Camber Evolution and Stress Development of Porous Ceramic Bilayers During Co-Firing

De Wei Ni, Vincenzo Esposito, Cristine Grings Schmidt, Tesfaye Tadesse Molla, Kjeld Bøhm Andersen, Andreas Kaiser, Severine Ramousse, Nini Pryds

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Camber evolution and stress development during co-firing of asymmetric bilayer laminates, consisting of porous Ce0.9Gd0.1O1.95 gadolinium-doped cerium oxide (CGO) and La0.85Sr0.15MnO3
lanthanum strontium manganate (LSM)-CGO were investigated. Individual layer shrinkage was measured by optical dilatometer, and the uniaxial viscosities were determined as a function of layer density using a vertical sintering approach. The camber evolution in the bilayer laminates was recorded in situ during co-firing and it was found to correspond well with the one predicted by the theoretical model. The estimated sintering mismatch stress in co-fired CGO-LSM/CGO bilayer laminates was significantly lower than general sintering stresses expected for free sintering conditions. As a result, no co-firing defects were observed in the bilayer laminates, illustrating an acceptable sintering compatibility of the ceramic layers.
Original languageEnglish
JournalJournal of the American Ceramic Society
Issue number3
Pages (from-to)972-978
Publication statusPublished - 2013


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