Structural, dielectric and electrical properties of BaFe0.5Nb0.5O3 ceramic prepared by solid-state reaction technique

Barium iron niobate (BaFe0.5Nb0.5O3) has been prepared by solid state reaction route through heat treatment at 1200 degree C for four hours in air. Structural properties have been investigated using X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Riet...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2011-12, Vol.131 (1-2), p.535-539
Main Authors: Ganguly, M., Parida, S., Sinha, E., Rout, S.K., Simanshu, A.K., Hussain, A., Kim, I.W.
Format: Article
Language:English
Subjects:
Dielectric properties
Dielectric relaxation
Diffraction
Heat treatment
Iron
Niobates
Polarization
Relaxors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Barium iron niobate (BaFe0.5Nb0.5O3) has been prepared by solid state reaction route through heat treatment at 1200 degree C for four hours in air. Structural properties have been investigated using X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Rietveld refinement technique has been employed to investigate the details of crystal structure and found to be cubic at room temperature with space group Pm-3m. The XRD patterns have been recorded from room temperature to 550 degree C did not show any phase transformation. Raman spectra recorded from -100 degree C to 550 degree C did not show any structural change as a function of temperature variation. Temperature dependent dielectric behavior and d.c. conductivity have been investigated from room temperature to 550 degree C. The dielectric study revealed two peaks; one for intrinsic and other for extrinsic type relaxation. Polarization study at various frequencies confirmed the hopping mechanism between Fe2+ and Fe3+ ions within the equivalent crystallographic sites of the sample. The material could be regarded as a canonical relaxor within 300 degree C.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2011.10.017