Fabrication of Nano-structured DyxCe1-xO2-x/2(x=0.15 and 0.2) Electrolytes Using Combined Process of Spark Plasma Sintering and Conventional Sintering

Abstract

Doped ceria (CeO2) compounds are fluorite-type oxides that show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, considerable interest has been shown in application of these materials for "low" (500deg-650degC) temperature operation of solid oxide fuel cells (SOFCs). To improve the conductivity in dysprosium (Dy) doped CeO2 , sinterability nanopowders were synthesized via carbonate coprecipitation method. The dense sintered bodies were fabricated using a combined method of spark plasma sintering (SPS) and conventional sintering (CS)