A sintering kinetics model for ceramic dual-phase composite

Yanxiang Zhang, Meng Ni, Changrong Xia, Fanglin Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

An analytical model is developed for the sintering kinetics of ceramic dual-phase composites of the cathodes in solid oxide fuel cells (SOCFs). The model simulates the isothermal and pressureless sintering processes and formulates volumetric three-phase boundary (TPB) length and porosity as a function of sintering time, surface/interface energies, grain-boundary diffusivities, particle sizes, and dual-phase composition. Lanthanum strontium manganite (LSM)-yttria-stabilized zirconia (YSZ) composite is used as an example to develop and validate the model. LSM-YSZ composites are sintered at 1100°C for various sintering time, and the TPB length and porosity are estimated from SEM images by using stereological analysis to validate the model. Parametric studies are performed at various conditions, illustrating novel insights into the sintering kinetics. This analytical model is generic and applicable to the sintering kinetics of ceramic dual-phase composites for use in solid-state electrochemical devices, such as SOCFs, electrolyzers, and gas separation membranes. This analytical model can also be easily extended to the sintering processes of other ceramic dual-phase and triple-phase composites.
Original languageEnglish
Pages (from-to)2580-2589
Number of pages10
JournalJournal of the American Ceramic Society
Volume97
Issue number8
DOIs
Publication statusPublished - 1 Jan 2014

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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