The goal of this work was to investigate the influence of ZnO on physico-chemical properties of tellurite glasses of the
TeO2-ZnO-PbO-La2O3 system, including those doped with Yb3+. The effect of glass crystallization on the thermal
stability and crystallizing phases formed upon the heat treatment were investigated by DTA/DSC/, XRD and
microscopic methods. The spectral dependence of ellipsometric angles of the tellurite glass samples, have been studied.
The influence of ZnO and Yb3+ ion, onto changes of refractive index of tellurite glass (without RE admixture) were
examined. The optical measurements were conducted on Woollam M2000 spectroscopic ellipsometer, in spectral range
of 190-1700 nm. Based on obtained results it can be concluded, that admixtures of ZnO have the most considerable
influence on thermal stability tellurite glasses raise.
|