CN107935378A - A kind of high strength glass for display device and preparation method thereof - Google Patents
A kind of high strength glass for display device and preparation method thereof Download PDFInfo
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- CN107935378A CN107935378A CN201711003895.4A CN201711003895A CN107935378A CN 107935378 A CN107935378 A CN 107935378A CN 201711003895 A CN201711003895 A CN 201711003895A CN 107935378 A CN107935378 A CN 107935378A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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Abstract
A kind of high strength glass for display device of the invention and preparation method thereof, improves the intensity of glass in terms of component design and intensifying method two, significant synergistic effect is wherein played between component, by introducing new component CeO2And TiO2, and define the relation with contents between each component, especially by (Na2O+K2O)/Al2O3、K2O/(Na2O+Li2O a certain range) is maintained, improves the quantity of ion exchange and the depth of ion exchange, and by limiting TiO2、ZrO2And CeO2Synergistic effect between three improves the heat endurance of glass, and the performance of ion exchange.Finally by ion exchange twice; so that glass mechanical property greatly improves; so that invention gained glass has higher bearing stress, Vickers hardness and excellent strain point and heat endurance, there is resistance to compression, anti-scratch, anti-zoned performance, can be widely applied to the cover sheet of display device.
Description
Technical field
The present invention relates to glassmaking art, is specially a kind of high strength glass and its preparation for display device
Method.
Background technology
In recent years, the touch-screen electronic product such as smart mobile phone, tablet computer and electronic reading device is quickly grown, by
In inevitably producing touching, friction, or even delineation in use, resulting cut accumulation causes display screen table
Face is coarse, and finish reduces, and adds light scattering, reduces transmitance, cause brightness, the color of touch-screen electronic product
Degree, uniformity and resolution ratio have declined, thus for screen with the intensity of cover board, wear-resisting property propose higher will
Ask.
In cover board developing history, organic material was once used as the cover sheet of display device, but organic material is due to easy
The limitation that the materials such as aging, transmitance be poor are brought in itself, is not used widely.Due to the limitation of organic material, industry
Then common glass is studied as cover plate materials, wherein how to improve the emphasis that its intensity is research.
In the prior art, Chinese patent CN102351421A discloses a kind of chemical tempering of display device cover sheet
Glass；The glass by mass percentage, by the SiO of 54-65%2, 10-17% Al2O3, 8-16% Na2O, 0-0.5%
Li2O, the K of 0-6%2O, the B of 0.01-3%2O3, 0.1-5% MgO, 0.1-5% CaO, 0.01-2% SrO, 0.01-
1% ZrO2With the SnO of 0.01-1%2Composition；And by the processing of specified chemical tempering, improve the case hardness, anti-scratch of glass
Wear-resisting property.
Chinese patent CN102320740A discloses a kind of manufacture method of hardened glass substrate, according to formation with quality %
Count the SiO containing 40-71%2, 3-21% Al2O3, 0-3.5% Li2O, the Na of 7-20%2O, the K of 0-15%2The glass of O
The mode of composition concocts frit, after being melted, being shaped with tabular, carries out ion-exchange treatment, is formed in glass surface
Compressive stress layers.
Chinese patent CN104692636A discloses a kind of preparation method of complex intensifying glass, by preheating glass-
Ion exchange-preheating-ion-exchange treatment, two surfaces up and down of glass body form the stress reinforced layer of compound compressed, this is multiple
Combined pressure stress under compression strengthening layer includes at least two independent sub- strengthening layers, and described at least two independent sub- strengthening layers are along the glass
The direction arrangement that glass body surface extends inward.
But the method for the above-mentioned prior art, although the intensity of glass is improved to a certain extent, relative to industry
Bound pair it is expected to still have a certain distance in the display device glass of high intensity, high-wearing feature, therefore research has higher
The preparation method of the glass of intensity is still the important research direction of glass manufacturing area.
