Chemical reinforced glass for electronic device and preparation method thereof

Abstract

The invention provides chemical reinforced glass for an electronic device and a preparation method thereof. An ideal compression stress layer depth is obtained at relatively low reinforcing temperature and relatively short reinforcing time. The method comprises the following steps: 1) taking raw materials: greater than or equal to 50 percent and less than or equal to 70 percent of SiO2, greater than or equal to 0 percent and less than or equal to 2 percent of B2O3, greater than or equal to 12 percent and less than or equal to 25 percent of Al2O3, greater than or equal to 11 percent and less than or equal to 15 percent of Na2O, greater than or equal to 0 percent and less than or equal to 5 percent of ZnO, greater than or equal to 2 percent and less than or equal to 5 percent of Li2O, greater than or equal to 0 percent and less than or equal to 5 percent of MgO, greater than or equal to 0 percent and less than or equal to 1 percent of ZrO2, greater than or equal to 1 percent and less than or equal to 4 percent of SnO2 and greater than or equal to 0.67 and less than or equal to 0.97 of (Na2O+Li2O)/(Al2O3+ZrO2+MgO); 2) melting and clarifying and carrying out ion change. The surface compressive stress of the reinforced glass is 882.4MPa to 990.5MPa, the surface stress layer depth is 80.5mu m to 96.3mu m, the Vickers hardness is 658kg/mm<2> to 690kg/mm<2> and the strain point temperature is 550.5 DEG C to 572.2 DEG C.

Description

technical field [0001] The invention relates to the technical field of glass manufacturing, in particular to a chemically strengthened glass used in electronic devices and a preparation method thereof. Background technique [0002] Mobile electronic display devices such as mobile phones and PDAs usually contain protective glass. Due to frequent contact and use, the protective glass must have good impact resistance and scratch resistance. However, during the production, processing and use of the glass, a large number of microcracks will occur on the surface. The existence of these microcracks makes the actual strength of the glass much lower than the theoretical strength. It is usually necessary to strengthen the glass surface to generate a compressive stress layer to improve the surface strength of the glass, thereby increasing the impact resistance and scratch resistance of the display device. [0003] At present, there are physical strengthening methods and chemical streng...

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Problems solved by technology

[0005] However, although the strength of the glass has been improved to a certain extent in the prior art, compared with the industry's requirements for high strength at low temperature, high thermal shock resistance and a short strengthening time, an ideal compressive stress layer depth can be obtained There is still a certain gap in the expectation of strengthened glass with high surface compressive stress, so it is still a challenge to study glass preparation methods with low temperature, high strength and excellent performance parameters.

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