Crack and scratch resistant glass and enclosures made therefrom

摘要

A glass and an enclosure, including windows, cover plates, and substrates for mobile electronic devices comprising the glass. The glass has a crack initiation threshold that is sufficient to withstand direct impact, has a retained strength following abrasion that is greater than soda lime and alkali aluminosilicate glasses, and is resistant to damage when scratched. The enclosure includes cover plates, windows, screens, and casings for mobile electronic devices and information terminal devices.

主权项

1. A glass comprising:
at least 58 mol % SiO2; at least 8 mol % Na2O; 5.5-12 mol % B2O3; and Al2O3; wherein a ratioAl2⁢O3⁡(mol⁢⁢%)+B2⁢O3⁡(mol⁢⁢%)∑modifiers⁢⁢(mol⁢⁢%)>1,the modifiers are one or more alkali metal oxide (R2O) and one or more alkaline earth oxide (RO);
wherein Al2O3 (mol %)>B2O3 (mol %) and 0.9