Composition of touch control cover glass

Abstract

The invention discloses the composition of a touch control cover glass. The touch control cover glass comprises the following components in percentages by weight: 64%<=SiO2<=69%, 7%<=Al2O3<=11.5%, 1.5%<=B2O3<=2.5%, 4.5%<=MgO<=7.5%, 0%<CaO<=2.5%, 0%<ZnO<=2%, 0%<ZrO2<=0.2%, 0%<TiO2<=1%, 14.5%<=Na2O<=16.5%, 1%<=K2O<=4%, and 0%<SnO2<=0.4%, wherein preferably the total content of CaO and MgO should be in a range of 4.5% to 10%, and the total content of Na2O and K2O should be in a range of 15.5% to 20.5%. The preparation method of the touch control cover glass comprises the following steps: melting the components mentioned above to form touch control cover glass, and then soaking the touch control cover glass in a high-temperature KNO3 solution to carry out ion exchange so as to replace the sodium ions (smaller in volume) in a certain depth of the surface layer of the touch control cover glass with potassium ions (bigger in volume), wherein during this process, an extruding effect will be generated on the surface layer, and finally a finished product of touch control cover glass, which has the advantages of high strength, wear resistance, and scratch resistance, will be obtained.

Description

technical field [0001] A composition of a touch protection glass (cover glass), the present invention especially refers to a glass with high strength, wear resistance and scratch resistance, and does not contain As 2 o 3 or Sb 2 o 3 Composition of touch protection glass with ingredients harmful to the environment. Background technique [0002] The touch protection glass (cover glass) used on the touch screen and liquid crystal display of portable electronic devices (such as mobile phones, tablets or notebook computers) is aluminosilicate glass, which is treated by ion exchange to Strengthening, this kind of glass contains only a very small amount of alkali metal oxide components, and can be made into glass by forming methods such as float method or down-draw method. [0003] As can be seen from the composition of the glass disclosed in the Taiwan Patent No. I252844, it contains As which is harmful to the human body and the environment. 2 o 3 and Sb 2 o 3 , if differe...

AI Technical Summary

Problems solved by technology

In the glass disclosed in Taiwan Patent No. 200637800, its components must be melted at a high temperature above 1600°C, so it consumes a lot of energy, which is not conducive to reducing production costs

[0006] To sum up, the disclosure of the present invention is how to design an innovative composition of touch protection glass, which can replace As by adding and changing the composition ratio. 2 o 3 or Sb 2 o 3 ingredients that are harmful to the environment, and then produce devitrification-resistant touch protection glass to solve the problem that existing glass does not meet environmental protection standards

Images