Alkali-free glass for flat-panel display and founding process thereof

Abstract

The invention discloses alkali-free glass for a flat-panel display and a founding process thereof. The glass comprises the following components in percentage by mass: 54-68 percent of SiO2, 10.8-17.1 percent of Al2O3, 7.6-12.5 percent of B2O3, 0.2-1.8 percent of MgO, 4.2-15 percent of CaO, 0.6-7.1 percent of SrO, 0.1-5 percent of BaO, 0.2-1 percent of ZnO, 0.1-1.54 percent of ZrO2 and 0.1-1.3 percent of SnO+SnO2. The alumina borosilicate glass does not contain arsenic and stibium with larger environment pollution, reduces the content of gas impurities in the glass by a specific process and improves the glass quality.

Description

Technical areas: [0001] The invention belongs to the field of glass and relates to an alkali-free boroaluminosilicate glass, in particular to a boroaluminosilicate glass used for flat panel displays. Background technique: [0002] A liquid crystal display (LCD) is formed by sealing liquid crystal between two glass substrates, and the liquid crystal displays by applying voltage. The substrate has two functions. The first is to maintain a certain thickness of the liquid crystal; the second is to carry the transparent electrodes and switching elements necessary for driving. The two substrate glasses have a strict size interval of 5-10 μm. [0003] In order to cope with the technological development of LCD, the substrate glass has various differences in composition, manufacturing methods and characteristics. LCD has very strict requirements on the properties of the substrate glass itself and the quality of the flat panel. LCD's requirements for substrate glass are as follows. ...

AI Technical Summary

Problems solved by technology

However, this process has high requirements on the control of the production process. The flow rate, temperature, and tension of the clamping machine must be controlled synchronously and accurately. A slight change may cause the excessive tension of the clamping machine to break the glass plate.

However, once the breakage of the glass plate occurs, it often takes a long time to re-lead the plate, etc., which reduces the production efficiency and production yield rate.