The content of the invention
For problems of the prior art, the present invention provides a kind of high strength glass and its system for display device
Preparation Method, intensity is high, and wearability is good, disclosure satisfy that the requirement of industry.
The present invention is to be achieved through the following technical solutions：
A kind of preparation method of high strength glass for display device, includes the following steps,
1) according to the following raw materials of mass percent precise：
The SiO of 54-65%2, 10-17% Al2O3, 0-0.7% Li2O, the Na of 12-16%2O, the K of 0.2-6%2O、
The B of 0.01-3%2O3, 0.1-5% MgO, 0.1-5% CaO, 0.01-3% SrO, 0.01-1.2% ZrO2、0.01-
1% CeO2, 0.01-1% SnO2And the TiO of 0.01-0.8%2；
And also meet following relation between each component mass percent：
(Na2O+K2O)/Al2O3For 1.1-1.4；
K2O/(Na2O+Li2O) it is 0.01-0.5；
ZrO2/CeO2For 0.5-2；
TiO2/(ZrO2+CeO2) it is 0.01-5；
2) it is melted after the raw material in step 1) is sufficiently mixed uniformly and forms glass metal；
3) plate glass is prepared in glass metal and is made annealing treatment；
4) cutting and the glass plate of grinding and polishing after annealing, then be warming up to after cleaning glass pane surface at 330-380 DEG C
Keep the temperature 1-4h, be placed in 430-500 DEG C of fused potassium nitrate liquid keep the temperature 4-10 it is small when carry out primary ions exchange；
5) take out the glass plate after primary ions exchange and be cooled to 330-380 DEG C, and keep the temperature 1-4h, continue cool to afterwards
Room temperature, then heats at 340-390 DEG C and keeps the temperature 2-6h, be placed in 430-500 DEG C of melting rubidium nitrate liquid keep the temperature 2-6 it is small
Shi Jinhang Two-step ion-exchangings；Two-step ion-exchanging postcooling is to room temperature；Glass pane surface is cleaned again up to display is used for
The high strength glass of part.
Preferably, step 2) concretely comprises the following steps, and T1 is warming up to after the raw material in step 1) is sufficiently mixed uniformly, reacts
Glass metal is obtained after when 5-10 is small, then is cooled to T2 and keeps the temperature 60-120 minutes；Wherein, T1 is 1550-1650 DEG C, T2 1500-
1600 DEG C, and, T1-T2 is 50-100 DEG C.
Preferably, step 3) concretely comprises the following steps, and glass metal is poured into plate glass is cooled in template, by plate glass
Carried out at a temperature of being placed in 500-600 DEG C again annealing 4-6 it is small when.
Preferably, (Na in step 1)2O+K2O)/Al2O3For 1.1-1.3 or 1.2-1.3.
Preferably, K in step 1)2O/(Na2O+Li2O) it is 0.01-0.2 or 0.02-0.1.
Preferably, ZrO in step 1)2/CeO2For 0.8-1.5 or 1.
Preferably, TiO in step 1)2/(ZrO2+CeO2) it is 0.02-4 or 0.2-0.8.
A kind of high strength glass for display device, is prepared by preparation method of the present invention, from glass surface
The direction extended inward includes the rubidium ion switching layer in outer layer and the inside glass body in inside, and in rubidium
The potassium ion switching layer of ion exchange layer and inside glass body.
Preferably, the depth of rubidium ion switching layer is 10-20 μm, and the thickness of potassium ion switching layer is 80-100 μm, always from
The depth of sub- switching layer is more than 95 μm.
