PROPERTIES AND STRUCTURE OF ZNO-PBO-B2O3 GLASSES

DC conductivity, density and infrared investigations have been carried out on ZnO-PbO-B2O3 glasses. The activation energy for conduction sho ws a maximum value at a specific ZnO concentration, depending on the g lass composition. Both the conductivity and the density increase with an increase in the oxygen to boron ratio in a common dependence regard less of glass composition. The molar volume decreases with increasing ZnO for all compositions. The results are discussed considering the du al role of ZnO and its effect on glass structure. It is concluded that these properties are controlled by the structure of the zinc lead ber ate network. The infrared spectra for all the glasses have the same fe atures indicating the presence of the same structural groupings.