DIELECTRIC-PROPERTIES AND POLARIZABILITY OF MOLYBDENUM TELLURITE GLASSES

The dielectric behaviour of the [TeO2](1-x)[MoO3](x), x = 0.2, 0.3 and 0.45 mol%, glassy system is reported for the temperature range 300-57 3 K and the frequency range of 0.1-10 kHz. Both the static and high fr equency dielectric constants for these binary tellurite glasses decrea se with increasing MoO3 content. The temperature dependence of the die lectric constants of these glasses are positive. The frequency depende nce of the dielectric constant identifies a frequency dependence which does not show a flattening at low frequency. The room temperature sta tic dielectric polarizability is discussed in terms of the MoO3 concen tration. The temperature dependence of the dielectric constant has bee n analysed in terms of the temperature changes of both volume and pola rizability and also a volume change of the polarizability.