Radiofrequency Conductivity and Its Relationship with Viscosity in Case of Polar Dielectrics

Abstract

The radiofrequency conductivity in case of nitrobenzene, normal propyl alcohol and acetone have been measured over a wide range of temperature for frequencies ranging from 400 kHz to 6 MHz. It has been found that the r.f. conductivity increases with the rise of temperature at first slowly and then rapidly. If the values of r.f. conductivity be plotted against the inverse of coefficient of viscosity of the liquid at different temperatures the relationship is linear with different intercepts and slopes for different frequencies. Assuming the presence of free ions which contributes to conduction current and the existence of usual displacement current, a mathematical expression has been deduced for the r.f. conductivity which can satisfactorily explain the observed experimental results. From the slope of the curves, the number of free ions per unit volume has also been calculated.