Cite this article as:

Garkushin I. K., Lavrenteva O. V., Nikitina A. S., Andreeva Y. A. Density Calculation for Mixture Melts of LiF + NaF. Izvestiya of Saratov University. Chemistry. Biology. Ecology, 2020, vol. 20, iss. 3, pp. 290-299. DOI: https://doi.org/10.18500/1816-9775-2020-20-3-290-299

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Heading: 
Chemistry
UDC: 
541.1+544.012+544.013
Language: 
Russian

Density Calculation for Mixture Melts of LiF + NaF

Authors: 
Garkushin Ivan K., Samara State Technical University. Chemical and technological faculty. Department of General and Inorganic Chemistry, 443100, Samara, Molodogvardeyskaya str., 244, the main building, baschem@samgtu.ru
Lavrenteva Olga V., Samara State Technical University, 443100, Samara Molodogvardeyskaya street, building №244, olavolga1965@gmail.com
Nikitina Alina S., Samara State Technical University, 443100, Samara Molodogvardeyskaya street, building №244, nikitina.ke@yandex.ru
Andreeva Yana A., Samara State Technical University, 443100, Samara Molodogvardeyskaya street, building №244, andreevayaa2505@gmail.com
Тип статьи для РИНЦ: 
RAR научная статья
Abstract

Salt mixtures are used as molten electrolytes of chemical current sources, solvent melts of inorganic substances, heat storing compositions, fluxes for welding and soldering. Modern coolants include alkali metals and their halogenides. Lithium-containing thermofors have a special place. Density is one of the important properties of the melts used. The paper presents the analytical description of the density for the mixture melts of LiF + NaF of various compositions in the temperature range of 1130 ... 1320° K. As a result, an analytical equation was obtained, which made it possible to calculate the melt density of the eutectic mixture above liquidus by 5, 10, 50, 75, 100, 150, 200 and up to 1130° K. Similar data for eutectic compositions in the reference literature are not available. The isothermic and isoconcentration methods, the Karapetyans’s comparative method were used for description.

Key words: 
T-x-diagram, liquidus, lithium fluoride, sodium fluoride, melts, melting temperature, eutectic, density, calculation, graphical dependence, predicting
DOI: 
https://doi.org/10.18500/1816-9775-2020-20-3-290-299
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