STUDIA UNIVERSITATIS

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STUDIA CHEMIA - Issue no. 1 / 2016

Article:

SYNTHESIS AND CHARACTERIZATION OF LEAD-FREE SODIUM NIOBATE POWDER.

Authors: .

Abstract: Sodium niobate (NaNbO₃) fine powders were synthesized by hydrothermal method using ammonium niobate (V) oxalate hydrate (C₄H₄NNbO₉ x H₂O), sodium hydroxide (NaOH) and sodium citrate hydrate (C₆H₉Na₃O₉) as precursors. The samples were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), AFM (Atomic Force Microscopy), UV-VIS spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR).

X-ray diffraction for powder obtained by hydrothermal method revealed three phases mixture (NaNbO₃, Nb₂O₅, Na₂C₂O₄). In order to obtain a material with perovskite structure, the powder was treated for 6 h at 600°C. After calcination, the X-ray powder diffraction (XRD) patterns shown reflections of a pure cubic structure (space group Pm-3m) with lattice parameters (a=b=c=3.909Å) comparable to those reported in the literature. The average particle sizes estimated by SEM image were 2-3 micrometers.

Keywords: sodium niobate, hydrothermal method, X-ray diffraction, scanning electron microscopy

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	The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.


	STUDIA CHEMIA - Issue no. 1 / 2016

	Article:	SYNTHESIS AND CHARACTERIZATION OF LEAD-FREE SODIUM NIOBATE POWDER. Authors: .


	Abstract: Sodium niobate (NaNbO₃) fine powders were synthesized by hydrothermal method using ammonium niobate (V) oxalate hydrate (C₄H₄NNbO₉ x H₂O), sodium hydroxide (NaOH) and sodium citrate hydrate (C₆H₉Na₃O₉) as precursors. The samples were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), AFM (Atomic Force Microscopy), UV-VIS spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). X-ray diffraction for powder obtained by hydrothermal method revealed three phases mixture (NaNbO₃, Nb₂O₅, Na₂C₂O₄). In order to obtain a material with perovskite structure, the powder was treated for 6 h at 600°C. After calcination, the X-ray powder diffraction (XRD) patterns shown reflections of a pure cubic structure (space group Pm-3m) with lattice parameters (a=b=c=3.909Å) comparable to those reported in the literature. The average particle sizes estimated by SEM image were 2-3 micrometers. Keywords: sodium niobate, hydrothermal method, X-ray diffraction, scanning electron microscopy




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