Abstract
Binary oxide glass system of the composition (100 - x)B2O3 center dot xPbSO(4) [0 <= x <= 40] is prepared by the press-quenching technique. The X-ray measurement confirmed the complete amorphous nature of the studied glasses. The values of the bulk density and oxygen ion density shows a continuous increase with increasing of the mol % PbSO4, while molar volume values showed some variations as the mol % PbSO4 increased in the glasses. The electrical conductivities sigma(dc) and sigma(ac) are tested between 303 and 673 kelvin. The dc conductivity, sigma(dc), is found to follow the Arrhenius equation, with values between 10(-12) and 10(-7) S cm(-1) in the whole temperature range. The activation energies are found between 0.44 and 0.76 eV. The ac conductivity, sigma(ac), is determined at four frequencies 120, 10(3), 10(4) and 10(5) Hz. sigma(ac) for the studied glasses are fitted using the percolation path approximation mechanism (PPT) in addition to the correlated barrier hopping (CBH) mechanism. Some important parameters are obtained as a result of the fitting to the experimental data by both the PPT and the CBH models. Finally, the dielectric constant epsilon' and dielectric loss epsilon'' are studied as a function of temperature.