CN107140828B - Glass composition and preparation method and application thereof - Google Patents
Glass composition and preparation method and application thereof Download PDFInfo
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- CN107140828B CN107140828B CN201710428170.3A CN201710428170A CN107140828B CN 107140828 B CN107140828 B CN 107140828B CN 201710428170 A CN201710428170 A CN 201710428170A CN 107140828 B CN107140828 B CN 107140828B
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- 239000011521 glass Substances 0.000 title claims abstract description 123
- 239000000203 mixture Substances 0.000 title claims abstract description 100
- 238000002360 preparation method Methods 0.000 title description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 20
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 20
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 20
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 18
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 18
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000003426 chemical strengthening reaction Methods 0.000 claims abstract description 12
- 238000005728 strengthening Methods 0.000 claims description 22
- 238000000137 annealing Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 235000010333 potassium nitrate Nutrition 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000006058 strengthened glass Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 239000005345 chemically strengthened glass Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 239000005304 optical glass Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 239000005347 annealed glass Substances 0.000 description 2
- 238000012993 chemical processing Methods 0.000 description 2
- 239000006059 cover glass Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000007088 Archimedes method Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Ceramic Engineering (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Glass Compositions (AREA)
Abstract
The present disclosure discloses a glass composition comprising 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%; the glass composition has higher Young modulus, is suitable for a chemical strengthening process, and the strengthened glass has good mechanical property and is resistant to damage and falling. The chemically strengthened glass composition has higher compressive stress and fracture toughness, and is suitable for various touch screen devices, especially curved surface display screen devices.
Description
Technical Field
The disclosure relates to the technical field of tempered glass, in particular to a glass composition and a preparation method and application thereof.
Background
Glass is always an indispensable material in the development of display technology, and with the development of display technology, the strength of glass can be improved by changing the composition of the surface of the glass through chemical strengthening, and the glass is more applied to the protection of display devices. At present, a tablet personal computer, a liquid crystal television, a mobile phone, a digital camera and the like are provided with a touch screen, and in the using process, the touch screen cover plate glass is easy to contact and rub, and in addition, the touch screen cover plate glass is carelessly scratched and touched, so that the generated scratch directly causes the surface roughness and the smoothness reduction of the touch screen, the using effect is influenced, and the screen is more likely to be cracked.
According to market demands, touch screen cover glass is gradually developing towards a higher quality direction. The high quality of the method is mainly embodied in the aspects of large surface stress, proper stress layer depth, heat resistance, thermal shock resistance, lightness, thinness, large-size application and the like. At present, the research progress on reducing toughness and brittleness is still poor, no breakthrough progress is made, and the damage of the touch screen cover plate glass is caused by insufficient damage resistance.
Therefore, a glass composition which has good mechanical properties after being strengthened, is resistant to damage and falling and can be prepared into high-performance touch screen cover glass is needed.
Disclosure of Invention
The purpose of the disclosure is to provide a glass composition formula, and the glass prepared by the glass composition formula is suitable for chemical strengthening, and has good mechanical properties after strengthening, and is resistant to damage and falling.
In order to achieve the above object, the present disclosure provides a glass composition comprising 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar value of the glass composition taken as 100%.
In the glass composition provided by the present disclosure, SiO2 is a component constituting the glass skeleton, SiO2 content is high, chemical resistance and mechanical strength increase, high temperature viscosity of the glass increases, and if SiO2 is too much, it is difficult to obtain a glass with long material properties. A lower SiO2 content makes glass less likely to form, decreases strain point, increases expansion coefficient, and decreases acid and alkali resistance. The SiO2 content of the present disclosure is 40 to 65 mol% in consideration of properties such as melting temperature, upper limit temperature of devitrification, glass expansion coefficient, mechanical strength, glass frit property, etc.
By incorporating Al2O3 into the glass composition provided by the present disclosure, non-bridging oxygens form aluminoxy tetrahedra with Al, which is larger in volume than the silicon-oxygen tetrahedra, resulting in larger gaps in the glass structure, facilitating ion exchange and ultimately leading to better chemical strengthening. However, the content of Al2O3 is too high to be melted. Conversely, Al2O3 content is too low, the glass is easy to crystallize, mechanical strength is low and molding is not facilitated, so that Al2O3 suitable for the present disclosure is 10 to 22 mol%.
