A. O. Khudorozhkova, M. V. Laptev, A. V. Isakov, A. A. Redkin, N. P. Kulik, Yu. P. Zaikov.
ABSTRACT
The surface tension of the KF-KCl-KI molten salt systems at a fixed KF/KCl ratio as a function of KI content was measured using the platinum cylinder pull-off method. The measurements were carried out in inert atmosphere using construction materials resistant to melts under investigation. The surface tension of the melts (66KF-34KCl) – KI (mol %) was measured with a molar ratio of KI to the sum of potassium chloride and potassium fluoride from 0 to 100% in the temperature range 863–1083 K. The addition of potassium iodide into the KF-KCl melt leads to decrease in the surface tension. The temperature dependences of surface tension of melts were described using linear functions. The increase in the KI concentration leads to decrease in the temperature coefficient of surface tension.
KEY WORDS:
molten salts, surface tension, potassium fluoride, potassium chloride, potassium iodide.
DOI: 10.31857/S0235010621050078