A kind of flexible glass suitable for slit down-drawing method and its preparation method

Abstract

The invention discloses flexible glass applicable to the molding by a slit down-drawing method. The flexible glass is prepared from the following components in percentage by mass: 55 to 70 percent of SiO2, 14 to 20 percent of Al2O3, 7 to 14 percent of B2O3, 3 to 12 percent of CaO, 0 to 4 percent of MgO, 0 to 5 percent of SrO, 0 to 2 percent of BaO, 0.1 to 0.2 percent of SnO2 and 0.2 to 2 percent of Y2O3. According to the glass, the melting temperature in a preparation procedure can be decreased; the generation of an air bubble can be reduced; a melt which is more uniform and has no defect is obtained; further, the hardening rate is quick; the flexible glass is applicable to the production by the slit down-drawing method; the produced flexible glass has characteristics of being low in density, high in elasticity modulus, thin in thickness and low in thermal expansion coefficient, and the like; the related preparation process is simple and is low in energy consumption and the popularization and the application are suitable.

Description

technical field [0001] The invention belongs to the technical field of flexible glass, and relates to a flexible glass suitable for a slit down-draw method and a preparation method thereof. Background technique [0002] With the development of science and technology, electronic products are gradually becoming thinner and smarter, especially the development of electronic wearable devices, bendable smartphones and curved surface display technology with a strong sense of reality. In addition to curved surface display technology, foreign companies are developing bendable flexible displays. There are also researchers who plan to study foldable displays, so that some displays can be folded into a small area for portability when not in use, and then unfolded when in use to become a large-area display. This requires the thickness of the display substrate glass to be as thin as possible. [0003] Flexible glass usually refers to ultra-thin glass with a thickness of less than 0.1mm....

AI Technical Summary

Problems solved by technology

Aluminosilicate glass is not suitable for the preparation of lightweight, high-strength flexible glass, but ordinary alkali-free aluminoborosilicate glass has a high aluminum content in the glass, resulting in high melting and forming temperatures, increasing the content of alkaline earth metals and B 2 o 3 It can reduce the melting and molding temperature, but when the content of alkaline earth metal oxide is too high, the glass is easy to devitrify; when B 2 o 3 When the content is too high, it will lead to [BO 3 ] increases, the thermal expansion coefficient of the glass increases and the hardness decreases