Publishing house Radiotekhnika

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Proton Conductivity and Dielectric Relaxation of Water in Nanoporous Alumina



Frequency dependence of the impedance of nanoporous Al2O3 with adsorbed water in the temperatures range near phase transition water – ice was investigated. Correlation between processes of proton transport and dielectric relaxation of water confined in oxide’s nanopores was established. Two processes of dielectric relaxation of water in Al2O3 nanopores were revealed. One of them is concerned with Maxwell-Wagner polarization, and the other one – with the “jumps” of protons between adjacent water molecules within the limits of one cluster. Distributions by time of high-frequency water relaxation were obtained in low-temperature, high-temperature phases and at temperature of phase transition in water confined in Al2O3 nanopores

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