CN115448594B - Glass, and preparation method and application thereof - Google Patents
Glass, and preparation method and application thereof Download PDFInfo
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- CN115448594B CN115448594B CN202211131877.5A CN202211131877A CN115448594B CN 115448594 B CN115448594 B CN 115448594B CN 202211131877 A CN202211131877 A CN 202211131877A CN 115448594 B CN115448594 B CN 115448594B
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- 239000011521 glass Substances 0.000 title claims abstract description 92
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005728 strengthening Methods 0.000 claims abstract description 44
- 229910018068 Li 2 O Inorganic materials 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000003426 chemical strengthening reaction Methods 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 28
- 239000011734 sodium Substances 0.000 claims description 27
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 24
- 239000006121 base glass Substances 0.000 claims description 19
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 13
- 235000010344 sodium nitrate Nutrition 0.000 claims description 12
- 239000004317 sodium nitrate Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 235000010333 potassium nitrate Nutrition 0.000 claims description 9
- 239000004323 potassium nitrate Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005342 ion exchange Methods 0.000 description 11
- 229910001415 sodium ion Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000005341 toughened glass Substances 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- VVNXEADCOVSAER-UHFFFAOYSA-N lithium sodium Chemical compound [Li].[Na] VVNXEADCOVSAER-UHFFFAOYSA-N 0.000 description 3
- 229910001414 potassium ion Inorganic materials 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- -1 lithium aluminum silicon Chemical compound 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006058 strengthened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
-
- 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
-
- 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
-
- 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
Abstract
The application relates to the technical field of glass production, and discloses glass, a preparation method of the glass, the glass prepared by the preparation method and application of the glass. The glass of the application contains 50 to 62 percent of SiO by mass percent of oxide 2 17% -35% of Al 2 O 3 1 to 8 percent of Na 2 O, 0-2% K 2 O, 2% -11% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 The method comprises the steps of carrying out a first treatment on the surface of the Maximum compressive stress CS of the glass of the present application>900MPa, the strengthening depth DOL of the Na layer is more than or equal to 130 mu m, and the strengthening depth DOL of the K layer>4.0 μm, vickers hardness>600HV. The glass of the application has excellent anti-falling performance.
Description
Technical Field
The application relates to the technical field of glass production, in particular to glass, a preparation method of the glass, the glass prepared by the preparation method and application of the glass.
Background
In recent years, as 5G technology is mature, corresponding matched interconnection technologies are also developed, and 5G will provide new technical support for various cross-border fusion. The most common products in modern intelligent terminals are novel intelligent mobile phones and tablet computers, and touch screens are particularly important in the use of intelligent terminals. The cover glass of the outermost layer is one of the key materials for manufacturing the touch screen. Of course, glass may be used as both the functional material and the protective material. The common metal back cover plate will interfere with the high frequency transmission and reception of the 5G signal, so that a greater number of antennas need to be provided to improve the transmission and reception of the signal. Glass materials can better solve such problems, but the brittle nature of the materials makes them impractical for large scale use in back panels. Especially in daily use, the mobile phone is inevitably dropped and damaged, and at the moment, the glass is taken as a rear cover plate, so that the function of protecting parts in the mobile phone cannot be achieved.
Therefore, if these problems are to be solved, there is a need for glass that has both good permeability and better drop resistance, thereby increasing the lifetime of the electronic product.
Disclosure of Invention
The application aims to solve the problem of poor anti-falling performance in the prior art, and provides glass which has improved maximum compressive stress CS, enhanced depth DOL and Vickers hardness and excellent anti-falling performance.
