LaNiO3/Co3O4纳米复合材料介电性能随频率变化的研究

IF 4.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Omega Pub Date : 2025-06-01 DOI:10.1021/acsomega.4c1119910.1021/acsomega.4c11199

Ala Eddin Mabrouki*, Olfa Messaoudi, Ahmed Dhahri, Arwa Azhary, Moufida Mansouri and Latifah Alfhaid,

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引用次数: 0

摘要

本文详细研究了LaNiO3/Co3O4纳米复合材料的介电性能、交流电导率、电模量和阻抗谱。该复合材料采用改性柠檬酸凝胶自燃烧法制备。透射电子显微镜和原子力显微镜图像显示不同形状和大小的非均匀纳米颗粒。阻抗分析表明，纳米复合材料具有负的电阻温度系数和半导体性能。奈奎斯特图显示了一条半圆曲线。研究发现，交流电的电导率与温度和频率都有关，符合琼舍尔幂定律，电导率由一个突然的跳变过程控制。耗散系数高，随频率增加而减小。定义了纳米复合材料的非德拜弛豫类型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Investigation of the Frequency-Dependent Dielectric Properties of the As-Prepared LaNiO3/Co3O4 Nanocomposites

This article presents a detailed study of the dielectric properties, AC conductivity, electric modulus, and impedance spectroscopy of the LaNiO₃/Co₃O₄ as-prepared nanocomposite. The composite was prepared using the modified citrate gel autocombustion method. Transmission electron microscopy and atomic force microscopy images revealed nonuniform nanoparticles of varying shapes and sizes. Impedance analysis indicated a negative temperature coefficient of resistance and semiconducting behavior of the nanocomposite. The Nyquist plot displayed one semicircular curve. The AC conductivity was found to be dependent on both temperature and frequency, adhering to Jonscher’s power law, with conductivity governed by a sudden hopping process. A high dissipation factor was observed, which decreased with frequency. A non-Debye relaxation type was defined for the nanocomposite.

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来源期刊

ACS Omega Chemical Engineering-General Chemical Engineering

CiteScore

6.60

自引率

4.90%

发文量

3945

审稿时长

2.4 months

期刊介绍： ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.