High anionic conductivity of solids with different structure

摘要

Impedance spectroscopy data for a several materials with high ionic conductivity at the intermediate temperature range (296-473 K) were obtained and analyzed. Investigated systems including pure CsSb_2F_7, KSb_2F, related solid solutions Cs_((1-x))K_xSb_2F_7 (0.1 ≤ x ≤ 0.65) and some ionic materials with fluorite structure PbF_2-BiF_3-K[Na]F were studied. The values of the dc conductivity and activation energies are estimated from the analysis of the conductivity spectra. The role of cation substitution influencing on conductivity values, phase transitions and activation energies in the given systems have been discussed.