WO2013181924A1 - 一种具有低热膨胀系数的平板玻璃及其制造工艺 - Google Patents
一种具有低热膨胀系数的平板玻璃及其制造工艺 Download PDFInfo
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- WO2013181924A1 WO2013181924A1 PCT/CN2013/000509 CN2013000509W WO2013181924A1 WO 2013181924 A1 WO2013181924 A1 WO 2013181924A1 CN 2013000509 W CN2013000509 W CN 2013000509W WO 2013181924 A1 WO2013181924 A1 WO 2013181924A1
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- Prior art keywords
- glass
- content
- oxide
- temperature
- substrate
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- 239000005357 flat glass Substances 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims abstract description 73
- 230000008569 process Effects 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 46
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000292 calcium oxide Substances 0.000 claims abstract description 46
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052810 boron oxide Inorganic materials 0.000 claims abstract description 40
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 31
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 31
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 29
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910001948 sodium oxide Inorganic materials 0.000 claims abstract description 24
- 229910001950 potassium oxide Inorganic materials 0.000 claims abstract description 18
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 239000011521 glass Substances 0.000 claims description 206
- 238000002844 melting Methods 0.000 claims description 66
- 230000008018 melting Effects 0.000 claims description 66
- 239000000758 substrate Substances 0.000 claims description 48
- 229910052782 aluminium Inorganic materials 0.000 claims description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 25
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 238000006124 Pilkington process Methods 0.000 claims description 11
- 238000003490 calendering Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 230000009969 flowable effect Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 description 69
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 68
- 239000005388 borosilicate glass Substances 0.000 description 60
- 230000000694 effects Effects 0.000 description 37
- 239000006184 cosolvent Substances 0.000 description 34
- 238000002425 crystallisation Methods 0.000 description 31
- 230000008025 crystallization Effects 0.000 description 31
- 238000000465 moulding Methods 0.000 description 31
- 238000005516 engineering process Methods 0.000 description 29
- 238000000265 homogenisation Methods 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 25
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 20
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 20
- 239000011591 potassium Substances 0.000 description 20
- 239000011734 sodium Substances 0.000 description 20
- 229910052708 sodium Inorganic materials 0.000 description 20
- 229910052700 potassium Inorganic materials 0.000 description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 16
- 239000011777 magnesium Substances 0.000 description 16
- 229910052749 magnesium Inorganic materials 0.000 description 16
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 15
- 239000011575 calcium Substances 0.000 description 15
- 229910052791 calcium Inorganic materials 0.000 description 15
- 230000007547 defect Effects 0.000 description 13
- 238000000137 annealing Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 11
- 230000007613 environmental effect Effects 0.000 description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 9
- 230000009970 fire resistant effect Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 7
- 238000011031 large-scale manufacturing process Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 239000002341 toxic gas Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 230000005496 eutectics Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 239000000156 glass melt Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000005329 float glass Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000005347 annealed glass Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- CDMADVZSLOHIFP-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 CDMADVZSLOHIFP-UHFFFAOYSA-N 0.000 description 1
- 230000008029 eradication Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- 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
Definitions
- the present invention relates to a flat glass, and more particularly to a flat glass having a low coefficient of thermal expansion and a process for producing the same.
- the scope of the field is: (1) building doors, windows, curtain wall flat glass, (2) flat glass for automobiles and ships, (3) flat glass for high-speed rail, (4) flat panel glass for LCD display, (5) PDP display Screen flat glass, (6) TFT display flat glass and high-strength panel flat glass for smartphones and iPads, (7) process flat glass and other products and reworked flat glass tempered products, (8) liquid crystal display flat glass, (9) Photovoltaic solar device flat glass.
- the silica is 40-70%, and in the actual boron glass and the examples in all of these products, the proportion of silicon is as high as 60-70%.
- the boron oxide content is 8-20%, and in practical use, the content of boron oxide in the product is 10-15%. It also replaces the sodium oxide component with boron oxide to achieve the purpose of fluxing.
- boron component For example, if more than 10% of the boron component is added, it must be added 2 to 3 times on the raw material. For example, 10% boron content of the glass must be added to 30- A raw material with a content of 38% boron oxide (because most of the boron component will become a toxic gas at high temperatures). Its technical flaws are:
- the proportion of silicon is 60-70%, and in order to achieve the technical purpose of reducing the thermal expansion coefficient, the boron oxide content is 10 -20%, in actual use, boron oxide in the product content of 10-15%. It also replaces the sodium oxide component with boron oxide to achieve the purpose of fluxing, and if more than 10% of the boron component, it must be added 2-3 times on the raw material. For example, 10% boron content of the glass must be added to the content of 30-38% boron oxide (because most of the boron components will become toxic gases at high temperatures).
- the melting temperature of the borosilicate glass is too high, the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s) is 1760 ⁇ ; the homogenization bubble density temperature is 10 2 fl (Pa ⁇ s) is 1620 ° C It is very difficult to control the quality of the process and reduce the cost of energy consumption.
- Boron glass equipment has high maintenance cost and low efficiency: its technical defect is that when the boron content reaches 10-20%, the molten pool will be seriously corroded in the actual production (so all the TFT non-alkaline borosilicate glass and German nitrate The building fire-resistant alkali-free borosilicate glass and PDP plasma borax glass pool represented by the company are only cold-repaired in one year, which causes serious production cost and efficiency problems.
- the inventor's prior art invention is entitled "Application of a glass to a flat glass containing a high annealing point, high flatness, low viscosity and environmental protection characteristics, a flat glass, a preparation method and a display screen, a photovoltaic solar device and a preparation thereof
- the method and the display screen of the patent application technology of 201110060944. 4 the high crystallization temperature is the main defect, and it is not necessary to disclose any crystallization temperature data in the patent document, but the crystallization temperature of the technical solution can be determined.
- Comparative document Comparative prior art JP11-240734 A, Example 3 thereof. :
- the content of the silicon oxide is 4.22 times that of the calcium oxide content
- the content of the calcium oxide is 1.39 times that of the magnesium oxide
- the cosolvent sodium ten potassium
- the most auxiliary solvent 8-11, 5%
- the invention is an omission of the cosolvent (sodium ten potassium), breaking the existing flat glass technology in the aluminum content
- it is more than 8%, it must be made of boron, sodium and potassium cosolvents.