The introduction of P2O5 into the glass composition provided by the present disclosure can increase the ion exchange speed during subsequent glass strengthening and improve the damage resistance of the glass. The addition of phosphorus to the glass replaces SiO2 in the glass with aluminum phosphate consisting of tetrahedrally coordinated aluminum and phosphorus, but the chemical stability of the glass is reduced by too high a P2O5 content, so the P2O5 content suitable for the present disclosure is 3-18 mol%.
Na2O is introduced into the glass composition provided by the disclosure, Na is the main substance of ion exchange, and the exchange between the potassium ions with larger radius and the sodium ions in the glass is carried out through the exchange between the sodium ions in the glass and the potassium ions in the molten salt, so that the squeezing effect is generated on the surface of the glass, and the effect of improving the strength of the glass is achieved. Na2O belongs to the outer body of the network and has a fluxing action, so that the melting temperature of the glass is reduced, therefore, the content of Na2O suitable for the present disclosure is 12-20 mol%.
ZnO is introduced into the glass composition provided by the disclosure, zinc element is positioned in the middle of network space, which plays a role in accumulating surrounding silicon-oxygen tetrahedron, improving the Young modulus of the glass, improving the stability of the glass, and increasing the ion exchange speed and depth, and the ZnO content suitable for the disclosure is 0.01-5 mol%.
The present disclosure also provides a method for preparing a glass composition, which includes mixing glass composition raw materials under heating conditions, melting, homogenizing, casting, and annealing, wherein the glass composition includes 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%.
The present disclosure also provides a glass composition prepared by the preparation method described above.
The present disclosure also provides for the use of a glass composition as described above in the preparation of a touch screen.
The present disclosure also provides a touch screen device using the glass composition as described above.
Through the technical scheme, the glass composition provided by the disclosure has a low expansion coefficient and a proper Young modulus, so that the glass composition is suitable for chemical strengthening and processing; the glass composition has a loose structure, the strengthening depth is deeper during short-time strengthening, and the strengthened glass composition has good fracture toughness and higher compressive stress, so that the falling resistance of the glass is improved, and the glass is not easy to devitrify.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present disclosure. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, without going to the contrary, the density of the glass composition is according to GB/T7962.15-2010 colorless optical glass test method part 20: density "was measured using the Archimedes method.
In the present disclosure, the transmittance of the glass composition is measured according to the GB/T5433-1985 method for measuring transmittance of daily glass, unless otherwise specified.
In the present disclosure, without being stated to the contrary, the young's modulus of the glass composition is according to GB/T7962.15-2010 colorless optical glass test method part 6: young's modulus, shear modulus and Poisson's ratio were measured by resonance method.
In the present disclosure, without being stated to the contrary, the acid resistance of the glass composition is according to GB/T7962.15-2010 colorless optical glass test method part 14: acid resistance stability.
In the present disclosure, the compressive stress and the strengthening depth GB/T18144-.
In the present disclosure, without going to the contrary, the fracture toughness of the glass composition is determined according to GB4161-2007 "metallic material plane strain fracture toughness KIC test method".
The first aspect of the present disclosure provides a glass composition comprising 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%.
The components of the glass composition of the present disclosure have different effects and can interact with each other to obtain suitable compositions and contents after multiple tests. The glass compositions provided by the present disclosure have a low coefficient of expansion, a suitable young's modulus, making them suitable for chemical strengthening and processing; the glass composition has a loose structure, the strengthening depth is deeper during short-time strengthening, and the strengthened glass composition has good fracture toughness and higher compressive stress, so that the falling resistance of the glass is improved, and the glass is not easy to devitrify.
According to the first aspect of the present disclosure, in order to further improve the mechanical properties of the glass composition, a balance is struck between the parameters, preferably the glass composition comprises 47 to 60 mol% SiO2, 17 to 20 mol% Al2O3, 4 to 13 mol% P2O5, 15 to 18 mol% Na2O, and 1 to 3 mol% ZnO.
According to the first aspect of the present disclosure, preferably, the glass composition consists of 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%; more preferably, the glass composition consists of 47-60 mol% SiO2, 17-20 mol% Al2O3, 4-13 mol% P2O5, 15-18 mol% Na2O, and 1-3 mol% ZnO.
