SYNTHESIS AND CHARACTERIZATION OF LEAD-FREE SODIUM NIOBATE POWDER

Authors

  • Paulina VLAZAN National Institute of Research and Development for Electrochemistry and Condensed Matter, Timișoara, Romania. Corresponding author: rusflorinastefania@gmail.com. https://orcid.org/0000-0002-2970-0081
  • Paula SFIRLOAGA National Institute of Research and Development for Electrochemistry and Condensed Matter, Timișoara, Romania. Corresponding author: rusflorinastefania@gmail.com. https://orcid.org/0000-0002-8947-3810
  • Florina Stefania RUS National Institute of Research and Development for Electrochemistry and Condensed Matter, Timișoara, Romania. Email: rusflorinastefania@gmail.com. https://orcid.org/0000-0001-8505-0733

Keywords:

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

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.

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Published

2016-03-30

How to Cite

VLAZAN, P. ., SFIRLOAGA, P. ., & RUS, F. S. . (2016). SYNTHESIS AND CHARACTERIZATION OF LEAD-FREE SODIUM NIOBATE POWDER. Studia Universitatis Babeș-Bolyai Chemia, 61(1), 33–41. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8277

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