ULTRASONIC STUDY OF TELLURITE GLASSES

Abstract

An ultrasonic study of the entire vitreous range of the semiconducting non-crystalline solid Te0z-V205 is presented and supported by a theoretical and experimental review on the

properties of vitreous oxides with the emphasis being placed on their elastic properties. The ultrasonic wave velocity , density, and hence elastic moduli are particularly important for characterising glasses as a function of composition. These parameters give some useful information about both the micro-structure and the dynamics of these glasses.

The investigated glass samples were prepared from Te02 and V205 oxides with concentration ranging from I 0 to. 50 mol % V205 . The prepared glass samples examined using x-ray diffraction and results showed that these glasses are amorphous i.e. non-crystalline.

The density of the studied binary Te02-V205 glasses decreased by increasing V205 content. This was attributed to the replacement of Te atom by V atom of less atomic mass and atomic volume.