Solid State Ionics, Vol.148, No.3-4, 557-565, 2002
Phase characterization and electrical conductivity of LaSr(GaMg)(1-x)MnxO3 system
LSGM (La0.9Sr0.1Ga0.8Mg0.8Mg0.2O3) and LSM (La0.9Sr0.1MnO3) are attractive electrolyte and electrode materials, respectively, for the solid oxide fuel cells (SOFCs). Since both materials are based on perovskite structure, the reaction between them is easily expected. In this study, various compositions of LaSr(GaMg)(1-x)MnxO3 or xLSM-(1-x)LSGM (x=0-1) system were prepared to identify the possible reaction products and to see their effects on the electrical conductivity. Powder compacts were prepared by using the solid-state reaction method and sintered at 1500 degreesC for 6 h. The phase, analyzed from X-ray diffraction (XRD) patterns, changed from the single-phase cubic (0 less than or equal to x less than or equal to 0.12) to the mixture of cubic and hexagonal phases (0.12