CN114560631B - Blue light-proof cover plate glass and preparation method and application thereof - Google Patents
Blue light-proof cover plate glass and preparation method and application thereof Download PDFInfo
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- CN114560631B CN114560631B CN202111321603.8A CN202111321603A CN114560631B CN 114560631 B CN114560631 B CN 114560631B CN 202111321603 A CN202111321603 A CN 202111321603A CN 114560631 B CN114560631 B CN 114560631B
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- 239000005357 flat glass Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 48
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 12
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 10
- 238000003426 chemical strengthening reaction Methods 0.000 claims abstract description 7
- 239000006059 cover glass Substances 0.000 claims description 27
- 150000002500 ions Chemical class 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 238000005728 strengthening Methods 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000006058 strengthened glass Substances 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000006060 molten glass Substances 0.000 claims description 3
- 241001025261 Neoraja caerulea Species 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 16
- 239000011734 sodium Substances 0.000 description 14
- 239000010410 layer Substances 0.000 description 12
- 230000002265 prevention Effects 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 8
- 238000000695 excitation spectrum Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000005284 excitation Effects 0.000 description 5
- 238000002189 fluorescence spectrum Methods 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000005341 toughened glass Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- -1 rare earth ion Chemical class 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000035719 Maculopathy Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 208000002780 macular degeneration Diseases 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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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
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- 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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Abstract
The invention provides a blue light-proof cover plate glass, a preparation method and application thereof, wherein the blue light-proof cover plate glass contains 50-75% of SiO by mole percent of oxide 2 、2‑15％Al 2 O 3 、10‑20％Na 2 O、5‑15％MgO、0‑5％K 2 O, 0-6% CaO and 0.01-1% Pr 3+ . The blue light-proof cover plate glass can effectively absorb blue light with the wave band of 430-480nm, which is harmful to human eyes, has a blue light-proof effect, can ensure that the glass has higher strength and hardness, and has deeper surface stress layer and surface compressive stress after chemical strengthening, thereby improving the strength and having excellent mechanical properties. The preparation method is simple, does not need to be attached or coated, does not need secondary processing, has low cost, is suitable for the field of displays, and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of glass production, relates to a plate glass material, and in particular relates to blue light-proof cover plate glass and a preparation method and application thereof.
Background
Blue light is an important component of visible light, has short light wave and high energy, can directly penetrate the lens of eyes to cause maculopathy, and is one of factors causing eye fatigue.
With the improvement of living standard, smartphones, tablet computers, LED display televisions and the like are becoming popular, and a large amount of blue light is emitted by the display devices. An OLED (Organic Light-Emitting Diode), which is commonly referred to as an "Organic Light Emitting Diode", is a display screen technology. Each pixel point of the screen panel of the OLED organic television can independently emit light, and a backlight source is not needed. The OLED organic luminous body has 3317 tens of thousands of solid particles, can automatically emit light, and can generate needed color light only by inputting voltage into the electrode, the generated blue light wave band is mainly concentrated near 435-450nm, and the wave band has the greatest damage to eyes.
The blue light-proof glass effectively blocks damage of blue light to human eyes, so that the blue light-proof glass is widely used in screen protection glass of electronic products.
CN 208006397U discloses an ultra-thin anti-blue light toughened glass film, including toughened glass piece, toughened glass piece lower surface pastes has a protection film, a protection film lower surface paste has a viscose membrane, a viscose membrane lower surface paste has the plastic film, toughened glass piece upper surface is equipped with a pair of rectangle gasket, every a rectangle gasket upper surface paste together has the insulating piece, the insulating piece upper surface paste has No. two protection films, no. two protection film upper surface is equipped with a pair of No. two rectangle gaskets, every No. two rectangle gasket upper surfaces paste No. two viscose membranes together, no. two viscose membrane upper surfaces paste has the blue light prevention film, no. three protection films are pasted to blue light prevention film upper surface. Most of the existing blue light-proof glass is of an adhesive structure, namely, a protective film is adhered to the surface of cover plate glass, after the film is adhered, the transmittance is reduced, visual effect is affected, meanwhile, all layers are fixed through adhesion, the sealing performance of the adhesive layer is poor, all layers can be peeled off or fall off after long-term use, the functions of the blue light-proof glass are affected, besides, the edges of the blue light-proof glass screen-protection glass are prone to chipping when the layers are impacted by external force, and a screen is scrapped when the layers are severe.
