CN116903248A - Composition for preparing high-alumina glass, preparation method and application thereof - Google Patents
Composition for preparing high-alumina glass, preparation method and application thereof Download PDFInfo
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- CN116903248A CN116903248A CN202310974475.XA CN202310974475A CN116903248A CN 116903248 A CN116903248 A CN 116903248A CN 202310974475 A CN202310974475 A CN 202310974475A CN 116903248 A CN116903248 A CN 116903248A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The application provides a composition for preparing high-alumina glass, the high-alumina glass, a preparation method and application thereof, and relates to the technical field of glass. The application provides a composition for preparing high-alumina glass, which comprises the following components in percentage by mass: 58-67% SiO 2 14 to 23 percent of Al 2 O 3 10 to 25 percent of Na 2 O, 3 to 7 percent of MgO and 0.1 to 0.5 percent of ZrO 2 And 0.1 to 0.5% TiO 2 . The application also provides a preparation method of the high-alumina glass, which improves the efficiency of ion exchange by means of an external electric field; meanwhile, a certain electric field, a certain magnetic field and a certain ultrasonic wave are applied to perform chemical strengthening to form a stress layer, so that the tempering efficiency of the glass can be greatly improved.
Description
Technical Field
The application relates to the technical field of glass, in particular to a composition for preparing high-alumina glass, the high-alumina glass, a preparation method and application thereof.
Background
Along with the rapid development of the electronic display industry, the application fields of electronic glass such as electronic display substrates, cover plates, light guide plates and the like and intelligent glass are wider and wider, and the requirements of users on the product performance are also higher and higher. Chemical strengthening is one of the important ways to improve glass properties, by which mechanical strength, abrasion resistance, thermal stability and chemical stability of the glass can be improved, and brittleness of the glass surface can be reduced. However, at present, the chemical strengthening of cover glass needs to be in a high-temperature large-particle-diameter salt solution for a long time in the ion exchange process, so that the position of the cover glass is transformed with small-particle-diameter ions in the glass in a disordered state, and meanwhile, after the ion exchange, the ultrathin cover glass is easy to deform or warp in the ion exchange process.
The cover plate glass is an important component of the display panel of the electronic product, plays a role in supporting and protecting the display panel, has lower passing rate of the ball falling impact experiment of the prior common sodium-calcium-silicon glass at high energy, has weaker impact resistance in the use of the tablet personal computer, can not meet the requirement of the modern society on the impact resistance of the screen of the tablet personal computer,
disclosure of Invention
In order to solve the technical problem that sodium-calcium-silicon glass has weaker impact resistance in the prior art, one of the purposes of the application is to provide a composition for preparing high-alumina glass, and the composition can be used for preparing high-alumina glass resistant to high-energy impact.
The second purpose of the application is to provide a preparation method of high alumina glass, which can improve the efficiency of ion exchange by means of an external electric field; meanwhile, a stress layer is formed by chemical strengthening through applying a certain electric field, a certain magnetic field and a certain ultrasonic wave, so that the toughening efficiency of the glass can be greatly improved.
The application also aims to provide the high-alumina glass prepared by the preparation method, which has higher shock resistance, lower static voltage of a tearing film, high surface compressive stress, deep stress layer depth and higher tempering efficiency.
The fourth object of the present application is to provide an application of the composition or the high alumina glass in the field of electronic display panel materials.
In order to achieve one of the above purposes, the present application adopts the following technical scheme:
a composition for preparing high alumina glass comprising, in mass percent:
58-67% SiO 2 14 to 23 percent of Al 2 O 3 10 to 25 percent of Na 2 O, 3 to 7 percent of MgO and 0.1 to 0.5 percent of ZrO 2 And 0.1 to 0.5% TiO 2 。
In the above composition, siO 2 Is made of [ SiO ] 4 ]Forming a skeleton of a glass structure, [ SiO ] 4 ]The molar volume is small, the structure is compact, the ion exchange capacity is weak, other small-particle-size components are required to be added into the glass, and the surface compressive stress and the stress layer depth after ion reinforcement are increased. Al (Al) 3+ With aluminiumOxygen tetrahedra [ AlO ] 4 ]In the form of (2) with Al 2 O 3 /SiO 2 The number of non-bridging oxygens in the glass network is reduced, so that the network structure of the glass is more compact and complete, and the density of the glass is along with Al 2 O 3 /SiO 2 Increases with the increase of the glass, and increases the flexural strength of the glass, and the thermal expansion coefficient of the glass is as that of Al 2 O 3 The content increases and decreases. Higher content of Al 2 O 3 Can greatly improve the chemical stability of the glass, improve the crystallization temperature of the glass, reduce the crystallization tendency of the glass, and improve the hardness and the mechanical strength, thereby ensuring that the prepared glass has excellent mechanical properties. MgO can increase the compressive stress after strengthening, but can reduce the depth of the stress layer, so that the mass fraction of MgO is controlled within 5-6%.
