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Liquid crystal substrate glass and preparation method thereof

A liquid crystal substrate and glass technology, which is applied in the field of environment-friendly liquid crystal substrate glass and its preparation, can solve the problems of difficult discharge of air bubbles, high viscosity at high temperature, unfavorable glass clarification, etc., and achieves the effect of improving effect, uniform quality and sufficient mixing.

Inactive Publication Date: 2017-11-21
RAINBOW (HEFEI) LIQUID CRYSTAL GLASS CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0017] In order to make alkali-free aluminoborosilicate glass easy to clarify and homogenize at high temperature, the glass formula must contain a part of raw materials that can decompose and release gas when heated, so the alkaline earth metal oxides CaO and SrO in the batch are composed of calcium carbonate and strontium nitrate, but due to the high temperature viscosity of alkali-free aluminoborosilicate glass, the bubbles in the glass melt are not easy to discharge, which is not conducive to the clarification of the glass, so a suitable clarifier must be introduced into the glass formula

Method used

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  • Liquid crystal substrate glass and preparation method thereof
  • Liquid crystal substrate glass and preparation method thereof
  • Liquid crystal substrate glass and preparation method thereof

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preparation example Construction

[0067] A method for preparing an environmentally friendly liquid crystal substrate glass, comprising the following steps:

[0068] Step (1), take by weighing the raw material that comprises quartz powder, aluminum oxide powder, boric acid, calcium carbonate, strontium nitrate, magnesium carbonate, barium nitrate and tin dioxide, mix uniformly, obtain mixed material, will mixed material income material tank (per 450 kg for each material tank), transported to the melting pool furnace;

[0069] Preferably, the quartz powder has a particle size of 0.020-0.150mm, and the purity is not less than 99.5%; the impurity content of tin dioxide is not more than 0.3%;

[0070] In step (2), the above mixture is melted and clarified at 1500-1650° C., and then overflow-drawn to make liquid crystal substrate glass, so that the liquid crystal substrate glass is composed of the following components based on the mass percentage of oxides:

[0071]

[0072]

[0073] and the impurities that a...

Embodiment 1

[0080] Step (1), take by weighing the raw material of quartz powder, aluminum oxide powder, boric acid, magnesium carbonate, calcium carbonate, strontium nitrate, barium nitrate and tin dioxide by the formula of table 1; At first tin dioxide and part quartz powder are according to 1: Add the mass ratio of 9 to the premix system for premixing for 20 minutes, then feed the uniformly mixed premix into the mixer, and mix with the rest of quartz powder, alumina powder, boric acid, magnesium carbonate, calcium carbonate, strontium nitrate, Barium nitrate is added to the mixing system according to the formula ratio, and after 25 minutes of mixing, the mixture is collected into the feed tank (each feed tank has a loading capacity of 450 kg), and is transported to the melting tank furnace;

[0081] In step (2), the mixed material is fed into the pool furnace, and after being melted and clarified at 1600° C., the liquid crystal substrate glass is made by overflow drawing.

Embodiment 2

[0083] The formula is shown in Table 1, the melting and clarification temperature is 1550°C, and the others are the same as in Example 1.

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Abstract

The invention provides liquid crystal substrate glass and a preparation method thereof. The liquid crystal substrate glass consists of the following oxides in percentages by mass: 60.0-65.0% of SiO2, 15.0-18.0% of Al2O3, 8.0-12.0% of B2O3, 6.0-8.0% of CaO, 0.5-2.0% of MgO, 0.5-3.0% of SrO, 0.25-1.30% of BaO, 0.05-0.15% of SnO2 and inevitable impurities. The preparation method comprises the following steps: uniformly mixing the raw materials; melting and clarifying the raw materials and then drawing the raw materials by overflowing to form the liquid crystal substrate glass. The environmentally friendly oxide SnO2 is used as a clarifying agent, alkali metal oxide is not added, and the purpose of eliminating air bubbles on the premise of not polluting the environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal substrate glass, in particular to an environment-friendly liquid crystal substrate glass and a preparation method thereof. Background technique [0002] With the development of flat panel display technology (FPD), thin film transistor liquid crystal display (TFT-LCD) technology is also developing in the direction of environmental protection and energy saving; TFT-LCD products are easy to realize color multimedia display, low operating voltage, energy saving Power, light and thin, high image quality, full color, high definition, high resolution and no radiation, no environmental pollution and many other advantages, has become the mainstream product of flat panel display technology and even the display market. [0003] TFT-LCD substrate glass is the front and rear two key glass materials of the TFT-LCD display panel, which are respectively used as the substrate of the underlying thin film tra...

Claims

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Application Information

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IPC IPC(8): C03C3/091C03C1/00
CPCC03C1/004C03C3/091
Inventor 侯宏荣魏民生白睿
Owner RAINBOW (HEFEI) LIQUID CRYSTAL GLASS CO LTD
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