Back to Search Start Over

Studies on structural, dielectric, electrical, and ferroelectric properties of the polycrystalline NaBiFe2O5.

Authors :
Panda, Debasish
Hota, Sudhansu Sekhar
Choudhary, Ram Naresh Prasad
Source :
Ferroelectrics. 2023, Vol. 617 Issue 1, p101-112. 12p.
Publication Year :
2023

Abstract

Synthesis (via solid-state reaction) and characterization (structure, microstructure, dielectric, electrical, and ferroelectric behavior) of brownmillerite polycrystalline material NaBiFe2O5 (NBFO) are discussed in this paper. The formation of a triclinic structure has been analyzed by the X-ray diffraction method. The morphology of the ceramic sample was analyzed using a field emission scanning electron microscope (FESEM) and energy-dispersive X-ray analysis (EDX). It is found that the grains are uniformly distributed through well-defined grain boundaries of the sample containing all the constituent elements (Na, Bi, Fe, and O). The study of both frequency (1 kHz–1MHz) and temperature (25–450 °C) dependent dielectric and AC-conductivity predicts the presence of Maxwell-Wagner type of dielectric dispersion and thermally activated relaxation mechanism of NBFO. The impedance spectra support the semiconducting behavior of the brownmillerite NBFO at high temperature. The resistance of the material falls with a rise in temperature favors the negative temperature coefficient resistance behavior of the material. The study of electric polarization suggests the possibility of the ferroelectric properties of the studied sample. The high dielectric constant and low tangent loss suggest the possibility of the material for device applications. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00150193
Volume :
617
Issue :
1
Database :
Academic Search Index
Journal :
Ferroelectrics
Publication Type :
Academic Journal
Accession number :
174235716
Full Text :
https://doi.org/10.1080/00150193.2023.2271141