Siberian Federal University

Some ZBLAN glasses doped with NdF3 and the tellurium-containing glass 90TeO2–10PbO∙P2O5 were studied by physical chemical methods. The temperature dependence of luminescence intensity was obtained for the ZBLAN glasses. Light scattering of ZBLAN glasses and the tellurium-containing glass was studied. The luminescence maximum (1054 nm, Nd) and the scattered light maximum (1100 nm) were recorded in the temperature range 25–440°C for the ZBLAN glasses and 25–530°C for the tellurium-containing glass. The correlation was found between temperature changes in the optical characteristics and data of differential thermal analysis of the glasses. It was shown that in the optical temperature dependences there were observed changes in the area of glass transition temperature Tg, the onset of crystallization Tx and maximum crystallization Tc. It is possible to use the temperature dependences of optical curves as a control for heat treatment of vitreous samples at glass ceramics production