Preferably, the bearing stress of the high strength glass is 800-850Mpa, Vickers hardness for 660-680 ㎏/
mm2, 500 DEG C of heat treatment 5min change in size of gained glass are 15-30ppm, and strain point temperature is 570-590 DEG C.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention improves the intensity of glass in terms of component design and intensifying method two, is wherein played between component aobvious
The synergistic effect of work, by introducing new component CeO2And TiO2, and define the relation with contents between each component, especially limit
ZrO is determined2/CeO2And TiO2/(ZrO2+CeO2Scope, while by (Na2O+K2O)/Al2O3、K2O/(Na2O+Li2O) maintain
A certain range, improves the quantity of ion exchange and the depth of ion exchange, and by limiting TiO2、ZrO2And CeO2Three it
Between synergistic effect improve the heat endurance of glass, and the performance of ion exchange.Finally by ion exchange twice so that
Glass mechanical property greatly improves so that invention gained glass has higher bearing stress, Vickers hardness and excellent
Strain point and heat endurance, have resistance to compression, anti-scratch, anti-zoned performance, can be widely applied to the cover sheet of display device.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of preparation method of high strength glass for display device of the invention, comprises the following steps：
1) according to the following raw materials of mass percent precise：
The SiO of 54-65%2, 10-17% Al2O3, 0-0.7% Li2O, the Na of 12-16%2O, the K of 0.2-6%2O、
The B of 0.01-3%2O3, 0.1-5% MgO, 0.1-5% CaO, 0.01-3% SrO, 0.01-1.2% ZrO2、0.01-
1% CeO2, 0.01-1% SnO2And the TiO of 0.01-0.8%2；
Also, the relation between each component also meets：
(Na2O+K2O)/Al2O3For 1.1-1.4；Being capable of preferable selection range 1.1-1.3 and 1.2-1.3；
K2O/(Na2O+Li2O) it is 0.01-0.5；Being capable of preferable selection range 0.01-0.2 and 0.02-0.1；
ZrO2/CeO2For 0.5-2；Being capable of preferable selection range 0.8-1.5 and 1；
TiO2/(ZrO2+CeO2For 0.01-5；Being capable of preferable selection range 0.02-4 and 0.2-0.8.
2) above-mentioned raw materials are sufficiently mixed and be uniformly placed in platinum-rhodium alloy crucible, place into the container that refractory material is built into
In, the temperature in container is risen into T1 using Si-Mo rod, when reaction 5-10 is small after, the temperature in container is reduced to T2 insulations
60-120 minutes；Wherein, T1 is 1550-1650 DEG C, and T2 is 1500-1600 DEG C, and, T1-T2 is 50-100 DEG C；
3) glass metal in crucible is poured into rapidly in the metal form of preheating and is cooled to tabular, plate glass is placed in again
500-600 DEG C of high temperature furnace carry out annealing 4-6 it is small when；
4) cutting and the glass plate of grinding and polishing after annealing, then clean 3-5 rear liter of glass pane surface with deionized water
Temperature to keeping the temperature 1-4h at 330-380 DEG C, be placed in 430-500 DEG C of fused potassium nitrate liquid keep the temperature 4-10 it is small when；
5) take out glass plate and be cooled to 330-380 DEG C, and keep 1-4h, continue cool to room temperature afterwards, then heat to
Keep the temperature 2-6h at 340-390 DEG C, be placed in 430-500 DEG C of melting rubidium nitrate liquid keep the temperature 2-6 it is small when；It is cooled to room temperature；
Glass pane surface is cleaned again 3-5 times, up to the high strength glass of display device is used for.
A kind of high strength glass for display device of the invention, is prepared by the above method, its from glass surface to
Extend internally direction include in the rubidium ion switching layer of outer layer, the potassium in rubidium ion switching layer and inside glass body from
Sub- switching layer, wherein, the depth of rubidium ion switching layer is 10-20 μm, and the thickness of potassium ion switching layer is 80-100 μm, total ion
The depth of switching layer is more than 95 μm；The high intensity display part is 800-850Mpa with the bearing stress of glass, dimension
Family name's hardness is 660-680 ㎏/mm2, 500 DEG C of heat treatment 5min change in size of gained glass are 15-30ppm, and strain point temperature is
570-590℃。
In the present invention, SiO2Mass percentage content is 54-65%.SiO2As the main component for forming glass, content
Raising contribute to glass lightweight, the improvement of chemical resistance, the other performance of glass also will be improved.But with SiO2Contain
The increase high temperature viscosity of amount will raise, this is unfavorable for producing, so SiO2Content is set to 54-65%, and more excellent is 58-64%.
