A kind of alkali-free aluminoborosilicate glass and preparation method thereof

A borosilicate glass, alkali aluminum technology, applied in glass manufacturing equipment, glass molding, manufacturing tools and other directions, can solve problems such as non-compliance with environmental protection requirements, and achieve enhanced glass network structure, easy acquisition, and simple preparation process. Effect

Active Publication Date: 2022-01-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two clarifiers are gradually abandoned because they do not meet the requirements of environmental protection. SnO, SnO 2 Gradually become the mainstream clarifier for substrate glass

Method used

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  • A kind of alkali-free aluminoborosilicate glass and preparation method thereof
  • A kind of alkali-free aluminoborosilicate glass and preparation method thereof
  • A kind of alkali-free aluminoborosilicate glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of alkali-free aluminoborosilicate glass, the mass percentage of glass is: 60.0wt% SiO 2 , 19 wt% Al 2 o 3 , 5.5 wt% B 2 o 3 , 2.0wt%P 2 o 5 , 2.5wt% MgO, 5.5wt% CaO, 5.0wt% SrO, 0.5wt% ZnO, plus 0.2wt% SnO of the total weight of raw materials 2 .

[0041] The preparation method of glass comprises the following steps: 1) calculating the mass fraction of batch materials and the corresponding raw material consumption according to the mass fractions of the above-mentioned oxides, and accurately weighing each raw material according to the proportion; 2) pouring the glass raw material obtained in step 1 into a mortar 3) Put the mixed glass batch into a corundum crucible or platinum crucible or a melting pool, and then melt it at a high temperature of 1650-1680°C for 3 hours; 4) Pour the uniformly melted high-temperature glass liquid into the preheated It is formed in a stainless steel mold, and then transferred to a muffle furnace at 680°C for annealing for 3 h...

Embodiment 2

[0044] A kind of alkali-free aluminoborosilicate glass, the mass percentage of glass is: 60.0wt% SiO 2 , 17.5 wt% Al 2 o 3 , 4.0 wt% B 2 o 3 , 5.0wt%P 2 o 5 , 2.0wt% MgO, 6.0wt% CaO, 5.0wt% SrO, 0.5wt% ZnO, plus 0.2wt% SnO 2 .

[0045] The preparation method of glass comprises the following steps: 1) calculating the mass fraction of batch materials and the corresponding raw material consumption according to the mass fractions of the above-mentioned oxides, and accurately weighing each raw material according to the proportion; 2) pouring the glass raw material obtained in step 1 into a mortar 3) Put the mixed glass batch into a corundum crucible or platinum crucible or a melting pool, and then melt it at a high temperature of 1650-1680°C for 3 hours; 4) Pour the uniformly melted high-temperature glass liquid into the preheated It is formed in a stainless steel mold, and then transferred to a muffle furnace at 680°C for annealing for 3 hours to eliminate the thermal stres...

Embodiment 3

[0048] A kind of alkali-free aluminoborosilicate glass, the mass percentage of glass is: 60.0wt% SiO 2 , 13.5 wt% Al 2 o 3 , 8.0 wt% B 2 o 3 , 5.0wt%P 2 o 5 , 6.0wt% MgO, 4.0wt% CaO, 3.0wt% SrO, 0.5wt% ZnO, plus 0.4wt% SnO 2 .

[0049] The preparation method of glass comprises the following steps: 1) calculating the mass fraction of batch materials and the corresponding raw material consumption according to the mass fractions of the above-mentioned oxides, and accurately weighing each raw material according to the proportion; 2) pouring the glass raw material obtained in step 1 into a mortar 3) Put the mixed glass batch into a corundum crucible or platinum crucible or a melting pool, and then melt it at a high temperature of 1650-1680°C for 3 hours; 4) Pour the uniformly melted high-temperature glass liquid into the preheated It is formed in a stainless steel mold, and then transferred to a muffle furnace at 680°C for annealing for 3 hours to eliminate the thermal stres...

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Abstract

An alkali-free aluminoborosilicate glass and its preparation method, the glass composition contains 50.0-60.0% SiO in mass % 2 , 13.5~23.0% Al 2 o 3 ,4.0~8.0%B 2 o 3 , 2.0~5.0%P 2 o 5 , 2.0-8.0% MgO, 3.0-10.0% CaO, 0.5-5.0% SrO, 0.5-2.0% ZnO, plus SnO 2 The amount is 0.2-1.0wt%. The strain point of the glass prepared by the present invention is 685-742°C, the transformation point is 721-780°C, and the coefficient of thermal expansion is 29.91×10 ‑7 ~33.30×10 ‑7 / ℃, the density is 2.3922~2.4584g / cm 3 , the transmittance in the visible light region is 91.84-92.14%, and the bending strength is 75.0-88.9MPa.

Description

technical field [0001] The invention belongs to the field of glass technology, and relates to substrate glass for flat panel displays and a preparation method thereof, in particular to alkali-free aluminoborosilicate glass with excellent comprehensive performance for TFT-LCDs and a preparation method thereof. Background technique [0002] At present, among many new flat panel display technologies, thin film transistor liquid crystal display (TFT-LCD) has gradually replaced the traditional cathode ray tube (CRT) due to its large display size, good environmental performance, high definition, and light weight. ) display technology has become a mainstream product in the flat panel display technology and even the display market. [0003] The glass substrate for TFT-LCD must have the following performance indicators and technical parameters: [0004] 1) The thermal expansion coefficient of the glass substrate needs to match the silicon material in the thin film transistor array, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/097C03C1/00C03B19/02
CPCC03C3/097C03C1/004C03B19/02
Inventor 卢安贤何茜张家硕
Owner CENT SOUTH UNIV
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