Glass Science and Technology

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Elastic moduli of ternary tellurite glasses at room temperature
(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2000) El-Mallawany, Raouf; Sidkey, Mostafa; Afifi, Hisham
Longitudinal and shear ultrasonic velocities in the ternary tellurite glasses 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 - xAnOm, where ΑnΟm is CeO2 or ZnO, and x = 3, 5, 7, 10 mol%. The elastic properties, longitudinal, shear, bulk and Young's modulus, have been calculated together with Poisson's ratio and Debye temperature. A qualitative analysis has been carried out after calculating the ring diameter of the glass network, Quantitatively, the estimated bulk modulus and Poisson's ratio of the ternary TeO2-V2O5-CeO2 system have been calculated, using the bond compression model and according to the cation-anion bond of each oxide present in the glass, in order to analyze the room-temperature elastic moduli data. Information about the structure of the glass can be deduced after calculating the number of network bonds per unit volume, the average stretching force constant, the average ring size and the mean cross link density.