Al2O3Mass percentage content be 10-17%.The Al of high-content2O3Contribute to strain point of glass, bending strength
Improvement, the raising to the strength of glass after chemical tempering has stronger facilitation, this is because in alkali alumino-silicate glass
In glass, non-bridging oxygen and Al that alkali metal introduces3+Form aluminum-oxygen tetrahedron [AlO4], the aluminum-oxygen tetrahedron is compared with oxygen-octahedron
[SiO4] volume bigger, the gap of bigger can be produced in glass structure, and be conducive to the progress of ion exchange, finally obtaining
Learn the better product of tempering.But Al2O3It is excessive, make the easy crystallization of glass, while the melted difficulty of glass can be increased.
Na2O is that the glass carries out cementing out reality by the larger potassium ion of volume during chemical tempering (ion exchange)
The necessary component of this technique of existing chemical tempering.Network outer body is used as at the same time, it plays the role of suspension in glass structure, can
Reduce the viscosity of glass.A series of performances of glass such as chemical resistance, mechanical property etc. can be excessively caused to be deteriorated, it is too low, it can reduce
The chemical tempering effect of the glass, the tendency towards devitrification of glass can also increase, Na of the invention2The control of O mass percentage contents exists
12-16%.
Introduce K2O mainly utilizes its mixed alkali effect with Na, reaches the effect for promoting glass melting, while a certain amount of
K introducing to after chemical tempering the impact of performance improve there is certain promotion.K in the present invention2O mass percents contain
Amount is controlled in 0.2-6%, and more excellent is 1-5%；
In the present invention, (Na in glass2O+K2O)/Al2O3For 1.1-1.4；Present invention research discovery, (Na2O+K2O)/Al2O3
To influence the important parameter of chemical enhanced ion exchange depth, higher (Na is maintained2O+K2O)/Al2O3Ratio can improve subsequently
Ion exchange quantity and speed, (Na2O+K2O)/Al2O3It is preferred that 1.1-1.3, further preferred 1.2-1.3.
In the present invention, K2O/(Na2O+Li2O) be also influence ion exchange important parameter, if K2O/(Na2O+Li2O)
It is higher, then it is unfavorable for first time ion exchange (K exchanges Na), if K2O/(Na2O+Li2O it is) relatively low, then be unfavorable for second from
Son exchanges (Ru exchanges K), therefore creatively research is found the present invention, maintains K2O/(Na2O+Li2O) obtained for 0.01-0.5 pre-
Ion-exchange effect unexpectedly, K2O/(Na2O+Li2O) it is preferably 0.01-0.2, more preferably 0.02-0.1, most preferably
For 0.05, best results of ion exchange twice at this time.It is pointed out that the present invention successively carries out ion exchange twice, the
First use K exchanges Na, and second is unalterable to exchange for the first time using Ru exchange K, the twice order of ion exchange
When, large-sized K ion exchanges Na ions of the reduced size on glass body surface, therefore the concentration of K ions is in glass sheet
Body surface face is improved, and for follow-up second there is larger sized Ru to exchange the K ions provided for exchange.If
Simply swapped with K, then cannot obtain the bearing stress of higher, if simply swapped with Ru, due to Ru's and Na
Size difference is larger, it is impossible to obtains the amount of satisfied exchange.Therefore the research of the invention is found, based on step of the present invention
(the Na limited in one2O+K2O)/Al2O3And K2O/(Na2O+Li2O the specific element composition) limited, only successively carries out K
Na is changed, Ru, which changes K, could obtain significant strength character.