- the technical solution of the present invention breaks the existing flat glass technology, when the aluminum content exceeds 15%, the viscosity temperature is too high, and the large-scale production of the flat glass technology cannot be realized, in particular, the flat glass technology cannot be overcome. Difficulties in the process; when the aluminum content exceeds 15%, the addition of boron, sodium, potassium cosolvent components can not achieve the technical bias of large-scale production of flat glass technology;
- the technical scheme of the present invention finds that the high aluminum content is 8, 6-30% or 17%-30 when the boron, sodium and potassium cosolvent components are not contained (the invention of the boron oxide and potassium oxide and sodium oxide cosolvent components is omitted).
- the high aluminum eutectic properties of aluminum, silicon, calcium and magnesium especially from the six examples of the present invention, when boron, sodium and potassium cosolvent components are not contained (for boron oxide and potassium oxide and oxidation)
- the omission of the sodium cosolvent component when the alumina content is 17-28% or 20% or 24% or 28% of the large span change, the prior art considers the viscosity temperature, especially the melting and the bubble viscosity temperature Will increase dramatically, but when the alumina content of the present invention is 17 - 28% or 20% or 24% or 28%, the change in melting temperature and bubble viscosity temperature is only 30 ° C - 60 ° C; and the melting and defoaming viscosity temperature at 22%
- viscosity temperature is also prior art: (Comparative Example 1, TFT glass and fireproof glass examples)
- the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s) and the temperature is 1750 ° C viscosity temperature; actual homogenization When the bubble viscosity temperature is 10 2 (Pa ⁇ s), it is 1630 °C ;
- Embodiment 1 of the present invention The actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s), the temperature is 1590 ° C viscosity temperature, and the actual homogenization bubble viscosity temperature is 10 2 (Pascals per second) is 1425 ° C ;
- the technical scheme of the invention is smaller than the boron-containing cosolvent component in the absence of boron, sodium and potassium cosolvent components.
- Glass and fire-retardant glass have a prior art actual melting viscosity temperature and an actual homogenization bubble viscosity temperature, which is low
- the bending strength of the glass in the present specification and the embodiment of the present invention is determined by cutting a sample into a strip of 50 mm X 50 ⁇ X 5 , using a bending strength meter according to the standard GB/T3810, 4-2006.
- the sulphate content is 1.33 times; the content of the calcium oxide is 1.33 times;
- a completely different technique for producing glass fibers in the field of flat glass technology according to the contents of the new invention of known products according to the Chinese Patent Examination Guide, Part 2, Chapter 4, 5, a method for producing fibers disclosed in the present invention and the comparative document The difference is very large;
- the technical solution of the present invention, in the new use for flat glass finds an inherently new low coefficient of thermal expansion property, resulting in the eradication of TFT glass and unexpected in new applications for flat glass
- the technical effect of toxic gas emission and environmental protection in fireproof glass production the technical effect of large energy saving; the technical effect of greatly reducing the cost of the production system and prolonging the life of the production system; and the reduction of the calculus rate due to the low melting temperature;
- a flat glass having a low coefficient of thermal expansion characterized in that: by weight, the glass 8 ⁇ -1. 99.
- the content of the content of the magnesium oxide is 0.8 times - 1. 99
- the difference between the values of the thermal expansion coefficient of the glass at each end of the lCXTC of 400 ⁇ -630 ° C is within 1-3 parts per million;
- the thickness difference of the glass is less than 0. 3mm;
- the water absorption rate is in the range of 0-0. 3%;
- the flat glass is characterized in that it contains alumina, silica, calcium oxide, magnesium oxide, and a total of 0, 1- -0, 5 containing sodium oxide and potassium oxide and boron oxide.
- the content of the content of the content of the calcium oxide is 0.81. ⁇ -1. 99 times; the difference in the coefficient of thermal expansion of the glass between 400 ° C and 630 ° C per 100 ° C, within 1-3 parts per million;
- the thickness difference of the glass is less than 0. 3mm;
- the water absorption rate is in the range of 0-0. 3%;
- the total content of sodium oxide and potassium oxide and boron oxide is 0, 1-0, 5%, which is the total content of sodium oxide and potassium oxide and boron oxide which cannot be overcome in the glass raw material. Can not produce a cosolvent effect, which is an omission of the glass cosolvent sodium oxide and potassium oxide and boron oxide.
- the plate glass is characterized in that: by weight, the silicon oxide is 4.11 times - 4, 56 times or 4, 57 times - - 5. 48 times;
- the flat glass is characterized in that: by weight percentage, the alumina content is 15. 5-35%, the boron oxide content is 0, 001-0, 2% of the impurity component, and the content of the silica is the calcium oxide content. 4. ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ . ⁇ .
- the natural content range of the boron oxide component does not produce a cosolvent effect, and this is an omission of the glass cosolvent boron oxide.
- the flat glass is characterized in that it contains alumina, silica, or
- the content of the content of the silicon oxide is 4. 6-35%, and the content of the silicon oxide is 4. 11% of the calcium oxide content.
- the content of the content of the silicon oxide is 4. ⁇ 5.
- the ratio of the content of the magnesium oxide is 0.8 times - 1. 99 times; the coefficient of thermal expansion of the glass is between 400 ° C and 630 ° C per 100 ° C of the value of The difference between them is 1-3 parts per million;
- the thickness difference of the glass is less than 0. 3mm;
- the water absorption rate is in the range of 0-0. 3%;
- the total content of sodium oxide and potassium oxide is 0, 1-0, 5% of the impurity component, which is the total content of the natural content of sodium oxide and potassium oxide which cannot be overcome in the glass raw material, and cannot produce a cosolvent effect. Omission of the glass cosolvent sodium oxide and potassium oxide
- the flat glass is characterized in that: the boron oxide containing 0, 001--0, and 5% of the impurity component is an insurmountable natural content range of the glass raw material, and cannot produce a cosolvent function, which is to help the glass.
- the solvent boron oxide omits the invention.
- the flat glass is characterized in that: the sodium oxide content is 0, 01- 0, 9% by weight, and the thickness is 0, 1 MM - 5 Torr. Suitable for TFT LCD flat glass.
- the flat glass is characterized in that: the sodium oxide content is 0, 9-13% by weight, and the thickness is 0, 1 ⁇ -1, 5MM. Suitable for electronic touch screen flat glass.
- the flat glass is characterized in that: the sodium oxide content is 0, 01- 0, 9% by weight, and the thickness is 1, 5 MM-25 ⁇ . Suitable for fireproof and explosion-proof flat glass for construction.
- the flat glass is characterized in that the sodium oxide content is 0, 9-13% by weight, and the thickness is 1, 5 ⁇ -25 MM. Suitable for high strength flat glass for construction.