In order to achieve the second purpose, the application adopts the following technical scheme:
the preparation method of the high-alumina glass comprises the following steps:
s1, carrying out contact mixing on the components in the composition, and sequentially carrying out melting and clarification treatment on the obtained mixed material under the condition of stirring and homogenization to obtain molten glass;
s2, sequentially forming, annealing and preserving the molten glass in the step S1 to obtain a glass sample block;
s3, under the auxiliary condition of an electric field, placing the glass sample block in the step S2 into pure KNO 3 Soaking in molten salt to obtain the high-alumina glass.
According to the preparation method, the movement speed of Na and K ions in the high-temperature molten salt is increased in a mode of externally applying an electric field, and meanwhile, li and Na ions in the glass are enabled to leave the vicinity of the glass at a higher speed after being exchanged with Na and K ions in the high-temperature molten salt, so that Na and K ions in the high-temperature molten salt can be accelerated to continue to carry out an ion exchange process with the glass; meanwhile, a certain electric field, a certain magnetic field and a certain ultrasonic wave are applied to perform chemical strengthening to form a stress layer, so that the tempering efficiency of glass can be greatly improved, and the electrostatic voltage of a chemically tempered stress layer film tearing film is lower than 500V.
In order to achieve the third purpose, the application adopts the following technical scheme:
the high alumina glass prepared by the preparation method. The glass has higher shock resistance, lower static voltage of a tearing film, high surface compressive stress, deep stress layer depth and higher toughening efficiency.
In order to achieve the fourth purpose, the application adopts the following technical scheme:
use of a composition as defined in any one of the above or a high alumina glass as defined above in the field of electronic display panel materials.
Compared with the prior art, the embodiment of the application has at least the following advantages or beneficial effects:
1. the preparation method of the high-alumina glass provided by the application is simple to operate, does not need special equipment, and has production conditions in a common laboratory.
2. According to the preparation method, the movement speed of Na and K ions in the high-temperature molten salt is increased in a mode of externally applying an electric field, and meanwhile, li and Na ions in the glass are enabled to leave the vicinity of the glass at a higher speed after being exchanged with Na and K ions in the high-temperature molten salt, so that Na and K ions in the high-temperature molten salt can be accelerated to continue to carry out an ion exchange process with the glass; meanwhile, a certain electric field, a certain magnetic field and a certain ultrasonic wave are applied to perform chemical strengthening to form a stress layer, so that the tempering efficiency of glass can be greatly improved, and the electrostatic voltage of a chemically tempered stress layer film tearing film is lower than 500V.
3. The high-alumina glass provided by the application has higher shock resistance, lower film tearing static voltage, high surface compressive stress, deep stress layer depth and higher tempering efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below.
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
A composition for preparing high alumina glass comprising, in mass percent:
58-67% SiO 2 14 to 23 percent of Al 2 O 3 10 to 25 percent of Na 2 O, 3 to 7 percent of MgO and 0.1 to 0.5 percent of ZrO 2 And 0.1 to 0.5% TiO 2 。
In the above composition, siO 2 Is made of [ SiO ] 4 ]Forming a skeleton of a glass structure, [ SiO ] 4 ]The molar volume is small, the structure is compact, the ion exchange capacity is weak, other small-particle-size components are required to be added into the glass, and the surface compressive stress and the stress layer depth after ion reinforcement are increased.
