Chemical stability of doped BaCeO3-BaZrO3 solid solutions in different atmospheres
BaCe0.45Zr0.45M0.1O3-δ （M=Y, In） and BaCe0.9Y0.1O3-δ were prepared through the conventional solid state reaction route. The chemical stability was investigated in hydrogen, carbon dioxide, and boiling water. Crystalline phase and microsa-ucture of the proton conductor before and after stability test...
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| Published in: | Journal of rare earths Vol. 26; no. 4; pp. 505 - 510 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
College of Chemical Engineering and Biotechnology, Hebei Polytechnic University, Tangshan 063009, China
01-08-2008
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | BaCe0.45Zr0.45M0.1O3-δ （M=Y, In） and BaCe0.9Y0.1O3-δ were prepared through the conventional solid state reaction route. The chemical stability was investigated in hydrogen, carbon dioxide, and boiling water. Crystalline phase and microsa-ucture of the proton conductor before and after stability test were measured with X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The results showed that all materials were quite stable in H2 atmosphere. In CO2 atmosphere, BaCe0.45Zr0.45M0.1O3-δ（M=Y, In） were relatively stable, while Bafe0.9Y0.1O3-δ decomposed. In boiling water, BaCe0.9Y0.1O3-δ was quickly decomposed into Ba（OH）2 and corresponding oxide. BaCe0.45Zr0.45M0.1O3-δ slightly reacted with boiling water and some amorphous phases were formed. However, BaCe0.45Zr0.45In0.1O3-δ was observed to exhibit better stability than BaCe0.45Zr0.45Y0.1O3-δ in water. The experimental results were interpreted in terms of thermodynamic data and tolerance factor. |
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| Bibliography: | 11-2788/TF chemical stability BaCeO3 BaCeO3; BaZrO3; proton conductor; chemical stability; different atmospheres; rare earths proton conductor BaZrO3 O61 different atmospheres rare earths ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 1002-0721 2509-4963 |
| DOI: | 10.1016/s1002-0721(08)60127-1 |