ELASTIC CONSTANTS OF Tm-DOPED GLASS BY BULK COMPRESSION MODEL

Abstract

Tm₂O₃-ZnO-B₂O₃-TeO₂ glass system was prepared by using melt quenching technique. The basic measurements of the glass that are density and molar volume were measured. Elastic properties of Tm-doped zinc borotellurite glass were investigated using bulk compression model. After considering all the factors that involve in this theoretical approach such as cross-link density, number of bond per unit volume and stretching force constant, all the elastic moduli can be calculated. This includes bulk, shear, Young Modulus and also Poisson’s ratio. Besides that, the atomic ring size also can be determined. Results indicated that the bulk modulus, Kbc decreased while the other elastic moduli increased with the increment of Tm^3+. The Poisson’s ratio is decreased as Tm³⁺ is added. Results show that the network structure of the glass samples become more compact and rigid as Tm³⁺ is added.