CN109704574A - A kind of light-high-strength electric substrate glass and preparation method - Google Patents
A kind of light-high-strength electric substrate glass and preparation method Download PDFInfo
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Abstract
The present invention discloses a kind of light-high-strength electric substrate glass and preparation method, and electric substrate glass prepared by the present invention has lesser density and greater hardness, and has suitable thermal expansion coefficient and good dielectric properties；Preparation method of the present invention reduces glass smelting temperature by increasing boron oxide content, improves melting efficiency, viscosity is low when glass forms, forming temperature is wide in range, and processability is good, high production efficiency, energy conservation and environmental protection is suitable for low cost and produces in enormous quantities, and added value of product is high.
Description
Technical field
The invention belongs to field of glass production technology, it is related to a kind of light-high-strength electric substrate glass and preparation method.
Background technique
With the development of liquid crystal display device and universal, more and more people use laptop, the large size of television set
Change trend is also increasing the weight of entire liquid crystal display, large scale screen development trend under, base plate glass also to
Enlargement, slimming development other than reducing the thickness of glass substrate, also need to reduce to reduce the weight of whole display
The density of glass.Simultaneously in the manufacturing process of display, glass mother splits into the process of display substrate and making for display
With environment, require that base plate glass has very high intensity.
In addition base plate glass is also mainly used in mobile device, and the thinner touch screen products the lighter, and user carries Vietnamese side
Just, many manufacturers are also in the thinning for constantly improving preparation process and glass.But these require to expend a large amount of energy progress
Working process.And in the process of base plate glass, base plate glass be it is horizontal positioned, glass is in self gravitation effect
Under, have a degree of sagging and rake angle, sagging degree is directly proportional to the density of glass itself, with the Young's modulus of glass at
Inverse ratio.Meanwhile it being also required to reduce transportation cost in the carrying of glass and in order to reduce the total weight of display reduces glass
Sag should keep low-level for the total weight of the imagescope of large-size screen monitors curtain structure, due to substrate glass thickness be only 0.3mm~
0.7mm will lead to strength reduction because thickness is thinned, also just high for the intensity requirement of so ultra-thin glass, therefore answer
Base plate glass is set to have alap density and Young's modulus as high as possible.Generally require density≤2.5g/ of base plate glass
cm3, elasticity modulus >=70GPa of base plate glass, hardness is greater than 690MPa.
Al in aluminium Pyrex system other than silica, as network intermediate2O3Have to the mechanical strength of glass
It is direct to influence, but will increase the viscosity of glass, it is unfavorable for the fusing of glass.B as Network former2O3Density is smaller,
With the increase of boron oxide content, glass density can be reduced, reduces and melts difficulty, and be conducive to the electrical property of base plate glass.
The thermal stability, endurance and mechanical strength that glass can also be improved reduce thermal expansion coefficient, viscosity and the tendency towards devitrification of glass.
Chinese patent application CN104211299A provides a kind of low-density and high-strength touch screen cover-plate glass, above-mentioned glass
The mass percent of each constituent is respectively in the formula of glass: SiO2: 58~68%, Al2O3: 14~18%, Li2O:2~
4%, Na2O:12~15%, B2O3: 4~7%.It is easier to melt when the glass high temperature, glass can be fused at a lower temperature
Liquid reduces the pollution to environment to reduce the consumption of fuel etc.；Product has lower density, and density is lower than
2.395g/cm；After chemical tempering, impact strength with higher, bearing stress can reach 800MPa or more, Er Qienai
It scrapes scratch-resistant, is entirely capable of reaching the service performance requirement of product.But the requirement of base plate glass is more much higher than cover-plate glass.As
Base plate glass, thermal expansion, corrosion-resistant and electrical property etc. must all reach requirement, and due to Na+Production line can be polluted, so
Base plate glass formula is silicate glass containing boron and aluminium without alkali at present.
Chinese patent application CN105384335A provides a kind of alkali-free glass low with high-intensitive, high-temperature heat expansion coefficient
The preparation method of glass.The glass be suitble to middle-size and small-size LED, OLED, particularly mobile terminal, digital camera, mobile phone etc. just
It takes in the field of formula display and uses.But its glass melting temperature has reached 1700 DEG C, and excessively high melting temperature not only increases production
Cost, and increase and melt difficulty, it is also huge challenge for traditional refractory material and molding equipment.
