Phase Equilibria, Volume Properties, Surface Tension, and Viscosity of the (FLiNaK)eut + K2NbF7 Melts

• Published in: Journal of chemical and engineering data Vol. 54; no. 7; pp. 2081 - 2084
• Main Authors: Kubíková, B, Kucharík, M, Vasiljev, R, Boča, M
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 09.07.2009
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Phase equilibria; Viscosity; Phase diagram; Molar volume; Surface properties; Sodium Fluorides; Surface tension; Potassium Fluorides; Thermodynamic properties; Phase equilibrium; Lithium Fluorides; Rheological properties; Molten salt
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je800979q

Physicochemical properties of the system (FLiNaK)eut (1) + K2NbF7 (2) were investigated. Phase equilibria were studied by a thermal analysis method. Density of the investigated system was measured by the Archimedean method. On the basis of these data, molar volumes were calculated for selected temperatures, and the partial molar volume of K2NbF7 in (FLiNaK)eut was evaluated adopting the value V̅ 2/cm3·mol−1 = (121.1 ± 0.4)  at 1073 K, indicating volume contraction. Surface tension was measured by the maximal bubble pressure method, and viscosity was measured using the computerized torsion pendulum method.