Thermal Conductivity of Cesium Bismuthides in the Liquid State

The thermal conductivity of liquid alloys of the cesium–bismuth system with 20–66 at % Bi in the temperature range from the liquidus line to 1173 K has been studied experimentally with an error of 4–6%. It was found that the thermal conductivity of liquid cesium bismuthides for the indicated composi...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2023-11, Vol.97 (11), p.2345-2349
Main Authors: Agazhanov, A. Sh, Abdullaev, R. N., Khairulin, A. R., Stankus, S. V.
Format: Article
Language:English
Subjects:
Bismuth
Cesium
Cesium base alloys
Chemical Thermodynamics and Thermochemistry
Chemistry
Chemistry and Materials Science
Error analysis
Heat transfer
High temperature
Liquid alloys
Liquidus
Lorenz number
Melts
Physical Chemistry
Thermal conductivity
Thermal diffusivity
Thermophysical properties
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Summary:The thermal conductivity of liquid alloys of the cesium–bismuth system with 20–66 at % Bi in the temperature range from the liquidus line to 1173 K has been studied experimentally with an error of 4–6%. It was found that the thermal conductivity of liquid cesium bismuthides for the indicated compositions and temperatures takes low values from 0.7 to 4.5 W/(m K) typical for liquid salts. The thermal diffusivity and Lorenz number were calculated from the results of thermal conductivity measurements. An analysis of the temperature and concentration dependences of the studied properties indirectly confirms current views on the presence of ordered structures called ionic complexes in alkali metal bismuthide melts, which significantly affect the thermophysical properties of melts and are destroyed at elevated temperatures.
ISSN:0036-0244
1531-863X
DOI:10.1134/S003602442311002X