ACOUSTOELECTRIC METHOD FOR DETERMINING THE DIELECTRIC CHARACTERISTICS OF A FLUID IN THE BOUNDARY LAYER

Using surface acoustic waves to determine the dielectric characteristics of a liquid in the boundary layer is demonstrated. An acoustoelectric method for determining the dielectric constant of a liquid in the boundary layer is proposed. The dielectric characteristics of adsorbed water in the frequency range from 40 to 400 MHz are investigated. It is shown that the dependence of the dielectric permittivity of adsorbed water on vapor pressure at a fixed frequency of the surface wave is of a relaxation character. The developed acoustoelectric method allows one to study the electrophysical properties of nanoscale coatings and films. This method can successfully complement existing methods for studying the dielectric characteristics of boundary layers of liquids and relaxation processes in them.

Authors: Simakov I. G., Gulgenov Ch. Zh., Bazarova S. В.

Direction: Physics

Keywords: Acoustoelectric method, boundary layer of a liquid, dielectric characteristics, surface acoustic waves, velocity dispersion of surface acoustic waves, adsorption, adsorbed water, dielectric relaxation

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