CN110255894A - High elastic modulus Aluminiu, boron silicate glass without alkali and preparation method thereof suitable for floating process production - Google Patents

High elastic modulus Aluminiu, boron silicate glass without alkali and preparation method thereof suitable for floating process production Download PDF

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Publication number
CN110255894A
CN110255894A CN201910345119.5A CN201910345119A CN110255894A CN 110255894 A CN110255894 A CN 110255894A CN 201910345119 A CN201910345119 A CN 201910345119A CN 110255894 A CN110255894 A CN 110255894A
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glass
sio
alkali
aluminiu
oxide
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阮健
王维年
王静
韩建军
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Glass Compositions (AREA)

Abstract

The present invention relates to a kind of high elastic modulus Aluminiu, boron silicate glass without alkali and preparation method thereof suitable for floating process production.The composition of the glass presses the mole percent content meter of oxide: SiO261.0%-71.0%, Al2O37.5%-17.0%, B2O32.0%-8.0%, MgO 4%-8%, SrO 3%-6.0%, CaO 3%-6%, Y2O30%-3%, Yb2O30%-3%.The elasticity modulus of the glass is higher than 73.8GPa, and softening point is more than 860 DEG C, and glass melting temperature is between 1536.4-1690.1 DEG C, and resistivity is 21.5-71.97 Ω when annealing temperature is 650-750 DEG C, 1600 DEG C, and alkali metal oxide (Li is free of in composition2O、Na2O、K2O etc.), it can be widely applied to the glass substrate of large scale flat panel displaying element or other photoelectric devices.

Description

Suitable for floating process production high elastic modulus Aluminiu, boron silicate glass without alkali and its Preparation method
Technical field
The present invention relates to technical field of glass materials, and in particular to a kind of high elastic modulus suitable for floating process production Aluminiu, boron silicate glass without alkali and preparation method thereof.
Background technique
With the continuous development of flat panel display, Thin Film Transistor-LCD (The film transistor Liquid crystal display, TFT-LCD) technology develops towards large scale direction.TFT-LCD has operating voltage It is stabilization, energy saving, lightweight, high image quality, full color, fine definition, high-resolution, large scale, radiationless and pollution-free etc. all More advantages have become the mainstream of FPD industry.For TFT-LCD display pannel, glass substrate is to be located to show Show two pieces of important materials before and after panel, one of to be used as bottom film transistor (TFT) array substrate, another piece is used as colored filter The substrate of mating plate.Thin film transistor (TFT) and pixel electrode are mainly made in array substrate, colored filter substrate mainly makes color The filter plate of display pours between two substrates after liquid crystal molecule to be powered and realizes display effect.
Key basic material of the glass substrate as TFT-LCD mainly has both sides to act on: first is that liquid crystal molecule is allowed to protect Certain thickness is held, second is that carrying drives necessary transparent electrode and switch element.Currently, the common size of glass substrate is Through from past 8.5th generation (2200mm × 2400mm, be mainly used for cut 55 inches of TFT-LCD panels below), the 9th generation (2400mm × 2800mm) develop to the 10th generation (3000mm × 3000mm, 2880mm × 3130mm), the 10.5th generation (2940mm × 3370mm is mainly used for the TFT-LCD panel of cutting 65 inches or more) and (2940mm × 3370 were mainly used for cutting the 11st generation Cut 75 inches or more of TFT-LCD panel), or even develop to larger size.The trend gesture that display panel develops towards large scale Must size to glass substrate more stringent requirements are proposed, not only to meet the quality requirements of liquid crystal glass base, also to meet The performance indexes that panel preparation process is proposed, such as alkali (K2O、Na2O) content lower than 2000ppm, high rigidity (>= 630kgf/mm2), high elastic modulus (>=65GPa), good chemical stability, high strain-point (>=650 DEG C), be suitable for heat it is swollen Swollen coefficient (with the percent thermal shrinkages of peripheral devices less than 20%), low-density and bubble-free, crackle and defect etc..
