摘要
用固相反应法合成了立方相陶瓷样品La2-xSrxMo2O9-α(x=0.05,0.10,0.15)。采用交流阻抗谱、气体浓差电池和氧泵(氧的电化学透过)等多种电化学方法研究了样品在550～1000℃下氧离子的导电性质。结果表明:La2-xSrxMo2O9-α陶瓷在氧化性气氛中几乎是纯的氧离子导体;在还原性气氛中为氧离子和电子的混合导体;掺杂量x对样品的电导率有着明显影响,其中x=0.10的样品La1.9Sr0.1Mo2O9具有最高的氧离子电导率,1000℃时的氧离子电导率约为0.17S.cm-1。
La2-xSrxMo2O9-α（x=0.05,0.10,0.15） ceramic samples with cubic phase structure were prepared by a solid-state reaction method. The oxygen ionic conducting properties of the samples were investigated via AC impedance spectra, oxygen concentration cell and oxygen pump （electrochemical oxygen permeation） methods at 550 - 1000℃ Under oxidizing atmospheres, all of the ceramic samples were almost pure oxide ion conductors, whereas under reducing atmosphere, the ceramic samples were mixed conductors of oxide-ion and electron. The conductivities were obviously affected by the doping content x. Among the samples, La1.9Sr0.1Mo2O9 had the highest oxide ion conductivity, and the oxide ion conductivity was about 0.17 S·cm^-1 at 1000℃
出处
《中国稀土学报》
CAS
CSCD
北大核心
2009年第3期362-368,共7页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金资助项目(20771079)
