Raman spectra and conductivity of PbO–PbCl2–CsCl melts

I. D. Zakiryanova, P. A. Arhipov

ABSTRACT:

Information regarding the structure and conductivity of homogeneous CsCl–PbCl2–PbO melts with different composition is obtained. The Raman spectra (RS) of the chloride and oxide-chloride melts containing lead oxide were registered. It was found that the Pb3O2Cl+ oxide-chloride groups are present in the systems CsCl (71.3 mol %)–PbCl2 (28.7 mol %) with addition of 12 mol % PbO and CsCl (18.3 mol %)–PbCl2 (81.7 mol %)with addition of 18 mol % PbO. The temperature dependence of the electrical conductivity of the PbCl2–CsCl chloride melts containing 28.7 and 81.7 mol % of lead chloride and the homogeneous molten CsCl mixtures (71.3 mol %)–PbCl2 (28.7 mol%) with addition of 12 mol % of PbO and CsCl (18.3 mol %)–PbCl2 (81.7 mol %) with addition of 18 mol %PbO was revealed. A significant deterioration of the ion conductive properties of the PbO–PbCl2–CsCl oxide-chloride melts in comparison to the PbCl2–CsCl chloride electrolytes was found. It was shown that a decrease in the electrical conductivity of the PbCl2–CsCl oxide-chloride melts by adding the lead oxide is due to the presence of the Pb3O2Cl+ oxide-chloride groups.

KEYWORDS:

Raman spectra, electrical conductivity, lead oxide, melts