In order to achieve the above object, a first aspect of the present application provides a glass comprising 50% -62% by mass of SiO based on the total mass of the glass 2 17% -35% of Al 2 O 3 1 to 8 percent of Na 2 O, 0-2% K 2 O, 2% -11% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 The method comprises the steps of carrying out a first treatment on the surface of the And the mass percent of each component in the glass satisfies the value of A, B, C in the formulas (1) - (3):
formula (1) a=sio 2 /(SiO 2 +Al 2 O 3 )，
B=al of (2) 2 O 3 /(Na 2 O+K 2 O+Li 2 O)，
Formula (3) c=na 2 O+K 2 O+Li 2 O，
Wherein a=0.5-0.7, b=2-4, c=8% -14%;
the maximum compressive stress CS of the glass is more than 900MPa, the strengthening depth DOL of the Na layer is more than or equal to 130 mu m, the strengthening depth DOL of the K layer is more than 4.0 mu m, and the Vickers hardness is more than 600HV.
Preferably, the glass contains 50-57% of SiO by mass percent of oxides 2 27 to 34 percent of Al 2 O 3 2% -4% of Na 2 O, 1% -2% of K 2 O, 6% -10% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 。
The second aspect of the present application provides a method for producing glass containing 50 to 62% by mass of SiO based on the total mass of the glass 2 17% -35% of Al 2 O 3 1 to 8 percent of Na 2 O, 0-2% K 2 O, 2% -11% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 The method comprises the steps of carrying out a first treatment on the surface of the And the mass percent of each component in the glass satisfies the value of A, B, C in the formulas (1) - (3):
formula (1) a=sio 2 /(SiO 2 +Al 2 O 3 )，
B=al of (2) 2 O 3 /(Na 2 O+K 2 O+Li 2 O)，
Formula (3) c=na 2 O+K 2 O+Li 2 O，
Wherein a=0.5-0.7, b=2-4, c=8% -14%;
the preparation method comprises the following steps:
(1) Mixing raw materials for preparing glass to prepare base glass;
(2) Sequentially carrying out first chemical strengthening treatment and second chemical strengthening treatment on the base glass obtained in the step (1), wherein the first chemical strengthening process comprises the step of contacting the base glass with a first strengthening liquid, and the first strengthening liquid is sodium nitrate molten salt; the second chemical strengthening process includes contacting the glass after the first chemical strengthening treatment with a second strengthening liquid that is a molten salt containing 20-30wt% sodium nitrate and 70-80wt% potassium nitrate, based on the total weight of the second strengthening liquid.
Preferably, the conditions of the first chemical strengthening treatment include: the temperature is 380-420 ℃ and the time is 1-3 hours; the conditions of the second chemical strengthening treatment include: the temperature is 370-380 ℃ and the time is 0.15-3 hours.
Preferably, the second strengthening liquid is a molten salt containing 25-30wt% sodium nitrate and 70-75wt% potassium nitrate, based on the total weight of the second strengthening liquid.
Preferably, the glass contains 50-57% of SiO by mass percent of oxides 2 27 to 34 percent of Al 2 O 3 2% -4% of Na 2 O, 1% -2% of K 2 O, 6% -10% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 。
Preferably, step (1) comprises: and mixing and melting raw materials for preparing the glass, and sequentially carrying out casting molding, annealing, cutting and polishing treatment to obtain the base glass.
In a third aspect, the present application provides glass produced by the above-described production method.
Preferably, the maximum compressive stress CS of the glass is more than 900MPa, the strengthening depth DOL of the Na layer is more than or equal to 130 mu m, the strengthening depth DOL of the K layer is more than 4.0 mu m, and the Vickers hardness is more than 600HV.
The fourth aspect of the application provides an application of the glass as a material of a front cover or a rear cover for a display screen of an intelligent terminal.
