Glass compositions with improved chemical and mechanical durability

摘要

The embodiments described herein relate to chemically and mechanically durable glass compositions and pharmaceutical packaging formed from the same. According to one embodiment, a glass for pharmaceutical packaging includes from about 70 mol. % to about 80 mol. % SiO2; from about 4 mol. % to about 8 mol. % alkaline earth oxide, the alkaline earth oxide comprising MgO and CaO; X mol. % Al2O3, wherein X is from about 4 to about 8; and Y mol. % alkali oxide comprising non-zero amounts of Na2O and K2O, wherein Y is about 9-15 mol. % and a ratio of Y:X is greater than 1.

主权项

1. A glass for pharmaceutical packaging having a glass composition comprising:
from about 70 mol. % to about 80 mol. % SiO2; from about 4 mol. % to about 8 mol. % alkaline earth oxide, the alkaline earth oxide comprising MgO and CaO; X mol. % Al2O3, wherein X is from 4 to about 8; and Y mol. % alkali oxide comprising non-zero amounts of Na2O and K2O, wherein a concentration of K2O is from 0.01 to less than 2, Y is about 9-15 mol. % and a ratio of Y:X is greater than 1.