Based on the above performance requirement, TFT-LCD glass substrate is generally Aluminiu, boron silicate glass without alkali, oxide composition Generally comprise SiO2、Al2O3、B2O3, MgO, SrO, CaO, it is also possible to Y is added2O3、Yb2O3Etc. other rare earth oxides, generally with Quartz sand, aluminium oxide, boric acid, light magnesium oxide, strontium carbonate, calcium carbonate, yttrium oxide, ytterbium oxide are raw material.In order to make alkali-free aluminium It is easy to clarification and homogenization under borosilicate glass high temperature, needs that gas can be released containing some heated decomposition in glass formula Raw material, therefore its composition in alkaline earth oxide CaO and SrO respectively by CaCO3And SrCO3It introduces.In addition, in order to subtract The volatilization of small boron, B2O3With H3BO3Form introduce, while additionally supplement 15% (mass fraction meter) B2O3Corresponding raw material. To guarantee glass smelting effect, also need to guarantee the uniform enough melted, clarifications of mixing, homogenising time and suitable annealing temperature Degree, annealing time.
SiO2、Al2O3、B2O3The basic skeleton structure of glass is constituted as Aluminiu, boron silicate glass without alkali Network former, The addition of alkaline earth oxide (MgO, CaO, SrO) and suitable mol ratio can reduce the height of Aluminiu, boron silicate glass without alkali Warm viscosity, is conducive to glass smelting and Quick-forming.Alkaline earth oxide is present in glass knot as Network modifier ion In structure gap, so that glass is finer and close, the contiguity of key is stronger, improves the springform of glass to a certain extent Amount, hardness, chemical stability, strain point etc..Rare earth oxide have stronger Ion field strength and polarizability, in some cases plus Enter and more easily connected with anionic group, improve the contiguity of key while improving elasticity modulus, hardness, the chemical stabilization of glass Property, strain point etc., meanwhile, rare earth ion and boron anion group combine the volatile quantity that can reduce boron again to a certain extent.
Elasticity modulus is an important performance indexes of Thin Film Transistor-LCD glass substrate.With glass substrate Towards enlargement, lightening trend development, there is the problems such as sagging, rake angle caused by self weight, glass in sized rectangular glass substrate Multiple processing links such as annealed, processing, inspection, cleaning, carrying are also needed after forming, the sagging glass that will seriously affect is above-mentioned The operation such as loading, taking-up, separation, carrying in the process, it is serious to perplex large size panel manufacturer.In support large-size glass base When the both ends of plate, it may appear that intermediate sagging influences the yield of production efficiency and panel.The maximum sag of chain and its bullet of glass Property modulus have a direct relation, therefore produce large-sized glass substrate and must have elasticity modulus as high as possible.
Consult open source literature and technical data discovery, the EAGLE XG slim that U.S. CORNING limited liability company releases Glass LCD glass substrate Young's modulus is 73.6GPa, minimum weightless in the NaOH solution that mass fraction is 5% Compare 1.83mg/cm2, and Vickers hardness is 640kgf/mm2.Chinese patent CN101400614A discloses a kind of with steady compared with high fever The glass composition and preparation method thereof of qualitative and chemical stability is added to BaO, Sb in composition2O3、As2O3Equal heavy metals Oxide and noxious material, also added ZrO2、SnO2And La2O3Component, the glass are prepared suitable for press over system.Chinese patent CN101801872 A discloses a kind of glass composition and production and preparation method thereof of suitable glass tube down-drawing, in glass composition Contain BaO, TiO2、MnO、ZnO、Nb2O5、MoO3、Ta2O5Equal substances, and be illustrated for down draw process performance.China Patent CN101544467A discloses a kind of liquid crystal glass base raw material and preparation method thereof, containing ZnO and adds in composition BaO, Ba (NO3)2Deng to the disagreeableness component of environment.Chinese patent CN104276755A discloses a kind of high chemical durability Aluminiu, boron silicate glass without alkali, composition in be added to ZnO, ZrO2、CdO、SnO2Substance.Chinese patent CN102892723 A A kind of lithium alumina silicate glass and preparation method with high elastic modulus is disclosed, is added to Li in composition2O、Na2O、 K2O、ZnO、ZrO2、P2O5、Fe2O3、SnO2Equal substances.Chinese patent CN 1262503C discloses a kind of alkali-free aluminoborosilicate Glass and application thereof, composition in be added to BaO and ZnO, wherein BaO can cause damages to environment.Chinese patent CN 101117270B discloses aluminium borosilicate glass and its application of a kind of high elastic modulus, in the composition of the glass containing BaO, ZnO、ZrO2、La2O3、As2O3、Sb2O3、SnO2、R2O (R=Li, Na, K), wherein BaO is to environment nocuousness, As2O3For violent in toxicity Matter, the alkali metal ion Li in composition+、Na+And K+It is easy to pollute panel production.Chinese patent CN 108911501A is public A kind of high rigidity Aluminiu, boron silicate glass without alkali and preparation method thereof suitable for floating process production, application, composition are opened In without addition rare earth oxide Y2O3And Yb2O3Cause the glass properties not excellent enough.
