPa - 147 GPa.

11. The optical glass according to any one of claims 1 to 10, characterized in that, The Vickers hardness of the optical glass is 700 Kgf / mm 2 ~850 Kgf / mm 2 .

12. A method for manufacturing an optical glass as described in any one of claims 1-11, characterized in that, Comprises: Pouring the glass liquid into a mold for annealing to obtain the optical glass.

13. A glass cover plate, characterized in that, Comprises: The optical glass according to any one of claims 1 - 11, and a functional film layer, wherein the functional film layer is attached to the surface of the optical glass.

14. An electronic device, characterized in that, Comprises the glass cover plate according to claim 13.

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