- the plate glass is characterized in that: by weight percentage, the silicon oxide is 4.11 times - 4, 56 times or 4, 57 times - 5. 48 times;
- the flat glass is characterized in that: the glass has a coefficient of thermal expansion of from 400 ° C to 700 ° C per 100 ° C, ranging from 1 part per million to 3 parts per million, the viscosity of the glass is The temperature at 10 1 ⁇ 5 Pa ⁇ s is 1480 ° C - 160 ° C; the temperature at 10 2 Pa ⁇ s is 1370 ° C_1490 ° C;
- a liquid crystal display comprising: An array substrate comprising a substrate and a pixel structure on the substrate, the substrate being a glass plate made of the flat glass according to any one of claims 1-5;
- the color filter substrate comprising a substrate and a color filter layer on the substrate, the substrate being a glass plate manufactured by the flat glass according to any one of claims 1-5;
- a PDP plasma screen display comprising:
- the front plate process comprising: the substrate glass, the transparent electrode, the bus electrode, the transparent electric conductor layer, the mgo mold manufactured by the flat glass according to any one of the preceding claims 1-5;
- a back sheet process comprising: a phosphor layer, a partition wall, a lower plate transparent electric conductor layer, an address electrode, a substrate glass made of the flat glass according to any one of the preceding claims 1-5;
- a smart touch display screen comprising:
- the display includes:
- An array substrate comprising a substrate and a pixel structure on the substrate, the substrate being a glass plate; a color filter substrate, the color filter substrate comprising a substrate and a color filter layer on the substrate, the substrate being a glass Board
- a glazed flat glass whose substrate glass is a glaze layer having 1-10 colors on the surface thereof according to the flat glass.
- a method for manufacturing flat glass having a low coefficient of thermal expansion characterized in that: Step 1.
- Various predetermined essential alumina, silica, calcium oxide, magnesium oxide components, and predetermined silicon oxide, required for the glass formulation configuration according to any one of claims 1-5 The raw materials of calcium oxide and magnesium oxide are melted at a melting temperature corresponding to each glass formulation after being mixed and stirred to form a molten glass of a predetermined viscosity, which is homogenized, clarified, and discharged to form a flowable melt;
- Step 2 selecting a float process, a flat pull process, a lattice process, a calendering process, an overflow process, or any one of the processes to form the glass.
- Fig. 2 is a schematic view showing the structure of the flat glass of the present invention
- Fig. 3 is a schematic view of the melting apparatus of the invention
- Fig. 4 is a flow chart of Fig. 2; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
- Fig. 4 is a flow chart of Fig. 2; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
- the contents of various components in the glass are percentages by weight unless otherwise specified.
- the oxidized magnesium content is 9.1%, alumina.
- the oxidized magnesium content is 9.1%, the alumina content is 9.1%, the alumina content is 9.1%, the alumina content is 9. 1%, alumina 5 ⁇
- the content of the content of the calcium oxide is 1.5 times.
- the difference between the values of the coefficient of thermal expansion of the glass at a temperature of from 400 ° C to 700 ° C per 100 ° C is 1.0 parts per million to 3.0 parts per million.
- the actual melting temperature at a temperature of 10 1 ⁇ 5 (Pascals per second) is a viscosity temperature of 1590 ° C, and the actual homogenization bubble viscosity temperature is 10 2 ° Pa (seconds) is 1425 ° C ; the molding viscosity temperature is 10 3 (Pa ⁇ s) is 1235 ° C; the crystallization temperature is 1200 ° C.
- the thickness difference of the glass is less than 0.2 mm;
- the flat glass having a low expansion coefficient of the present invention has a silica content of 52.2% by weight, a calcium oxide content of 12.2%, a magnesium oxide content of 7.6%, and an alumina content of 28%.
- the content of silicon oxide is 4.3 times that of calcium oxide, and the content of calcium oxide is 1.6 times that of magnesium oxide.
- the difference in thermal expansion coefficient of the glass between 400 ° C and 700 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million.
- the actual melting viscosity temperature is 10 1 ' 5 (Pa ⁇ s), the temperature is 1680 ° C viscosity temperature, and the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s), which is 1475 ° C; the molding viscosity temperature is 10 3 (Pa ⁇ s) is 1265 ° C; the crystallization temperature is 1240 ° C.
- the thickness difference of the glass is less than 0.2 mm ;
- the flat glass having a low expansion coefficient of the present invention has a silica content of 58% by weight, a calcium oxide content of 11.8%, a magnesium oxide content of 9.2%, and an alumina content of 21% by weight.
- the content of silicon oxide is 4.9 times that of calcium oxide, and the content of calcium oxide is 1.3 times that of magnesium oxide.
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 650 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million.
- the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s), the temperature is 1630 ° C viscosity temperature, and the actual homogenization bubble viscosity temperature is 10 2 (Pascals per second) is 1460 ° C; the molding viscosity temperature is 10 3 (Pa ⁇ s) is 1250 ° C; The crystallization temperature was on the line at 1205 °C.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the content of the silicon oxide in the glass is 51. 4%, the content of calcium oxide is 10.7%, the content of calcium oxide is 8%, and the content of alumina is 8%. ⁇
- the content of magnesium oxide is 1.3 times the content of magnesium oxide.
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 650 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million.
- the actual melting viscosity temperature is 10 1 ⁇ 5 (kPa, sec) at a temperature of 1650 ⁇ viscosity temperature, and the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s) at 1470 ° C; the molding viscosity temperature is 10 3 (Pa The second is 1250 ° C; the crystallization temperature is 1225 ° C.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the 3% of the content of the silicon oxide in the glass is 59.5%
- the content of the calcium oxide is 11.3%
- the content of the calcium oxide is 8%
- the content of the aluminum oxide is 8%. 4 ⁇
- the content of the content of the magnesium oxide is 1.4 times the content of the magnesium oxide.
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 650 ° C per 100 ⁇ is in the range of 1.0 to 10,000 parts per million.
- the actual melting temperature at a temperature of 10 1 ⁇ 5 is a viscosity temperature of 1660 ° C, and the actual homogenization of the bubble viscosity temperature is 1490 ⁇ at a bubble viscosity temperature of 10 2 (Pa ⁇ s); the molding viscosity temperature is 10 3 ( Pa ⁇ second) is 1250 ° C ; the crystallization temperature is 1200 ° C.
- the thickness difference of the glass is less than 0. 2mm;
- the alumina content is 16.6%
- the content of the content of the oxidized magnesium is 6%
- the content of the oxidized calcium is 6%. 4 ⁇
- the content of the content of the magnesium oxide is 1.4 times the content of the magnesium oxide.