CN 107651863a discloses a preparation method of a coated glass for a mobile phone cover plate capable of stopping blue light. The method comprises the following steps: a) Cleaning the glass substrate; b) Strengthening the edge of the glass substrate; c) Cutting and then edging; d) Tempering; e) Evaporating the blue light prevention film material by adopting an electron gun, and depositing the blue light prevention film material on the surface of cover plate glass under the action of an ion source to form a blue light prevention film layer; f) And evaporating the light anti-reflection film material by adopting an electron gun, and depositing the light anti-reflection film material on the blue light prevention film layer under the action of an ion source to obtain the light anti-reflection film layer. In order to improve the transmittance, a blue light cut-off film is plated on the mobile phone cover plate, and the method can prevent blue light from transmitting. The method requires cleaning, cutting, strengthening, and then heating at 2.0X10 -3 And under the Pa vacuum condition, evaporating the blue light preventing film material by using an electron gun, and depositing the evaporated blue light preventing film material on the surface of the cover plate glass to form a blue light preventing layer. The method has complex process and high cost.
Accordingly, there is a need in the art to develop a blue light-proof cover glass having high strength and improved transmittance without secondary lamination.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide blue light prevention cover plate glass and a preparation method and application thereof.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in one aspect, the present invention provides a blue light resistant cover glass comprising, in mole percent on an oxide basis, 50-75% SiO 2 、2-15％Al 2 O 3 、10-20％Na 2 O、5-15％MgO、0-5％K 2 O、0-6％CaO；
The blue light-proof cover plate glass also comprises Pr 3+ The Pr is calculated as 100% of the total mole percent of the oxide 3+ The mol percentage content of (2) is 0.01-1%.
According to the invention, the components of the blue light-proof cover plate glass are selected to be mutually matched, so that blue light with the wave band of 430-480nm, which is harmful to human eyes, can be effectively absorbed, the blue light-proof effect is achieved, the glass has higher strength and hardness, and after chemical strengthening, the glass has a deeper surface stress layer and surface compressive stress, so that the strength is improved, and the glass has excellent mechanical properties.
In the present invention, the blue light-proof cover glass may contain 50%, 53%, 55%, 58%, 60%, 63%, 65%, 68%, 70%, 73% or 75% of SiO in terms of mole percent of oxides 2 May contain 2%, 4%, 4.5%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13% or 15% of Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the May contain 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, 16%, 17%, 18%, 19% or 20% Na 2 O; may contain 5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 11%, 12%, 13%, 14% or 15% MgO; may contain 0.5%, 0.8%, 1%, 1.3%, 1.5%, 1.8%, 2%, 2.3%, 2.5%, 2.8%, 3%, 3.5%, 3.8%, 4%, 4.5%, 4.8% or 5% K 2 O; 0.5%, 0.7%, 0.9%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.5%, 2.8%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% or 6% CaO may be contained; may contain 0.01%, 0.03%, 0.05%, 0.08%, 0.1%, 0.3%, 0.5%, 0.7%, 0.9% or 1% Pr 3+ 。
In the present invention, siO 2 Is an essential component for forming a glass framework, can improve the chemical resistance and mechanical strength of glass, and adopts silica sand for industrial production as a raw material; in the present invention, if SiO 2 If the content is too high, the required melting temperature is high, crystallization is easy, if SiO 2 If the content is too small, the hardness and mechanical strength of the glass will be lowered, preferably the SiO 2 The molar percentage content of (2) is 65-75%.
In the present invention, al 2 O 3 Can improve the chemical strengthening performance of the glass in the glass, and the raw material is chemical raw material Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the In the present invention, if Al 2 O 3 If the content is too high, the viscosity of the glass increases, the melting temperature of the glass increases, and if Al 2 O 3 If the content is too small, the refractory material is severely corroded by the glass, the mechanical strength and hardness of the glass are reduced, preferably the Al 2 O 3 The mol percent of (2) is 2-6%.