The application can produce better technical effects in the aspects of surface compressive stress value, stress layer depth, integrity rate of glass after falling, cracking resistance and the like of glass products by controlling the components and the content of the base glass and the conditions of twice chemical strengthening. Specifically, the obtained glass has obviously improved compression stress value, stress layer depth, ball falling height and other performances, the maximum compression stress CS of the reinforced glass is more than 900MPa, the reinforcement depth DOL of a Na layer is more than or equal to 130 mu m, the reinforcement depth DOL of a K layer is more than 4.0 mu m, the Vickers hardness is more than 600HV, the anti-falling height is up to 2m, the application of the glass on electronic products can be better satisfied, and the service life of the electronic products is effectively prolonged.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The first aspect of the present application provides a glass comprising 50 to 62 mass% of SiO based on the total mass of the glass 2 17% -35% of Al 2 O 3 1 to 8 percent of Na 2 O, 0-2% K 2 O, 2% -11% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 The method comprises the steps of carrying out a first treatment on the surface of the And the mass percent of each component in the glass satisfies the value of A, B, C in the formulas (1) - (3):
formula (1) a=sio 2 /(SiO 2 +Al 2 O 3 )，
B=al of (2) 2 O 3 /(Na 2 O+K 2 O+Li 2 O)，
Formula (3) c=na 2 O+K 2 O+Li 2 O，
Wherein a=0.5-0.7, b=2-4, c=8% -14%.
In the application, the maximum compressive stress CS of the glass is more than 900MPa, the strengthening depth DOL (DOL (Na)). Gtoreq.130 μm of the Na layer, and the strengthening depth DOL (DOL (K)) >4.0 μm of the K layer, and the Vickers hardness is more than 600HV.
In the application, a surface stress meter FSM-6000 is utilized to measure the surface compressive stress; ion exchange layer depth measurements were performed using a glass surface stress meter SLP-2000. The performance indicators involved are described herein: wherein CS is K + Surface compressive stress in Mpa; DOL (Na) is the depth of the CS (Na) layer in μm; DOL (K) is the depth of the CS (K) layer in μm.
According to a preferred embodiment of the application, the glass contains 50-57% SiO by mass of the oxides 2 27 to 34 percent of Al 2 O 3 2% -4% of Na 2 O, 1% -2% of K 2 O, 6% -10% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 。
The second aspect of the present application provides a method for producing glass containing 50 to 62% by mass of SiO based on the total mass of the glass 2 17% -35% of Al 2 O 3 1 to 8 percent of Na 2 O, 0-2% K 2 O, 2% -11% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 The method comprises the steps of carrying out a first treatment on the surface of the And the mass percent of each component in the glass satisfies the value of A, B, C in the formulas (1) - (3):
formula (1) a=sio 2 /(SiO 2 +Al 2 O 3 )，
B=al of (2) 2 O 3 /(Na 2 O+K 2 O+Li 2 O)，
Formula (3) c=na 2 O+K 2 O+Li 2 O，
Wherein a=0.5-0.7, b=2-4, c=8% -14%;
the preparation method comprises the following steps:
(1) Mixing raw materials for preparing glass to prepare base glass;
(2) Sequentially carrying out first chemical strengthening treatment and second chemical strengthening treatment on the base glass obtained in the step (1), wherein the first chemical strengthening process comprises the step of contacting the base glass with a first strengthening liquid, and the first strengthening liquid is sodium nitrate molten salt; the second chemical strengthening process includes contacting the glass after the first chemical strengthening treatment with a second strengthening liquid that is a molten salt containing 20-30wt% sodium nitrate and 70-80wt% potassium nitrate, based on the total weight of the second strengthening liquid.
In the present application, sodium nitrate molten salt is used as the first strengthening liquid, sodium ions (Na + ) Can replace lithium ion (Li) with 0-300 mu m depth on the surface of the lithium aluminum silicon glass + ) The glass is endowed with larger strength, the scratch tolerance capability is maximized, the strength stability of the glass is optimal, the original glass contains higher lithium ions, the firstThe lithium ion concentration difference between the strengthening liquid and the original glass provides stronger power for lithium sodium ion exchange, and is beneficial to the formation of an ion exchange layer.
