Composition of environmental glass used for TFT-LCDs

Abstract

A composition of environmental glass used for TFT-LCDs is disclosed. The environmental glass is used in thin film transistor liquid crystal displays (also known as TFT-LCDs). The environmental glass comprises following components by weight: not more than 63% and not less than 59% of SiO2, not more than 17% and not less than 13% of Al2O3, not more than 14% and not less than 7% of B2O3, not more than 3% and not less than 0.1% of BaO, not more than 3.5% and not less than 0.5% of MgO, not more than 11% and not less than 7% of CaO, not more than 6% and not less than 0.2% of SrO, and not more than 0.4% and not less than 0.05% of SnO2, with the total content of the CaO, the BaO, the MgO, the SrO, and the like being 7.8%-23.5% to the best. Accordingly, the components are melt to form the hard and tough environmental glass used for the TFT-LCDs. Chemical resistance and devitrification resistance of the glass are enhanced and the viscosity and the expansion factor decrease, thus overcoming a problem of insufficient strength and hardness of glass at present and a problem that the glass at present comprises PbO, As2O3 or Sb2O3, and other components harmful to the environment.

Description

technical field [0001] The present invention relates to the composition of an environmentally friendly glass for TFT-LCD, in particular, the present invention refers to a glass structure that can be strengthened to improve its chemical resistance and devitrification resistance, and the composition does not contain PbO, As 2 O 3 or Sb 2 O 3 and other ingredients harmful to the environment, which is conducive to recycling. Background technique [0002] The displays used in mobile electronic devices such as mobile phones and tablet computers are mostly Thin film transistor liquid crystal display, TFT-LCD, which mainly use thin film transistor technology to improve image quality. Basically, a TFT-LCD panel needs to use two Sheets of flat glass are used for the production of integrated circuits and COLOR FILTER sheets respectively. Since the TFT process requires heat resistance, and the alkali component will affect the characteristics of the TFT, generally the flat glass used ...

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Problems solved by technology

[0012] In order to achieve the above-mentioned purpose, the present invention mainly strengthens the structure of the environmentally friendly glass for TFT-LCD by adding and changing the weight percentage of the constituents in the glass composition. The weight percentage of the constituents of the environmentally friendly glass for TFT-LCD is Respectively 59.0%≤SiO 2 ≤63.0%, 13.0%≤Al 2 o 3 ≤17.0%, 7.0%≤B 2 o 3 ≤14%, 0.1%≤BaO≤3%, 0.5%≤MgO≤3.5%, 7%≤CaO≤11%, 0.2%≤SrO≤6% and 0.05%≤SnO 2 ≤0.4%, the total content of BaO, MgO, CaO and SrO and other components is best between 7.8% and 23.5%, so that the aforementioned composition materials can be melted to form tough glass, and SiO 2 Form a network structure in the glass, and borrow Al 2 o 3 Make the glass form a tough surface, thereby increasing the heat resistance and devitrification resistance of the glass, reducing the expansion rate of the glass, and borrowing B 2 o 3 , MgO and CaO reduce the viscosity and expansion coefficient of the glass, and use BaO and SrO to increase the chemical resistance and devitrification resistance of the glass to solve the problem of insufficient strength and hardness of the existing glass for TFT-LCD. 2 to replace PbO, As 2 o 3 or Sb 2 o 3 and other ingredients, as a clarifying agent or defoaming agent when the glass is melted, and then solve the problem that the existing TFT-LCD glass does not meet environmental protection standards, resulting in difficulty in recycling and cannot be reused

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