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 650 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the content of silicon oxide in the glass is 4.5%
- the content of calcium oxide is 4.5%
- the content of magnesium oxide is 0.5%
- the content of alumina is 12%
- the content of boron oxide is 14%
- the content of cerium oxide At 10%, the content of silicon oxide is 13 times that of calcium oxide, and the content of calcium oxide is 9 times that of magnesium oxide.
- the glass has a coefficient of thermal expansion between 400 ° C and 70 (the difference between the values of the TC per 100 ° C) is within a range of 1.0 to 10,000 parts per million.
- the actual melting temperature at a temperature of 10 1 ⁇ 5 is a viscosity temperature of 1750 ° C; the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s) is 1630 ° C; the molding viscosity temperature is 10 3 (Pa ⁇ s) is 1420 ⁇ ; the crystallization temperature is 1260 ° C.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 700 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million.
- the actual melting viscosity temperature is 10 1 , 5 (Pa ⁇ s) and the temperature is 175 CTC viscosity temperature; the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s) is 1630 ° C; the molding viscosity temperature is 10 3 (Pa ⁇ Second) is 1420 ° C ; crystallization temperature is 1260 ° (.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the percentage by weight of silica in the glass is 76%, the content of calcium oxide is 6%, the content of magnesium oxide is 2%, the content of alumina is 1%, the content of sodium oxide is 14%, and the content of potassium oxide is 1%.
- the content of silicon oxide is 12 times that of calcium oxide, and the content of calcium oxide is 3 times that of magnesium oxide.
- the difference in the coefficient of thermal expansion of the glass between 550 ° C and 623 ° C is 20 parts per million.
- the actual melting viscosity temperature is 10 1 ' 5 (Pa ⁇ s) at a temperature of 1590 ° C ;
- the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s) is 143 CTC;
- the molding viscosity temperature is 10 3 (Pa ⁇ s) ) is 1140 ° C;
- the crystallization temperature is 950 ° C.
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- Comparative Example 4 prior art of the present inventor:
- the invention name is "a glass plate in a flat glass containing high annealing point, high flatness, low viscosity and environmental protection characteristics, flat glass, preparation method and display screen, photovoltaic solar device And its preparation method and display screen” application number of 201110060944.
- the difference in the coefficient of thermal expansion of the glass between 400 ° C and 650 ° C per 100 ° C is in the range of 1.0 to 10,000 parts per million;
- the actual melting viscosity temperature is 10 1 ' 5 (Pa ⁇ s) at a temperature of 153 CTC; the actual homogenized bubble viscosity temperature is 10 2 (Pa ⁇ s) at 1380 ° C; the molding viscosity temperature is 10 3 (Pa ⁇ s) ) is 1140 ° C; the crystal temperature is 1220 ° C
- the thickness difference of the glass is less than 0. 2mm;
- the water absorption rate is in the range of 0.01%
- the flexural strength of the glass in the present specification and the embodiment of the present invention is determined according to the standard GB/T3810, 4-2006; the sample is cut into 5-8 strips of 50 mm ⁇ 50 mm ⁇ 5 mm, and the average value is determined by using a bending strength meter. .
- the coefficient of thermal expansion in the examples of the present invention is determined in accordance with the QB/T1321-1991 detection standard.
- Figure 1 is a schematic illustration of a float glass 12 produced by a float production apparatus in accordance with the present invention.
- the production apparatus of the float glass of the present invention comprises: a silo 2, a mixing device 3, a melting device 4, a working portion 5, a tin kiln 7, a transition roller table 8, an annealing kiln 9, a cutting and dispensing station 10. These portions are all mounted on the float line substrate 11.
- the raw material 1 of the glass is mixed and poured into the silo 2 in proportion, and enters the mixing device 3.
- the mixing device 3 may have a stirrer which can increase the degree of mixing of the raw material 1.
- the melting device 4 melts the mixed raw materials.
- the middle and lower layers of the melting device 4 are installed with 3 to 200 electric heating devices 41 and 3 to 200 temperature measuring devices 42 having a distance of 0.2 m to 2 m.
- the molten glass liquid enters the working portion 5, and processes such as evacuation, homogenization, and clarification are performed in the working portion 5.
- the measuring device of the working portion 5 is installed with 3 to 200 electric heating devices having a distance of 0.2 m to 2 m and 3 to 200 measuring temperature devices having a distance of 0.2 m to 2 m.
- the liquid flowing out of the working portion 5 enters the tin kiln 7, which has a flow guiding groove 6, the lateral direction of the sandwiching groove of the guiding groove 6.
- the longitudinal direction of the exit is 0.5.
- the transition roll table 8 is connected to the tin kiln 7 and the annealing kiln 9, and the annealed glass plate enters the cutting and dispensing station 10 for slitting and packaging.
- Fig. 3 shows a more specific structure of the melting device.
- a plurality of electric heating devices and temperature measuring devices are disposed in the lower middle layer of the melting device 4.
- the middle portion and the lower portion of the working portion and the guiding groove are also provided with a similar structure.
- the lower middle layer refers to an area that is measured from the bottom of the melting device 4 cavity by 0 to 80%.
- the manufacturing process of the flat glass having the low thermal expansion coefficient of the present invention is further described by the float forming process, and the manufacturing process comprises the following steps:
- the mixture prepared in the step (1) is transported from the feed port of the silo of Fig. 3 into the raw material storage tank by means of the raw material conveying belt. Then, the mixture prepared in the step (1) is fed into the molten pool of the predetermined high temperature resistant melting device through the mouth of the melting device, and gradually forms a fluidity in a temperature zone corresponding to the melting temperature of each glass formulation. A good liquid melt gradually discharges the bubbles in the liquid raw material through the high temperature zone, thereby forming a melt of the mixed raw material which can enter the molding process and has good fluidity.
- the melt of the mixed raw material with better flowability in the step (3) is flowed from the melting device through the nip of the guide trough to the float method.
- the tin bath of the production line also known as tin kiln
- the tin bath of the production line is flattened, pulled by the edger and pulled by the tractor, polished and flattened on the tin surface, forming a semi-finished strip through the transition roll
- the annealing kiln entering the cooling system of the roller conveyor is cooled, and then enters the cutting and dispensing station, and after cutting and dispensing, the flat glass shown in Fig. 1 can be obtained.