In the application, the second strengthening liquid in the specific proportion range is adopted, and sodium element in the glass obtained through lithium-sodium ion exchange and potassium ion in the second strengthening liquid are subjected to second ion exchange, so that the ion quantity of the ion exchange is limited by sequentially carrying out the lithium-sodium ion exchange and the sodium-potassium ion exchange, and the phenomenon that the glass performance is reduced or self-explosion is caused by excessive plug extrusion effect generated by the ion exchange is avoided.
The second strengthening liquid is mainly used for exchanging sodium ions and potassium ions in the glass to form a deeper ion exchange layer. If the potassium nitrate content in the second strengthening liquid is lower than 70wt%, the sodium ions in the glass cannot be effectively exchanged; if the content of potassium nitrate in the second strengthening liquid is higher than 80wt%, a plug effect is easy to form, and the strengthening performance of the glass cannot be effectively improved.
In the present application, the method of preparing the base glass from the raw materials in step (1) may be a method commonly used in the art, but in order to obtain a glass having better shatter resistance, the present application provides a preferred embodiment.
Preferably, the "mixing the raw materials for preparing glass to prepare base glass" described in the step (1) includes: and mixing and melting raw materials for preparing the glass, and sequentially carrying out casting molding, annealing, cutting and polishing treatment to obtain the base glass.
The specific modes of the casting, annealing, cutting and polishing treatment are not particularly limited, and can be performed by a person skilled in the art by adopting conventional technical means in the art, so that the application is not repeated herein, and the person skilled in the art should not understand the limitation of the application.
Preferably, in the present application, the conditions of the first chemical strengthening treatment include: the temperature is 380-420 ℃ and the time is 1-3 hours.
Preferably, in the present application, the conditions of the second chemical strengthening treatment include: the temperature is 370-380 ℃ and the time is 0.15-3 hours.
According to a preferred embodiment of the application, the second strengthening liquid contains 25-30 wt.% sodium nitrate and 70-75 wt.% potassium nitrate, based on the total weight of the second strengthening liquid.
According to a preferred embodiment of the application, the glass contains 50-57% SiO by mass of the oxides 2 27 to 34 percent of Al 2 O 3 2% -4% of Na 2 O, 1% -2% of K 2 O, 6% -10% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 。
The preparation method of glass provided by the application further comprises conventional technical means such as cleaning, wiping, preheating and the like, and a person skilled in the art can select according to actual needs.
In a third aspect, the present application provides glass produced by the above-described production method.
The maximum compressive stress CS of the glass prepared by the preparation method is more than 900MPa, the strengthening depth DOL of the Na layer is more than or equal to 130 mu m, the strengthening depth DOL of the K layer is more than 4.0 mu m, and the Vickers hardness is more than 600HV.
The fourth aspect of the application provides an application of the glass as a material of a front cover or a rear cover for a display screen of an intelligent terminal.
The present application will be described in detail by examples. In the examples below, the materials used are all commercially available, and the room temperature is indicated at 25.+ -. 2 ℃.
Light transmittance: the samples were processed to a thickness of 0.7mm and subjected to parallel polishing of opposite faces, and the average light transmittance at 550nm was measured using a Hitachi U-41000-shaped spectrophotometer.
Surface stress and stress layer depth: measuring surface stress by using a surface stress meter FSM-6000; ion exchange layer depth measurements were performed using a glass surface stress meter SLP-2000.
Ball drop is an anti-falling performance test: the process is carried out by using 25g steel balls from 30cm in height, dropping the center point 3 times, rising 5cm each time, and the falling height is expressed in centimeters (cm).
Examples and comparative examples
(1) Preparation of base glass
The components and proportions of examples 1-7 and comparative examples 1-3 are shown in Table 1.
The components and proportions of examples 8-14 and comparative examples 4-6 were the same as in example 7.