Summary of the invention
The purpose of the present invention is to provide a kind of high elastic modulus alkali-free aluminoborosilicates suitable for floating process production Glass is formed are as follows: SiO with what oxide molar relative content was counted261.0%-71.0%, Al2O37.5%-17.0%, B2O32.0%-8.0%, MgO 4.0%-8.0%, SrO 3.0%-6.0%, CaO 3.0%-6.0%, Y2O30%-3%, Yb2O30%-3% adds up to 100%.
Further, SiO2Mole percent content be preferably 61.0%-66.0%, i.e. 61.0%≤SiO2≤ 66.0%.
Further, Al2O3Mole percent content be preferably 10.0%-17.0%, i.e. 10.0%≤Al2O3≤ 17.0%.
Further, SiO2With Y2O3Or SiO2With Yb2O3The sum of mole percent content 61.0%-74.0% it Between, i.e., 61%≤(SiO2+Y2O3)≤74.0% or 61%≤(SiO2+Yb2O3)≤74.0%.
Further, the ratio between mole percent content of MgO, CaO, SrO three is 4:3:3.
Further, the SiO in the high elastic modulus Aluminiu, boron silicate glass without alkali2、Al2O3、B2O3、MgO、CaO、 SrO、Y2O3、Yb2O3Ingredient passes through pure quartz sand, aluminium oxide, boric acid, light magnesium oxide, calcium carbonate, strontium carbonate, oxidation respectively Yttrium, ytterbium oxide raw material form introduce, B in component2O3Corresponding raw material (i.e. boric acid) needs excess 15wt%, to reduce boron The influence volatilized to glass.
Further, the glass melting temperature of the glass is 1536.4-1690.1 DEG C, and melting time is 2-4 hours, liquidus curve temperature Resistivity is 21.5-71.97 Ω when degree is 1054-1120 DEG C, 1600 DEG C, and annealing temperature is 650-750 DEG C, and softening temperature exists 860 DEG C or more, elasticity modulus 73.8-90.9GPa.The glass weightless ratio in the HF solution that volume fraction is 10% is 2.54-8.42mg/cm2, weightless ratio is 0.70-1.89mg/cm in the NaOH solution that mass fraction is 5%2。
The preparation method of above-mentioned high elastic modulus Aluminiu, boron silicate glass without alkali, comprising the following steps: prepare according to formula Raw material simultaneously mixes, and by mixed material heating to 1620-1660 DEG C of heat preservation 2-4h, then pours into the glass metal of melting and is preheated to 200- 300 DEG C of die for molding is then placed at 650-720 DEG C the 2-4h that anneals, finally with furnace natural cooling.
In order to which this high elastic modulus Aluminiu, boron silicate glass without alkali is made, the present invention mainly takes following measures: first First pass through SiO in control glass ingredient2And Al2O3Content, while adding boron oxide, alkaline earth oxide or rare earth metal Oxide reduces the high temperature viscosity and glass melting temperature of glass, so that there is glass the warm-natured degree of suitable material to be convenient for Quick-forming； Secondly the technological parameter (such as glass melting temperature, melting time, annealing temperature, annealing time) in strict control production process, it is excellent Change the performance indicator of glass；Third is added to the alkaline earth oxide or rare-earth oxide of suitable proportion, these additions Object is present in the interstitial site of Aluminiu, boron silicate glass without alkali structure in the form of Network modifier, improves the fine and close journey of glass Degree, to improve significantly to the elasticity modulus of glass tool and humidification.
