Adhesion in two-phase melts of alkali metal halogenides

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Abstract

Adhesive interaction of phases in two-phase LiF+KBr, LiF+CsCl, LiF+RbBr, LiF+KI, LiF+CsBr, LiF+RbI, and LiF+CsI melts is analyzed. The adhesion of phases is found to grow as the temperature increases as a result of the superposition of thermal motion of ions and changes in the compositions of coexisting phases. The adhesion of phases is shown to be the less the wider the concentration interval of immiscibility of components. At the same temperature, the adhesion of the phases increases with the decreasing difference in the size of the mixed ions.

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About the authors

V. P. Stepanov

Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences

Author for correspondence.
Email: v.stepanov@ihte.ru
Russian Federation, Ekaterinburg

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Supplementary files

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2. Fig. 1. Temperature dependences of the work of adhesion in two-phase molten salts.

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3. Fig. 2. Dependence of the adhesion work (1150 K) on the width of the immiscibility dome at the crystallization temperature.

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4. Fig. 3. Dependences of the effective thickness of the interphase layer for stratifying mixtures of alkali metal halides on temperature [24].

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5. Fig. 4. Dependence of the adhesion work at 1150 K on the ratio of the sizes of the mixed ions for two-phase mixtures of alkali metal halides.

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6. Fig. 5. Temperature dependences of interfacial tension in logarithmic coordinates.

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