The components of the examples and comparative examples were weighed according to the glass compositions shown in Table 1, mixed in a sealed bag, then poured into a platinum crucible to be melted at 1650℃for 3 hours, and after melting, the molten glass was cast in a metal mold, and the glass was transferred into a muffle furnace to be annealed at 630℃for 2 hours, and precision annealed at a cooling rate of 2℃per minute to avoid breakage due to unremoved internal stress of the glass in the later cutting, and the glass plate was made into a glass plate sample of 145X 73X 0.7mm by cutting, grinding, to thereby obtain a base glass.
(2) Chemical strengthening treatment
Procedure for chemical strengthening treatment of examples 1-7 and comparative examples 1-3:
preheating the base glass for 1 hour at 360 ℃, immersing the preheated base glass in a first strengthening liquid (sodium nitrate molten salt) and treating at 380 ℃ for 2 hours to obtain strengthened glass I; after the tempered glass I is cooled and radiated to room temperature, pure water is used for cleaning, wiping and secondary preheating (the temperature is 360 ℃ and the time is 1 hour) to obtain the tempered glass I after secondary preheating, and the tempered glass I after secondary preheating is immersed into a second tempered liquid (30 wt% sodium nitrate fused salt and 70wt% potassium nitrate fused salt) and treated for 2 hours at 370 ℃ to obtain the tempered glass II. The performance parameters of the tempered glass II were measured and the specific results are shown in table 1.
The conditions of the chemical strengthening treatments of examples 8 to 14 and comparative examples 4 to 6 are shown in Table 2.
TABLE 1
As can be seen from table 1: example 1-example 7 when the components of the glass meet the range and A, B, C values meet the technical scheme requirements of the application, a high-strength cover plate glass is obtained through a chemical strengthening process, the transmittance of the obtained glass for visible light at 550mm is 90%, the surface compressive stress CS is greater than 900MPa after chemical strengthening, the depth of a CS (Na) layer is greater than or equal to 130 mu m, and the depth of a CS (K) layer is greater than 4.0 mu m, and the obtained glass has excellent chemical strengthening performance; the falling ball height is more than 180cm.
The above properties are significantly reduced for comparative examples 1 (D1), 2 (D2) and 3 (D3) in which the glass composition and/or A, B, C values do not meet the requirements of the present application, and particularly for comparative examples 2 and 3 in which A, B, C values differ significantly from the present application, the CS is less than 850mpa, the depth of the CS (Na) layer is <130 μm, the depth of the CS (K) layer is <3.5 μm, and the ball drop height is not higher than 170cm.
Therefore, when the content of each component and the values of A, B and C in the glass composition are both within the scope of the application, compared with the case that the content of each component is not within the scope of the application and only the content of each component meets the scope of the application but A, B, C does not meet the requirements, the glass composition has better technical effects on the surface compressive stress value, the stress layer depth, the integrity rate of glass after dropping, the cracking resistance and the like of a glass product.
TABLE 2
Table 2 is mainly used to illustrate the effect of the compressive stress values, stress layer depths and ball drop heights obtained by different chemical strengthening methods for a given composition and content of ingredients; examples 8-14 and comparative example 4 (D4), comparative example 5 (D5), comparative example 6 (D6) were each chemically strengthened twice.
From table 2 it can be seen that: when the strengthening conditions of the embodiment 13 are met, the surface compressive stress CS of the strengthened product reaches 950Mpa, the falling ball height reaches 200cm, and the product has very excellent chemical strengthening performance; the performance of comparative examples 5 and 6 is inferior to that of examples, except that the molten salt ratio of the strengthening liquid used for the second chemical strengthening is different, and the performance of comparative example 4 is worst because the second chemical strengthening time is shorter, so that the CS stress layer depth and ball drop height of the product after the strengthening are lower. From the above results, it can be seen that the above-mentioned related properties are significantly improved by strengthening the product by adopting the strengthening process technical scheme of the present application.
The preferred embodiments of the present application have been described in detail above, but the present application is not limited thereto. Within the scope of the technical idea of the application, a number of simple variants of the technical solution of the application are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the application, all falling within the scope of protection of the application.
