Abstract
The electrical conductivity of (LiCl-KCl)eut.–CsCl molten mixtures has been measured over a concentration range of 0–100 mol % CsCl and in a wide temperature span (624–1180 K). The measurements were carried out in quartz cells of the capillary type with platinum electrodes using the AC-bridge method. The molar volume of these mixtures was estimated using similar literature data. The maximum deviations of the molar volume from the additive values are ∼2%. Molar conductivity and its activation energy were calculated using the derived molar volume data. It was found that the electrical conductivity of all melts increases with increasing temperature and decreases with increasing CsCl concentration. In the molten (LiCl-KCl)eut.–CsCl mixtures, the significant negative deviations of the specific and molar electrical conductivities from additive values are observed over the whole concentration range, which indicates that the replacement of one alkaline cation by those, significantly different in size, is accompanied by a noticeable rearrangement of interparticle bonds. Therefore, the complexation in the system becomes different. According to the obtained data on electrical conductivity, the liquidus line of this system was built.
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