Journal article
Influence of pore former on porosity and mechanical properties of Ce0.9Gd0.1O1.95 electrolytes for flue gas purification
Department of Energy Conversion and Storage, Technical University of Denmark1
Mixed Conductors, Department of Energy Conversion and Storage, Technical University of Denmark2
Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark3
Fundamental Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark4
Friedrich-Alexander University Erlangen-Nürnberg5
Single layered porous Ce0.9Gd0.1O1.95 electrolytes were fabricated by tape casting using different types, shapes and sizes of pore formers and their respective strength and stiffness were compared. The sintered bodies were characterized by scanning electron microscopy, mercury porosimetry, impulse excitation technique (Young modulus) and flexural strength measurements, to investigate the role of the different pore formers on the properties of the compounds.
The compared techniques used to evaluate porosity give consistent results. The ratio between open and total porosities, evaluated from mercury porosimetry, varies depending on the used pore formers. The stiffness and strength of the compounds show an exponential dependency to the total porosity. By considering the open porosity instead (functional porosity), we observe that samples with platelets shaped pore formers have higher in-plane strength than spherical pore formers.
An optimum can be found in term of Weibull strength and strain of samples obtained with the various pore formers by considering the dependency on the functional open porosity instead of the total porosity. © 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Language: | English |
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Year: | 2016 |
Pages: | 4546-4555 |
ISSN: | 18733956 and 02728842 |
Types: | Journal article |
DOI: | 10.1016/j.ceramint.2015.11.147 |
ORCIDs: | Charlas, Benoit , Frandsen, Henrik Lund , Kammer Hansen, Kent and Kaiser, Andreas |
A. Pore former A. Tape casting C. Mechanical properties C. Strength D. CGO