In the present invention, na 2 O is a network modifier oxide, and can play a role in fluxing, in the field of cover glass, na ion-containing glass can be subjected to ion exchange with K ions in molten salt on the surface layer of the glass, so that the purpose of strengthening is achieved, and chemical raw material sodium carbonate is selected; in the present invention, if Na 2 Excessive O content increases the expansion coefficient of the glass, reduces the thermal stability and mechanical strength of the glass, and if Na 2 When the O content is too low, the viscosity of the glass is increased, na is used as a main ion for chemically strengthening ion exchange, and the strengthening performance of the glass is correspondingly weakened; preferably, the Na 2 The mol percentage of O is 12-15%.
In the present invention, K 2 O is an external oxide of a network, plays a role of fluxing, and in a certain concentration range, a proper amount of K ions can improve the strengthening performance of the glass, and chemical raw materials of potassium carbonate are selected; in the present invention, if K 2 Excessive mole percentage of O can affect the ion exchange process of Na and K in the strengthening process, K 2 Action of O and Na 2 O acts similarly, but too much K2O increases the viscosity of the glass, preferably the K 2 The mol percent of O is 0-3%.
In the invention, the viscosity of each melting temperature range of the glass can be regulated by the alkaline earth metal oxides CaO and MgO so as to be beneficial to melting and forming, and meanwhile, various performances of the glass, such as chemical stability, mechanical strength and the like, can be improved, and the raw materials for providing the alkaline earth metal oxides are dolomite and magnesia. In the present invention, if the MgO content is too much, the high temperature viscosity of the glass is increased, the melting is difficult, the content is too small, the crystallization speed of the glass is increased, the mechanical strength is lowered, and preferably, the mole percentage of MgO is 5-10%; in the present invention, if the CaO content is excessive, the glass becomes brittle, and Ca ions have a similar ionic radius to Na ions during strengthening, reducing Na and K ion exchange rates.
In the present invention, pr ion is a rare earth ion, since Pr 3+ The f-f and f-d transition exists, so that the energy level is rich, pr ions are focused more in the infrared light emitting field, little in the down-conversion field, pr ions can absorb blue light of 430-480nm, and particularly, the absorption of blue light near 450nm is strong. The invention adopts Pr ion to absorb harmful blue light near 450nm, and provides Pr ion oxide as Pr 6 O 11 。
Preferably, the blue light-proof cover glass contains 65-75% SiO in terms of mole percent of oxide 2 、2-6％Al 2 O 3 、12-15％Na 2 O、5-10％MgO、0-3％K 2 O, 0-6% CaO and 0.01-1% Pr 3+ 。
Preferably, the thickness of the blue light-proof cover glass is 0.3-0.7mm, for example 0.3mm, 0.4mm, 0.5mm, 0.6mm or 0.7mm.
On the other hand, the invention provides a preparation method of the blue light-proof cover plate glass, which comprises the following steps: according to the mole percentage of oxide in the blue light prevention cover plate glass, the glass raw materials are mixed and melted, molten glass liquid is poured into cold water, dried and melted again, and the blue light prevention cover plate glass is obtained after casting molding (the mode is a water quenching method, the aim is to make all components of the glass liquid more uniform), annealing treatment and cutting processing.
Preferably, the melting is performed at 1550-1600 ℃ (e.g., 1550 ℃, 1560 ℃, 1570 ℃, 1580 ℃, 1590 ℃, or 1600 ℃) for 6-10 hours (e.g., 6 hours, 7 hours, 8 hours, 9 hours, or 10 hours).
Preferably, the cold water has a temperature of 10-50 ℃, such as 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃ or 50 ℃.
Preferably, the remelting is to be incubated at 1550-1600 ℃ (e.g. 1550 ℃, 1560 ℃, 1570 ℃, 1580 ℃, 1590 ℃ or 1600 ℃) for 6-10 hours (e.g. 6 hours, 7 hours, 8 hours, 9 hours or 10 hours).
Preferably, the annealing temperature is 550-660 ℃, e.g. 550 ℃, 560 ℃, 570 ℃, 580 ℃, 590 ℃, 600 ℃, 620 ℃, 640 ℃ or 660 ℃.
