FEATURES OF CHANGE OF THERMOPHYSICAL PROPERTIES IN THE GLASS TRANSITION INTERVAL
An attempt was made to interpret the structural changes of glass in the temperature interval of glass transition based on the study of values of the coefficient of linear thermal expansion (CTEL) of Na2O-SiO2 and Na2O-CaO-SiO2 systems. In most cases, CTEL in this interval takes a leap of its value. However, for different glass compositions, the size of this leap is different, and in some cases it is not observed at all.