The Thermal Endurance of Glass

JSGT_1936_V20_T524_T529

The effect of composition on the thermal endurance of mixed alkali–boric oxide–silica glasses is investigated. The testing procedure is described, using annealed rods 5 mm diameter and 30 mm long, having fire polished ends. The relation between thermal endurance and chemical composition is of approximately parabolic form, and is illustrated by a solid model.

K. Tabata & T. Moriya