High-strength alkali-aluminosilicate glass

Abstract

The invention provides high-strength alkali-aluminosilicate glass. The alkali-aluminosilicate glass is characterized by excellent meltability, fineability and processibility. The alkali-aluminosilicate glass is showed in the following formula: 60.5 to 69.0 weight percent of SiO2; 7.0 to 11.8 weight percent of Al2O3; 0 to 4.0 weight percent of B2O3; 2.0 to 8.5 weight percent of MgO; 0 to 4.0 weight percent of CaO; 0 to 5.0 weight percent of ZnO; 0 to 3.0 weight percent of ZrO2; 15.0 to 17.5 weight percent of Na2O; 0 to 2.7 weight percent of K2O; 0 to 2.0 weight percent of Li2O; and 0 to 1.5 weight percent of a fining agent such as As2O3, Sb2O3 CeO2, SnO2, Cl-, F-, (SO4) 2- and combinations thereof. The glass allows for adequate conditions for an alkali ion exchange treatment in a short time period (4 to 8 hours) and can also be produced according to the established, continuous, vertically downward directed drawing process such as the overflow down-draw method or the fusion method, the die slot or the slot down-draw method, or combinations thereof. The viscosity-temperature profile of the glass allows the use of the conventional fining agents in combination at the lowest amounts possible and additionally allows the production of the glass that are free of or contain only small amounts of either or both of antimony oxide and arsenic oxide.

Description

technical field

[0001] The present invention relates to high-strength alkali-aluminosilicate glass, a method for producing the high-strength alkali-aluminosilicate glass and applications and uses of the high-strength alkali-aluminosilicate glass. Background technique

[0002] The recent increase in popularity and use of mobile computing and communication devices has created a need for cover glass (cover glass) for touch panels, for protecting displays, and for improving the appearance of such devices. Due to the need for such devices to be small and lightweight, the cover glass used in such devices must be as thin and lightweight as possible. Therefore, a need arises to manufacture a cover glass that meets these requirements but at the same time maintains sufficient durability not to crack or break when the device is dropped by a user and is extremely scratch resistant. Such conflicting requirements make it highly desirable to increase the strength of such cover glasses. ...

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