According to the first aspect of the disclosure, the glass composition is suitable for a chemical strengthening process, and after being strengthened for 4 hours at the temperature of 410-450 ℃ by using KNO3 melt, the Young modulus of the glass composition is 62-76.2GPa, the compressive stress is 750-860MPa, the fracture toughness is 3.3-5 MPa-m 1/2, and the strengthening depth is 60-70 μm.
The second aspect of the present disclosure provides a method for preparing a glass composition, which includes mixing glass composition raw materials under heating conditions, melting, homogenizing, casting, and annealing, wherein the glass composition includes 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%.
According to the second aspect of the present disclosure, in order to further improve the mechanical properties of the glass composition, a balance is struck between the parameters, the glass composition comprising 47 to 60 mol% SiO2, 17 to 20 mol% Al2O3, 4 to 13 mol% P2O5, 15 to 18 mol% Na2O, and 1 to 3 mol% ZnO.
According to the second aspect of the present disclosure, preferably, the glass composition consists of 40 to 65 mol% of SiO2, 10 to 22 mol% of Al2O3, 3 to 18 mol% of P2O5, 12 to 20 mol% of Na2O, and 0.01 to 5 mol% of ZnO, based on the total molar number of the glass composition being 100%; more preferably, the glass composition consists of 47-60 mol% SiO2, 17-20 mol% Al2O3, 4-13 mol% P2O5, 15-18 mol% Na2O, and 1-3 mol% ZnO.
According to a second aspect of the present disclosure, the conditions of the melting include: the temperature is 1560-; the specific melting temperature and melting time can be determined by those skilled in the art according to practical circumstances.
According to a second aspect of the present disclosure, the annealing conditions include: the temperature is 500-700 ℃, and the time is 3-7 h; the specific annealing temperature and annealing time can be determined by one skilled in the art based on the actual circumstances.
The homogenization and cast molding may be performed by various methods conventionally used in the art; for example, the molten glass composition may be stirred to cause bubbles to escape, the components to be uniformly distributed, and the glass composition may be cast in a stainless steel mold, which is a conventionally used procedure and parameter in the art, and the present disclosure is not particularly limited thereto.
A third aspect of the present disclosure provides a glass composition produced by the production method as described above; the glass composition is suitable for processing, and the method of processing is not particularly limited in the present disclosure, and may be various processing methods conventionally used in the art, such as slicing, grinding, and chemical tempering.
A fourth aspect of the present disclosure provides a use of a glass composition as described above for the manufacture of a touch screen.
According to the fourth aspect of the present disclosure, the glass composition is chemically strengthened to improve mechanical properties when applied to the preparation of a touch screen. The chemical strengthening method may be various chemical strengthening methods conventionally used by those skilled in the art, and the present disclosure is not particularly limited thereto; preferably, the conditions for chemical strengthening include: strengthening the glass composition in a strengthening solution for 2-6h at the temperature of 410-450 ℃; more preferably, the strengthening liquid is a KNO3 melt, and components for assisting strengthening such as an accelerator and a protective agent are not required to be added.
A fifth aspect of the present disclosure provides a touch screen device in which at least one glass layer uses the glass composition as described above.
According to the fifth aspect of the present disclosure, the glass composition has a suitable young's modulus and good mechanical properties, and can be prepared into a curved display screen.
The present invention will be described in further detail below with reference to examples.
Table 1 lists the glass compositions described in the present disclosure made by the overflow process and their physical properties (density, transmittance, coefficient of expansion, young's modulus) and mechanical properties after strengthening (compressive stress, depth of strengthening and fracture toughness). The preparation method comprises the following steps: mixing the glass composition according to the proportion, putting the mixture into a platinum rhodium crucible, heating at 1580-1650 ℃ for 7h, and stirring and homogenizing by using a platinum rod to obtain a glass composition molten mass; pouring the glass composition molten mass into a mold for casting molding at room temperature, and cooling to room temperature to obtain a cast glass composition workpiece; carrying out annealing treatment on the glass composition workpiece at the temperature of 600-660 ℃ for 4h to obtain an annealed glass composition workpiece; treating the annealed glass composition workpiece in KNO3 melt at 420 ℃ for 4 hours to obtain a strengthened glass composition workpiece; the mechanical strength was measured using the strengthened glass composition workpiece as a sample.