In another aspect, the present invention provides a blue-light-preventing photochemically strengthened glass obtained by chemically strengthening the blue-light-preventing cover glass described above.
Preferably, the temperature of the chemical strengthening is 390-435 ℃, e.g., 390 ℃, 395 ℃, 400 ℃, 410 ℃, 420 ℃, 435 ℃, or 435 ℃.
After being chemically strengthened at 390-435 ℃, the blue light-proof cover plate glass has higher strength and hardness, and a surface stress layer of 10-50 mu m (such as 10 mu m, 13 mu m, 15 mu m, 18 mu m, 20 mu m, 25 mu m, 30 mu m, 35 mu m, 40 mu m, 45 mu m or 50 mu m) is formed on the surface of the glass, wherein the surface compressive stress can reach 400-900MPa (such as 400MPa, 430MPa, 450MPa, 480MPa, 500MPa, 600MPa, 700MPa, 800MPa or 900 MPa).
In another aspect, the invention provides a display device comprising a blue-protected photochemically strengthened glass as described above.
Preferably, the display device is a touch panel display.
Compared with the prior art, the invention has the following beneficial effects:
the blue light-proof cover plate glass can effectively absorb blue light with the wave band of 430-480nm, which is harmful to human eyes, has a blue light-proof effect, can ensure that the glass has higher strength and hardness, and has deeper surface stress layer and surface compressive stress after chemical strengthening, thereby improving the strength and having excellent mechanical properties. The preparation method is simple, does not need to be attached or coated, does not need secondary processing, has low cost, is suitable for the field of displays, and has wide application prospect.
Drawings
FIG. 1 is a fluorescence spectrum of the blue light preventing cover glass of example 1 and example 4 at an excitation wavelength of 450 nm;
FIG. 2 is a graph showing fluorescence excitation spectra of the blue light preventing cover glass of example 1 and example 4 at an emission wavelength of 600 nm;
FIG. 3 is a fluorescence excitation spectrum at an emission wavelength of 600nm of the blue light preventing cover glass of example 2, example 7 and example 8.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
In this example, the blue light-proof cover glass contains 70% SiO in mole percent of oxides 2 、2.7％Al 2 O 3 、14.8％Na 2 O、5.5％MgO、1％K 2 O、6％CaO；
The blue light-proof cover plate glass also comprises Pr 3+ The Pr is calculated as 100% of the total mole percent of the oxide 3+ Is 0.18 mol%.
The preparation method comprises the following steps: weighing the components according to the mole percentage of oxides in the blue light-proof cover plate glass, mixing the glass raw materials, preserving heat for 8 hours at 1560 ℃ to melt, pouring molten glass into cold water at 20 ℃, preserving heat for 8 hours again at 1560 ℃ to melt, casting on a copper plate to form, and annealing at 580 ℃ to obtain the blue light-proof cover plate glass with the thickness of 0.7mm.
Examples 2 to 8
Examples 2 to 8 differ from example 1 in that the blue light-protective cover glass has the composition shown in Table 1 in terms of mole percent of oxides. Except for this, the blue light-proof cover glass was prepared in the same manner as in example 1.
The blue light-proof cover glass of examples 1 to 8 was chemically strengthened at 420℃for 4 hours to obtain a strengthening depth and compressive stress values shown in Table 1.
TABLE 1
As can be seen from Table 1, the blue light-proof cover glass of the present invention has sufficient depth of stress layer and higher surface compressive stress after chemical strengthening.
Fluorescence spectrum tests (fluorescence spectrophotometer, model F-4600, hitachi, japan) were performed on the blue light-proof cover glass of examples, and the fluorescence spectra of examples 1 and 4 are provided in FIG. 1. By literature reading, excitation is performed by selecting 450nm excitation wavelength to obtain fluorescence spectra of examples 1 and 4, and it can be seen that two main peaks exist in 484nm and 600nm bands, and the excitation spectrum of the sample can be determined by monitoring the two bands of the fluorescence spectrum.
