PHYSICAL PROPERTIES OF BOROTELLURITE GLASS DOPED WITH MANGANESE

Abstract

Systematic series of borotellurite glasses doped with manganese (100-x) [(B₂O₃)₃₀(TeO₂)₇₀] - xMnO with x = 0.1, 0.2, 0.3 and 0.4 were successfully synthesized by using the melt quenching technique. In this study, the remelting effect of the glass samples on their microstructure were investigated through the density measurement and FT-IR spectra, as well as being evaluated with the XRD techniques. Initial experimental results from XRD measurement show that there were two separate phases probably due to the existing of peak before the sample was remelted. The different physical behaviors of the studied glasses were closely related with the concentration of manganese in each phase. The transition temperatures of these types of glasses were found to decrease with addition of the manganese content and most probably due to the increasing of non bridging oxygen (NBO) in the borotellurite network.