Preparation and Characterization of Sm1-xSrxCoO3 Ceramics by the Gelcasting Process
Perovskite Sm1-xSrxCoO3 ceramics have been successfully prepared by gelcasting from oxides and carbonate powders, which were characterized by sintering the gels cast from a suspension of low-solubility metallic oxide precursors and organic monomers. The porosity, pore size, microstructure and electrical conductivity of the obtained Sm1-xSrxCoO3 ceramics were also investigated. It has been shown that single Sm1-xSrxCoO3 perovskite phase forms at a relatively low calcination temperature of 1000°C. Especially, porous Sm1-xSrxCoO3 ceramics with homogeneous microstructure can be obtained by controlling sintering process of the gelcasts. In addition, the Sm1-xSrxCoO3 ceramics show good electrical conductivity, which can meet the demand for solid oxide fuel cell cathode application.
Wei Pan and Jianghong Gong
J. G. Cheng et al., "Preparation and Characterization of Sm1-xSrxCoO3 Ceramics by the Gelcasting Process", Key Engineering Materials, Vols. 336-338, pp. 444-447, 2007