Impedance Spectroscopy Characterization of ZnCo2O4 Ceramics Obtained by the Sol-Gel Method

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Transactions of the Indian Ceramic Society Pub Date : 2023-04-03 DOI:10.1080/0371750X.2023.2205600

Ş. Çavdar, Yesim Demirolmez, Neslihan Turan, H. Koralay, N. Tuğluoğlu

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Abstract

In this article, structural, morphological and electrical properties of ZnCo2O4 ceramics sample were studied. ZnCo2O4 nanoparticles were synthesized using sol-gel method. Structural and morphological properties of the sample were analyzed using X-ray diffraction and scanning electron microscope. Conductance, capacitance and impedance spectroscopy characterization of ZnCo2O4 ceramics sample were analyzed in 3 kHz-1.5 MHz frequency range and 300-500 K temperature range. Nyquist diagrams of impedance and the equivalent circuit were studied for ZnCo2O4 ceramics in the temperature range of 300-500 K. Cole-Cole curves of the impedance data were found to show a semicircular arc in both low and high temperature areas, which is expressed by the equivalent electrical circuit Rs (RgC g)(RgbQCgb ). Relaxation behavior was identified to be of non-Debye type. The Cole-Cole curve showed the negative temperature coefficient of resistance type behavior. Values of the activation energy corresponding to relaxation processes were found as 0.054 eV below 360 K and 0.561 eV above 360 K. GRAPHICAL ABSTRACT

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溶胶-凝胶法制备ZnCo2O4陶瓷的阻抗谱表征

本文研究了ZnCo2O4陶瓷样品的结构、形貌和电学性能。采用溶胶-凝胶法制备纳米ZnCo2O4。利用x射线衍射和扫描电镜对样品进行了结构和形态分析。研究了ZnCo2O4陶瓷样品在3 kHz-1.5 MHz频率范围和300-500 K温度范围内的电导、电容和阻抗特性。研究了ZnCo2O4陶瓷在300 ~ 500 K温度范围内的阻抗Nyquist图和等效电路。阻抗数据的Cole-Cole曲线在低温区和高温区均呈半圆弧状，用等效电路Rs (RgC g)(RgbQCgb)表示。松弛行为被确定为非德拜型。Cole-Cole曲线表现为负温度系数的电阻型行为。弛豫过程对应的活化能在360 K以下为0.054 eV，在360 K以上为0.561 eV。图形抽象

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.