Transport properties of sodium chloride polycrystals with liquid intergranular interlayers

Abstract

The diffusion permeability, electric conductivity, and filtration coefficient of water containing sodium chloride polycrystals have been measured. Based on the measurement results, the dynamic thickness of intergranular interlayers, which determines the transport properties of the material, has been calculated. For samples that are initially continuous, this value (120-130 nm) corresponds to the averaged capacity of the grain boundaries with respect to water independently determined by analytical methods. The dynamic thickness of the interlayers in pellets molded from a wetted NaCl powder under a high pressure is significantly smaller (about 20 nm).