Claims (5)
1. A glass comprising 50 to 57 mass% of SiO based on the total mass of the glass 2 27 to 34 percent of Al 2 O 3 2% -4% of Na 2 O, 1% -2% of K 2 O, 6% -10% Li 2 O, 0-2% B 2 O 3 And 3% -5% ZrO 2 ；
And the mass percent of each component in the glass satisfies the value of A, B, C in the formulas (1) - (3):
formula (1) a=sio 2 /（SiO 2 +Al 2 O 3 ），
B=al of (2) 2 O 3 /（Na 2 O+K 2 O+Li 2 O），
Formula (3) c=na 2 O+K 2 O+Li 2 O，
Wherein a=0.5-0.7, b=2-4, c=8% -14%;
the maximum compressive stress CS of the glass is more than 900MPa, the strengthening depth DOL of the Na layer is more than or equal to 130 mu m, the strengthening depth DOL of the K layer is more than 4.0 mu m, and the Vickers hardness is more than 600HV.
2. The method of making glass according to claim 1, comprising:
(1) Mixing raw materials for preparing the glass to prepare base glass;
(2) Sequentially carrying out first chemical strengthening treatment and second chemical strengthening treatment on the base glass obtained in the step (1), wherein the first chemical strengthening process comprises the step of contacting the base glass with a first strengthening liquid, and the first strengthening liquid is sodium nitrate molten salt; the second chemical strengthening process comprises contacting the glass after the first chemical strengthening treatment with a second strengthening liquid which is a molten salt containing 20-30wt% sodium nitrate and 70-80wt% potassium nitrate based on the total weight of the second strengthening liquid;
the conditions of the first chemical strengthening treatment include: the temperature is 380-420 ℃ and the time is 1-3 hours; the conditions of the second chemical strengthening treatment include: the temperature is 370-380 ℃ and the time is 0.15-3 hours.
3. The method of claim 2, wherein the second strengthening liquid is a molten salt containing 25-30wt% sodium nitrate and 70-75wt% potassium nitrate, based on the total weight of the second strengthening liquid.
4. The preparation method according to claim 2, wherein step (1) comprises: and mixing and melting raw materials for preparing the glass, and sequentially carrying out casting molding, annealing, cutting and polishing treatment to obtain the base glass.
5. Use of the glass of claim 1 as a material for a front or rear cover for a display screen of a smart terminal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110803872A (en) * | 2019-12-05 | 2020-02-18 | 四川旭虹光电科技有限公司 | Inorganic strengthened glass and preparation method and application thereof |
| CN110937824A (en) * | 2019-12-05 | 2020-03-31 | 四川旭虹光电科技有限公司 | Chemically strengthened glass and preparation method and application thereof |
| CN110981188A (en) * | 2019-12-05 | 2020-04-10 | 四川旭虹光电科技有限公司 | Inorganic chemically strengthened glass and preparation method and application thereof |
| CN114671618A (en) * | 2022-04-24 | 2022-06-28 | 清远南玻节能新材料有限公司 | Microcrystalline glass, tempered glass, and preparation method and application thereof |
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| CN114956602A (en) * | 2021-02-26 | 2022-08-30 | Ａｇｃ株式会社 | Chemically strengthened glass and method for producing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803872A (en) * | 2019-12-05 | 2020-02-18 | 四川旭虹光电科技有限公司 | Inorganic strengthened glass and preparation method and application thereof |
| CN110937824A (en) * | 2019-12-05 | 2020-03-31 | 四川旭虹光电科技有限公司 | Chemically strengthened glass and preparation method and application thereof |
| CN110981188A (en) * | 2019-12-05 | 2020-04-10 | 四川旭虹光电科技有限公司 | Inorganic chemically strengthened glass and preparation method and application thereof |
| CN114671618A (en) * | 2022-04-24 | 2022-06-28 | 清远南玻节能新材料有限公司 | Microcrystalline glass, tempered glass, and preparation method and application thereof |
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