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Raw material composition of TFT-LCD substrate glass

A glass raw material and substrate technology, applied in the field of TFT-LCD, can solve problems such as reducing boron volatilization, polluting the environment, affecting glass composition uniformity, glass performance, etc., and achieve the effect of performance improvement

Inactive Publication Date: 2017-10-13
HEFEI HUIKE PRECISION DIE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] TFT-LCD substrate glass is developed on the basis of boroaluminosilicate glass. Adding B2O3 to adjust the performance of the glass is an indispensable component in the glass composition. However, in the glass melting process, boron, fluorine, and fluorine The form of silicic acid (H2SiF6), hydrofluoric acid (HF) and fluoborate volatilizes, and the volatilization amount of boron is 12-15%, which not only affects the uniformity of glass components and the performance of glass, but also pollutes the environment. Visible, Reducing boron volatilization in the production process of TFT-LCD liquid crystal glass substrate has become the focus of attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A TFT-LCD substrate glass raw material composition, each component in the substrate glass is composed of the following mass percentages: silicon dioxide 52%, boron oxide 7%, aluminum oxide 9%, barium oxide 3%, calcium oxide 5%, strontium oxide 7%, tin oxide 6%, zinc oxide 10%, magnesium oxide 3%, zirconium dioxide 4%, rare earth metal oxide 3%.

[0016] The light transmittance of the substrate glass is 91%, the coefficient of thermal expansion at 100°C-300°C is 31-39x10-7°C; the strain point is above 640°C, the density is less than 2.6g / cm3, and the liquidus temperature is lower than 1150 ℃.

[0017] The rare earth metal oxide is lanthanum oxide, yttrium oxide, cerium oxide, samarium oxide, erbium oxide or a combination of two or more of the above five substances.

[0018] The total mass of not more than 1% of beryllium oxide is added to the glass component of the TFT-LCD substrate.

Embodiment 2

[0019] Embodiment 2 A TFT-LCD substrate glass raw material composition, each component in the substrate glass is composed by the following mass percentages: silicon dioxide 58%, boron oxide 11%, aluminum oxide 12%, barium oxide 6%, calcium oxide 8%, strontium oxide 10%, tin oxide 8%, zinc oxide 14%, magnesium oxide 7%, zirconium dioxide 12%, rare earth metal oxide 6%.

[0020] The light transmittance of the substrate glass is 91%, the coefficient of thermal expansion at 100°C-300°C is 31-39x10-7°C; the strain point is above 640°C, the density is less than 2.6g / cm3, and the liquidus temperature is lower than 1150 ℃.

[0021] The rare earth metal oxide is lanthanum oxide, yttrium oxide, cerium oxide, samarium oxide, erbium oxide or a combination of two or more of the above five substances.

[0022] The total mass of not more than 1% of beryllium oxide is added to the glass component of the TFT-LCD substrate.

Embodiment 3

[0023] Embodiment 3 A TFT-LCD substrate glass raw material composition, each component in the substrate glass is composed of the following mass percentages: 55% silicon dioxide, 9% boron oxide, 11% aluminum oxide, 5% barium oxide, calcium oxide 7%, strontium oxide 9%, tin oxide 7%, zinc oxide 12%, magnesium oxide 5%, zirconium dioxide 8%, rare earth metal oxide 5%.

[0024] The light transmittance of the substrate glass is 91%, the coefficient of thermal expansion at 100°C-300°C is 31-39x10-7°C; the strain point is above 640°C, the density is less than 2.6g / cm3, and the liquidus temperature is lower than 1150 ℃.

[0025] The rare earth metal oxide is lanthanum oxide, yttrium oxide, cerium oxide, samarium oxide, erbium oxide or a combination of two or more of the above five substances.

[0026] The total mass of not more than 1% of beryllium oxide is added to the glass component of the TFT-LCD substrate.

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Abstract

The invention discloses a raw material composition of TFT-LCD substrate glass. The substrate glass comprises the following components in percentage by weight: 52-58 percent of silicon dioxide, 7-11 percent of boron oxide, 9-12 percent of aluminum oxide, 3-6 percent of barium oxide, 5-8 percent of calcium oxide, 7-10 percent of strontium oxide, 6-8 percent of stannic oxide, 10-14 percent of zinc oxide, 3-7 percent of magnesium oxide, 4-12 percent of zirconium dioxide and 3-6 percent of rare-earth metal oxide. Compared with the prior art, the raw material composition disclosed by the invention has the benefits that through adding the rare-earth metal oxide, the problem of boron volatilization is effectively controlled, so that the boron volatilization amount is reduced from 12-15 percent to 6-9 percent, and the glass yield is more than 96 percent. In addition, the glass performance is greatly improved, and the thermal expansion coefficient at a temperature of 100-300 DEG C is 31-39 * 10<-7> DEG; the strain point is 640 DEG C or above, and the melting temperature is lower than 1150 DEG C.

Description

technical field [0001] The invention relates to the technical field of TFT-LCD, in particular to a glass raw material composition of a TFT-LCD substrate. Background technique [0002] Since entering the 21st century, flat panel display technology has developed rapidly and gradually replaced traditional CRT (Cathoderay tube, cathode ray tube) display products. Among the many new flat panel display technologies, [0003] TFT-LCD (Thin filmtransistor liquid crystal display, thin film transistor liquid crystal display, also known as AM-LCD (Activematrix liquid crystal display, active matrix liquid crystal display) has become the mainstream color flat panel display technology, TFT-LCD because of its large effective display size, The advantages of high definition, light weight, and good environmental protection performance are gradually recognized by consumers, and are widely used in small terminal display devices such as digital display watches, mobile phones, digital players (su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/04C03C3/095C03C4/00
CPCC03C1/00C03C3/095C03C4/00
Inventor 白航空
Owner HEFEI HUIKE PRECISION DIE CO LTD