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Thermal conductivity of molten alkali halides and their mixtures

✍ Scribed by M.V. Smirnov; V.A. Khokhlov; E.S. Filatov

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
539 KB
Volume
32
Category
Article
ISSN
0013-4686

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✦ Synopsis

Thermal conductivity of molten alkali halides and their mixtures with common anions is measured as a function of temperature. Use is made of the most reliable method of coaxial cylinders made of platinum, with radiation heat transfer being taken into account. It is found to vary directly with temperature. Expressions for its temperature dependence are derived from the experimental observations. Linear relations of the thermal conductivity to the molar volume are established for molten alkali fluorides, chlorides, bromides, iodides and their mixtures with common anions. Deviations from the additive quantities towards smaller values are observed in the case of the mixtures. They are in a good accordance with inverse deviations of their adiabatic compressibility. The heat conduction of ionic melts is semiquantitatively examined. Elementary quantities of heat transferred from cations to anions and vice versa are estimated. collisions of uncharged hard spheric particles according to Osida[lO].

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