Relaxation currents in dielectric liquids

Measurements of charging, discharging and voltage-reversal currents were carried out in dielectric liquids of simple molecular structure (benzene and carbon tetrachloride) and complex molecular structure (two kinds of fluorocarbon liquids). The experiments were carried out under dynamic and steady-state conditions. The slope of the voltage-current characteristics was n>1 for results obtained under dynamic conditions and n<1 for steady-state conditions. For simple liquid hydrocarbons the slope of the voltage-current characteristics was n=1 for a current time less than 0.5 s after the liquid was in equilibrium conditions. From transient measurements, mobilities of charge carriers in the fluorocarbon liquids have been determined which are similar to those in liquid crystals. The activation energy for electric conduction of the fluorocarbon liquids has been calculated.<>