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首页> 外文期刊>Physica, B. Condensed Matter >Oxygen-vacancy-related high-temperature dielectric relaxation and electrical conduction in 0.95K_(0.5)Na_(0.5)NbO _30.05BaZrO_3 ceramic
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Oxygen-vacancy-related high-temperature dielectric relaxation and electrical conduction in 0.95K_(0.5)Na_(0.5)NbO _30.05BaZrO_3 ceramic

机译：0.95K_（0.5）Na_（0.5）NbO _30.05BaZrO_3陶瓷中与氧空位有关的高温介电弛豫和导电

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摘要

The crystal structure and dielectric properties of 0.95K _(0.5)Na_(0.5)NbO_30.05BaZrO_3 (KNNBZ) ceramic have been investigated by X-ray diffraction and dielectric measurement. A rhombohedral distortion was caused and the dielectric permittivity near Curie temperature was significantly enhanced by introducing BZ into KNN. The dielectric and conductivity properties of the sample were studied by using AC impedance spectroscopy and universal dielectric relaxation law in detail. The typical high-temperature dielectric relaxation process was confirmed to be related to the oxygen vacancies inside the ceramic. The effect of lattice distortion on the activation energy for oxygen vacancy migration in KNNBZ was discussed by comparing with KNN and KNNBaTiO_3.
机译：通过X射线衍射和介电测量研究了0.95K _（0.5）Na_（0.5）NbO_30.05BaZrO_3（KNNBZ）陶瓷的晶体结构和介电性能。通过将BZ引入KNN，引起了菱面体形畸变，并且居里温度附近的介电常数大大提高。通过使用交流阻抗谱和通用介电弛豫定律详细研究了样品的介电和电导特性。确认典型的高温介电弛豫过程与陶瓷内部的氧空位有关。通过与KNN和KNNBaTiO_3的比较，讨论了晶格畸变对KNNBZ中氧空位迁移活化能的影响。

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