High-alkali high-alumina silicate glass suitable for chemical enhanced treatment

Abstract

The invention discloses high-alkali high-alumina silicate glass suitable for chemical enhanced treatment. The glass comprises the following chemical ingredients, by weight, 62-68% of SiO2, 11-16% of Al2O3, 13-18% of Na2O, 1-3% of K2O, 0-2% of Li2O, 1-3% of CaO, 0-3% of B2O3, 0-3% of ZnO, 0.01-1% of TiO2, 0.01-2% of ZrO2 and at least a clarifying agent. The clarifying agent is selected from 0-0.5 wt% of SnO2, 0-0.5 wt% of Sb2O3, 0-1 wt% of F and 0-1 wt% of CeO2. The glass manufactured by the above formula undergoes chemical enhanced treatment in KNO3 molten salt of 420-460 DEG C for more than 5 hours so as to form protective glass with more than 600 MPa of pressure stress formed on the surface and a pressure stress layer of more than 50 microns thick. The protective glass can be applied to mobile devices such as a mobile telephone, a smart phone, a flat computer, a notebook computer and a PDA.

Description

technical field [0001] The invention belongs to the technical field of glass production, and relates to a formula suitable for protective cover glass for mobile devices such as mobile phones, smart phones, tablet computers, notebook computers and PDAs, in particular a high-alkali glass suitable for chemical strengthening High alumina silicate glass. Background technique [0002] With the development of modern display technology, a large number of electronic display products have emerged in the last 10 years, and advanced flat panel display products have emerged in an endless stream, such as: mobile phones, handheld game consoles, LCD TVs, LCD monitors, notebook LCD monitors, cash machines, and print advertising media machines , Multimedia information inquiry machine, etc. [0003] Although the surface of the above-mentioned display products has glass material as a key part of its imaging system, this type of glass has not undergone glass strengthening treatment. In these f...

AI Technical Summary

Problems solved by technology

Acrylic resin organic board is used as the screen protection material. Due to the low Young's modulus of acrylic resin, when pressing with fingers, etc., the acrylic resin substrate may bend and cause poor display.

However, ordinary soda-lime-silicate glass is used as the screen protection material. Due to its low surface strength, the screen is easily scratched after long-term use, resulting in problems such as blurred display, poor effect, and unsightly appearance.

The hardness and mechanical strength of these products are not high, and the surface scratch resistance and impact resistance are not very good, often damaged and the surface is rough, which affects the service life of the whole machine and the display effect of the screen.

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