Dissolution kinetics and solubility limit of CaF2 in molten KCl-NaCl salt

Shai Salhov, Michael Aizenshtein, Natalie Froumin, Shmuel Barzilai, Nahum Frage

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The interaction between NaCl-KCl salt of an equimolar composition and CaF2 was investigated in the 1023-1123 K temperature range. The solubility limit was determined as 2.1, 2.5, and 3.4 mol.% for 1023, 1073, and 1123 K, respectively. The linear dependence of the specific weight loss with time and the activation energy of the dissolution (124.6 ± 8.7 kJ/mol) indicate that CaF2 dissociation of the ions is the limiting stage of the process. Thermodynamic properties (partial enthalpy and entropy) of CaF 2 in a dilute ternary -NaCl-KCl-CaF2 liquid solution were estimated using the values of the solubility limit and by applying a regular solution approach.

Original languageEnglish
Pages (from-to)3173-3176
Number of pages4
JournalJournal of Materials Science
Volume48
Issue number8
DOIs
StatePublished - 1 Apr 2013

ASJC Scopus subject areas

  • Materials Science (all)
  • Mechanics of Materials
  • Mechanical Engineering

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