Processing, dielectric and impedance spectroscopy of lead free BaTiO3-BiFeO3-CaSnO3
Processing, dielectric and impedance spectroscopy of lead free BaTiO3-BiFeO3-CaSnO3
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DOI：
10.1016/j.jallcom.2018.06.284
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发表时间：
2018-10
影响因子：
6.2
通讯作者：
S. Sahoo;S. Hajra;Manojit De;K. Mohanta;R. Choudhary
中科院分区：
文献类型：
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作者：
S. Sahoo;S. Hajra;Manojit De;K. Mohanta;R. Choudhary
本文介绍了使用标准实验技术，以 80/13/07 的固定比例（即 0.80(BaTiO3)-0.13(BiFeO3)-0.07(CaSnO3)（简称 BTO-BFO-CSO-7））三种钙钛矿电子复合材料的结构和电性能的制造和表征。室温 X 射线衍射光谱分析有助于确定样品的晶体系统和晶胞尺寸（晶格参数）。使用介电和阻抗谱研究所制备的电子材料在不同频率（102–106Hz）和温度（20–450°C）下的电阻（阻抗、复数电模量和电传输特性）和绝缘（介电）特性。奈奎斯特图的研究证实了 BTO-BFO-CSO-7 复合材料中仅存在与温度相关的体积（颗粒）效应和负温度系数电阻。电导率谱分析表明，通过跳跃进行的电荷转移有助于电传输过程。使用复模量谱研究样品的介电弛豫。这项研究还有助于理解电传输过程的机制，该过程描述了非德拜类型的电导率弛豫。磁滞回线 (MH) 显示剩余磁化强度为 0.031 emu/g。
The paper presents the fabrication and characterization of structural and electrical properties of an electronic composite of three perovskites: BaTiO3,BiFeO3and CaSnO3in a fixed ratio of 80/13/07 (i.e., 0.80(BaTiO3)-0.13(BiFeO3)-0.07(CaSnO3) (referred as BTO-BFO-CSO-7)) using standard experimental techniques. Analysis of room temperature X-ray diffraction spectra helps to determine the crystal system and unit cell dimensions (lattice parameters) of the sample. The dielectric and impedance spectroscopy was used to study the resistive (impedance, complex electrical modulus and electrical transport properties) and insulating (dielectric) characteristics of the prepared electronic material at various frequencies (102–106Hz) and temperatures (20–450 °C). Study of the Nyquist plot confirms the presence of temperature dependent bulk (grain) effect only and negative temperature coefficient resistance in the BTO-BFO-CSO-7 composite. Analysis of conductivity spectra reveals that the charge transfer by hopping contributes to the electrical transport process. The dielectric relaxation of the sample is studied using complex modulus spectra. This study also helps to understand the mechanism of the electrical transport process, which depicts a non-Debye type of conductivity relaxation. The magnetic hysteresis loop (M − H) shows a remanent magnetization of 0.031 emu/g.