Optical and Physical Properties of PbO-Modified TeO2-ZnO-Bi2O3 Glasses

A series of quaternary tellurite glasses of the form of 55TeO(2)-2Bi(2)O(3)[43-x]ZnO-xPbO (TZBP) were prepared by conventional melt quenching method. The amorphous nature of the glasses has been confirmed using XRD, and their tendency against crystallization has been concluded using DSC. Optical properties of the glasses aimed to gain information on the glasses refractive index, range of transparence, and theoretical minimum loss wewe obtained from measurement using Brewster angle measurement, UV-VIS-NIR spectrophotometer and FTIR. It is shown that the index of refraction increases with increasing PbO content. The IR-edge tends to be red -shifted. No clear tendency of UV-edge was observed. The combined results show that the width of the transparency increase slightly with the increase of Pb2+ content in TZBN glasses.