AC impedance spectroscopy and conductivity studies of Ba0.8Sr0.2TiO3 ceramics
Subrat K. Barik1, R.N.P. Choudhary2*, A.K. Singh3
1Department of Physics, National Institute of Technology Silchar, Silchar 788010, Assam, India
2Department of Physics, Institute of Technical Education & Research SOA University, Bhubaneswar 751030, India
3Department of Physics & Meteorology, IIT Kharagpur, Kharagpur 721302, W.B., India
Adv. Mater. Lett., 2011, 2 (6), pp 419-424
DOI: 10.5185/amlett.2011.2228
Publication Date (Web): Apr 08, 2012
Copyright © 2019 VBRI Press
E-mail: crnpfl@gmail.com
The AC impedance and conductivity properties of Ba0.8Sr0.2TiO3 ceramics in a wide frequency range at different temperatures have been studied. The compound was prepared by a high-temperature solid-state reaction technique. A preliminary structural analysis of the compound by X-ray diffraction technique confirmed its single phase. An ac impedance spectroscopic technique was used to correlate between the microstructure and electrical properties of the compound. The presence of both grain (bulk) and grain boundary effect in the compound was observed. The frequency-dependent electrical data were used to study the conductivity mechanism. An analysis of the electric impedance and modulus with frequency at different temperatures has provided some information to support suggested conduction mechanism.
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