B2O3Effect it is more special, it can be individually created glass, B under the conditions of high temperature melting2O3It is difficult to form [BO4], can
High temperature viscosity is reduced, B has again during low temperature captures free oxygen and form [BO4] trend, structure is tended to be close, improve the low of glass
Warm viscosity, prevents the generation of crystallization.Present invention introduces a certain amount of B2O3The fusing of glass is chiefly to facilitate, mass percent contains
Amount is controlled in 0.01-3%, and more excellent is 1-2.5%.
MgO, CaO, SrO and BaO belong to alkaline earth oxide together, and are network outer bodies, and introducing is a certain amount of to be promoted
The fusing of glass.Al is only not present2O3、B2O3When oxide, Mg just enters network with [MgO4] exist.MgO, which is introduced, excessively may be used
Cause glass loose, density declines, and hardness reduces.MgO can also reduce crystallization tendency and crystallization rate, and the chemistry for improving glass is steady
Qualitative and mechanical strength.But its content should not be excessive, and no it will cause the easy crystallization of glass and the coefficient of expansion are excessive.The present invention
The content of MgO is 0.1-5%, is preferably 1-3%.
CaO is similar with the effect of MgO, and Ca plays accumulation to glass structure.CaO adjust reduce high temperature viscosity and significantly
Improve strain point of the melting behaviour of glass without reducing glass, excessive CaO can then reduce glass chemical resistance.Here, CaO
The selection of mass percentage content scope in 0.1-5%, more excellent is 0.5-2%.
SrO and BaO is respectively provided with increase glass chemical-resistant stability and improves the effect of the anti-crystallization of glass.It is but substantial amounts of
SrO and BaO can cause glass density and the coefficient of expansion to increase.SrO and BaO is with the group for being especially improved glass chemical resistance
Point, the total content of these components must be over 0.2% or higher.For improving chemical resistance requirements, the content of SrO and BaO
It is preferably as high as possible, but glass density and coefficient of expansion aspect are then wished that the content of SrO and BaO is as low as possible, therefore need
The content of SrO and BaO is controlled in certain scope.It is considered as at the same time a kind of huge sum of money for having certain toxicity based on Ba
Belong to, the present invention is substantially free of BaO, and SrO mass percentage contents are controlled in 0.01-3%, are preferably 0.5-2%, optimal is 0.8-
1.5%.In the present invention, the implication for being substantially free of BaO refers in addition to unavoidable impurity state BaO, not be introduced separately into
BaO。
ZrO2The chemical stability of glass can be effectively improved, reduce glass expansion coefficient and significantly improves the bullet of glass
Property modulus, ZrO2Also advantageously improve the performance in terms of acid resistance, elasticity, bending strength and the thermal expansion of glass.But due to
Its solubility in glass is small, can increase the high temperature viscosity of glass and improve glass liquidus temperature, the crystallization of glass is inclined
To increase.Zirconium oxide mass percentage content control of the present invention is in 0.01-1.2%, or is substantially free of zirconium oxide.
CeO2As the fining agent and decolorising agent of glass metal, make glass bright and clean, transparent, glass can be made under intense radiation irradiation
It is non-discolouring.But its is expensive, introduction volume is determined as 0.01-1%, preferably 0.01~0.2%.
It is a discovery of the invention that the CeO that addition is certain2Meeting and ZrO2Act synergistically, improve chemical stability and reduce
The coefficient of expansion, this is probably to form stable Ce-Zr solid solution, improves glass properties.The proportionate relationship of the two needs to tie up
Certain region is held, is otherwise difficult to play synergy.In the present invention, ZrO2/CeO2It is preferably 0.8-1.5 for 0.5-2, it is optimal
Elect 1 as, at this time best results.
SnO2It is the fining agent that the present invention uses, is substantially free of arsenic and antimony, SnO2Content be 0.01-1%；It is substantially free of
The implication of arsenic and antimony refers in addition to the arsenic and antimony of unavoidable impurity state, not be introduced separately into arsenic and antimony.
