Publication Date:
2018-10-27
Description:
Perovskite–type NaTaO 3 (NaT) and NaNbO 3 (NaN) materials have been successfully obtained by ultrasonic method with immersed sonotrode in the reaction medium followed by annealing at 600˚C, 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 NaTaO 3 and 3.87 eV for NaNbO 3 perovskite-type samples. EDX semiquantitative analysis has highlighted the purity of the obtai...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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