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首页> 外文期刊>Materials Chemistry and Physics >Transport and dielectric properties of α-zirconium phosphate-polyaniline composite
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Transport and dielectric properties of α-zirconium phosphate-polyaniline composite

机译：α-磷酸锆-聚苯胺复合材料的输运和介电性能

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摘要

The synthesis of conducting composite involving polyaniline in the layered zirconium hydrogen phosphate, α-Zr(HPO_4)_2·H20 (α-ZrP) and its subsequent characterization and dielectric properties are reported. Aniline monomer is introduced into the interlayer space of α-ZrP by adsorption. The encapsulated aniline is polymerized by chemical oxidative method by adding appropriate amount of ammonium peroxodisulphate (APS) solution. X-ray diffraction patterns show that the polyaniline is formed outside a-ZrP. The ac conductivity and dielectric properties are extensively studied at low temperature up to the frequency of 5 MHz. The charge transport process is due to electron and polaron tunnelling. The dielectric response exhibit broad spectra which are analyzed by Cole-Cole distribution function. The shape of dielectric spectra and the temperature dependence of relaxation time indicate the relaxor ferroelectric behavior of the composite. The microstructure and electrical transport properties are significantly different from the composite obtained by direct mixing and polymerising of α-ZrP and aniline monomer.
机译：报道了层状磷酸氢锆中含聚苯胺的导电复合材料α-Zr（HPO_4）_2·H20（α-ZrP）的合成及其表征和介电性能。通过吸附将苯胺单体引入α-ZrP的层间空间。通过加入适量的过二硫酸铵（APS）溶液，通过化学氧化方法使被包封的苯胺聚合。 X射线衍射图表明，聚苯胺在α-ZrP的外部形成。交流电导率和介电性能在低温下进行了广泛的研究，频率高达5 MHz。电荷传输过程是由于电子和极化子隧穿。介电响应表现出广谱，其通过Cole-Cole分布函数分析。介电谱的形状和弛豫时间的温度依赖性表明了复合材料的弛豫铁电行为。微观结构和电传输性能与通过直接混合和聚合α-ZrP和苯胺单体获得的复合材料明显不同。

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