Chemical stability of doped BaCeO3-BaZrO3 solid solutions in different atmospheres
来源期刊：Journal of Rare Earths2008年第4期
论文作者：吕敬德 王岭 樊丽华 李跃华 戴磊 郭红霞
文章页码：505 - 510
摘 要：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 microstructure 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 rela- tively stable, while BaCe0.9Y0.1O3–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.
吕敬德，王岭，樊丽华，李跃华，戴磊，郭红霞
摘 要：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 microstructure 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 rela- tively stable, while BaCe0.9Y0.1O3–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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