Preparation method of alkali-free boroaluminosilicate glass

A boroaluminosilicate and glass technology, applied in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc., can solve the problems of poor flowability of batch materials, reduced optical properties of glass, difficulty in debubbling, etc., and achieves optical and thermodynamic properties. Improved performance, improved "dusting" effect, and the effect of glass clarification

Inactive Publication Date: 2021-04-02
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the special performance requirements of TFT-LCD substrate glass, there is no alkali metal oxide in the glass batch material, and the alumina content is high, resulting in high viscosity and difficult bubble removal during the glass melting process.
In order to achieve clarification and homogenization of glass, it is necessary to add a large amount of clarifier or increase the temperature of the furnace, but this will undoubtedly affect the performance of the glass (transmittance, refractive index, etc.), and the energy consumption will increase and the cost will increase.
At the same time, the powder is easy to produce "dust" effect when feeding, resulting in a poor working environment; and the temperature of the batch material rises rapidly in the high-temperature furnace, and some low-melting components do not participate in the glass formation reaction and volatilize and erode the furnace body, resulting in long life of the furnace. shorten
[0004] At present, in the prior art, the problems of clarification and "dusting" are mostly solved by pretreatment of batch materials and improvement of batch material components;

Method used

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  • Preparation method of alkali-free boroaluminosilicate glass
  • Preparation method of alkali-free boroaluminosilicate glass
  • Preparation method of alkali-free boroaluminosilicate glass

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] (1). Weigh the glass batch composed of the following weight percentage: 66% SiO 2 , 3% of B 2 o 3 , 16.5% Al 2 o 3 , 11% MgO, 2% CaO, 2% SrO, 0.2% ZrO 2 , 0.25% SnO and 0.05% In 2 o 3 , then add the glass batch material and water into the grinding jar filled with zirconia balls according to the mass ratio of 50:48, and grind for 0.5h; then add 1% PVA and 1% PEG, continue grinding for 2h;

[0027] (2) Put the ground slurry into the feeding trough of the spray granulator, adjust the air inlet temperature to 210°C, the blower frequency to 30HZ, and the induced fan frequency to 42HZ, and feed to prepare batch particles of 200μm;

[0028] (3) Add the prepared batch material particles into a kiln at 1500°C for 1 hour, and then raise the temperature to 1620°C for 3 hours. After the glass is clarified and homogenized, take out the glass liquid, carry out molding and annealing, and then prepare Alkali-free boroaluminosilicate glass.

Example Embodiment

[0029] Example 2

[0030] (1). Weigh the glass batch composed of the following weight percentage: 66% SiO 2 , 3% of B 2 o 3 , 16.5% Al 2 o 3 , 11% MgO, 1% CaO, 2% SrO, 0.2% ZrO 2 , 0.25% SnO and 0.05% In 2 o 3 , then add the glass batch material and water into the grinding jar filled with zirconia balls at a mass ratio of 49:46, and grind for 0.5h; then add 2.5% of the total mass of the batch material and water into the grinding jar, respectively, 2.5% of PVA and 2.5% of the total mass of water PEG, continue grinding for 2h;

[0031] (2) Put the ground slurry into the feeding trough of the spray granulator, adjust the air inlet temperature to 210°C, the blower frequency to 30HZ, and the induced fan frequency to 42HZ, and feed to prepare batch particles of 150 μm;

[0032] (3) Add the prepared batch material particles into a kiln at 1500°C for 1 hour, and then raise the temperature to 1620°C for 3 hours. After the glass is clarified and homogenized, take out the glass l...

Example Embodiment

[0033] Example 3

[0034] (1). Weigh the glass batch composed of the following weight percentage: 63% SiO 2 , 5% of B 2 o 3 , 14% Al 2 o 3 , 13% MgO, 1.5% CaO, 3% SrO, 0.2% ZrO 2 , 0.25% SnO and 0.05% In 2 o 3 , then add the glass batch material and water into the grinding jar filled with zirconia balls according to the mass ratio of 50:48, and grind for 0.5h; then add 1% PVA and 1% PEG, continue grinding for 2h;

[0035] (2) Put the ground slurry into the feeding trough of the spray granulator, adjust the air inlet temperature to 210°C, the blower frequency to 30HZ, and the induced fan frequency to 42HZ, and feed to prepare batch particles of 250 μm;

[0036] (3) Add the prepared batch material particles into a kiln at 1500°C for 1 hour, and then raise the temperature to 1620°C for 3 hours. After the glass is clarified and homogenized, take out the molten glass, carry out molding and annealing, and then prepare Alkali-free boroaluminosilicate glass.

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Abstract

The invention relates to a preparation method of alkali-free boroaluminosilicate glass, which is characterized by comprising the steps of (1) weighing the following batch raw materials in percentage by mass: 58-70% of SiO2, 3-10% of B2O3, 12-18% of Al2O3, 10-15% of MgO, 1-3% of CaO, 2-4% of SrO, 0.1-1% of ZrO2, 0.1-0.2% of SnO and 0.01-0.5% of In2O3, wherein the value of RO (MgO+CaO+SrO) is 13%-18%; (2) mixing the glass batch raw materials, a binder and water according to a mass ratio of (35-60): (1-6): (35-60) to form slurry, adding the slurry into a spray granulator, and adjusting the air inlet temperature to 200-230 DEG C, the air blower frequency to 25-35 HZ and the induced draft fan frequency to 35-45 HZ to prepare 100-500 [mu]m batch particles; and (3) melting and clarifying the batch particles in a high-temperature furnace, molding and annealing. The beneficial effects are that the prepared batch is low in particle density, small and uniform in particle size, good in flowabilityand small in resistance in the feeding process, the batch is prepared into batch particles, then melting is conducted, and the melting time of glass can be shortened.

Description

technical field [0001] The invention relates to the technical field of electronic glass, in particular to a method for preparing alkali-free boroaluminosilicate glass. Background technique [0002] With the rapid development of flat panel information display technology, TFT-LCD (Thin Film Transistor Liquid Crystal Display) technology is widely used in LCD TVs, tablet computers, smart phones, and vehicle displays due to its advantages such as high definition, small size, and good environmental performance. In fields such as industry 4.0 and the upgrading of living standards, emerging industries such as wearable electronic products, artificial intelligence, and smart cities are bound to develop rapidly, which also brings new development opportunities for TFT-LCD technology. As one of the key basic materials of the liquid crystal display industry, TFT-LCD substrate glass has a huge impact on the performance of display products. [0003] Due to the special performance requireme...

Claims

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Application Information

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IPC IPC(8): C03C6/04C03B1/00C03B5/16
CPCC03B1/00C03B5/16C03C1/00
Inventor 彭寿马立云李金威曹欣仲召进王萍萍高强王巍巍赵凤阳韩娜石丽芬柯震坤单传丽倪嘉单发勇秦旭升王雷萌郝志云
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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