Thermal, optical and Raman spectroscopy studies of lithium tellurite glasses containing molybdenum and tungsten ions

Abstract

Lithium tellurite glasses are fabricated and characterized by density, X-ray diffraction (XRD), thermal analysis, UV-Visible and Raman spectroscopy. Density of glasses decreases with incorporation of MoO3 in lithium tellurite glasses, whereas density increases with the addition of WO3, these changes in density are due to different molar mass of constituents. The introduction of MoO3 and WO3 in lithium tellurite glasses enhances the glass transition temperature and thermal stability. Raman studies revealed that the network structure of the glasses consists of TeO4 and TeO3/TeO3+1 units. The present glass system have potential application for development of laser materials, optical waveguides, and crystal-free optical fibres.Lithium tellurite glasses are fabricated and characterized by density, X-ray diffraction (XRD), thermal analysis, UV-Visible and Raman spectroscopy. Density of glasses decreases with incorporation of MoO3 in lithium tellurite glasses, whereas density increases with the addition of WO3, these changes in density are due to different molar mass of constituents. The introduction of MoO3 and WO3 in lithium tellurite glasses enhances the glass transition temperature and thermal stability. Raman studies revealed that the network structure of the glasses consists of TeO4 and TeO3/TeO3+1 units. The present glass system have potential application for development of laser materials, optical waveguides, and crystal-free optical fibres.