Chinese patent application CN1673140B has invented a kind of glass for display substrate, is characterized by SiO2-A12O3-
B2O3The composition of-RO (RO is more than one of MgO, CaO, BaO, SrO and ZnO) system, is equivalent to 10-5The temperature of pool is 1570C
More than, alkali content is 0.01~0.2% by mass percentage, ZrO content is 0.01%~0.3%.In addition there is SiO2-
A12O3-B2O3The composition of-RO (RO is more than one of MgO, CaO, BaO, SrO and ZnO) system, density in 2.5g/cm hereinafter,
30~380 DEG C of temperature range mean thermal expansion coefficients are 25~36 × 10-7/ DEG C, strain point is 640 DEG C or more, by quality hundred
Dividing than alkali content is 0.01~0.2%, ZrO2Content is less than 0.01~0.4%.
A kind of low thermal expansion high strength TFT-LCD panel substrate glass of Chinese patent application CN107311451A disclosure of the invention
Glass, it is characterised in that: the group of the base plate glass component is grouped as and weight percent are as follows: SiO2: 60~67%, Na2O:12~
14%, K2O:2~5%, CaO:0.2~0.5%, Li2O:5~11%, MgO:3~5%, A12O3: 14~17%, CeO2: 0.1
~0.3%, SnO2: 0.1~1%, ZrO2: 0.5~2%, TiO2: 0.2~0.8%, Cr2O3: 0.2~2%.By traditional height
Warm fusion process and solid-phase synthesis combine to prepare micro- product glass material, and simple process, stability are high, production cost is low,
It is suitble to industrialized mass production, thermal expansion coefficient 2.1~4.0 × 10 can be prepared using inventive formulation and preparation process-6/
DEG C, 150~210MPa of bending strength, and dielectric properties are good, the reliable low thermal expansion high strength microcrystal glass material of insulation, meet
The requirement of electronic package substrate material.But glass composition contains Na, K alkali metal, in process of production Na under high temperature+Diffusion makes
Its deterioration in characteristics.
Chinese patent application CN108863107A, which has invented a kind of alkali metal and is not easy shield, to be scattered to glass pane surface, is able to suppress
The excellent glass plate of the decline of the characteristic of transparent conductive oxides film.Since manufacturing cost is cheap, soda-lime glass etc. contains
The alkali-containing glass substrate of alkali metal oxide is also widely used.Using alkali-containing glass substrate, in order to keep alkali golden
The diffusion of category minimizes, and needs to form silicon oxide film, pellumina, zirconium oxide film, silica and tin oxide on the glass substrate
The Alkali-barrier layers such as mixed oxide films, and transparent conductive oxides film is formed in the Alkali-barrier layer.But
Increase process and inevitably result in increased costs, yield rate reduces.So in actual production or not contain the alkali-free of alkali metal
Based on glass substrate.
For large-scale, thin glass substrate, the flexure caused by being self-possessed is as the big problem in manufacturing process greatly.By glass
The deflection that the self weight of substrate generates, it is directly proportional to the density of glass.The variation that square is inversely proportional of the deflection of glass and plate thickness,
So very big by thickening the effect that plate thickness keeps flexure reduced.Because the density for reducing glass has very the lightweight of glass
Big effect, while reducing density and can also reduce transportation cost.It is enlarged, lightening with base plate glass, glass it is strong
Degree will improve therewith.Nearly all contain alkali metal oxide in above-mentioned glass ingredient, but since electric substrate glass is being processed
Alkali metal ion can pollute producing line in the process, so recipe requirements do not contain alkali metal oxide as far as possible.
Summary of the invention
To overcome above-mentioned the deficiencies in the prior art, it is an object of the present invention to provide a kind of light-high-strength electric substrate glass and
Preparation method, the electric substrate glass density of preparation is low, melting efficiency is high, thermal expansion coefficient is low, high mechanical strength.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of light-high-strength electric substrate glass, formula is by mole including following raw material components: 65.5~
68% quartz sand, 8.8~12.5% boric anhydride, 10.5~11.5% aluminium oxide, 2.1~2.3% magnesia, 8.4~
8.8% calcium oxide, 0.50~0.55% strontium oxide strontia, 0.07% tin oxide.
