Abstract
Crushing a glass causes the structural change nearby the fractured surface, but its detail has not been clearified yet. In this study, crush-induced increase in internal energy and its thermal relaxation were examined by measuring the heat of solution to HF(aq). The crush-induced increase of internal energy of lead silicate glass was much smaller than that of silica glass. This should be due to the fact that the small free volume in lead silicate glass reduces the ability of structural change caused by mechanical stress. The behavior of the soda-lime glass was intermediate of above-mentioned two glasses.
