Análise das propriedades óptica e estrutural das matrizes vítreas de telurito com diferentes modificadores

Abstract

In the present work, five glass compositions: 70 TeO2 + 18 ZnO + 12 X mol% with (X = Li2CO3, Na2CO3, K2CO3, PbO and Bi2O3), were prepared and investigated using the methods of density, molar volume, optical absorption UV-Vis and Raman spectroscopy. The properties of density, molar volume, molar refractivity, polarizability and metallization with different modifiers were discussed, as well as the effects of modifiers on optical energy gap (Eopt) and refractive index are presented and discussed. In the Raman analysis, the phonon energies of the samples were obtained, and it was also possible to observe the structural changes due to the presence of different modifiers, as well as the detection of functional groups such as trigonal TeO4 (tbp), trigonal TeO3 (tp) bipyramid. Te-OTe bonds and bridged oxygen (BO) and unbridged oxygen (NBO) bonds.