TABLE 1
As can be seen from the numerical comparison of the examples of the present disclosure, the glass composition provided by the present disclosure has a low coefficient of expansion, Young's modulus of 62-76.2GPa, making it suitable for chemical strengthening; the glass composition has a loose structure, the strengthening depth is 60-70 mu m when the glass composition is strengthened for 4 hours, the compressive stress is 750-860MPa after the glass composition is strengthened, the fracture toughness is 3.3-5 MPa.m 1/2, the falling resistance of the glass is improved, and the glass is not easy to devitrify.
In examples 5 and 7 to 13 of the present disclosure, the glass compositions comprising 47 to 60 mol% of SiO2, 17 to 20 mol% of Al2O3, 4 to 13 mol% of P2O5, 15 to 18 mol% of Na2O, and 1 to 3 mol% of ZnO exhibited expansion coefficients of not higher than 97.3X 10-7/deg.C, and individually reached 90.2X 10-7/deg.C; the strengthening depth is not less than 62.1 μm, and the strengthening depth can reach 75.7 μm in individual embodiments; the compressive stress is not lower than 762MPa, and the individual embodiment can reach 833 MPa; the fracture toughness is not lower than 4.068 MPa.m 1/2, and the individual embodiment can reach 4.8531 MPa.m 1/2; the parameters of the glass composition within the preferred ranges disclosed herein are within a preferred range and the balance of the parameters provides the glass composition with superior performance.
The preferred embodiments of the present disclosure have been described in detail above, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (11)
1. A glass composition characterized in that the glass composition consists of 47 to 60 mol% of SiO2, 17 to 20 mol% of Al2O3, 4 to 13 mol% of P2O5, 15 to 18 mol% of Na2O, and 1 to 3 mol% of ZnO, based on the total molar number of the glass composition taken as 100%; the glass composition has a strengthening depth of 60 to 70 μm.
2. The glass composition as defined in claim 1, wherein the glass composition has a Young's modulus of 62-76.2GPa, a compressive stress of 750-860MPa, and a fracture toughness of 3.3-5 MPa-m 1/2.
3. A method for preparing a glass composition, which comprises mixing raw materials of the glass composition under heating conditions, then carrying out melt homogenization, casting molding and annealing, and is characterized in that the glass composition consists of 47 to 60mol percent of SiO2, 17 to 20mol percent of Al2O3, 4 to 13mol percent of P2O5, 15 to 18mol percent of Na2O and 1 to 3mol percent of ZnO based on the total molar number of the glass composition as 100 percent; the glass composition has a strengthening depth of 60 to 70 μm.
4. The production method according to claim 3, wherein the melting conditions include: the temperature is 1560-1650 ℃, and the time is 6-12 h.
5. The production method according to claim 3, wherein the annealing condition includes: the temperature is 500 ℃ and 700 ℃, and the time is 3-7 h.
6. A glass composition produced by the production method according to any one of claims 3 to 5.
7. Use of a glass composition according to any one of claims 1-2 and claim 6 for the manufacture of a touch screen.
8. The use of claim 7, wherein the glass composition is chemically strengthened for touch screen applications.
9. The use of claim 8, wherein the conditions of chemical strengthening comprise: strengthening the glass composition in a strengthening solution for 2-6h at the temperature of 410-450 ℃; more preferably, the strengthening liquid is a pure KNO3 melt.
10. A touch screen device wherein at least one glass layer is formed using the glass composition of any one of claims 1-2 and claim 6.
11. The touch screen device of claim 10, wherein the touch screen is a curved display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428170.3A CN107140828B (en) | 2017-06-08 | 2017-06-08 | Glass composition and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428170.3A CN107140828B (en) | 2017-06-08 | 2017-06-08 | Glass composition and preparation method and application thereof |
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| CN107140828B true CN107140828B (en) | 2019-12-06 |
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| US9815733B2 (en) * | 2013-08-29 | 2017-11-14 | Corning Incorporated | Ion exchangeable glass containing boron and phosphorous |
| KR102347803B1 (en) * | 2014-02-27 | 2022-01-06 | 코닝 인코포레이티드 | Ion exchangeable glass article for three-dimensional forming |
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