Al 3+ With aluminium oxide tetrahedra [ AlO ] 4 ]In the form of (2) with Al 2 O 3 /SiO 2 The number of non-bridging oxygens in the glass network is reduced, so that the network structure of the glass is more compact and complete, and the density of the glass is along with Al 2 O 3 /SiO 2 Increases with the increase of the glass, and increases the flexural strength of the glass, and the thermal expansion coefficient of the glass is as that of Al 2 O 3 The content increases and decreases. Higher content of Al 2 O 3 Can greatly improve the chemical stability of the glass, improve the crystallization temperature of the glass, reduce the crystallization tendency of the glass and improve the hardness and the mechanical strength, so that the glass has excellent mechanical properties. But Al is 2 O 3 When the content exceeds a certain content, the viscosity and the surface tension of the glass liquid are high, which is unfavorable for melting, clarifying and forming, so that the high-quality high-alumina-silica touch screen cover plate glass has high requirements on the production process level, and the Al in the application 2 O 3 The mass percentage of (2) is 14-23% in a proper range.
When Na is 2 O and Al 2 O 3 When the molar ratio of (C) is less than 1, alumina is used as [ AlO ] 4 ]The form enters a glass network; when Na is 2 O and Al 2 O 3 When the molar ratio of (B) is more than 1, [ AlO is partially formed 6 ]The network exosome is in the cavity of the silicon oxygen structure network.
MgO can increase the compressive stress after strengthening, but can reduce the depth of the stress layer, so that the mass fraction of MgO is controlled within 5-6%.
In some embodiments, the composition further comprises, in mass percent: 0 to 2 percent of K 2 O, ceO 0.0-0.3% 2 And 0.0% to 0.1% Li 2 O。
In the present application, ceO 2 Belonging to rare earth elements, can improve the performances of refractive index, dispersion, density and the like of glass, and is matched with Li 2 O together plays a synergistic effect in the glass to increase the quality of the glass, and CeO simultaneously 2 Also has clarifying effect; k (K) 2 The O and MgO are used in combination to increase the compressive stress after strengthening.
In some embodiments, the composition comprises, in mass percent:
59-62% SiO 2 16-18% of Al 2 O 3 14 to 16 percent of Na 2 O, 0.5-1% K 2 O, 5 to 6 percent of MgO and 0.1 to 0.3 percent of ZrO 2 0.1 to 0.3 percent of TiO 2 0.1 to 0.3 percent of CeO 2 And 0.05 to 0.1% of Li 2 O。
The preparation method of the high-alumina glass comprises the following steps:
s1, carrying out contact mixing on all components in any composition, and sequentially carrying out melting and clarification treatment on the obtained mixed material under the condition of stirring and homogenization to obtain molten glass;
s2, sequentially forming, annealing and preserving the molten glass in the step S1 to obtain a glass sample block;
s3, under the auxiliary condition of an electric field, placing the glass sample block in the step S2 into pure KNO 3 Soaking in molten salt to obtain the high-alumina glass.
In the application, the movement speed of Na and K ions in the high-temperature molten salt is increased by externally adding alternating current, and Li and Na ions in the glass are enabled to leave the vicinity of the glass at a higher speed after being exchanged with Na and K ions in the high-temperature molten salt, so that Na and K ions in the high-temperature molten salt can be accelerated to continue the ion exchange process with the glass; the method can greatly improve the tempering efficiency of the glass by applying a certain electric field, a certain magnetic field and a certain ultrasonic wave to perform chemical strengthening to form a stress layer.
In some embodiments, the time of soaking is 0.3 to 8 hours.
In some embodiments, the soaking time is 2 to 7 hours.
In some embodiments, the soaking time is 3 to 6 hours.
By way of example, the above-described times of soaking include, but are not limited to, 0.3h, 1.0h, 1.5h, 2.0h, 2.5h, 3.0h, 3.5h, 4.0h, 4.5h, 5.0h, 5.5h, 6.0h, 6.5h, 7.0h, 7.5h, 8.0h.
In some embodiments, the conditions of electric field assistance include: the chemical tempering temperature is 380-440 ℃; the treatment time is 10-60 min.
In some embodiments, the conditions of electric field assistance include: the chemical tempering temperature is 390-425 ℃; the treatment time is 20-50 min.
As an example, chemical tempering temperatures include, but are not limited to, 380 ℃, 385 ℃, 390 ℃, 395 ℃, 400 ℃, 410 ℃, 420 ℃, 425 ℃, 430 ℃, 440 ℃; treatment times include, but are not limited to, 10min, 20min, 30min, 40min, 50min, 60min.
In some embodiments, the conditions of electric field assistance include: the treatment time is 40-50 min.
In some embodiments, the average voltage of the electric field is 20-100V. As an example, the average voltage of the electric field includes, but is not limited to, 20V, 30V, 40V, 50V, 60V, 70V, 80V, 90V, 100V.
