| 摘要 |
Disclosed are glass compositions comprising from 67 mol.% to about 75 mol.% SiO2; from about 6 mol.% to about 10 mol.% A120 3; from about 5 mol.% to about 12 mol.% alkali oxide, 5 wherein the alkali oxide comprises Na20 and K20 and the K20 is present in an amount less than or equal to 0.5 mol.%; and from about 9 mol.% to about 15 mol.% of alkaline earth oxide, the alkaline earth oxide comprising greater than 0 mol. % and less than or equal to 3.5 mol. % MgO and from about 2 mol. % to about 5 mol% CaO, wherein a ratio of a concentration of MgO to the sum of the concentration of divalent cations (MgO:RO) is less than 0.3 and the 10 glass composition is susceptible to strengthening by ion-exchange. <filename> |