- a flat pull process for the molding process of the glass according to the embodiment of the present invention, in addition to the above-mentioned float process, a flat pull process, a lattice process, a calendering process, an overflow process, a re-draw process, and a press molding may be employed. Any process in process molding.
- the flowable glass melt formed in the melting step is drawn from the bath to form a glass ribbon, and the flattening process is characterized by thinning, forming, annealing, cooling, and slitting, that is, The above glass can be obtained.
- the flowable glass melt formed in the melting step is pulled upward from the bath to form a glass ribbon, which is formed, annealed, cooled, and slit by a lattice process to obtain the glass.
- the flowable glass melt formed in the melting step is drawn upward from the bath to form a glass ribbon, which is calendered, shaped, annealed, cooled, and slit to obtain the glass.
- the flowable glass melt formed in the melting step is subjected to an overflow process, followed by down-forming, forming, annealing, cooling, and slitting to obtain the above glass.
- the silicon oxide is 40-70%.
- the proportion of silicon is 60-70%, and the technology for lowering the thermal expansion coefficient is achieved.
- the purpose is to have a boron oxide content of 8-20%. In practical applications, boron oxide is present in the product in an amount of 10-15%. It also replaces the sodium oxide component with boron oxide to achieve the purpose of fluxing.
- the boron component For example, if more than 10% of the boron component is added to the raw material, it must be added 2-3 times. For example, the glass of 10% boron content must be added to 30- A raw material with a content of 38% boron oxide (because most of the boron component will become a toxic gas at high temperatures).
- the ratio of silicon is as high as 60-70%, and in order to achieve the technical purpose of lowering the coefficient of thermal expansion, the boron oxide content is 10-20. %, In actual use, boron oxide is 10-15% in the product. It also replaces the sodium oxide component with boron oxide to achieve the purpose of fluxing. For example, if more than 10% of the boron component is added to the raw material, it must be added 2-3 times. For example, the glass of 10% boron content must be added to 30- A raw material with a content of 38% boron oxide (because most of the boron component will become a toxic gas at high temperatures).
- the melting and venting viscosity temperature is too high, and the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s) is 1760 ⁇ ;
- the homogenization bubble viscosity temperature 10 2 '° (Pa ⁇ s) is 1620 ° C, which is very difficult to control the process quality and reduce energy consumption;
- the equipment maintenance cost is high and the efficiency is low:
- the technical defect is that when the boron content reaches 10-20%, the molten pool will be seriously corroded in the actual production (so all the TFT non-alkaline borosilicate glass and the building are made by the German company
- the representative fireproof alkali-free borosilicate glass and PDP plasma borosilicate glass pool are only cold repaired in one year, which causes serious production cost and efficiency problems.
- the present invention is an omission of the boron oxide component (see the first to sixth embodiments; the TFT glass and fireproof glass embodiment of Comparative Example 1; and the PDP glass embodiment of Comparative Example 2);
- the glass has a high level of thermal expansion coefficient: the difference in the coefficient of thermal expansion of the glass between 400 ° C and 620 ° C per 100 ° C, is 1 part per million. 0 - 3 parts per million. 0 ⁇ 3 ⁇ Within 0, or the difference between the value of the coefficient of thermal expansion of the glass at 400 ° C -700 ° C per 100 ° C, is 1 million parts per million.
- the technical solution of the present invention is very advantageous for upgrading and replacing the fireproof boron-containing glass and the PDP plasma boron-containing glass and the TFT alkali-free boron-containing glass represented by the German company.
- the technical solution of the present invention finds a high aluminum content of 8, 6 - 30% or 17% - 30% or 21% or 24 when the boron-free cosolvent component is not contained (the invention is omitted for boron oxide and potassium oxide and sodium oxide)
- At % or 28% there are high aluminum eutectic properties of aluminum, silicon, calcium, and magnesium; especially from the six examples of the present invention, when boron, sodium, and potassium cosolvent components are not contained (for boron oxide and oxidation) Potassium and sodium oxide are omitted.
- the alumina content is 17-28% or 20% or 24% or 28%
- the prior art considers the viscosity temperature, especially the melting and The bubble temperature will increase the viscosity temperature greatly, but the melting temperature and the melting temperature of the present invention when the alumina content is 8, 6-30%, 17-28% or 20% or 24% or 28% or so
- the bubble viscosity temperature changes only 30 ° C -60 ° C (see 6 examples of the invention);
- the alumina content is only 12%
- the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s)
- the temperature is 1750 ° C viscosity temperature
- the actual homogenization row When the bubble viscosity temperature is 10 2 (Pa ⁇ s), it is 1630 ° C;
- the alumina content is 22%
- the actual melting viscosity temperature is 10 1 ' 5 (Pa ⁇ s)
- the temperature is 1590 ° C viscosity temperature
- the actual homogenization bubble viscosity temperature is 10 2 (Pa ⁇ s) is 1425 °C;
- the present invention does not contain a boron oxide component (see the first to sixth embodiments; the TFT glass and fireproof glass embodiment of Comparative Example 1; and the PDP glass embodiment of Comparative Example 2), the boron glass can be overcome.
- the environmental problem of toxic gas volatilization. (For example: 10% boron content of glass for building fireproof alkali-free borosilicate glass and PDP plasma borosilicate glass and TFT alkali-free borosilicate glass represented by German Nitrotech Co., Ltd.) must be added with 30-38% boron oxide content. Raw materials, because most of the boron components will become volatile in the high temperature, causing industrial environmental problems.
- the invention does not have a boron component of 10-20%, the molten pool will be seriously corroded in production; therefore, all the TFT non-alkaline boron glass and the building represented by the German company, can be overcome.
- the fire-resistant alkali-free borosilicate glass and PDP plasma borosilicate glass pool are only cold repaired in one year, which causes serious production cost and efficiency problems; technology that can achieve unexpectedly lower equipment cost and equipment use efficiency effect.
- the temperature at which the actual melting viscosity of the glass of the present invention is 10 1 ' ⁇ Pa ⁇ sec) is 1480 ° C to 1690 ° C
- the building fire-resistant alkali-free borosilicate glass and PDP plasma glass and TFT represented by the German company Alkali-free borosilicate glass the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa, sec) is 1760 ° C, it can be seen that the melt viscosity temperature of the present invention is 90 ° C - 280 ° C lower than;
- the actual homogenization bubble density temperature of the glass of the invention is 1370 ° C -1490 ° C when the temperature is 10 2 (Pa ⁇ s), and the building fireproof alkali-free borosilicate glass and PDP plasma borosilicate glass represented by the German company TFT alkali-free borosilicate glass, the actual homogenization bubble viscosity temperature 10 2 ⁇ ° (Pa ⁇ s) is 1620 ° C, the actual homogenization bubble viscosity temperature of the present invention, 130 ° C -250 ° C lower than .
