CORRELATION OF ELASTIC, ACOUSTIC AND THERMODYNAMIC PROPERTIES IN B2O3GLASSES

Vitreous B2O2 is a model glass whose physical properties may depend on thermal history and hydroxyl ion, OH-, concentration. A set of differ ent B2O3 glasses has been prepared and their elastic, acoustic and the rmodynamic properties were investigated around the glass-transition te mperature T-g by differential scanning calorimetry and Brillouin-scatt ering. A noticeable variation of the 'fictive' temperature T-f, sound velocity and elastic constants was found from glass to glass. Mass den sity rho is a simple and useful parameter to characterize the glassy s tate of a given B2O3 sample. Correlations among these physical propert ies of B2O3 glasses are presented and discussed. (C) 1997 Elsevier Sci ence B.V.