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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Studies on morphological and electrical properties of Al incorporated combusted iron oxide
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Studies on morphological and electrical properties of Al incorporated combusted iron oxide

机译：掺铝燃烧氧化铁的形貌和电学性能研究

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摘要

The aluminium incorporated iron oxide samples were prepared by combustion route using aluminium nitrate and ferric trichloride as precursors. The samples were characterized for their morphological, dielectrical, impedance and thermal conductivity properties as a function of temperature. A strong low frequency dielectric dispersion is found to exist in these samples; this is ascribed to the presence of the ionized space charge carriers such as oxygen ion vacancies and interfacial polarization. The room temperature dielectric constant and the loss tangent (tan δ) at 1 kHz are 315 and 0.0855 for optimized 10 at.% Al:Fe_2O_3 sample, respectively. The frequency analysis of dielectric and ac conduction properties of these samples suggests the conduction process in these samples to be via oxygen ion vacancy motion through various defect sites. Impedance spectroscopy is used to characterize the electrical behavior. Results indicate that the relaxation mechanism of the material is temperature and frequency dependent and has dominant bulk contribution in different temperature ranges.
机译：通过燃烧路线使用硝酸铝和三氯化铁作为前体制备掺铝的氧化铁样品。表征样品的形态，介电常数，阻抗和热导率特性随温度的变化。发现这些样品中存在很强的低频介电色散。这归因于存在电离的空间电荷载流子，例如氧离子空位和界面极化。对于优化的10 at。％Al：Fe_2O_3样品，在1 kHz的室温介电常数和损耗角正切（tanδ）分别为315和0.0855。对这些样品的介电和交流传导特性进行的频率分析表明，这些样品的传导过程是通过氧离子空位运动通过各个缺陷部位进行的。阻抗谱用于表征电性能。结果表明，材料的弛豫机理与温度和频率有关，并且在不同温度范围内具有主要的体积贡献。

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