Abstract
Ion mobility and transport properties of the fluorite-type K0.41Ba0.09Bi0.5F2.09, K0.41Cd0.09Bi0.5F2.09, K0.45Ba0.05Bi0.5F2.05, and K0.45Cd0.05Bi0.5F2.05 solid solutions were studied by the 19F NMR spectroscopy and conductivity measurements. Analysis of 19F NMR spectra made it possible to assess the temperature effect on the nature of ion motions in the fluoride sublattice, identify types of ion mobility, and determine the respective temperature ranges (150–470K). The results showed that the dominant type of ion motion is diffusion of fluoride ions in these solid solutions at temperatures above 350K. The samples have the ionic conductivity above 10−2S/cm at 463K.
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