Structural and electrical characteristics of Sr(Fe2/3W1/3)O3 ceramics

Polycrystalline samples of Sr(Fe2/3W1/3)O3 (SFW) were prepared by high-energy ball-milling followed by solid-state reaction. X-ray structural analysis showed the formation of a single-phase compound in the tetragonal system, which is a distorted structure of an ideal cubic perovskite. The temperatur...

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Bibliographic Details
Published in:Materials characterization 2010-09, Vol.61 (9), p.845-850
Main Authors: CHOUDHARY, R. N. P, PRADHAN, Dillip K, TIRADO, C. M, BONILLA, G. E, KATIYAR, R. S
Format: Article
Language:English
Subjects:
Ceramics
Cross-disciplinary physics: materials science
rheology
Dielectric constant
Distortion
Exact sciences and technology
Impedance
Materials science
Milling (machining)
Perovskites
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solidification
Structural analysis
Tangents
X-rays
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Summary:Polycrystalline samples of Sr(Fe2/3W1/3)O3 (SFW) were prepared by high-energy ball-milling followed by solid-state reaction. X-ray structural analysis showed the formation of a single-phase compound in the tetragonal system, which is a distorted structure of an ideal cubic perovskite. The temperature-frequency dependence of dielectric constant and loss tangent exhibited relaxation behaviour. Studies of impedance parameters as a function of temperature and frequency confirmed the contribution of bulk resistance of SFW. The small value of activation energy of the compound (about 0.35 eV) can be explained by mixed ionic-polaronic conductivity mechanism.
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2010.05.001