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首页> 外文期刊>Physica, B. Condensed Matter >Oxygen-defects-related dielectric response in CaCu3Ti4O12 ceramics
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Oxygen-defects-related dielectric response in CaCu3Ti4O12 ceramics

机译：CaCu3Ti4O12陶瓷中与氧缺陷相关的介电响应

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摘要

A 10 mm thickness columned CaCu3Ti4O12 ceramic was fabricated by the conventional solid-state reaction method and the dielectric properties of different parts in ceramic had been investigated. For the sample close to the surface, only one Debye-type relaxation around 10(7) Hz was observed at room temperature. However, for the sample close to the core, another relaxation peak was observed at about 10(4) Hz. The results were explained in terms of the equivalent circuit model by showing in the impedance spectroscopy. Moreover, it was introduced that the low-frequency dielectric relaxation is associated with the electrode-sample contact effect based on varying sample thickness and an annealing treatment in the nitrogen atmospheres.
机译：采用常规的固态反应方法制备了厚度为10 mm的圆柱状CaCu3Ti4O12陶瓷，并研究了陶瓷中不同部位的介电性能。对于靠近表面的样品，在室温下仅观察到10（7）Hz附近的一种德拜型弛豫。但是，对于靠近核心的样品，在约10（4）Hz处观察到另一个弛豫峰。通过等效电路模型通过阻抗谱显示来解释结果。此外，介绍了低频介电弛豫与基于变化的样品厚度和在氮气氛中的退火处理的电极-样品接触效应有关。

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