Abstract

For a dielectric medium with a locally conductivity used as some simulation of a concentration polarization phase, a complex capacitance is formulated to represent the dielectric relaxation behavior. The frequency dependence of capacitance and conductance was calculated numerically for a combined system of the concentration polarization phase and an aqueous phase with homogeneous concentration. Marked dielectric relaxations were found only in systems where the decrease in concentration is formed inside the concentration polarization phase. The theoritical formulas of dielectric relaxation derived are of great help in finding a significant clue to the estimation of the thickness of the polarization layer and the concentration gradient in a system where concentration polarization occurs alongside a membrane which is subjected to bias voltage.

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