Glasses having low softening temperatures and high toughness

摘要

Glasses having a low softening point and high toughness. The glasses are alkali aluminoborosilicate glasses having softening points of less than 900° C. and, in some embodiments, in a range from about 650° C. up to about 825° C., and an indenter damage threshold of at least 300 g for glasses that are not chemically strengthened. The glasses are free of alkaline earth metals, lead, arsenic, antimony, and, in some embodiments, lithium.

主权项

1. An alkali aluminoborosilicate glass, the glass having a softening point in a range from 650° C. up to 725° C. and an indenter damage threshold of at least 300 g, and wherein the glass has a B2O3/Al2O3 molar ratio of greater than 1.2 and is free of alkaline earth metals, lead, arsenic, and antimony.