Preparation and Characterization of Sm_(1-x)Sr_xCoO_3 Ceramics by the Gelcasting Process

摘要

Perovskite Sm_(1-x)Sr_xCoO_3 ceramics have been successfully prepared by geicasting 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 Sm_(1-x)Sr_xCoO_3 ceramics were also investigated. It has been shown that single Sm_(1-x)Sr_xCoO_3 perovskite phase forms at a relatively low calcination temperature of 1000℃. Especially, porous Sm_(1-x)Sr_xCoO_3 ceramics with homogeneous microstructure can be obtained by controlling sintering process of the gelcasts. In addition, the Sm_(1-x)Sr_xCoO_3 ceramics show good electrical conductivity, which can meet the demand for solid oxide fuel cell cathode application.