TiO2Ion-exchange performance with raising glass, improves the effect of the mechanical strength of glass substrate.Work as TiO2Content
When excessively more than 1%, glass devitrification resistance is deteriorated.Therefore, its content is defined to 0.01-0.8%, is preferably 0.01-
0.2%.
The present invention is found surprisingly that, maintains ZrO2/CeO2In a certain range, ZrO2And CeO2Between interaction, glass
Chemical stability be significantly improved, and CeO2Fining agent is used as at the same time, itself and SnO2Compounding also achieves significant clarification effect
Fruit, and balance to a certain extent due to introducing TiO2The technical barrier that caused devitrification resistance is deteriorated.In the present invention,
TiO2/(ZrO2+CeO2) it is 0.01-5, it is preferably 0.02-4, more preferably 0.2-0.8.
Specifically, the preparation process of 1-3 of the embodiment of the present invention is：
1) dispensing is carried out according to the constituent mass percentage shown in table 1, every part of material degree is 100%, weight
1000g；
2) above-mentioned raw materials are sufficiently mixed and be uniformly placed in platinum-rhodium alloy crucible, place into the container that refractory material is built into
In, the temperature in container is risen to 1550-1650 DEG C using Si-Mo rod, it is ensured that no more than 1650 DEG C, after reacting when about 5-10 is small,
Temperature in container is reduced to 1500-1600 DEG C and keeps the temperature about 60-120 minutes, it is ensured that no more than 120 minutes；And keep heating up
Temperature and cooling temperature gap are at 50-100 DEG C；
3) glass metal in crucible is poured into rapidly in the metal form of preheating after keeping the temperature and is cooled to tabular (about 100mm
× 200mm × 10mm), then be placed in 500-600 DEG C of high temperature furnace and made annealing treatment, when generally 4-6 is small；
4) sample cutting and grinding and polishing after annealing carry out glass pane surface into the thin glass plate of 50 × 50 × 1mm
When fully cleaning is placed on that insulation 1-4 is small at 330-380 DEG C for 3-5 time；Be placed in 430-500 DEG C of fused potassium nitrate liquid and protect
When warm 4-10 is small；
5) take out glass plate and be cooled to 330-380 DEG C, and keep 1-4h, continue cool to room temperature afterwards, then heat to
Keep the temperature 2-6h at 340-390 DEG C, be placed in 430-500 DEG C of melting rubidium nitrate liquid keep the temperature 2-6 it is small when；It is cooled to room temperature；
Glass pane surface is cleaned again 3-5 times, up to glass product.
Dependence test is carried out to glass product, transmitance is more than 90% after chemical tempering.Test result is as shown in table 1.
Table 1 compares for the specific embodiment 1-3 of the present invention and the data of comparative example.
As can be seen from Table 1, be compared to comparative example 1, the embodiment of the present invention 1-3 by add new component Ce and
Ti, and by constituent optimization, twice after ion exchange, caused glass product achieves significant technique effect, hard in Vickers
Degree, bearing stress, heat endurance parameter, strain point etc. are achieved than prior art significant progress.
The specific embodiment 4-7 of the present invention is as shown in table 2.
Table 2 is the data of the specific embodiment 4-7 of the present invention.
The specific embodiment 8-10 of the present invention is as shown in table 3, and its preparation method can use any side in embodiment 1-7
Method.
Table 3 is the raw material proportioning of the specific embodiment 8-10 of the present invention.