In the application, when the cover plate glass is subjected to ion exchange, the diffusion process of potassium ions in the glass belongs to disordered diffusion, and the ion exchange rate is slower, so that the glass has longer ion exchange time under normal conditions.
In some embodiments, the electric field assistance is performed in an interval manner, wherein the interval time is 1-40 min; the time of each electric field assistance is 10-80 min.
In some embodiments, the electric field assistance is performed in an interval manner, wherein the interval time is 3-20 min; the time of each electric field assistance is 15-50 min.
In some embodiments, the electric field assistance is performed in an interval manner, wherein the interval time is 5-10 min; the time for each electric field assistance is 20-40 min.
Illustratively, the time interval includes, but is not limited to, 1min, 3min, 5min, 8min, 10min, 12min, 15min, 18min, 20min, 25min, 30min, 32min, 36min, 40min; the time of each electric field assistance includes, but is not limited to, 10min, 12min, 15min, 18min, 20min, 25min, 30min, 32min, 36min, 40min, 45min, 50min, 55min, 60min, 65min, 70min, 75min, 80min.
In the application, after the electric field is used for assisting in chemical strengthening, the alternating-current-direct current conversion of the electric field or the alternating frequency of the electric field can be regulated at intervals, after the alternating-current is used for assisting in the chemical strengthening of the electric field, the Brownian movement speed of Na and K ions in the high-temperature molten salt can be accelerated, the ion exchange speed is increased, the chemical strengthening efficiency is increased, the target chemical strengthening compressive stress and stress layer depth are reached in a relatively short time, and the energy loss is reduced. Excessive voltage can increase energy consumption, and at the same time, the ion exchange speed exceeds a certain limit, but rather, larger warpage can be generated, and the performance of the glass after ion exchange is affected.
In some embodiments, the conditions of the melt processing include: the melting temperature is 1600-1800 ℃; the melting time is 3-24 hours.
In some embodiments, the time of the melt processing is from 5 to 8 hours.
In some embodiments, the time of the melt processing is from 6 to 7 hours.
In the application, ion exchange is generally carried out at a temperature lower than the strain point, the temperature of molten salt is too low, the ion exchange speed is slower, the strengthening efficiency is lower, when the ion exchange temperature is higher, the toughening defects such as warping and the like are easy to occur, and meanwhile, the ion exchange time is reduced as much as possible so as to achieve high strengthening performance.
In some embodiments, the annealing soak treatment comprises: and (3) sequentially performing program cooling and natural cooling to room temperature from the annealing temperature reached at the end of the annealing heat preservation treatment to obtain the glass sample block.
In some embodiments, the conditions of annealing include: the annealing temperature is 570-860 ℃ and the annealing time is 1-24 h.
In some embodiments, the annealing time is 3-8 hours.
In some embodiments, the control conditions for the program cooling are: firstly, the temperature is reduced from the annealing temperature to below 400 ℃ at the cooling rate of 5-30 ℃ per hour, and then the temperature is naturally reduced.
In some embodiments, the control conditions for the program cooling are: firstly, the temperature is reduced from the annealing temperature to below 400 ℃ at the cooling rate of 10-20 ℃ per hour, and then the temperature is naturally reduced.
The high alumina glass prepared by the preparation method. The glass has higher shock resistance, lower static voltage of a tearing film, high surface compressive stress, deep stress layer depth and higher toughening efficiency.
Use of a composition as defined in any one of the above or a high alumina glass as defined above in the field of electronic display panel materials.
The present application will be described in detail with reference to specific examples.
Example 1
This example illustrates the composition for preparing high alumina glass according to the present application according to the formulation and process parameters in table 1, and the high alumina glass was prepared as follows.
The method for preparing the high alumina glass comprises the following steps:
(1) Sequentially carrying out contact mixing on the components in the composition shown in the table 1 to obtain a mixed material; placing the mixed material into a platinum crucible, and putting the platinum crucible into a resistance heating type electric furnace at 1650 ℃ for melting treatment, wherein the melting time is 8 hours; and then clarifying, homogenizing, forming and annealing and preserving the heat to obtain the glass sample block, wherein the annealing and preserving process comprises the following steps: the annealing heat preservation time is 630h, the temperature of the annealing point is reduced to below 400 ℃ at 5 ℃ per hour, and the annealing point naturally reduces to room temperature.
