Some studies of the optical properties of tungsten-calcium-tellurite glasses

A range of tungsten tellurite glasses containing calcium was prepared and the densities, optical absorption edges and infrared optical absorption spectra were measured. The optical energy gap is of order 3 eV, somewhat lower than for many oxide-based glasses. It is established that the main absorption bands are related to the bonds in TeO₂ rather than the other components of the glasses.