Synthesis Characterization and Sintering of Cobalt-Doped Lanthanum Chromite Powders for Use in SOFCs

Abstract:

Doped lanthanum chromite is a promising as interconnect material because of its good conductivity at high temperatures and its stability in oxidizing and reducing atmospheres. Perovskite oxide powders of Co-doped lanthanum chromite were synthesized by dispersing precursor metal salt solutions in a polymer matrix followed by a thermal treatment. XRD patterns showed that a highly crystalline cobalt-doped lanthanum chromite was obtained. Fine perovskite powder with a surface area of 6.15 m2 g-1 calcined at 700oC for 1 h, were obtained. After the sample sintered at 1450oC for 3h, the powder reached high densities exceeding 97% of the theoretical density. The proposed here has proved to be a very promising technique for the synthesis of lanthanum chromite powders.

• Periodical: Materials Science Forum (Volumes 660-661)
• Pages: 971-976
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.660-661.971
• Online since: October 2010
• Authors: Chieko Yamagata, Sonia Regina Homem de Mello-Castanho
• Keywords: Ceramic Powders Synthesis, Interconnect, Lanthanum Chromite, Solid Oxide Fuel Cell (SOFC)

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