Search

Abstract: La1− x Sr x CoO3 (0≤ x ≤1) ceramics have been prepared by a solid-state reaction method. Crystal structure has been checked by X-ray diffraction and the results indicate that the rhombohedral phase of La1− x Sr x CoO3 turns into cubic phase in the range of Sr content x =0.3–0.4, and the lattice parameter continually increases with increasing Sr content. La1− x Sr x CoO3 (x ≥0.8) ceramics with cubic phases have been synthesized in air. Microstructure analysis shows that both the grain size and the pore size enlarge, the grains are more well-bonded and the quantity of grain boundaries becomes small with increasing Sr content. The change of porous microstructure with different Sr content has been discussed preliminarily. [Copyright &y& Elsevier]