Synthesis and electrical properties of the Pr0.5+x+yLi0.5–3xTi1–3yCr3yO3system

Abstract

The stoichiometry, polymorphism and electrical behaviour of solid solutions Pr_0.5+y+xLi_0.5–3xTi_1–3yCr_3yO₃ with perovskite-type structure have been studied. Data are given in the form of a solid solution triangle, phase diagrams, XRD patterns for the three polymorphs, A, β, and C, composition dependence of their lattice parameters and ionic and electronic conductivity plots. Microstructure and composition were studied by SEM/EDS and electron probe microanalysis. These compounds are mixed conductors. Ionic conductivity decreased when the amount of lithium diminished and electronic conductivity increased with chromium content.