LONGITUDINAL ELASTIC-CONSTANTS OF TELLURITE GLASSES

The aim of the present work is to attempt to make a number of differen t glasses, based on tellurite as the principal former, which contain s ubstantial quantities of zinc oxide up to 40 mol % ZnO. To study the l ongitudinal elastic properties, measurements have been made of the vel ocity of the longitudinal ultrasonic waves propagated through the prep ared glasses. The results indicate that the longitudinal elastic const ants depend strongly upon the composition of the prepared glasses. A d etailed qualitative interpretation of the increase in the modulus is m ade. Information about the structure of the glass can be deduced after calculating the number of network bonds per unit volume and the cross link density. The role of the halogen inside the glass network is disc ussed.