Volume 6, Issue 1, January 2017, Page: 54-64
Effect of Vanadium Doping on Microstructure and Dielectric Behavior of CaCu3Ti4O12 Ceramics
Séka Simplice Kouassi, Laboratory of Environmental and Materials Chemistry, Jean Lorougnon GUEDE University, Daloa, Ivory Coast
Jean-Pierre Sagou Sagou, Laboratory of Materials Inorganics Chemistry, Félix Houphouët BOIGNY University, Abidjan, Ivory Coast
Cécile Autret-Lambert, GREMAN UMR 7347 Laboratory, François Rabelais University, Tours, France
Sonia Didry, GREMAN UMR 7347 Laboratory, François Rabelais University, Tours, France
Anoop Nautiyal, GREMAN UMR 7347 Laboratory, François Rabelais University, Tours, France
Marc Lethiecq, GREMAN UMR 7347 Laboratory, François Rabelais University, Tours, France
Received: Dec. 16, 2016;       Accepted: Dec. 27, 2016;       Published: Jan. 21, 2017
DOI: 10.11648/j.ijmsa.20170601.18      View  3175      Downloads  84
Abstract
In this work, effect of vanadium doping of CaCu3Ti4O12 (CCTO) on microstructure and complex dielectric constant over wide frequency (100 Hz-1 MHz) and temperature (0°C – 160°C) ranges has been studied. The vanadium doping of CCTO system results in an increase of grain size, the grains being surrounded by melted-like grain boundaries. Real parts of dielectric constant of all samples are similar at low frequency (<1 kHz). In doped samples, above 1 kHz, a relaxation appears which is evidenced by a drop of real part of permittivity and a peak of its imaginary part. This relaxation phenomenon is very significant at relatively low doping rates and then decreases again as vanadium content increases. AC conductivity behavior of vanadium-doped CCTO can be divided in three regions depending on conduction processes. The calculated activation energies were close to 0.46 eV.
Keywords
Ceramics, Solid State Reaction Method, Microstructure, Dielectric Properties, Electrical Conduction
To cite this article
Séka Simplice Kouassi, Jean-Pierre Sagou Sagou, Cécile Autret-Lambert, Sonia Didry, Anoop Nautiyal, Marc Lethiecq, Effect of Vanadium Doping on Microstructure and Dielectric Behavior of CaCu3Ti4O12 Ceramics, International Journal of Materials Science and Applications. Vol. 6, No. 1, 2017, pp. 54-64. doi: 10.11648/j.ijmsa.20170601.18
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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