A kind of preparation method of light-high-strength electric substrate glass, comprising the following steps:
Step 1) weighs raw material according to feed molar percentage；
The raw material of weighing is sequentially placed into batch mixer by step 2), is uniformly mixed and is formed batch；
Batch addition is warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 15~30min
1650~1680 DEG C and 2h is kept the temperature, furnace temperature is cooled to 1400~1420 DEG C from 1650~1680 DEG C by 30min and to glass
Liquid stirs 5min, finally, being warming up to 1650~1680 DEG C by 15~30min again and keeping the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1650~1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 5~8mm are formed；
The glass of forming is put into 700~730 DEG C of annealing furnaces by step 6), keeps the temperature 30~60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min, obtains light-high-strength through cutting and polishing
Electric substrate glass.
Further, in the step 5), mould therefor material uses stainless steel, graphite or copper.
Further, in the step 2), by the raw material of weighing mix to the uniformity be greater than 99% after form batch.
Light-high-strength electric substrate glass, density are 2.377~2.407g/cm3, hardness is 699~722MPa, in addition
The dielectric loss for measuring glass sample is 1.72 × 10-3~1.81 × 10-3, thermalexpansioncoefficientα is 31.87 × 10-7~37.35
×10-7。
Compared with prior art, the invention has the following beneficial technical effects:
Electric substrate glass prepared by the present invention has lesser density and greater hardness, and has suitable heat swollen
Swollen coefficient and good dielectric properties；Preparation method of the present invention reduces glass smelting temperature by increasing boron oxide content, mentions
High melting efficiency, viscosity is low when glass forms, and forming temperature is wide in range, and processability is good, high production efficiency, energy conservation and environmental protection, fits
Produce in enormous quantities in low cost, added value of product is high.
The present invention not only has the characteristics that light-high-strength, while also meeting glass transmission rate, resistivity, expansion system
Number, the performance requirements such as mechanical strength and dielectric properties.The glass production is high-efficient, energy conservation and environmental protection, and it is large quantities of to be suitable for low cost
Amount production, added value of product is high, overflow can be used under lower forming temperature, under drawing, the methods of float glass process is produced.It is applicable in
In mobile phone, smart phone, tablet computer, laptop, television set, wrist-watch, the protection glass of the devices such as industrial display
Glass and protective window, automotive window, train vehicle window, aviation machine window and hard disk substrate, may be simultaneously used for white domestic appliances,
On such as refrigerator and kitchen tools.Therefore, there is considerable economy and society with light-high-strength electric substrate glass prepared by this method
Meeting benefit, application prospect are very wide.
Detailed description of the invention
Fig. 1 is the variation diagram with the density hardness of boron oxide content glass.
Specific embodiment
Present invention is further described in detail combined with specific embodiments below, but not as a limitation of the invention.
Embodiment 1:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 68.0%, 8.8% boric anhydride,
11.40% aluminium oxide, 2.3% magnesia, 8.79% calcium oxide, 0.55% strontium oxide strontia, 0.07% tin oxide；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 15min
1650 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1420 DEG C from 1650 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1420 DEG C in whipping process；Then 1650 DEG C are warming up to by 15min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1650 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of stainless steel mould, and the blocky glass with a thickness of 5mm is formed
Glass；
The glass of forming is put into 700 DEG C of annealing furnaces by step 6), keeps the temperature 30min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.394g/cm3, hardness 710MPa, the dielectric loss in addition measuring glass sample is
1.81×10-3, thermalexpansioncoefficientα is 31.87 × 10-7。
Embodiment 2:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 67.59%, 9.84% boron
Acid anhydride, 11.06% aluminium oxide, 2.25% magnesia, 8.65% calcium oxide, 0.54% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 20min
1660 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1420 DEG C from 1660 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1420 DEG C in whipping process；Then 1660 DEG C are warming up to by 20min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1660 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in the mold of 600 DEG C of graphite materials, and the bulk with a thickness of 6mm is formed
Glass；
The glass of forming is put into 730 DEG C of annealing furnaces by step 6), keeps the temperature 35min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.397g/cm3, hardness 714MPa, the dielectric loss in addition measuring glass sample is
1.79×10-3, thermalexpansioncoefficientα is 37.35 × 10-7。
Embodiment 3:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 66.96%, 10.67% boron
Acid anhydride, 10.96% aluminium oxide, 2.23% magnesia, 8.57% calcium oxide, 0.54% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 25min