Claims (10)
- A kind of 1. preparation method of high strength glass for display device, it is characterised in that include the following steps,1) according to the following raw materials of mass percent precise：The SiO of 54-65%2, 10-17% Al2O3, 0-0.7% Li2O, the Na of 12-16%2O, the K of 0.2-6%2O、0.01- 3% B2O3, 0.1-5% MgO, 0.1-5% CaO, 0.01-3% SrO, 0.01-1.2% ZrO2, 0.01-1% CeO2, 0.01-1% SnO2And the TiO of 0.01-0.8%2；And also meet following relation between each component mass percent：(Na2O+K2O)/Al2O3For 1.1-1.4；K2O/(Na2O+Li2O) it is 0.01-0.5；ZrO2/CeO2For 0.5-2；TiO2/(ZrO2+CeO2) it is 0.01-5；2) it is melted after the raw material in step 1) is sufficiently mixed uniformly and forms glass metal；3) plate glass is prepared in glass metal and is made annealing treatment；4) cutting and the glass plate of grinding and polishing after annealing, then clean after glass pane surface to be warming up at 330-380 DEG C and keep the temperature 1-4h, be placed in 430-500 DEG C of fused potassium nitrate liquid keep the temperature 4-10 it is small when carry out primary ions exchange；5) take out the glass plate after primary ions exchange and be cooled to 330-380 DEG C, and keep the temperature 1-4h, continue cool to room afterwards Temperature, then heats at 340-390 DEG C and keeps the temperature 2-6h, be placed in 430-500 DEG C of melting rubidium nitrate liquid keep the temperature 2-6 it is small when Carry out Two-step ion-exchanging；Two-step ion-exchanging postcooling is to room temperature；Glass pane surface is cleaned again up to display device is used for High strength glass.
- A kind of 2. preparation method of high strength glass for display device according to claim 1, it is characterised in that step Rapid concretely comprising the following steps 2), is warming up to T1 after the raw material in step 1) is sufficiently mixed uniformly, when reaction 5-10 is small after obtain glass Glass liquid, then be cooled to T2 and keep the temperature 60-120 minutes；Wherein, T1 is 1550-1650 DEG C, and T2 is 1500-1600 DEG C, and, T1-T2 is 50-100℃。
- 3. a kind of preparation method of high strength glass for display device according to claim 1 or 2, its feature exist In glass metal is poured into and plate glass is cooled in template by concretely comprising the following steps for step 3), and plate glass is placed in 500- again Carried out at a temperature of 600 DEG C annealing 4-6 it is small when.
- 4. a kind of preparation method of high strength glass for display device according to claim 1 or 2, its feature exist In (Na in step 1)2O+K2O)/Al2O3For 1.1-1.3 or 1.2-1.3.
- 5. a kind of preparation method of high strength glass for display device according to claim 1 or 2, its feature exist In K in step 1)2O/(Na2O+Li2O) it is 0.01-0.2 or 0.02-0.1.
- 6. a kind of preparation method of high strength glass for display device according to claim 1 or 2, its feature exist In ZrO in step 1)2/CeO2For 0.8-1.5 or 1.
- 7. a kind of preparation method of high strength glass for display device according to claim 1 or 2, its feature exist In TiO in step 1)2/(ZrO2+CeO2) it is 0.02-4 or 0.2-0.8.
- 8. a kind of high strength glass for display device, is prepared into as the preparation method described in claim 1-7 any one Arrive, it is characterised in that include being in the rubidium ion switching layer of outer layer and in inside from the direction that glass surface extends inward Inside glass body, and the potassium ion switching layer in rubidium ion switching layer and inside glass body.
- A kind of 9. high strength glass for display device according to claim 8, it is characterised in that rubidium ion switching layer Depth be 10-20 μm, the thickness of potassium ion switching layer is 80-100 μm, and the depth of total ion exchange layer is more than 95 μm.
- A kind of 10. high strength glass for display device according to claim 8 or claim 9, it is characterised in that the height The bearing stress of Strength-Glass is 800-850Mpa, and Vickers hardness is 660-680 ㎏/mm2, the 500 DEG C of heat treatments of gained glass 5min change in size is 15-30ppm, and strain point temperature is 570-590 DEG C.
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Application publication date: 20180420 Assignee: Hunan Shaohong special glass Co.,Ltd. Assignor: CAIHONG GROUP (SHAOYANG) SPECIAL GLASS Co.,Ltd. Contract record no.: X2023980041911 Denomination of invention: A high-strength glass for display devices and its preparation method Granted publication date: 20201020 License type: Common License Record date: 20230915 |