Structural refinement, optical and ferroelectric properties of microcrystalline Ba(Zr sub(0.05)Ti sub(0.95))O sub(3) perovskite

For this study, a microcrystalline Ba(Zr sub(0.05)Ti sub(0.95))O sub(3) (BZT) powder was prepared by a high energy ball milling method followed by calcination at 1100 degree C for 4 h. The calcined powder was structurally characterized by X-ray diffraction and Rietveld refinement data, which showed...

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Bibliographic Details
Published in:Current applied physics 2014-05, Vol.14 (5), p.708-715
Main Authors: Badapanda, T, Sarangi, S, Behera, B, Sahoo, P K, Anwar, S, Sinha, T P, Luz, GE Jr, Longo, E, Cavalcante, L S
Format: Article
Language:English
Subjects:
Band spectra
Clusters
Diffraction
Distortion
Ferroelectric materials
Ferroelectricity
Roasting
Titanium dioxide
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Summary:For this study, a microcrystalline Ba(Zr sub(0.05)Ti sub(0.95))O sub(3) (BZT) powder was prepared by a high energy ball milling method followed by calcination at 1100 degree C for 4 h. The calcined powder was structurally characterized by X-ray diffraction and Rietveld refinement data, which showed that this material has a perovskite-type tetragonal structure with a space group of (P4mmm). The micro-Raman spectrum revealed local lattice distortions due to distorted octahedral [TiO sub(6)] clusters. The temperature and frequency-dependent dielectric study of the BZT ceramic showed normal phase transition behavior. The ferroelectric property was studied by a P-E hysteresis loop. Optical band gap was investigated by ultraviolet-visible (UV-vis) absorption spectroscopy at room temperature. The UV-vis spectrum indicated that the BZT powder has an optical band gap of 3.15 eV.
ISSN:1567-1739
DOI:10.1016/j.cap.2014.02.015