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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Complex impedance analysis of NaLaTiO4 electroceramics
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Complex impedance analysis of NaLaTiO4 electroceramics

机译：NaLaTiO4电陶瓷的复阻抗分析

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摘要

A layered perovskite type ceramic oxide, NaLaTiO4, has been prepared by a standard high temperature solid-state reaction route. Material formation has been confirmed by x-ray diffraction (XRD) studies. Complex impedance analysis on this system has been carried out, to investigate its electrical properties in details. The impedance analysis results have indicated the electrical conduction process to be governed by the contribution of both the grain (bulk) and grain boundaries above a temperature of 350 degrees C with typical negative temperature coefficient of resistance (NTCR) type behaviour like that of a semi-conductor. The d. c. conductivity of the material as evaluated from the impedance analysis has been observed to be of the order of similar to 10(-9) Scm(-1) at room temperature and similar to 10(-6) Scm(-1) at 500 degrees C. The conductivity variation shows a cross over from Mott-type hopping behaviour at lower temperatures to a thermally activated Arrhenius behaviour at higher temperatures.
机译：已经通过标准的高温固态反应路线制备了层状钙钛矿型陶瓷氧化物NaLaTiO 4。通过X射线衍射（XRD）研究已经确认了材料的形成。已经对该系统进行了复阻抗分析，以详细研究其电性能。阻抗分析结果表明，导电过程受温度高于350摄氏度时晶粒（大块）和晶界的贡献所控制，具有典型的负电阻温度系数（NTCR）型行为，类似于半导体。 -导体。 d。 C。根据阻抗分析评估，材料的电导率在室温下约为10（-9）Scm（-​​1），在500度下约为10（-6）Scm（-​​1） C.电导率变化显示出从较低温度下的Mott型跳变行为转变为较高温度下的热活化Arrhenius行为。

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