- the low-viscosity glass of the present invention can replace the high-viscosity of the prior art, and the building fire-proof alkali-free borosilicate glass and PDP plasma borosilicate glass and TFT alkali-free borosilicate glass can be greatly reduced.
- Energy consumption, energy saving costs especially in the face of high-speed development: building doors, windows, curtain wall fireproof glass, B furniture glass, C car and ship fireproof glass, D high-speed fireproof glass, E rework tempering Fireproof glass and hollow fireproof glass and coated fireproof glass, energy saving involves a large area;
- the low-viscosity glass of the present invention can replace the high-viscosity building fire-resistant alkali-free borosilicate glass and PDP plasma borosilicate glass and TFT alkali-free borosilicate glass represented by German nitrite.
- the invention is suitable for glass having a high degree of flatness, especially for products having a thickness of 1.1 awake - 0. 7 legs or 0.5 ⁇ ; If you want to be high, you can't have stones that are not melted, so you need high melting viscosity. Otherwise, the defects are obvious and the product is unqualified. Then, the product is homogenized and the foaming viscosity is high.
- the bubble row is not clean.
- the higher the light transmittance of the flat glass products the higher the molding temperature and viscosity requirements, because there is a flaw in the float molding.
- Flat, leveling process if the viscosity is high, it will be too thick and smooth, affecting the output, and also due to the thickness and unevenness of the leveling and leveling process
- the thickness and the unevenness of the surface of the product forming the polishing and thinning process are also large, and the surface of the product has wavy defects; therefore, the present invention solves the PDP plasma borosilicate glass and the TFT alkali-free borosilicate electronic grade flat glass.
- the quality problems of the products and the improvement of the product quality are obvious and significant.
- the invention name is "a kind of Application of flat glass in flat glass with high annealing point, high flatness, low viscosity and environmental protection characteristics, display method, photovoltaic solar device and preparation method thereof and display screen", application number is
- the content of silicon oxide is 2.11 times - 4, 56 times or 4, 57 times - 5, 48 times of the calcium oxide content, and the selection is For the calcium oxide content which is easy to lead to crystallization, the innovative selection of this technical element range of inventions (rather than the prior art 1.9 times -4.1 times) is also an alternative invention outside its scope;
- the upper limit of the alumina content is selected to be 35%, that is, 13.6% - 35% (instead of the prior art alumina content of 0. 01-39%), which is within a narrow range of its range.
- the technical solutions of the above new technologies have found new comprehensive material properties in the use of flat-panel glass: A.
- the crystallization temperature of the crystallization temperature of the prior art of the present inventors is relatively low;
- the boron component is omitted, it has excellent thermal expansion coefficient properties, so it can replace various boron glass.
- the building fireproof alkali-free borosilicate glass represented by German Nitute Company and the PDP plasma borosilicate glass of Japan Asahi Glass and the non-alkali of the United States Corning TFT.
- the technical solution of the new technology shows that the crystallization temperature is lower than the molding temperature.
- the prior art solution of the present inventors shows that the crystallization temperature is higher than the molding temperature.
- the inventor's prior art solution many products have higher crystallization temperature than the molding temperature, which is a major defect; this has a certain influence on the molding, so that the granulation, flat drawing and calendering processes are especially in the process of calcium sodium flat glass.
- the viscosity is 10 3 ⁇ 8 (Pa ⁇ s)
- the temperature is 900 ° C
- the crystallization temperature of the calcium soda glass is very low in the critical stage of pulling up from the cooling chamber of the bath.
- the molding temperature is 10 3 ⁇ ° (pa*s), and is also lower than the actual molding temperature of 10 3 ⁇ 8 (Pa ⁇ s) 900 °C.
- the viscosity thereof is lower than 10 3 ⁇ 8 (Pa ⁇ s); and the glass of the patented invention technology of the application No. 201110060944.
- A or the molten glass is high in crystallization temperature, higher than 10 3 D (Pa ⁇ s) before forming to the real 10 3 ⁇ 8 (Pa ⁇ s) of the bubble-cooling work
- the time of stay will be insurmountable for 4-6 hours, and it is certain that some of the glass will devitrify during this period
- B or in order to prevent crystallization and devitrification, the actual cooling on the discharge part
- the drawing temperature is higher than the crystallization temperature, which is much higher than the forming temperature of 10 3 ° (Pa ⁇ s), which will be due to the fluidity of the glass being too clean, too low, or too low.
- the inventor's prior art invention is entitled "a glass plate in a flat glass containing a high annealing point, high flatness, low viscosity and environmental protection characteristics, a flat glass, a preparation method, a display screen, a photovoltaic solar device and a preparation method thereof
- the patented invention with the application number of 201110060944. 4, because of the main defects of high crystallization temperature, in the lattice process, the flat drawing and the calendering process, the large-scale production with quality guarantee and quality guarantee cannot be realized normally. , the formation of the puzzle.
- the crystallization temperature of the prior art solution of the present inventors is solved to be low, and the material property can be solved.
- the prior art has a problem of high crystallization temperature.
- the flat glass of the present invention does not contain a boron oxide component.
- the prior art borosilicate has a new high level of thermal expansion coefficient: the coefficient of thermal expansion of the glass is between 400 ° C and 620 ° C per 100 ° C. The difference is 1. 0 - parts per million, or the difference between the values of the coefficient of thermal expansion of the glass at 400 ° C - 700 ° C per 100 ° C, for a hundred 1. 1 million parts per million. 0. It can overcome the technical problems of calcium-sodium flat glass. It can replace calcium-sodium flat glass as fire-proof glass, provide fire safety for buildings, and also have PDP plasma boron. The nature of the glass application has produced significant technical effects.
