Electrical Properties of Nanocrystalline Ce0.8Sm0.2O2− and Ce1−xGdxO2− (0.1 ≦ x ≦ 0.3) Ceramics for IT-SOFC
Abstract:Ce0.8Sm0.2O2− and Ce1−xGdxO2− (0.1 ≦ x ≦ 0.3) nano-sized powders were successfully synthesized by the solution combustion synthesis process. The calcined nanopowders showed a ceria-based single phase with a cubic fluorite structure. In this study, we discussed the structural and electrical characteristics of the sintered Ce0.8Sm0.2O2− and Ce1−xGdxO2−. We obtained high-quality Ce0.8Sm0.2O2− and Ce1−xGdxO2− ceramics with a high density, ultra-fine grain size, and high electrical conductivity even at low sintering temperature using the nanosized powders. The electrical conductivities at 800 °C for the Ce0.8Sm0.2O2− sintered at 1400 °C and the Ce0.8Sm0.2O2− sintered at 1350 °C were 0.110 and 0.104 Scm−1, respectively.
Document Type: Research Article
Publication date: November 1, 2010
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