Impact of KBiTiO3 in optical and ferroelectric behavior of NaNbO3 solid solution

• Published in: Journal of materials science. Materials in electronics 2023-11, Vol.34 (32), p.2126, Article 2126
• Main Authors: Mohanty, S. K., Behera, Banarji, Parida, B. N., Parid, R. K., Das, Piyush R.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Dielectric properties; Ferroelectric materials; Ferroelectricity; Frequency ranges; Impedance; Lead content; Lead free; Materials Science; Mixed oxides; Optical and Electronic Materials; Optical properties; Perovskites; Phase transitions; Photomicrographs; Physics; Raman spectra; Sodium compounds; Solid solutions; Spectrum analysis; Temperature; Vibration mode
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-11517-0

Embracing mixed oxide state response course, lead-free polycrystalline 0.075(K 0.5 Bi 0.5 TiO 3 )–0.925 (NaNbO 3 ) or 0.075 (KBT)–0.925 (NN) ceramic integrate, and its optical, auxiliary, dielectric, ferroelectric, and impedance properties are investigated. Basic examination represents the arrangement of new perovskite, with an orthorhombic structure having space bunch as Pmc21. FESEM micrograph proves the closeness of homogeneous nature in morphology. FTIR analysis suggests that there is a change in the vibrational mode of phonons due to the inclusion of NN with KBT. The optical band gap of the material is 3.06 eV as obtained from the diffuse absorbance spectra which is suitable for the photo-catalytic application. From Raman spectra, it is seen quite different vibrational modes from 130 to 900 cm −1 . Polarization study affirms the ferroelectric idea of the present investigation. Dielectric and complex impedance investigations are carried out in the frequency range of 10 2 –10 6  Hz and temperature range of 30–500 °C. AC conductivity range is represented by Jonscher’s power law. AC conductivity reveals the semiconducting nature of the material.