Abstract
The polycrystalline sample of BiFe1−xNbxO3 (BFNO) (where x = 0.00, 0.10, and 0.20) (BFO, BFNO-1, and BFNO-2) bulk ceramics has been synthesized by cost-effective high-temperature solid-state reaction technique. Structural properties of the prepared samples were investigated through X-ray diffraction (XRD) techniques. The preliminary structural analysis of the samples confirmed that the structures of Nb-doped BiFeO3 samples are rhombohedral with space group R3c. The UV–Vis-spectroscopy analysis reveals that the absorbance value decreases with the increase in concentration, and the calculated optical band gap value lies between 2.3 and 3.47 eV. The frequency response of the ceramic materials has been reported within the range of (1 kHz–1 MHz) with the variation of temperature (30–500 °C). The impedance analysis exhibits the presence of grain and grain boundary effects, and the existence of NTCR behaviour in the materials. The frequency dependence of ac conductivity of the material follows Jonscher’s universal power law, confirmation of the analysis’s reliability, and sample’s high quality.
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Acknowledgements
The authors are thankful to Dr. Bhagaban Kishan of Utkal University, Bhubaneswar for providing XRD, UV-Visible spectroscopy facilities.
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SP contributed towards methodology, reviewing, interpretation of results, resources and editing of the manuscript. DP contributed towards data collection, analysis, experiment, interpretation of the results and writing the manuscript. PP contributed towards sample preparation, analysis, and experiment, RNPC contributed towards supervision, reviewing, and interpretation of results. The entire creator participated in the analysis to depict the experimental conclusion.
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Pattanayak, D., Pattanayak, S., Priyadarshnee, P. et al. Enhanced electrical and photo catalytic behaviour of Nb-substitution on Fe-site of BiFeO3 ceramics. J Mater Sci: Mater Electron 34, 1900 (2023). https://doi.org/10.1007/s10854-023-11264-2
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DOI: https://doi.org/10.1007/s10854-023-11264-2