Experiment and testing result show that the glass melting temperature of the glass is 1536.4-1690.1 DEG C, and melting time is that 2-4 is small When, resistivity is 21.5-71.97 Ω when liquidus temperature is 1054-1120 DEG C, 1600 DEG C, and annealing temperature is 650-750 DEG C, Softening temperature is at 860 DEG C or more, elasticity modulus 73.8-90.9GPa.The glass loses in the HF solution that volume fraction is 10% Again than for 2.54-8.42mg/cm2, weightless ratio is 0.70-1.89mg/cm in the NaOH solution that mass fraction is 5%2.These Statistics indicate that the glass comprehensive performance is very excellent, it can be used in the large scale for making LCD panel of thin-film transistor Glass substrate.
Specific embodiment
To make those of ordinary skill in the art fully understand technical solution of the present invention and beneficial effect, below in conjunction with specific Embodiment is further described.
In Aluminiu, boron silicate glass without alkali system, SiO2It is the major networks formation body of glass, constitutes the basic of glass Skeleton.Properly increase SiO2Glass acid resistance, strain point, 1600 DEG C of high-temperature resistivities, but excessive raising can be improved in content SiO2Content can reduce elasticity modulus, Vickers hardness, dielectric constant and the alkali resistance of glass, also will increase the thermal expansion of glass Coefficient and glass melting temperature, therefore its content has a suitable range.SiO in glass provided by the invention2Content in 61%- 71% (molar percent, not specified then identical below), if its acid resistance can be made to be deteriorated lower than 61%, is weightless than increasing Greatly, strain point reduces.Many experiments comparing result shows, SiO2Content it is best below 61% or more 66%.
Al2O3The crystallization tendency that glass can be reduced, improves chemical stability, thermal stability, mechanical strength, the hardness of glass And refractive index.Properly increase Al2O3Content can improve the acid resistance of glass, reduce the thermal expansion coefficient of glass, increase 1600 DEG C High-temperature resistivity improves the strain point temperature and elasticity modulus of glass.Furthermore Al2O3With highest unit volume dissociation energy and Higher bulk density increases Al2O3Content be conducive to improve glass elasticity modulus, but excessively improve Al2O3Content meeting Glass infusibility, alkali resistance is caused to deteriorate, thermal stability decline, dielectric constant reduction.The Al that the present invention preferably goes out2O3Content exists 7.5%-17%, more preferably in 10%-17%.
B2O3Network former oxide is also belonged to, the thermal expansion coefficient of glass can be reduced, improves the thermal stability of glass And chemical stability.The excessively high meeting of boron content in glass ingredient causes glass ingredient design deviation occur so that the volatilization of boron is serious. It can reduce deviation by the content that control introduces type of feed and additional boron make-up.Excessively high boron can make to be formed in glass structure Excessive [BO3] triangle body, cause thermal expansion coefficient to increase, boron abnormal phenomena occurs, therefore control B2O3Content is less than or equal to 8%.The too low meeting of boron content is so that glass infusibility and clarifying effect are deteriorated, therefore B2O3Content lower limit is controlled 2%.
The high temperature viscosity and glass melting temperature of glass can be effectively reduced in alkaline earth oxide MgO, CaO and SrO, shortens glass The material of glass, is conducive to Quick-forming, these ingredients belong to network outer body.The content of MgO is in 4.0%-8.0%；MgO is replaced Part CaO can make it is glass hardening slow, expecting property it is elongated, improve the forming property of glass；MgO can also reduce glass Crystallization tendency and crystallization rate, improve the chemical stability and mechanical strength of glass.The content of CaO is in 3.0%-6.0%, CaO Main function is stabilizer in glass, will increase the chemical stability and mechanical strength of glass, but the higher devitrification of glass of content Tendency increases, and the brittleness of glass is caused to increase.Mg2+And Ca2+The radius of ion is smaller, and charge is higher, polarizability is stronger, because And the elasticity modulus of glass substrate is influenced very big.The content of SrO contains in 3.0%-6.0%, SrO molecular weight with higher The more density that will increase glass is measured, the elasticity modulus of glass can be also reduced.
Rare earth oxide RE (Y2O3、Yb2O3) in Aluminiu, boron silicate glass without alkali system mainly with the shape of network outer body Formula participates in glass structure, Y2O3、Yb2O3Within 3%, adding suitable single rare earth oxide can improve for control The alkali resistance of glass improves hardness, the strain point of glass, reduces high temperature viscosity and fusion temperature.Wherein single Y2O3Or Yb2O3 The elasticity modulus of glass can be significantly improved, and the fusion temperature of glass can be reduced；Two or more rare-earth oxidations are added in mixing Object will will appear " mischmetal effect ", decline performance.The too high levels of rare earth oxide, it will make glass network structure solution Poly-, high temperature viscosity is too low, material property is too long, is unfavorable for forming of glass；On the other hand adding excessive rare earth oxide will increase glass The density of glass also will increase the production cost of glass.
