ABSTRACT BaZrO2.9 compound was prepared by the sol–gel process. Electrical and dielectric characterizations of the materials were performed using complex impedance spectroscopy technique over a frequency range of 100 Hz to 1 MHz and in a temperature range from 305 K to 370 K. ac conductivity and dielectric properties have been studied in order to explore the relaxation mechanisms in this compound. It can be seen from the experimental data that the ac conductivity is proportional to ωn (n < 1) and the value of n is temperature-dependent and has a tendency to increase with temperature. The overlapping-short-polaron tunneling (NSPT) model can explain the temperature dependence of the frequency exponent. Finally, the relaxation properties of the investigated compound are presented in the electric modulus formalism; the equivalent circuit and modulus spectrum indicate the non-Debye type of frequency dispersion in this material.

中文翻译：

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溶胶-凝胶 BaZrO2.9 化合物的介电、交流电导率和模量研究

摘要 BaZrO2.9 化合物是通过溶胶-凝胶法制备的。在 100 Hz 至 1 MHz 的频率范围内和 305 K 至 370 K 的温度范围内，使用复阻抗谱技术对材料进行了电学和介电表征。为了探索弛豫，研究了交流电导率和介电特性该化合物的机制。从实验数据可以看出，交流电导率与ωn(n < 1)成正比，n的值与温度有关，并有随温度升高的趋势。重叠短极化子隧穿 (NSPT) 模型可以解释频率指数的温度依赖性。最后，所研究化合物的弛豫特性以电模量形式表示；