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

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

doi:https://doi.org/10.1007/s10853-012-7095-6

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

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

Department of Materials Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

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 language	American English
Pages (from-to)	3173-3176
Number of pages	4
Journal	Journal of Materials Science
Volume	48
Issue number	8
DOIs	https://doi.org/10.1007/s10853-012-7095-6
State	Published - 1 Apr 2013

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

https://doi.org/10.1007/s10853-012-7095-6

Cite this

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title = "Dissolution kinetics and solubility limit of CaF2 in molten KCl-NaCl salt",

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.",

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T1 - Dissolution kinetics and solubility limit of CaF2 in molten KCl-NaCl salt

AU - Salhov, Shai

AU - Aizenshtein, Michael

AU - Froumin, Natalie

AU - Barzilai, Shmuel

AU - Frage, Nahum

PY - 2013/4/1

Y1 - 2013/4/1

N2 - 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.

AB - 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.

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