Prescription of cover plate glass for light touch screen

Abstract

The invention discloses a prescription of a cover plate glass for a light touch screen. Experiments show that the major ingredients of the cover plate glass contain SiO2, Al2O3, Na2O, K2O and CaO, for the glass prepared according to the prescription provided by the invention, the aim of improving the coefficient of thermal expansion is realized by regulating the contents of the ingredients in the prescription, and simultaneously, improving the coefficient of thermal expansion of the glass by using the large proportion of metals containing Ba and Sr is avoided; in the prescription provided by the invention, CaO is selected instead of MgO, the MgO is not added, devitrification tendency of the glass can be lowered, the high-temperature viscosity can be lowered, melting is facilitated, and after being enhanced chemically, the glass can effectively prevent the impact and the scratch damage to the protective screen surface of the touch products, and prolong the service life of the products with touch screens.

Description

technical field [0001] The invention belongs to the technical field of glass production, and relates to a glass composition for a cover, in particular to a formula for a cover glass for a lightweight touch screen. The glass treated by a chemical strengthening method is particularly suitable for use as a cover glass for a touch screen. Background technique [0002] With the continuous development of information technology and display technology and the further reduction of costs, the convenience brought by touch screens has followed, and many domestic enterprises have begun to be interested in touch screen technology. Touch technology and display technology are further combined. In addition to traditional applications such as mobile phones, touch personal computers and smart home appliances will become a new driving force for the development of touch screens. Medium and large size touch panels have been launched one after another. As the size of the product increases, higher ...

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Problems solved by technology

[0003] In the prior art, most products increase the thermal expansion coefficient of the glass by adding metals containing Ba and Sr to the glass composition, but the addition of metals containing Ba and Sr will also increase the specific gravity of the glass at the same time, which cannot satisfy the light weight of the cover glass. Quantitative requirements; at the same time, for the composition and preparation methods of ultra-thin glass, domestic and foreign patents disclose different basic glass components and preparation methods, such as CN200880016095.9, which discloses a chemically strengthened glass that can be drawn. 64-68% SiO by mole fraction 2 , 8-12% Al 2 o 3 , 12-16% Na 2 O, 2-5% K 2 O, 0-3% B 2 o 3 , 4-6% MgO, 0-5% CaO, used for cover glass in mobile electronic devices, which contains more K + Ions, which hinder the rate of chemical strengthening, reducing production efficiency and glass quality

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