- Comparative document Comparative prior art JP11-240734 A, Example 3 thereof. :
- the present invention is an omission of the cosolvent (sodium ten potassium), breaking the existing flat Glass technology must use the technical bias of boron, sodium and potassium cosolvent components when the aluminum content is above 15%;
- the technical solution of the present invention breaks the existing flat glass technology, and when the aluminum content exceeds 15%, the viscosity temperature is too high, and the large-scale production of the flat glass technology cannot be realized, especially the flat glass technology cannot be overcome. Difficulties in the process; when the aluminum content exceeds 15%, the addition of boron, sodium, potassium cosolvent components can not achieve the technical bias of large-scale production of flat glass technology;
- the technical scheme of the invention finds that the high aluminum content is 8, 6-30% or 17%-30% or 21% when the boron, sodium and potassium cosolvent components are not contained (the invention is omitted for boron oxide and potassium oxide and sodium oxide). Or 24% or 28%, high aluminum eutectic properties of aluminum, silicon, calcium, magnesium; especially from the six examples of the present invention, in the absence of boron, sodium, potassium cosolvent components (for boron oxide) And potassium oxide and sodium oxide omitting the invention), when the alumina content is 17-28% or 20% or 24% or 28%, the long-span change, the prior art considers the viscosity temperature, especially the melting and the bubble viscosity The temperature will rise sharply, but when the alumina content of the present invention is 17-28% or 20% or 24% or 28%, the melting temperature and the bubble viscosity temperature change. Only 30 ° C -60 ° C (see 6 examples of the invention);
- the alumina content is only 12%
- the actual melting viscosity temperature is 10 1 S (Pa ⁇ s)
- the temperature is 1750 ° C viscosity temperature
- the actual homogenization exhaust When the foam viscosity temperature is 10 2 (Pa ⁇ s), it is 1630 ° C;
- the alumina content is 22%
- the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa*s)
- the temperature is 159 CTC viscosity temperature
- the actual homogenization bubble viscosity temperature is 10 2 (Pa *seconds) is 1425 ° C;
- the invention in the absence of boron, sodium, potassium cosolvent components, the elements of silicon, calcium and magnesium at a high aluminum content of 8, 6 - 30% or 17% - 30%
- the technical solution of the range of proportional relationship can produce a new eutectic property of aluminum, silicon, magnesium and calcium with high alumina content, which can overcome the difficulty of the largest melting and bubble discharging process in the flat glass technology.
- unexpected technical effects of a low viscosity temperature of high aluminum content and unexpected unexpected effects of high quality and high strength are produced.
- the invention can increase the alumina content by 17-28%, and the strength can reach about 120-160 MPa or 180 MPa, which is twice the strength of the prior art TFT flat glass and fireproof flat glass;
- the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s) and the temperature is 1750 ° C viscosity temperature; actual homogenization When the bubble viscosity temperature is 10 2 (Pa ⁇ s), it is 1630 ° C; but in the first embodiment of the present invention: the actual melting viscosity temperature is 10 1 ' 5 (Pa ⁇ s), the temperature is 1590 ° C viscosity temperature, practical The homogenization bubble viscosity temperature is 1225 ° C when the temperature is 10 2 (Pa ⁇ s);
- the technical solution of the present invention is lower than the actual melting viscosity temperature of the prior art and the actual homogenization bubble viscosity temperature of the TFT glass and the fireproof glass of the boron-containing cosolvent component in the absence of the boron, sodium and potassium cosolvent components.
- ° C -200 ° C has a large energy-saving technical effect; and the technical effect of improving the quality of the flat glass due to the low melting temperature of the melting point; and the reduction of the bubble rate due to the low viscosity of the bubble discharge The technical effect of quality.
- Comparison document Compared with the prior art TW201144249A, it is a completely different technology for making glass fiber from the field of flat glass technology.
- the comparative document discloses a method for glass fiber, and the invention is a flat glass, which has industry standards in various countries in the world, and China also has national industry standard provisions; in international national standards and Chinese national standards, the thickness difference and light There are also standards for transmittance; there are also provisions for the determination of thickness difference and light transmittance; and in the international standards for flat electronic glass and Chinese national standards, there are also provisions for the waviness in the distance between every 20 dishes in the surface.
- the present invention relates to a flat glass, and more particularly to a flat glass having a low coefficient of thermal expansion and a manufacturing process thereof.
- the scope of the field is: (1) building doors, windows, curtain wall panels, (2) flat glass for automobiles and ships, (3) flat glass for high-speed rail, (4) flat panel glass for LCD display, (5) PDP display Screen flat glass, (6) TFT display flat glass and high-strength panel flat glass for smart phones and iPad, (7) process flat glass and other products and reworked flat glass tempered products, (8) LCD flat glass, (9) Photovoltaic solar device flat glass. 3 ⁇ The thickness of the glass is less than 0. 3mm.
- sample samples of the new use of the flat glass according to the present invention are made into a sample having transparent characteristics and conforming to the transparent characteristics required in the field of flat glass, and the visible light transmittance of the glass is all 40%-95% (according to GB/ T268 Q specifies the determination).
- Claim 1 of the present invention indicates that the coefficient of thermal expansion of the glass is from 400 ° C to 630 ° C or from 400 ° C to 700 ° C.
- the difference between the values at both ends of 100 °C is within 1-3 parts per million; the nature of the new expansion coefficient found should be determined, and the unexpected technical effect produced -
- the thermal expansion coefficient of the glass can reach 400 °C -630 °C. Or the difference between the values of the two ends per 100 ° C of 400 ° C - 700 O, within 1-3 parts per million
- the invention can omit the invention of the boron component, and finds the technical solution of the invention without boron component, has low thermal expansion coefficient property, can produce TFT liquid crystal display glass and fireproof explosion-proof flat glass without boron component, PDP plasma Boron glass; therefore, it can completely solve the boron gas emission in the current production of boron glass (for example, when the boron content in the product is 10%, about 30% of boron is added to the raw material, and about 20% of boron is emitted during melting.
- Volatile gas volatilization such as the prior art 10 ton / day overflow process
- 2 tons of boron gas is discharged every day, such as 200 tons / day capacity
- 200 tons of the technical solution of the present invention / Day of the float line can be without any boron gas emissions, can overcome the environmental problems caused by the above-mentioned flat boron glass, which involves a wide range of industries (large amount of boron gas volatilization in production);
- the invention of the boron component of the present invention has found that the technical solution of the present invention has a boron-free composition, has a low thermal expansion coefficient property, and can replace not only the prior art PDP plasma borosilicate glass and TFT having low thermal expansion coefficient properties.
- Alkaline boron glass electronic grade flat glass and fireproof borosilicate glass and it will also produce significant technical effects that greatly reduce the maintenance cost of the production line and greatly increase the efficiency of the production line and increase the production capacity.
- boron glass is severely corroded at high temperature due to the refractory material of the production equipment, and the production equipment must be shut down for maintenance in 1 to 2 years; and the present invention has found the technical solution of the present invention without boron content due to the omission of the boron component.
- the absence of boron component causes severe corrosion of the refractory material of the production equipment at high temperatures, and the production equipment can be normally shut down for maintenance of 8-10.
