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Preparation method for TFT-LCD substrate glass

A substrate and glass technology, which is applied in the introduction method and glass preparation field, can solve the problems of high melting temperature and high glass viscosity, and achieve the effects of lower annealing temperature, short holding time and low thermal expansion coefficient

Inactive Publication Date: 2018-01-19
(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

[0004] SrO (strontium oxide) is the most widely used alkaline earth metal oxide in TFT-LCD substrate glass. At present, the particle size of strontium carbonate (strontium oxide precursor) raw materials used in substrate glass is basically above 3 μm, and the glass has a high viscosity and a melting temperature. higher

Method used

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  • Preparation method for TFT-LCD substrate glass
  • Preparation method for TFT-LCD substrate glass
  • Preparation method for TFT-LCD substrate glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides a method for introducing glass strontium on a TFT-LCD substrate and a method for preparing the glass, comprising the following steps:

[0028] S1. Configure glass raw materials. The glass raw materials mainly contain the following components (wt%): 65SiO 2 -15Al 2 o 3 -6B 2 o 3 -4CaO-4MgO-6SrO, additionally add suitable clarifying agent. Weigh the glass raw material SiO according to the above glass composition 2 、Al 2 o 3 , B 2 o 3 , CaCO 3 , MgCO 3 and nano-SrCO 3 , respectively 325g, 75g, 30g, 35.7g, 41.8g and 42.7g, the above glass raw materials are all chemically pure as raw materials except nano strontium carbonate.

[0029] S2. Fully mix the glass raw material in step S1 evenly, and add it into a platinum crucible.

[0030] S3. Put the platinum crucible in step S2 in a box-type silicon-molybdenum rod high-temperature electric furnace to melt according to the set temperature system, (1) set an appropriate heating rate to increase...

Embodiment 2

[0036] The invention provides a method for introducing glass strontium on a TFT-LCD substrate and a method for preparing the glass, comprising the following steps:

[0037] S1. Configure glass raw materials. The glass raw materials mainly contain the following components (wt%): 65 SiO 2 -15Al 2 o 3 -6B 2 o 3 -3CaO-4MgO-7SrO, add a suitable clarifying agent. Weigh the glass raw material SiO according to the above glass composition 2 、Al 2 o 3 , B 2 o 3 , CaCO 3 , MgCO 3 and nano-SrCO 3, respectively 325g, 75g, 30g, 26.7g, 41.8g and 49.8g, the above glass raw materials are all chemically pure as raw materials except nano-strontium carbonate. Steps S2-S4 are the same as those in Embodiment 1. Finally, high alumina alkali-free borosilicate glass is obtained. The glass is then tested for high-temperature viscosity, thermal expansion, and density.

[0038] The melting temperature in step S3 is 1660° C., and the melting holding time is 2 hours.

[0039] The annealing ...

Embodiment 3

[0044] The invention provides a method for introducing glass strontium on a TFT-LCD substrate and a method for preparing the glass, comprising the following steps:

[0045] S1. Configure glass raw materials. The glass raw materials mainly contain the following components (wt%): 65SiO 2 -15Al 2 o 3 -6B 2 o 3 -2CaO-4MgO-8SrO, additionally add a suitable clarifier. Weigh the glass raw material SiO according to the above glass composition 2 、Al 2 o 3 , B 2 o 3 , CaCO 3 , MgCO 3 and nano-SrCO 3 , respectively 325g, 75g, 30g, 17.8g, 41.8g and 57g, the above glass raw materials are all chemically pure as raw materials except nano strontium carbonate. Steps S2-S4 are the same as those in Embodiment 1. Finally, high alumina alkali-free borosilicate glass is obtained. The glass is then tested for high-temperature viscosity, thermal expansion, and density.

[0046] The melting temperature in step S3 is 1660° C., and the melting holding time is 2 hours.

[0047] The anneal...

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Abstract

The invention discloses a preparation method for TFT-LCD (Thin Film Transistor Liquid Crystal Display) substrate glass. The TFT-LCD substrate glass comprises the following components: SiO2, Al2O3, B2O3, CaO, MgO and SrO, and the method is characterized in that nano strontium carbonate replaces chemically pure SrCO3 which is originally adopted by SrO to be used as a raw material, the glass raw materials are mixed fully and uniformly, and the mixed material is added into a platinum crucible; the melting temperature is 1660 DEG C; the heat preservation time is 2h; iron-plate casting molding is performed under the melting temperature; and annealing is performed at the temperature of 650 DEG C, cooling is performed to a room temperature with a furnace, and finally the high-aluminum alkali-freeborosilicate glass is obtained. The TFT-LCD substrate glass provided by the invention has the beneficial effects that the high-temperature viscosity of the glass is reduced, the melting point is reduced from 1671 DEG C to 1651 DEG C, and the energy-saving effect is remarkable. The coefficient of thermal expansion in the range of 20-300 DEG C is also reduced slightly and is reduced from 40x10<-7> / DEG C to 36x10<-7> / DEG C, and the density of the glass is about 2.5g / cm<3>.

Description

technical field [0001] The present invention relates to the electronic information liquid crystal display industry, and is a substrate glass for TFT-LCD (Thin Film Transistor Liquid Crystal Display), specifically a method for introducing strontium on TFT-LCD substrate glass and a method for preparing the glass . Background technique [0002] The TFT-LCD substrate glass of the present invention belongs to high-alumina alkali-free borosilicate glass, which is widely used in electronic products such as mobile phones, flat panels, and televisions. With the development of the electronic information industry, the demand for TFT-LCD substrate glass also increasing. However, the substrate glass was once monopolized by foreign companies such as Corning and Asahi Glass, and the domestic demand for high-generation substrate glass relied on imports. So far, the 8.5th generation TFT-LCD substrate glass still relies on imports, so substrate glass urgently needs to be developed. Substrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C1/00C03B5/225
Inventor 彭寿马立云韩娜曹欣刘灿
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD