Elastic moduli of ternary tellurite glasses at room temperature

Longitudinal and shear ultrasonic velocities in the ternary tellurite glass es have been measured at room temperature with different percentages of the third component. The ternary tellurite glasses have the form (composition in mol%): 70 TeO2 - (30-x) V2O5 - xA(n)O(m), where A(n)O(m) is CeO2 or ZnO, and x = 3, 5, 7, 10 mol%. The elastic properties, longitudinal, shear, bul k and Young's modulus, have been calculated together with Poisson's ratio a nd Debye temperature. A qualitative analysis has been carried out after cal culating the ring diameter of the glass network. Quantitatively, the estimated bulk modulus and Poisson's ratio of the terna ry TeO2-V2O5-CeO2 system have been calculated, using the bond compression m odel and according to the cation-anion bond of each oxide present in the gl ass, in order to analyze the room-temperature elastic moduli data. Information about the structure of the glass can be deduced after calculati ng the number of network bonds per unit volume, the average stretching forc e constant, the average ring size and the mean cross link density.