Sintering process optimization for multi-layer CGO membranes by in situ techniques

Andreas Kaiser; A.S. Prasad; Søren Preben Vagn Foghmoes; Severine Ramousse; Nikolaos Bonanos; Vincenzo Esposito

doi:10.1016/j.jeurceramsoc.2012.09.021

Sintering process optimization for multi-layer CGO membranes by in situ techniques

Authors:

Kaiser, Andreas ;
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0000-0001-9873-3015
Department of Energy Conversion and Storage, Technical University of Denmark
Prasad, A.S. ;
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Banaras Hindu University
Foghmoes, Søren Preben Vagn ;
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0000-0002-9166-2039
Department of Energy Conversion and Storage, Technical University of Denmark
Ramousse, Severine ;
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0000-0003-0780-1858
Department of Energy Conversion and Storage, Technical University of Denmark
Bonanos, Nikolaos ;
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0000-0002-6252-4681
Department of Energy Conversion and Storage, Technical University of Denmark
Esposito, Vincenzo
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0000-0002-9817-7810
Department of Energy Conversion and Storage, Technical University of Denmark

DOI:

10.1016/j.jeurceramsoc.2012.09.021

Abstract:

The sintering of asymmetric CGO bi-layers (thin dense membrane on a porous support; Ce0.9Gd0.1O1.95-delta = CGO) with Co3O4 as sintering additive has been optimized by combination of two in situ techniques. Optical dilatometry revealed that bi-layer shape and microstructure are dramatically changing in a narrow temperature range of less than 100 degrees C. Below 1030 degrees C, a higher densification rate in the dense membrane layer than in the porous support leads to concave shape, whereas the densification rate of the support is dominant above 1030 degrees C, leading to convex shape. A fiat bi-layer could be prepared at 1030 degrees C, when shrinkage rates were similar. In situ van der Pauw measurements on tape cast layers during sintering allowed following the conductivity during sintering. A strong increase in conductivity and in activation energy E-a for conduction was observed between 900 and 1030 degrees C indicating an activation of the reactive sintering process and phase transformation of cobalt oxide. (C) 2012 Elsevier Ltd. All rights reserved.

Type:

Journal article

Language:

English

Published in:

Journal of the European Ceramic Society, 2013, Vol 33, Issue 3, p. 549-556

Keywords:

Doped ceria; Multi-layer sintering; Sintering aid; Optical dilatometry; van der Pauw

Main Research Area:

Science/technology

Publication Status:

Published

Review type:

Peer Review

Submission year:

2013

Scientific Level:

Scientific

ID:

233103095

Sintering process optimization for multi-layer CGO membranes by in situ techniques

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