Chemically strengthened glass plate and preparation method thereof

Abstract

The invention discloses a chemically strengthened glass plate comprising a surface compressive stress layer and a base layer; the compressive stress layer consists of an outer layer and an inner layer, the inner layer is located between the outer layer and the base layer; the outer layer satisfies the requirements: the outer layer comprises, by the weight percentage based on oxides in the outer-layer, 58-62% of SiO2, 13-16.5% of Al2O3, 2.5-7% of Na2O, 7.8-16.1% of K2O, 5.5-7.1% of MgO, 0-0.9% of ZrO2, 0.005-0.015% of Fe2O3, and 0% of CaO. The inner layer satisfies the requirements: the inner layer comprises, by the weight percentage based on oxides in the inner layer, 58-62% of SiO2, 13-17.5% of Al2O3, 2.5-14.7% of Na2O, 3.8-16.1% of K2O, 4.5-7.1% of MgO, 0-0.9% of ZrO2, 0.005-0.015% of Fe2O3, and 0% of CaO. The base layer satisfies the requirements: the base layer comprises, by the weight percentage based on oxides in the base layer, 58-62% of SiO2, 13-17.5% of Al2O3, 12.5-14.7% of Na2O, 3.8-6.1% of K2O, 4.5-7.1% of MgO, 0-0.9% of ZrO2, 0.005-0.015% of Fe2O3, and 0% of CaO.

Description

technical field [0001] The invention relates to the field of glass plates, in particular to a chemically strengthened glass plate. Background technique [0002] At present, what is widely used in train window glass is physically strengthened glass made by physical strengthening. Physically strengthened glass is also called tempered glass. It heats the glass uniformly to the tempering temperature range above the Tg temperature, keeps it warm in this temperature range for a period of time, and then quenches it to form compressive stress on the glass surface and tensile stress inside, that is, Can produce strengthened glass. [0003] Chemically strengthened glass is currently widely used in electronic products due to its excellent properties. Chemical strengthening mainly adopts the method of ion exchange enhancement. Ion exchange enhancement is to place the glass in a high-temperature molten salt, and the ions on the glass surface and the ions in the molten salt are exchange...

AI Technical Summary

Problems solved by technology

[0005] In order to meet people's increasingly higher requirements for glass strengthening performance, the object of the present invention is to provide a high-alumina chemically strengthened glass suitable for train windows to replace the currently widely used physically strengthened soda-lime glass or other chemically strengthened glass, thereby Improving the impact resistance of existing train window glass

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