Synthesis, phase diagram, and conductivity study in a La0.5+x+yLi0.5-3xTi1-3yMn3yO3 system

摘要

The stoichiometry, polymorphysm, and electrical behaviour of solid solutions of La0.5+y+xLi0.5-3xTi1-3yMn3yO3 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, beta, 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 decreases when the amount of lithium diminishes and electronic conductivity increases with manganese content. (C) 1998 Academic Press. [References: 15]