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Electrical properties, conduction mechanism and modulus of diphosphate compounds

机译:二磷酸二磷酸化合物的电性能,导通机制和模量

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摘要

Rubidium aluminium diphosphate was synthesized by a conventional solid-state technique and its conduction properties determined by impedance spectroscopy. X-ray diffraction analysis indicated the formation of a single-phase monoclinic structure (space group P2(1)/c). The AC conductivity was determined using impedance spectroscopy over the frequency and temperature ranges of 40 Hz to 7 MHz and 400-700 K, respectively. The real and imaginary parts of the complex impedance were well-fitted to the equivalent circuit model and the frequency dependence of the AC conductivity followed Jonscher's law. The close values of the activation energies obtained from the relaxation time and the grain conductivity (sigma(g)) indicated that transport could be modelled by a hopping mechanism, probably dominated by the movement of Rb+ cations. The correlated barrier hopping model was used to describe the dominant conduction mechanism. A single relaxation peak was observed in the imaginary part of the modulus suggesting the grain response of the system.
机译:通过常规固态技术合成铷二磷酸二磷酸,其通过阻抗光谱法测定的传导性能。 X射线衍射分析表明形成单相单斜斜肌结构(空间组P2(1)/ c)。在40Hz至7MHz和400-700k的频率和温度范围内使用阻抗光谱法测定交流电导率。复杂阻抗的真实和虚部均适合于等效电路模型,交流电导率的频率依赖性遵循Jonscher的定律。从弛豫时间和晶传导率(西格马(克))得到的活化能的接近的值指出,传输可以通过跳频机制来建模,可能是由R​​B +阳离子的运动支配。相关屏障跳跃模型用于描述主要的传导机制。在模量的假想部分中观察到单个弛豫峰,表明系统的晶粒响应。

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  • 来源
    《RSC Advances》 |2016年第46期|共8页
  • 作者单位

    Univ Sfax Fac Sci Condensed Matter Lab BP 1171 Sfax 3000 Tunisia;

    Fac Sci Gabes Lab Phys Mat &

    Nanomat Appl Environm Tunis Tunisia;

    Univ Sfax Fac Sci Condensed Matter Lab BP 1171 Sfax 3000 Tunisia;

    Univ Sfax Fac Sci Condensed Matter Lab BP 1171 Sfax 3000 Tunisia;

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

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