Glass for liquid crystal display and manufacture method thereof

A liquid crystal display and glass technology, applied in the field of glass manufacturing, can solve problems such as products that have not yet appeared, and achieve the effects of high elastic modulus, low glass density, and easy melting

Active Publication Date: 2013-08-14
南京微芯华谱信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the existing substrate glass manufacturing process, products that fully meet the above requirements have not yet appeared

Method used

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  • Glass for liquid crystal display and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a kind of substrate glass that liquid crystal display is used, and this glass is prepared by weight percentage (wt%) with following each raw material: 58-64SiO 2 , 8-15B 2 o 3 , 12-16Al 2 o 3 , 5-9MgO, 6-8CaO, 2-4BaO, 1-4Y 2 o 3 , 0.005-0.1R 2 O (R=Li, Na or K), and 0-2SnO 2 and\or 0-0.5CeO 2 and\or 0-1Cl. Among them, 0-2SnO 2 , 0-0.5CeO 2 , 0-1Cl is the clarifying agent, at least one of the three can be selected according to needs.

[0024] The glass prepared with the above ingredients and percentages has a density less than 2.38g / cm 3 , the average linear expansion coefficient in the range of 20-300°C is greater than 31×10-7 / °C, less than 39×10-7 / °C, preferably less than 38×10-7 / °C; the strain point is greater than 650°C, preferably not less than 660 ℃; elastic modulus greater than 7.3kg / mm 2 , preferably greater than 7.4kg / mm 2 , more preferably greater than 7.5kg / mm 2 , the glass is especially suitable for the manufacture of f...

Embodiment 2

[0035] In a preferred embodiment of the present invention, the following method is used to manufacture display glass.

[0036] The glass is formed by the conventional float glass process, and the specific manufacturing method is as follows: figure 1 Shown:

[0037] Step 101, proportioning the raw materials for making glass. The glass batch material of the liquid crystal display substrate glass contains quartz sand, alumina, boric acid, calcium carbonate, barium carbonate and mixed rare earth oxides, and the weight percentage of the basic glass oxide is: 60SiO 2 、9B 2 o 3 , 12Al 2 o 3 , 7MgO, 6CaO, 3BaO, 1.5Y 2 o 3 , 0.005R 2 O (R = Li, Na or K), 1SnO 2 , 0.45CeO 2 .

[0038] Step 102, glass melt flow melting control. The melting time of the glass flow is controlled to be about 6-8 hours. The melting temperature in the melting pool is 1550°C, the clarifying and homogenizing temperature is 1590°C, the molding temperature is 1240°C, the liquidus temperature is 1130°C,...

Embodiment 3

[0042] The preparation method of the glass is the same as in Example 2, the difference is that the glass basic oxide component content of the liquid crystal display substrate glass is different, and the weight percentage of the basic glass oxide is: 58SiO 2 、10B 2 o 3 , 13Al 2 o 3 , 6MgO, 7CaO, 2.5BaO, 2Y 2 o 3 , 0.1R 2 O (R = Li, Na or K), 1SnO 2 , 0.4CeO 2 .

[0043] The performance indicators of the prepared LCD substrate glass are as follows: (1) Strain temperature: 670°C (2) Average linear thermal expansion coefficient (α20~300°C): 37×10-7 / °C (3) Density: 2.377g / cm3 (4) The modulus of elasticity is 7.5kg / mm2, the glass is especially suitable for manufacturing flat panel display substrate glass.

[0044] Among them, the density ρ of the glass is measured by the Archimedes method; the thermal expansion coefficient at 20-300°C is measured by a dilatometer, expressed as an average expansion coefficient; the strain point of the glass is measured by the bent beam metho...

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Abstract

The invention discloses a glass for a liquid crystal display and a manufacture method thereof. The glass comprises components of, by weight, 58-64% of SiO2, 8-15% of B2O3, 12-16% of Al2O3, 5-9% of MgO, 6-8% of CaO, 2-4% of BaO, 1-4% of Y2O3, 0.005-0.1% of R2O (R=Li, Na or K) and 0-2% of SnO2 and / or 0-0.5% of CeO2 and / or 0-1% of Cl. The invention also discloses two preparation methods of the glass for the liquid crystal display. The glass for the liquid crystal display and the manufacture method thereof provided by an embodiment of the invention can completely satisfy manufacturing engineering requirements on a substrate glass of a display screen of a liquid crystal display, according to analysis on various physiochemical performances. Compared with an existing substrate glass, the glass for a liquid crystal display of the invention is simply prepared, has easily melted, clarified and homogenized molten glass, lower density, higher modulus of elasticity and advantages of high compliance, low expansion coefficient and chemical resistance and contains no alkali in a raw material. Therefore, the substrate glass of the liquid crystal display is suitable for large-scale float process production.

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a method for manufacturing glass for liquid crystal displays. Background technique [0002] In a highly information-based society, with the rapid popularization of notebooks, tablet computers, digital cameras, mobile phones and related electronic equipment, liquid crystal displays play an increasingly important role in them, with thinner, flatter, full-color and LCD products with high color contrast will be more accepted by the market. [0003] Liquid crystal display substrates usually consist of sheets of glass, known as substrate glass, which must meet very high manufacturing standards. Factors to be considered in manufacturing liquid crystal display substrate glass are: [0004] (1) It has a high glass strain temperature, so that the substrate glass is transformed into a high thermal stability; [0005] (2) It has a closer thermal expansion coefficient to silicon crystals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/095C03C3/11
Inventor 杜寰韩郑生林斌
Owner 南京微芯华谱信息科技有限公司
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