(2) Cutting, grinding and polishing the glass product in the step (1).
(3) And (3) carrying out chemical strengthening treatment on the glass sample block in the step (2), preheating for 30min in the air at 420 ℃, then soaking the glass sample block in pure potassium nitrate fused salt for 1h, taking out the glass sheet, standing for 10min in the air at 420 ℃, then putting the glass sheet into the pure potassium nitrate fused salt with an external 20V electric field for 10min, and repeating the operation for 5 times to obtain the high-alumina glass.
The remaining examples and comparative examples were carried out using the same procedure as in example 1, except that the composition formulation and the process parameters for preparing the high alumina glass were varied, as described in Table 1.
TABLE 1
Table 1 (subsequent table)
Table 1 (subsequent table)
Table 1 (subsequent table)
Test examples
The glass is an isotropic body with the same refractive index in all directions. If stress exists in the glass, the isotropy property is destroyed, the refractive index change is caused, the refractive indexes of the two main stress directions are not the same, thus birefringence is caused, the optical path difference is caused by the birefringence, and the degree of the optical wave birefringence is proportional to the stress existing in the glass. The principle of the stress detection of the plate glass is to measure the stress in the glass by measuring stress birefringence.
The high alumina glasses prepared in examples 1 to 10 and comparative examples 1 to 10 were subjected to performance tests including Young's modulus, refractive index, photoelastic coefficient, ball drop height (ball drop mass 130 g) when broken, and the like, and the specific test results are shown in Table 2.
The specific test method is as follows:
the glass surface stress value (CS) and the depth of surface stress layer DOL test method are tested according to the GB/T36405-2018 test method.
Young's modulus test method details are made with reference to GB/T37780-2019. The object is elongated under the action of a tensile stress, and the ratio of the tensile stress applied by the object to the relative elongation of the object.
Refractive index test method details were tested according to the method of GB/T7962.1-2010. Uncertainty of refractive index measurement of + -5X 10 -5 。
Details of the photoelastic coefficient test method are described in GB/T2680-2021.
The ball drop height test method is described in detail in GB/T39814-2021. The steel ball with specific mass is lifted to a specified height and released, potential energy of the steel ball is converted into kinetic energy, and the steel ball and the sample are subjected to rigid collision, so that the capability of the ultrathin glass and products thereof for resisting the impact damage of hard objects in the using process is simulated and predicted.
The falling ball adopted in the falling ball damage test is made of stainless steel, and has the mass of 130g and the diameter of 31.5cm. In the test, the glass device is placed on a mould made of acrylic material and made in a laboratory, the mould is started at 20cm and repeated three times, the mould is not broken, the height of the ball falling after the glass is broken is recorded by 5cm, and the ball falling experiment is carried out according to the GB/T39814-2021 standard.
TABLE 2
It should be noted that the above-described embodiments are only for explaining the present application and do not constitute any limitation of the present application. The application has been described with reference to exemplary embodiments, but it is understood that the words which have been used are words of description and illustration, rather than words of limitation. Modifications may be made to the application as defined in the appended claims, and the application may be modified without departing from the scope and spirit of the application. Although the application is described herein with reference to particular means, materials and embodiments, the application is not intended to be limited to the particulars disclosed herein, as the application extends to all other means and applications which perform the same function.
Claims (10)
1. A composition for preparing high alumina glass, characterized by comprising, in mass percent:
58-67% SiO 2 14 to 23 percent of Al 2 O 3 10 to 25 percent of Na 2 O, 3 to 7 percent of MgO and 0.1 to 0.5 percent of ZrO 2 And 0.1 to 0.5% TiO 2 。
2. The composition of claim 1, further comprising, in mass percent: 0 to 2 percent of K 2 O, ceO 0.0-0.3% 2 And 0.0% to 0.1% Li 2 O。
3. The composition according to claim 1, characterized in that it comprises, in mass percent:
59-62% SiO 2 16-18% of Al 2 O 3 14 to 16 percent of Na 2 O, 0.5-1% K 2 O, 5 to 6 percent of MgO and 0.1 to 0.3 percent of ZrO 2 0.1 to 0.3 percent of TiO 2 0.1 to 0.3 percent of CeO 2 And 0.05 to 0.1% of Li 2 O。
4. The preparation method of the high-alumina glass is characterized by comprising the following steps of:
s1, carrying out contact mixing on the components in any one of claims 1-3, and sequentially carrying out melting and clarification treatment on the obtained mixed material under the condition of stirring and homogenization to obtain molten glass;
s2, sequentially forming, annealing and preserving the molten glass in the step S1 to obtain a glass sample block;
s3, under the auxiliary condition of an electric field, placing the glass sample block in the step S2 into pure KNO 3 Soaking in molten salt to obtain the high-alumina glass.
