Ceria‐doped scandia‐stabilized zirconia (10Sc2O3·1CeO2·89ZrO2) as electrolyte for SOFCs: Sintering and ionic conductivity of thin, flat sheets

In this study, thin, flat sheets, about 90 μm thick, were prepared from ceria‐doped scandia‐stabilized zirconia with molecular formula 10Sc2O3·1CeO2·89 ZrO2 (10Sc1CeSZ) by tape casting and subsequent sintering at different thermal cycles. A sintering thermal cycle was selected that yielded defect‐fr...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2017-07, Vol.14 (4), p.532-542
Main Authors: Escardino, Agustín, Belda, Adriana, Orts, Maria‐Jose, Gozalbo, Ana
Format: Article
Language:English
Subjects:
Cerium oxides
Conductivity
grain size
Ion currents
Porosity
Sheets
Sintering
Tape casting
zirconia
Zirconium dioxide
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Summary:In this study, thin, flat sheets, about 90 μm thick, were prepared from ceria‐doped scandia‐stabilized zirconia with molecular formula 10Sc2O3·1CeO2·89 ZrO2 (10Sc1CeSZ) by tape casting and subsequent sintering at different thermal cycles. A sintering thermal cycle was selected that yielded defect‐free flat sheets, with practically negligible porosity (between 0.35% and 0.10%) and average grain diameters ranging from 1.32 to 6.30 μm. Ionic conductivity at 600°C was as high as 21 mS/cm. Ionic conductivity increased with average grain diameters up to 2.7 μm. At higher average grain diameters, conductivity remained practically constant.
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.12675