Corning Incorporated
SCRATCH RESISTANT GLASS AND METHOD OF MAKING

Abstract:

Glass-based articles comprise stress profiles providing improved scratch resistance. The glass-based articles comprise: a thickness t; a lithium aluminosilicate composition; and a molar ratio of sodium oxide (Na.sub.2O) to lithium oxide (Li.sub.2O) that is less than or equal to 0.63 at the center of the glass-based article. The articles have a molar ratio of sodium dioxide (Na.sub.2O) to lithium dioxide (Li.sub.2O) in a post-spike near region that is greater than or equal to 0.9 and/or less than 1.5.