Electrical Conductivity Measurements of Binary Solutions of Molten Alkaline-Earth Fluorides

Kwang Bum Kim, Donald R. Sadoway

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The electrical conductivities of binary solutions of molten MgF2-CaF2, MgF2-SrF2, MgF2-BaF2, CaF2-SrF2, CaF2-BaF2, and SrF2-BaF2 were measured by electrochemical impedance spectroscopy in a conductance cell comprising twin capillaries of pyrolytic boron nitride, movable tungsten electrodes, and a molybdenum crucible. In three of the systems, MgF2-CaF2, CaF2-SrF2, and SrF2-BaF2, the specific electrical conductivity was found to vary linearly with composition at constant temperature, while in the other three systems, MgF2-SrF2, MgF2-BaF2, and CaF2-BaF2, there were pronounced negative deviations from additivity. In a given binary system, the relative excess specific conductivity was found to vary parabolically with composition at constant temperature. In a homologous sequence the parabolic constant was proportional to the relative polarizability of the cations comprising the binary system.

Original languageEnglish
Pages (from-to)2128-2133
Number of pages6
JournalJournal of the Electrochemical Society
Volume139
Issue number8
DOIs
Publication statusPublished - 1992 Aug

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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