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

被引：0

作者：

Salhov, Shai ^{[1
]}

Aizenshtein, Michael ^{[1
]}

Froumin, Natalie ^{[2
]}

Barzilai, Shmuel ^{[1
]}

Frage, Nahum ^{[2
]}

机构：

[1] Nucl Res Ctr Negev, IL-84190 Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

来源：

JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 08期

关键词：

THERMAL-ENERGY STORAGE; PHASE-CHANGE; ALUMINUM; TEMPERATURE; ENTHALPIES; MAGNESIUM; MIXTURES; SYSTEMS; SCRAP;

D O I：

10.1007/s10853-012-7095-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 +/- A 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 CaF2 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.

引用

页码：3173 / 3176

页数：4

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