• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Dielectric relaxation of the double perovskite oxide Ba2PrRuO6
【24h】

Dielectric relaxation of the double perovskite oxide Ba2PrRuO6

机译：双钙钛矿氧化物Ba2pruo6的介电弛豫

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Samples of Ba2PrRuO6 were prepared by the solid state reaction method and the structure was characterized by X-ray diffraction (XRD). Scanning electron microscopy (SEM) and dielectric measurements were performed in order to investigate the morphology and electric properties of the ceramics. X-ray diffraction data reveal that the Ba2PrRuO6 samples are of the cubic crystal structure with the space group Fm3m at room temperature. The dielectric properties were studied in the range of 20Hz to 1 MHz in the temperature range from 10 K to 300 K. Strong dispersion in frequency and a rapid increase in epsilon are observed when T > 150 K. The observed steps of the epsilon(T) curves are correlated with the peaks of the tan(T) curves, with the peak temperature shifting to higher values as the frequency increases. Impedance spectroscopy studies indicate the presence of grain and grain boundary relaxations in the sample at high temperatures, while at low temperatures only grain relaxation can be observed. Both grain and grain boundary relaxation times follow the Arrhenius law with activation energies of 0.16 eV and 0.17 eV, respectively.
机译：通过固态反应方法制备Ba2Pruo6的​​样品，并且该结构的特征在于X射线衍射（XRD）。进行扫描电子显微镜（SEM）和介电测量以研究陶瓷的形态和电性能。 X射线衍射数据揭示了Ba2Pruo6样品在室温下具有空间组Fm3m的立方晶体结构。在20Hz至1MHz的范围内研究介电性质在10K至300k的温度范围内。当T> 150 K时，观察到频率的强度和ε的快速增加。ε的观察到的ε（t ）曲线与TAN（T）曲线的峰相关，随着频率的增加，峰值温度转化为更高的值。阻抗光谱研究表明在高温下样品中存在晶粒和晶粒边界松弛，而在低温下只能观察到晶粒松弛。谷物和晶粒边界弛豫时间都遵循Arrhenius法律，分别为0.16eV和0.17eV的激活能量。

著录项

  • 来源
    《RSC Advances》 |2019年第22期|共6页
  • 作者

    Chen Jenq-Wei; Chiou Kuan Ru; Hsueh An-Chih; Chang Ching-Ray;

  • 作者单位

    Natl Taiwan Univ Dept Phys Taipei 106 Taiwan;

    Natl Taiwan Univ Dept Phys Taipei 106 Taiwan;

    Natl Taiwan Univ Dept Phys Taipei 106 Taiwan;

    Natl Taiwan Univ Dept Phys Taipei 106 Taiwan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号