Current State of Research on the Viscosity of Molten Fluorides
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
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Current State of Research on the Viscosity of Molten Fluorides
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| Автор |
Tkacheva, O. Yu.
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| Тематика |
MOLTEN FLUORIDES
DYNAMIC VISCOSITY FLUIDITY ELECTRICAL CONDUCTIVITY MOLAR VOLUME ENERGY ACTIVATION |
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| Описание |
Received: 16 February 2024. Accepted: 18 March 2024. Published online: 22 March 2024.
The development of new high-precision equipment for the experimental study of the physical-chemical properties of molten salts has led to the emergence of new data. This review examines recent experimental results on the viscosity of molten salt mixtures based on alkali fluorides, which are currently used in modern technologies for the production of metals and alloys and are also promising media for application in molten salt nuclear reactors. Various approaches to the analysis of experimental data are discussed. A different mechanism of viscous flow in the series LiF – NaF – KF and KF – RbF – CsF is well explained from the position of the theory of the autocomplex structure of molten salts. An anomalous decrease in the viscosity of fluorides from lithium to cesium, in comparison with other alkali metal halides, the viscosity of which increases with increasing the cation radius, is confirmed by calculations of the formation energy of the autocomplex and the binding energy between the complex-forming ion and the free ion of the second coordination sphere. To study the mechanism of liquid flow, the temperature dependence of dynamic viscosity is analyzed using the fluidity parameter. Additional information regarding the mechanism of viscous flow can be obtained from the relationship between the viscosity and electrical conductivity of melts. It was assumed that the most promising approach to studying the kinematic properties and the structure of molten salts is the use of both high-precision experiment and mathematical modeling based on first principles. This work was supported by the Ministry of Science and Higher Education of the RF under the program of scientific research "Fundamental studies of thermodynamics and kinetics of processes in molten salts", registration number: 122020100205-5. The author expresses deep gratitude to Alexey Rudenko and Alexander Kataev for providing unpublished experimental data on the viscosity of KCl. |
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| Дата |
2024-04-08T12:40:28Z
2024-04-08T12:40:28Z 2024 |
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| Тип |
Article
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| Идентификатор |
Tkacheva O. Current State of Research on the Viscosity of Molten Fluorides / O. Tkacheva // Electrochemical Materials and Technologies. — 2024. — Vol. 3. № 1. — № 20243029.
2949-0561 http://elar.urfu.ru/handle/10995/131612 https://www.elibrary.ru/item.asp?id=65429135 10.15826/elmattech.2024.3.029 |
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| Язык |
en
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| Связанные ресурсы |
Electrochemical Materials and Technologies. 2024. Vol. 3. № 1
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| Издатель |
Уральский федеральный университет
Ural Federal University |
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