Impedance Spectroscopy Characterization of ZnCo2O4 Ceramics Obtained by the Sol-Gel Method
Transactions of the Indian Ceramic Society, vol.82, no.2, pp.136-142, 2023 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 82 Issue: 2
- Publication Date: 2023
- Doi Number: 10.1080/0371750x.2023.2205600
- Journal Name: Transactions of the Indian Ceramic Society
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
- Page Numbers: pp.136-142
- Keywords: Frequency, Impedance spectroscopy, Sol-gel method, Temperature, ZnCo2O4
- Gazi University Affiliated: Yes
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.