Behavior of BaCe0.9−xZrxY0.1O3−δ in water and ethanol suspensions
Behavior of BaCe0.9−xZrxY0.1O3−δ in water and ethanol suspensions
复制标题
BaCe0.9−xZrxY0.1O3−δ 在水和乙醇悬浮液中的行为
DOI：
10.1007/s10853-013-7955-8
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发表时间：
2014
影响因子：
4.5
通讯作者：
S. Ricote
中科院分区：
文献类型：
--
作者：
M. Della Negra;Wei Zhang;N. Bonanos;S. Ricote
钙钛矿质子导体BaCe 0.2Zr 0.7Y 0.1O 2.95和BaCe 0.5Zr 0.4Y 0.1O 2.95（称为BCZY）的稳定性已经通过在室温下将粉末暴露于水和乙醇中来测试。液相作为时间的函数与电感耦合等离子体发射光谱进行监测。用水，钡的浸出持续了200多天，即试验的持续时间。有没有系统的差异，在与自然pH值的溶液或碱化与NH 4 OH的浸出。采用X射线衍射（XRD）和透射电子显微镜（TEM）对处理前后的粉体进行了表征。TEM证实了钙钛矿相的降解，并揭示了来自破碎的钙钛矿的团聚的碳酸钡纳米支和纳米颗粒。乙醇的影响要轻得多;浸泡后的元素浸出可忽略不计长达17天，处理前后的XRD图谱没有显示出任何结构退化。得出的结论是，乙醇是流延BCZY粉末的合适选择。
The stability of perovskite proton conductors BaCe0.2Zr0.7Y0.1O2.95 and BaCe0.5Zr0.4Y0.1O2.95 (referred to as BCZY) has been tested by exposure of powders to water and ethanol at room temperature. The liquid phase was monitored as a function of time with inductively coupled plasma-optical emission spectrometry. With water, leaching of barium continued for over 200 days, the duration of the test. There was no systematic difference in leaching with solutions of native pH or alkalified with NH4OH. The powders, before and after treatment, were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). TEM confirmed the degradation of the perovskite phase and revealed barium carbonate nanobranches and nanoparticles from the agglomeration of the fragmented perovskite. The effect of ethanol was much less severe; leaching of elements after immersion was negligible for up to 17 days, and XRD patterns before and after treatment did not show any structural degradation. It is concluded that ethanol is an appropriate choice as a processing solvent for tapecasting BCZY powders.