The preparation method of the high elastic modulus Aluminiu, boron silicate glass without alkali is specific as follows:
1) raw material introduces
Ingredient: SiO is carried out according to following mole percent content261.0%-71.0%, Al2O37.5%-17.0%, B2O32.0%-8.0%, MgO 4.0%-8.0%, SrO 3.0%-6.0%, CaO 3.0%-6.0%, Y2O30%-3%, Yb2O30%-3%.The sum of each oxide is 100%, wherein SiO2、Al2O3、B2O3、MgO、CaO、SrO、Y2O3、Yb2O3Respectively By analyzing pure quartz sand, aluminium oxide, boric acid (excessive 15wt%), light magnesium oxide, calcium carbonate, strontium carbonate, yttrium oxide and oxygen The raw material form for changing ytterbium introduces.
2) it forms
Referring to above-mentioned molar percentage, according to the dosage for amounting to 150g glass, quality needed for calculating each raw material.It will be each A raw material is uniformly mixed and is placed in platinum-rhodium alloy crucible, divides 2-3 completion to feed at 1500 DEG C (charge temperatures), then heats up To 1620-1660 DEG C of heat preservation 2-4h.The glass metal melted is poured into the cast iron die for be preheated to 200-300 DEG C and is formed, 700 DEG C or so annealing 2-4h.Finally with furnace cooled to room temperature, to eliminate stress present in glass, obtain high elastic modulus without Alkali aluminium borosilicate glass sample.
According to the method described above, certain raw material dosages are had studied to the shadow of high elastic modulus Aluminiu, boron silicate glass without alkali performance It rings, specific embodiment is as follows.The present invention can also be there are many other embodiments, it is not limited to which listed below is limited several Embodiment.
1. not adding Y2O3、Yb2O3Under the premise of, keep Al2O3(11.0%) and B2O3(8.0%) content is constant, carries out 6 groups of experiments.As a result, it has been found that with SiO2/ RO (RO=MgO, CaO, SrO) ratio reduces, the bullet of Aluminiu, boron silicate glass without alkali Property modulus increases to 82.5GPa from 73.8GPa, and the performances such as hardness, alkali resistance are also improved, and concrete outcome is as shown in table 1.
1 Al of table2O3、B2O3Glass properties table in the constant situation of content
2. not adding Y2O3、Yb2O3Under the premise of, keep SiO2(65.0%) and B2O3(8.0%) content is constant, carries out 7 groups of experiments.As a result, it has been found that with Al2O3/ RO ratio reduces, and the elasticity modulus of Aluminiu, boron silicate glass without alkali increases from 78.6GPa 81.4GPa is arrived greatly, and other performance is also improved, and concrete outcome is as shown in table 2.
2 SiO of table2、B2O3Glass properties table in the constant situation of content
3. not adding Y2O3、Yb2O3Under the premise of, keep SiO2(65.0%) and B2O3(6.0%) content is constant, carries out 7 groups of experiments.As a result, it has been found that gradually replacing Al with RO2O3, the elasticity modulus of Aluminiu, boron silicate glass without alkali increases from 80.4GPa To 82.6GPa, concrete outcome is as shown in table 3.
3 SiO of table2、B2O3Glass properties table in the constant situation of content
4. in addition Y2O3Or Yb2O3Under the premise of, keep MgO (6.40%), SrO (4.80%), CaO (4.80%) to contain It measures constant, changes other raw material dosages, carried out 5 groups of experiments.As a result, it has been found that single addition rare earth oxide, it can be in certain journey Improve the elasticity modulus of glass on degree, concrete outcome is as shown in table 4.
Table 4 adds Y2O3Or Yb2O3And glass properties table in the constant situation of MgO, SrO, CaO content
The result of consolidated statement 1-4 it is found that Aluminiu, boron silicate glass without alkali provided by the invention elasticity modulus with higher, Reach 73.8GPa or more；Softening temperature is at 860 DEG C or more, and glass melting temperature is at 1536.4-1690.1 DEG C, and annealing temperature is in 650- 750℃.The Aluminiu, boron silicate glass without alkali can be used for Thin Film Transistor-LCD (TFT-LCD) glass substrate, and be applicable in It is produced in floating process.