- TW201144249A with outstanding substantive features and significant progress, is creative.
- the alumina content is 8, 6-35 or 1-35% or 21-35%, exceeding 13 and 5% of the example 2.
- the present invention also emphasizes the discovery of high aluminum content.
- New properties of co-solvent of aluminum, silicon, calcium and magnesium and new properties of low viscosity temperature therefore, in new applications for flat glass, fire-resistant borosilicate glass, especially for low thermal expansion coefficient properties, provides fire safety for buildings, and It can be used as a new application of TFT liquid crystal glass with low thermal expansion coefficient properties, and can be used as a new application of PDP plasma borosilicate glass with low thermal expansion coefficient properties, resulting in remarkable technology. Effect:
- the invention omits the boron component of the present invention.
- the present invention has new properties of co-solvent of aluminum, silicon, calcium, magnesium and low viscosity temperature new properties under the condition of boron-free component and high aluminum content.
- Prior art PDP plasma borosilicate glass and TFT alkali-free borosilicate glass electronic grade flat glass and fireproof borosilicate glass under high aluminum content conditions - the actual melting viscosity temperature of the glass of the invention is 10 5 (pa * sec) at a temperature of 1480 °C-1690°C, and building fireproof alkali-free borosilicate glass and PDP plasma glass and TFT alkali-free borosilicate glass represented by German Nate, the actual melting viscosity temperature is 10 1 ⁇ 5 (Pa ⁇ s) is 1760° C, it can be seen that the melt viscosity temperature of the present invention is lower than 90 ° C - 280 ° C; the actual homogenized bubble viscosity temperature
- the second invention has a significant technical effect: the invention is very suitable for flatness, glass with high degree of glass lining, especially for the ultra-thin electronic glass of the thickness of 1. 1mm- 0. 7mm or 0.5.
- Product first of all The product is melted to a high level, and there must be no stones formed by the infusibility.
- the melt viscosity is required to be high, otherwise the defects are obvious and the product is unqualified; then, the product is homogenized and the foaming viscosity is high, otherwise the bubble row is not Clean, also in the glass will be obvious, resulting in product failure, and the less micro-bubbles, the flat glass product transmittance water quality will be higher; especially the molding temperature viscosity requirements are also high, because there is A flat, leveling process, if the viscosity is high, it will be too thick and slow, affecting the yield, and will also affect the formation of polishing and pulling due to the thickness difference and unevenness of the leveling and leveling process.
- the thickness of the surface of the product in the thin process stage is also large, and the unevenness of the surface of the product is also large, and the surface of the product has a waviness defect; therefore, the present invention is particularly suitable for the glass product of the electronic display of the thickness of 1. 1 dish - 0. 7 or 0.5 mm.
- the improvement of product quality has significant technical effects.
- New properties found are unknown properties before the present application; Unexpected technical effects arising from newly discovered properties in the technical fields of different uses; then, according to the patent examination guide, Part 2, Chapter 4, 5, the content of the new use invention of the product, the present invention is also A transfer-use invention is not obvious, and has outstanding substantive features and significant progress. Creative.
- the flat glass of the present invention and the manufacturing process thereof provide a new technical solution for the flat glass: a technical solution adopting a proportional relationship of the changed technical elements (including the thermal expansion coefficient property);
- the use of a boron- or fluorine or phosphorus or antimony component that is used in flat glass applications has been omitted from the invention (including the properties of thermal expansion coefficient).
- This technical solution has never been used in flat panels.
- the technology discloses or reveals; in particular, flat glass products and processes reveal the most important properties of thermal expansion coefficient, viscosity and temperature properties of melting and degassing and clarification process stages, and new technical solutions.
- the present invention is not an afterthought that can be derived by simple logical reasoning or simple experimentation; the invention of the invention for use in flat glass applications, especially fireproof borosilicate glass, and the use of TFT liquid crystal borosilicate glass and PDP plasma borosilicate glass.
- the boron glass has a low thermal expansion coefficient and a higher flexural strength, resulting in: energy saving, improved production efficiency, reduced cost, and environmental protection effect of boron poison gas emission.
- Improve the quality of electronic glass, and the glass that can be produced due to the increase in flexural strength can be light, thin, 5-3 times energy-saving, resource-saving, saving logistics, storage 2 - 3 times the unexpected technical effect;
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Abstract
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CN201210181037.X | 2012-06-05 | ||
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PCT/CN2013/000509 WO2013181924A1 (zh) | 2012-06-05 | 2013-05-06 | 一种具有低热膨胀系数的平板玻璃及其制造工艺 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1209244A (en) * | 1967-04-05 | 1970-10-21 | Owens Corning Fiberglass Corp | Glass composition |
US3901716A (en) * | 1973-02-02 | 1975-08-26 | Nat Res Dev | Micro-crystalline material and method of preparation |
US6340647B1 (en) * | 1998-04-17 | 2002-01-22 | Nippon Sheet Glass Co., Ltd. | Glass composition and substrate for information recording media comprising the same |
JP2002220256A (ja) * | 2001-01-22 | 2002-08-09 | Asahi Glass Co Ltd | 無鉛ガラス、電子回路基板用組成物および電子回路基板 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2727399B1 (fr) * | 1994-10-13 | 1997-01-31 | Saint Gobain Vitrage | Compositions de verre silico-sodo-calciques et leurs applications |
US6949485B2 (en) * | 2000-06-01 | 2005-09-27 | Asabi Glass Company, Limited | Glass for substrate and glass substrate |
FR2870842B1 (fr) * | 2004-05-27 | 2007-11-02 | Saint Gobain | Procede et dispositif de fabrication du verre et produits obtenus a l'aide de ce procede |
-
2013
- 2013-05-06 CN CN201310161552.6A patent/CN103232160B/zh active Active
- 2013-05-06 WO PCT/CN2013/000509 patent/WO2013181924A1/zh active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1209244A (en) * | 1967-04-05 | 1970-10-21 | Owens Corning Fiberglass Corp | Glass composition |
US3901716A (en) * | 1973-02-02 | 1975-08-26 | Nat Res Dev | Micro-crystalline material and method of preparation |
US6340647B1 (en) * | 1998-04-17 | 2002-01-22 | Nippon Sheet Glass Co., Ltd. | Glass composition and substrate for information recording media comprising the same |
JP2002220256A (ja) * | 2001-01-22 | 2002-08-09 | Asahi Glass Co Ltd | 無鉛ガラス、電子回路基板用組成物および電子回路基板 |
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