Camber Evolution and Stress Development of Porous Ceramic Bilayers During Co‐Firing. Issue 3 (6th December 2012)

• Record Type: Journal Article
• Authors: Ni, De‐Wei; Esposito, Vincenzo; Schmidt, Cristine Grings; Molla, Tesfaye Tadesse; Andersen, Kjeld Bøhm; Kaiser, Andreas; Ramousse, Severine; Pryds, Nini; Hsueh, C.‐H.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 3(2013)
• Page Start: 972
• Page End: 978
• Publication Date: 2012-12-06
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12113
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12113-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Camber evolution and stress development during co‐firing of asymmetric bilayer laminates, consisting of porous Ce_0.9Gd_0.1O_1.95 gadolinium‐doped cerium oxide (CGO) and La_0.85Sr_0.15MnO₃ 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.</p> </abstract>