Subordinate list explanation
1) "-" indicates that this index is not surveyed in table.
2) density p [g/cm of glass sample3] measured using Archimedes's drainage, elasticity modulus [GPa] uses sound wave Method measurement measures Vickers hardness [kgf/m using full-automatic microhardness instrument2].The glass sample that six faces polish is respectively placed in 20min is corroded in water-bath at 20 DEG C in the HF solution that volume fraction is 10%, and in the NaOH solution that mass fraction is 5% 6h is corroded in water-bath at 95 DEG C, to complete the chemical resistance test of glass.Dielectric constant [F/m] is surveyed using impedance analyzer It is fixed, and thermal expansion coefficient (25-300 DEG C of temperature range, unit 10-7/ K), strain point and expansion softening point using horizontal expander instrument survey Fixed, fusion temperature is calculated after being tested by viscosimeter.TwOperating point temperature corresponding viscosity 104DPas [DEG C], TsSoftening point temperature Spend corresponding viscosity 107.6dPa·s[℃]。

Claims (8)

1. it is a kind of suitable for floating process production high elastic modulus Aluminiu, boron silicate glass without alkali, it is characterised in that the glass with The composition of oxide molar relative content meter are as follows: SiO261.0%-71.0%, Al2O37.5%-17.0%, B2O32.0%- 8.0%, MgO 4.0%-8.0%, SrO 3.0%-6.0%, CaO 3.0%-6.0%, Y2O30%-3%, Yb2O30%- 3%, add up to 100%.
2. glass as described in claim 1, it is characterised in that: SiO2Mole percent content be 61.0%-66.0%.
3. glass as described in claim 1, it is characterised in that: Al2O3Mole percent content be 10.0%-17.0%.
4. glass as described in claim 1, it is characterised in that: SiO2With Y2O3Or SiO2With Yb2O3Mole percent content The sum of between 61.0%-74.0%.
5. glass as described in claim 1, it is characterised in that: the ratio between mole percent content of MgO, CaO, SrO three is 4:3:3。
6. glass as described in claim 1, it is characterised in that: the SiO in the glass2、Al2O3、B2O3、MgO、CaO、SrO、 Y2O3、Yb2O3Ingredient passes through pure quartz sand, aluminium oxide, boric acid, light magnesium oxide, calcium carbonate, strontium carbonate, yttrium oxide, oxygen respectively The form for changing ytterbium raw material introduces, B in component2O3Corresponding raw material needs excess 15wt%.
7. glass as described in claim 1, it is characterised in that: the glass melting temperature of the glass is 1536.4-1690.1 DEG C, is melted Time is 2-4 hours, and resistivity is 21.5-71.97 Ω when liquidus temperature is 1054-1120 DEG C, 1600 DEG C, and annealing temperature is 650-750 DEG C, softening temperature is at 860 DEG C or more, elasticity modulus 73.8-90.9GPa.The glass is 10% in volume fraction It is weightless than being 2.54-8.42mg/cm in HF solution2, weightless ratio is 0.70- in the NaOH solution that mass fraction is 5% 1.89mg/cm2。
8. the preparation method of any one of the claim 1-7 high elastic modulus Aluminiu, boron silicate glass without alkali, it is characterised in that The following steps are included: preparing raw material according to formula and mixing, then mixed material heating to 1620-1660 DEG C of heat preservation 2-4h will The glass metal of melting, which pours into, is preheated to 200-300 DEG C of die for molding, is then placed at 650-720 DEG C the 2-4h that anneals, finally With furnace natural cooling.
CN201910345119.5A 2019-04-26 2019-04-26 High elastic modulus Aluminiu, boron silicate glass without alkali and preparation method thereof suitable for floating process production Pending CN110255894A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114716143A (en) * 2022-04-13 2022-07-08 青岛融合装备科技有限公司 Alkali-free boroaluminosilicate glass for liquid crystal glass substrate
CN116177874A (en) * 2022-12-09 2023-05-30 耀华(秦皇岛)玻璃技术开发有限公司 Boron aluminum silicon series photo-thermal glass and production and processing technology thereof

Citations (3)

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Application publication date: 20190920