Fig. 2 provides the excitation spectra of examples 1 and 4. The excitation spectrum obtained is monitored at the wavelength of 600nm, and the fact that Pr ions are strongly absorbed at 430-480nm shows that the blue light-proof glass can absorb blue light wave bands of 430-480nm, and the excitation peak value of the embodiment 1 (Pr: 0.18 mol%) is higher than the excitation peak value of the embodiment 4 (Pr: 0.1 mol%) and is related to the concentration of Pr ions, and the capability of absorbing blue light of the glass can be regulated by regulating the concentration of Pr ions. When the Pr ion concentration is 0.18mol%, the color of the glass is deepened somewhat, the higher mole percent content is 2%, the rare earth ion is quenched in concentration at a certain concentration, and the performance of the glass matrix is influenced by the too high rare earth ion content; when the content is too small, the blue light absorbing ability is lowered.
FIG. 3 shows the excitation spectra of example 2, example 7 and example 8, wherein CaO content is 6mol%, 4mol% and 8mol%, respectively; na (Na) 2 The O content was 14.8mol%, 16.8mol% and 12.8mol%, respectively. It can be seen that as Na 2 The O content is increased, the excitation spectrum is gradually enhanced, but according to the enhancement result, the Na content is higher 2 O increases the strengthening depth, but the CS value is greatly reduced, and Al is increased as in example 3 2 O 3 At a level to meet a higher CS value but withoutSuspected increase in Na 2 O and Al 2 O 3 The mole percent of (c) increases the cost of the glass.
The applicant states that the blue light-proof cover glass of the present invention and its preparation method and application are described by the above examples, but the present invention is not limited to the above examples, i.e. it does not mean that the present invention must be practiced by relying on the above examples. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of selected raw materials, addition of auxiliary components, selection of specific modes, etc. fall within the scope of the present invention and the scope of disclosure.
Claims (14)
1. A blue light-proof cover plate glass is characterized by comprising 50-68% of SiO in terms of mole percent of oxide 2 、2-5％Al 2 O 3 、13-14.8％Na 2 O、5-5.5％MgO、0.5-3.8％K 2 O, 4.5-6% CaO; the blue light-proof cover plate glass also comprises Pr 3+ The Pr is calculated as 100% of the total mole percent of the oxide 3+ The mol percentage content of (2) is 0.01-1%.
2. The blue light resistant cover glass according to claim 1, wherein the oxide providing Pr ions is Pr 6 O 11 。
3. The blue-protected cover glass according to claim 1, wherein the K 2 The mol percentage of O is 0.5-3%.
4. The blue-ray-resistant cover glass according to claim 1, wherein the blue-ray-resistant cover glass contains 65 to 68% sio in mole percent of oxides 2 、2-5％Al 2 O 3 、13-14.8％Na 2 O、5-5.5％MgO、0.5-3％K 2 O、4.5-6％CaO；
The blue light-proof cover plate glass also comprises Pr 3+ In total moles of oxides as described aboveThe Pr is calculated as 100 percent by mole 3+ The mol percentage content of (2) is 0.01-1%.
5. The blue-ray cover glass according to claim 1, wherein the thickness of the blue-ray cover glass is 0.3-0.7mm.
6. The method for producing a blue light-proof cover glass according to any one of claims 1 to 5, wherein the method for producing is: according to the mole percent of the oxide in the blue light-proof cover glass as claimed in any one of claims 1 to 5, the glass raw materials are mixed, melted, molten glass is poured into cold water, dried, melted again, cast and molded, and then annealed, and the blue light-proof cover glass is obtained after cutting.
7. The method of claim 6, wherein the melting is performed at 1550-1600 ℃ for 6-10 hours.
8. The method according to claim 6, wherein the cold water has a temperature of 10 to 50 ℃.
9. The method of claim 6, wherein the remelting is performed at 1550-1600 ℃ for 6-10 hours.
10. The method of claim 6, wherein the annealing is performed at a temperature of 550-660 ℃.
11. A blue-proof photochemically strengthened glass obtained by chemically strengthening the blue-proof cover glass according to any one of claims 1 to 5.
12. The blue-protected photochemically strengthened glass according to claim 11, wherein the temperature of the chemical strengthening is 390-435 ℃.
13. A display device comprising the blue-protected photochemically strengthened glass according to claim 11 or 12.
14. The display device of claim 13, wherein the display device is a touch panel display.
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