Development of nanosized lanthanum strontium aluminum manganite as electrodes for potentiometric oxygen sensor
Development of nanosized lanthanum strontium aluminum manganite as electrodes for potentiometric oxygen sensor
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DOI：
10.1016/j.snb.2014.07.027
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发表时间：
2014-11
影响因子：
8.4
通讯作者：
M. Mullen;J. Spirig;J. R. Hoy;J. Routbort;Dileep Singh;P. Dutta
中科院分区：
文献类型：
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作者：
M. Mullen;J. Spirig;J. R. Hoy;J. Routbort;Dileep Singh;P. Dutta
采用微波辅助柠檬酸法制备了La0.8Sr0.2Al0.9Mn0.1O3（LSAM）纳米晶，并用电镜和x射线衍射对其进行了表征。用阻抗谱法研究了LSAM的电学行为，得到了其传导活化能。采用等静压热压方法研究了LSAM烧结体与氧化钇稳定的四边形氧化锆多晶（YTZP）（一种广泛研究的氧离子导电电解质）的连接。用微探针拉曼光谱分析了连接区特征，并通过高温化学反应验证了LSAM和YTZP粉末在界面处形成的产物主要为锆酸锶。利用LSAM的电学特性，研制了以LSAM为电极，YTZP为电解质的高温氧传感器。
Nanocrystalline La0.8Sr0.2Al0.9Mn0.1O3(LSAM) was synthesized by a microwave-assisted citrate method, and characterized by electron microscopy and X-ray diffraction. Electrical behavior of LSAM was investigated by impedance spectroscopy and activation energy of conduction was obtained. Joining of sintered bodies of LSAM and yttria-stabilized tetragonal zirconia polycrystals (YTZP), an extensively studied oxygen ion conducting electrolyte, was examined by isostatic hot pressing methods. Characteristics of the joining region were evaluated with microprobe Raman spectroscopy, and products formed at the interface, primarily strontium zirconate, was confirmed by examination of high temperature chemical reaction between LSAM and YTZP powders. The electrical properties of the LSAM were exploited for development of a high temperature oxygen sensor in which LSAM functioned as the electrode and YTZP as electrolyte.