Powder Packing Behavior and Constrained Sintering in Powder Processing of Solid Oxide Fuel Cells (SOFCs)

Title
Powder Packing Behavior and Constrained Sintering in Powder Processing of Solid Oxide Fuel Cells (SOFCs)
Authors
이해원김병국이종호손지원지호일윤경중
Keywords
SOFC; Bimodal packing model; Constrained sintering; Anisotropic shrinkage; Structural stability
Issue Date
2019-02
Publisher
Journal of the Korean Ceramic Society; 한국세라믹학회지
Citation
VOL 56, NO 2-145
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.
URI
http://pubs.kist.re.kr/handle/201004/72052
ISSN
1229-7801
Appears in Collections:
KIST Publication > Article
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