1670 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1410 DEG C from 1670 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1410 DEG C in whipping process；Then 1670 DEG C are warming up to by 25min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1670 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of copper-made mould, and the both bulk glasses with a thickness of 7mm are formed；
The glass of forming is put into 720 DEG C of annealing furnaces by step 6), keeps the temperature 40min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.407g/cm3, hardness 722MPa, the dielectric loss in addition measuring glass sample is
1.77×10-3, thermalexpansioncoefficientα is 35.50 × 10-7。
Embodiment 4:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 66.35%, 11.50% boron
Acid anhydride, 10.86% aluminium oxide, 2.20% magnesia, 8.49% calcium oxide, 0.53% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 25min
1675 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1400 DEG C from 1675 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1400 DEG C in whipping process；Then 1675 DEG C are warming up to by 25min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1675 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 8mm are formed；
The glass of forming is put into 720 DEG C of annealing furnaces by step 6), keeps the temperature 50min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.395g/cm3, hardness 721MPa, the dielectric loss in addition measuring glass sample is
1.75×10-3, thermalexpansioncoefficientα is 36.80 × 10-7。
Embodiment 5:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 65.74%, 12.3% boron
Acid anhydride, 10.76% aluminium oxide, 2.19% magnesia, 8.41% calcium oxide, 0.53% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 30min
1680 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1400 DEG C from 1680 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1400 DEG C in whipping process；Then 1680 DEG C are warming up to by 30min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 8mm are formed；
The glass of forming is put into 710 DEG C of annealing furnaces by step 6), keeps the temperature 60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.382g/cm3, hardness 718MPa, the dielectric loss in addition measuring glass sample is
1.74×10-3, thermalexpansioncoefficientα is 36.10 × 10-7。
Embodiment 6:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 65.5%, 12.5% boric anhydride,
10.50% aluminium oxide, 2.30% magnesia, 8.63% calcium oxide, 0.5% strontium oxide strontia, 0.07% tin oxide；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 30min
1680 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1400 DEG C from 1680 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1400 DEG C in whipping process；Then 1680 DEG C are warming up to by 30min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 8mm are formed；
The glass of forming is put into 730 DEG C of annealing furnaces by step 6), keeps the temperature 60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The density of glass sample is 2.377g/cm3, hardness 699MPa, the dielectric loss in addition measuring glass sample is
1.72×10-3, thermalexpansioncoefficientα is 35.10 × 10-7。
Embodiment 7:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 65.93%, 12.5% boron
Acid anhydride, 10.50% aluminium oxide, 2.10% magnesia, 8.40% calcium oxide, 0.5% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 30min
1680 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1400 DEG C from 1680 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1400 DEG C in whipping process；Then 1680 DEG C are warming up to by 30min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 8mm are formed；
The glass of forming is put into 720 DEG C of annealing furnaces by step 6), keeps the temperature 60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
Embodiment 8:
Step 1), according to feed molar percentage (mol%), the quartz sand of precise 65.93%, 12.1% boron
Acid anhydride, 10.50% aluminium oxide, 2.10% magnesia, 8.80% calcium oxide, 0.5% strontium oxide strontia, 0.07% oxidation
Tin；
The raw material of weighing is sequentially placed into batch mixer by step 2), mix to the uniformity be greater than 99% after form batch；
Batch addition has been warming up in 1450 DEG C of corundum crucible by step 3)；Then, it is warming up to by 30min
1680 DEG C, and after keeping the temperature 2h, furnace temperature is cooled to 1400 DEG C from 1680 DEG C by 30min, glass metal is carried out using agitating paddle
5min is stirred, temperature is maintained at 1400 DEG C in whipping process；Then 1680 DEG C are warming up to by 30min again, and keep the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 8mm are formed；
The glass of forming is put into 700 DEG C of annealing furnaces by step 6), keeps the temperature 60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min to get the electric substrate glass of light-high-strength
Glass.
The test result of Fig. 1 can see, and the density and hardness changing rule of glass sample is similar, occur greatly
Value.The reason is that boron oxide content changes greatly in glass ingredient, and when having alkali metal or alkaline-earth metal in glass composition,
Ever-increasing boron oxide leads to free hypoxgia, makes boron oxygen tetrahedron [BO4] it is changed into boron oxygen triangle body [BO3], make the knot of boron
Structure changes from rack-like structure to layer structure, it may appear that " boron anomalous effect " shows as generating maximum in curve in performance
And minimum.
