Analysis of the Ionic Conduction Behavior in Some Room Temperature Molten Fluorides

Abstract

The self-diffusion coefficients of cations and anions increased with increasing the HF-concentration and temperature in (CH3)3N·mHF and (CH3)4NF·mHF melts. Behavior of the self-diffusion coefficients of cation and anion in every melt is good agreement with an increase in ionic conductivity and a decrease in viscosity (1). The transference number of (FH)nF- anions estimated from the values of self-diffusion coefficients for each ion in every melt was almost constant and their values were around 0.6 and 0.7 in the (CH3)3N·mHF and the (CH3)4NF·mHF melts, respectively. Therefore, it is concluded that the diffusion of (FH)nF- anions is faster than that of each cation in these melts.