Structural and Optical Properties of Perovskite-Type Compounds Obtained by Ultrasonic Method

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Abstract

Perovskite-type NaTaO3 (NaT) and NaNbO3 (NaN) materials have been successfully obtained by ultrasonic method with immersed sonotrode in the reaction medium followed by annealing at 600oC, for 6 h. The influence of thermal treatment on phase composition, particle size, and morphology of the obtained materials have been investigated by X-ray diffraction (XRD), Diffuse reflectance ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), and semiquantitative elemental analysis - EDX. The average size of the crystallites of NaT materials was found to be 37.7 nm while that of NaN materials was found to be 30.5 nm. The optical band gap was determined using Kubelka-Munk equation from UV-Vis spectroscopic measurements and is estimated to be 4.05 eV for NaTaO3 and 3.87 eV for NaNbO3 perovskite-type samples. EDX semiquantitative analysis has highlighted the purity of the obtained materials, and quantification confirmed the stoichiometry of the compounds (ABO3).

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Sfirloaga, P., Stoia, M., Poienar, M., & Vlazan, P. (2018). Structural and Optical Properties of Perovskite-Type Compounds Obtained by Ultrasonic Method. In IOP Conference Series: Materials Science and Engineering (Vol. 416). Institute of Physics Publishing. https://doi.org/10.1088/1757-899X/416/1/012067

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