Finally it should be noted that: the above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, to the greatest extent
Pipe is described the invention in detail referring to above-described embodiment, it should be understood by those ordinary skilled in the art that: still may be used
With modifications or equivalent substitutions are made to specific embodiments of the invention, and repaired without departing from any of spirit and scope of the invention
Change or equivalent replacement, should all cover in present claims range.
Claims (5)
1. a kind of light-high-strength electric substrate glass, it is characterised in that it is formulated by mole including following raw material group
Point: 65.5~68% quartz sand, 8.8~12.5% boric anhydride, 10.5~11.5% aluminium oxide, 2.1~2.3% oxidation
Magnesium, 8.4~8.8% calcium oxide, 0.50~0.55% strontium oxide strontia, 0.07% tin oxide.
2. the preparation method of light-high-strength electric substrate glass described in a kind of claim 1, it is characterised in that including following step
It is rapid:
Step 1) weighs raw material according to feed molar percentage；
The raw material of weighing is sequentially placed into batch mixer by step 2), is uniformly mixed and is formed batch；
Batch addition is warming up in 1450 DEG C of corundum crucible by step 3)；Then, 1650 are warming up to by 15~30min
~1680 DEG C and 2h is kept the temperature, furnace temperature is cooled to 1400~1420 DEG C from 1650~1680 DEG C by 30min and glass metal is stirred
5min is mixed, finally, being warming up to 1650~1680 DEG C by 15~30min again and keeping the temperature 2h；
Furnace temperature is cooled to 1300 DEG C from 1650~1680 DEG C by 30min by step 4)；
Step 5) is poured into 1300 DEG C of glass metal in 600 DEG C of mold, and the both bulk glasses with a thickness of 5~8mm are formed；
The glass of forming is put into 700~730 DEG C of annealing furnaces by step 6), keeps the temperature 30~60min；
Step 7) is cooled to room temperature according to the cooling rate of 1~3 DEG C/min, obtains light-high-strength electronics through cutting and polishing
Base plate glass.
3. preparation method according to claim 2, it is characterised in that: in the step 5), mould therefor material is not using
Become rusty steel, graphite or copper.
4. preparation method according to claim 2, it is characterised in that: in the step 2), by the raw material of weighing mix to
The uniformity forms batch after being greater than 99%.
5. the light-high-strength electric substrate glass prepared according to any one of claim 2-4 method, it is characterised in that: density is
2.377~2.407g/cm3, hardness is 699~722MPa, and the dielectric loss in addition measuring glass sample is 1.72 × 10-3~
1.81×10-3, thermalexpansioncoefficientα is 31.87 × 10-7~37.35 × 10-7。
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| CN101568495A (en) * | 2007-06-08 | 2009-10-28 | 日本电气硝子株式会社 | Alkali-free glass and alkali-free glass substrate |
| CN107188399A (en) * | 2017-07-14 | 2017-09-22 | 安徽凯密克企业管理咨询有限公司 | A kind of automotive window high strength glass production technology |
| CN108975694A (en) * | 2018-08-20 | 2018-12-11 | 陕西科技大学 | A kind of preparation method of low viscosity high-boron-silicon glass |
| CN109502972A (en) * | 2018-12-17 | 2019-03-22 | 陕西科技大学 | A kind of preparation method of the electric substrate glass with boron anomalous effect |
-
2019
- 2019-03-01 CN CN201910154898.0A patent/CN109704574A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568495A (en) * | 2007-06-08 | 2009-10-28 | 日本电气硝子株式会社 | Alkali-free glass and alkali-free glass substrate |
| CN107188399A (en) * | 2017-07-14 | 2017-09-22 | 安徽凯密克企业管理咨询有限公司 | A kind of automotive window high strength glass production technology |
| CN108975694A (en) * | 2018-08-20 | 2018-12-11 | 陕西科技大学 | A kind of preparation method of low viscosity high-boron-silicon glass |
| CN109502972A (en) * | 2018-12-17 | 2019-03-22 | 陕西科技大学 | A kind of preparation method of the electric substrate glass with boron anomalous effect |
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