5. The method according to claim 4, wherein the soaking time is 0.3-8 hours, preferably 2-7 hours, most preferably 3-6 hours.
6. The method of claim 4, wherein the electric field assisted conditions comprise: the chemical tempering temperature is 380-440 ℃, preferably 390-425 ℃; the treatment time is 10 to 60min, preferably 20 to 50min, most preferably 40 to 50min;
preferably, the average voltage of the electric field is 20-100V;
preferably, the electric field assistance is performed in an interval manner, wherein the interval time is 1-40 min, preferably 3-20 min, and most preferably 5-10 min; the time for each electric field assistance is 10 to 80min, preferably 15 to 50min, and most preferably 20 to 40min.
7. The production method according to any one of claims 4 to 6, wherein the conditions of the melt processing include: the melting temperature is 1600-1800 ℃; the melting time is 3-24 hours; preferably 5 to 8 hours; more preferably 6 to 7 hours;
preferably, the annealing heat-preserving treatment includes: sequentially performing program cooling and natural cooling to room temperature from the annealing temperature reached when the annealing heat preservation treatment is finished to obtain a glass sample block;
preferably, the annealing conditions include: the annealing temperature is 570-860 ℃ and the annealing time is 1-24 h; preferably 3-8h.
8. The method according to any one of claims 4 to 6, wherein the control conditions for the programmed cooling are: firstly, reducing the temperature from the annealing temperature to below 400 ℃ at a temperature reduction rate of 5-30 ℃ per hour, and then naturally reducing the temperature.
9. A high alumina glass produced by the production method according to any one of claims 4 to 8.
10. Use of a composition according to any one of claims 1 to 3 or a high alumina glass according to claim 8 or 9 in the field of electronic display panel materials.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119330590A (en) * | 2024-12-20 | 2025-01-21 | 扬州宝成特种玻璃材料有限公司 | Highly transparent explosion-proof glass and preparation process |
| CN120398411A (en) * | 2025-07-02 | 2025-08-01 | 湖南兴怀新材料科技有限公司 | High-strength, high-transmittance high-aluminum glass and preparation method thereof |
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| FR2929370A1 (en) * | 2008-03-27 | 2009-10-02 | Saint Gobain | GLAZING WITH BLADES BECOMING LIGHT BY ION EXCHANGE |
| CN102336521A (en) * | 2011-06-14 | 2012-02-01 | 吴艺菲 | Aluminum silicate glass and preparation method thereof |
| US20130059717A1 (en) * | 2011-09-02 | 2013-03-07 | Guardian Industries Corp. | Method of strengthening glass by plasma induced ion exchanges in connection with tin baths, and articles made according to the same |
| CN116282909A (en) * | 2023-01-18 | 2023-06-23 | 清远南玻节能新材料有限公司 | High alumina silicate glass and its preparation method and application |
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2023
- 2023-08-03 CN CN202310974475.XA patent/CN116903248A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2929370A1 (en) * | 2008-03-27 | 2009-10-02 | Saint Gobain | GLAZING WITH BLADES BECOMING LIGHT BY ION EXCHANGE |
| CN102336521A (en) * | 2011-06-14 | 2012-02-01 | 吴艺菲 | Aluminum silicate glass and preparation method thereof |
| US20130059717A1 (en) * | 2011-09-02 | 2013-03-07 | Guardian Industries Corp. | Method of strengthening glass by plasma induced ion exchanges in connection with tin baths, and articles made according to the same |
| CN116282909A (en) * | 2023-01-18 | 2023-06-23 | 清远南玻节能新材料有限公司 | High alumina silicate glass and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119330590A (en) * | 2024-12-20 | 2025-01-21 | 扬州宝成特种玻璃材料有限公司 | Highly transparent explosion-proof glass and preparation process |
| CN120398411A (en) * | 2025-07-02 | 2025-08-01 | 湖南兴怀新材料科技有限公司 | High-strength, high-transmittance high-aluminum glass and preparation method thereof |
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