Abstract
Glasses of the composition xPr6O11–(35−x) Ag2O–65B2O3 (x=0, 0.1–0.5mol%) have been prepared using the melt quenching method. The ac and dc conductivity and dielectric properties of glass have been measured over a wide range of frequencies and temperatures. Experimental results indicate that the ac conductivity and the dielectric constants depend on temperature, frequency and praseodymium content. The conductivity as a function of frequency exhibited two components: dc conductivity (σdc), and ac conductivity (σac). The activation energies are estimated and discussed. The impedance plot at each temperature appeared as a semicircle passes through the origin. In all the samples, only one semicircle has been observed over the entire range of temperature studied indicating only one type of conduction mechanism.
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