Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Powder Packing Behavior and Constrained Sintering in Powder Processing of Solid Oxide Fuel Cells (SOFCs)

  • Lee, Hae-Weon (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST)) ;
  • Ji, Ho-Il (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Jong-Ho (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST)) ;
  • Kim, Byung-Kook (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST)) ;
  • Yoon, Kyung Joong (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST)) ;
  • Son, Ji-Won (Center for Energy Materials Research, Korea Institute of Science and Technology (KIST))
  • Received : 2019.01.26
  • Accepted : 2019.02.20
  • Published : 2019.03.31
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Abstract

Widespread commercialization of solid oxide fuel cells (SOFCs) is expected to be realized in various application fields with the advent of cost-effective fabrication of cells and stacks in high volumes. Cost-reduction efforts have focused on production yield, power density, operation temperature, and continuous manufacturing. In this article, we examine several issues associated with processing for SOFCs from the standpoint of the bimodal packing model, considering the external constraints imposed by rigid substrates. Optimum compositions of composite cathode materials with high volume fractions of the second phase (particles dispersed in matrix) have been analyzed using the bimodal packing model. Constrained sintering of thin electrolyte layers is also discussed in terms of bimodal packing, with emphasis on the clustering of dispersed particles during anisotropic shrinkage. Finally, the structural transition of dispersed particle clusters during constrained sintering has been correlated with the structural stability of thin-film electrolyte layers deposited on porous solid substrates.

Keywords

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