Thermodynamic characterization of acid cryolite systems

IF 0.9 Q4 CHEMISTRY, MULTIDISCIPLINARY Acta Chimica Slovaca Pub Date : 2022-01-01 DOI:10.2478/acs-2022-0011
Michaela Benköová, E. Mališová, J. Híveš
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Abstract

Abstract Measuring of the electromotive force in molten system is used to characterize thermodynamic properties of the system at equilibrium. Values of the electromotive force are very important for the determination of activity and standard electrode potential. Investigation of the electromotive force of Al + TiB2 and Al-Al cell was the main aim of this work leading to the characterization of acid cryolite systems. The measurements were realized using a molten aluminum electrode and the electromotive force of an electrochemical cell was investigated in electrolytes at various molar ratios (NaF/AlF3) at equilibrium. Thermodynamic properties were measured in acid cryolite melts at three different temperatures: 800 °C, 900 °C, and 1000 °C, for all experiments.
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酸性冰晶石体系的热力学表征
摘要通过测量熔融体系中的电动势来表征系统在平衡状态下的热力学性质。电动势的值对于活性和标准电极电势的测定非常重要。本工作的主要目的是研究Al+TiB2和Al-Al电池的电动势,从而对酸性冰晶石系统进行表征。使用熔融铝电极实现测量,并在平衡时在不同摩尔比(NaF/AlF3)的电解质中研究电化学电池的电动势。在酸性冰晶石熔体中,在800°C、900°C和1000°C三种不同温度下测量了所有实验的热力学性质。
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来源期刊
Acta Chimica Slovaca
Acta Chimica Slovaca CHEMISTRY, MULTIDISCIPLINARY-
自引率
12.50%
发文量
11
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