Densification and grain growth during sintering of porous Ce0.9Gd0.1O1.95tape cast layers: A comprehensive study on heuristic methods

De Wei Ni, Cristine Grings Schmidt, Francesca Teocoli, Andreas Kaiser, Kjeld Bøhm Andersen, Severine Ramousse, Vincenzo Esposito

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The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.

Original languageEnglish
JournalJournal of the European Ceramic Society
Issue number13-14
Pages (from-to)2529-2537
Publication statusPublished - 2013


  • Sintering
  • Grain growth
  • CeO2
  • Porosity
  • Grain boundary

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