Electron microscopy studies of Y-, Sc- and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ ceramics for oxygen separation membranes
Electron microscopy studies of Y-, Sc- and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ ceramics for oxygen separation membranes
复制标题
用于氧膜分离的 Y、Sc 和 Zr 掺杂 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 陶瓷的电子显微镜研究
DOI：
10.5445/ir/1000071933
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
M. Meffert
中科院分区：
文献类型：
--
作者：
M. Meffert
在中温（700 - 800 °C）范围内，二次相的形成是氧传导钙钛矿Ba0.5Sr0.5Co0.8Fe0.2O3-δ（BSCF）应用的主要障碍。研究了用合适的过渡金属如Sc、Zr和Y掺杂以稳定立方BSCF相。通过扫描和透射电子显微镜对材料进行了研究。这包括化学成分（EDXS）、掺杂剂晶格位置（ALCHEMI）和Co价态变化（EELS）的测定。发现Y掺杂强烈减少BSCF中的第二相形成。
Secondary phase formation poses a major obstacle in the application of the oxygen-conducting perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) in the intermediate temperature range (700 – 800 °C). Doping with suitable transition metals like Sc, Zr, and Y was investigated to stabilize the cubic BSCF phase. The material was studied by scanning and transmission electron microscopy. This includes the determination of the chemical composition (EDXS), dopant lattice sites (ALCHEMI) and changes of the Co-valence state (EELS). Y-doping was found to strongly reduce secondary phase formation in BSCF.