Influence of ZnO additive on the properties of Y-doped BaSnO3 proton conductor

The effects of ZnO additive on the phase formation, microstructure and electrical conduction of Y-doped BaSnO3 have been investigated. The single-phase and dense BaSn0.75Y0.25O3- delta compound with 4mol% ZnO additive was successfully prepared after sintering at 1300 degree C, which significantly re...

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Published inMaterials science & engineering. B, Solid-state materials for advanced technology Vol. 176; no. 15; pp. 1178 - 1183
Main Authors Wang, Yanzhong, Chesnaud, Anthony, Bevillon, Emile, Yang, Jinlong, Dezanneau, Guilhem
Format Journal Article
LanguageEnglish
Published Elsevier 15.09.2011
Subjects
Additives
Barium stannate
Conductivity
Drying
Electrolytes
Engineering Sciences
Materials
Resistivity
Sintering
Zinc oxide
BaSnO3
Grain boundaries
Electrical conductivity
Sintering
Fuel cells
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Summary:The effects of ZnO additive on the phase formation, microstructure and electrical conduction of Y-doped BaSnO3 have been investigated. The single-phase and dense BaSn0.75Y0.25O3- delta compound with 4mol% ZnO additive was successfully prepared after sintering at 1300 degree C, which significantly reduces the sintering temperature. The conductivities measured under dry and wet air atmospheres reveal that the bulk conductivity of BaSn0.71Y0.25Zn0.04O3- delta is much lower than that of BaSn0.75Y0.25O3- delta . However, ZnO as a sintering aid does not affect the bulk conductivity. The total conductivity of BaSn0.75Y0.25O3- delta with ZnO as the sintering aid is slightly higher than that of unmodified BaSn0.75Y0.25O3- delta , and reaches 2.410-3Scm-1 at 621 degree C. Therefore, this material can be used as a proton-conducting electrolyte for intermediate temperature solid oxide fuel cells.
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ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2011.06.009