A facile synthesis of NaNbO3 powders was performed by solid-state reaction at low temperature. Stoichiometric ammonium niobium oxalate and Na2CO3 were mixed in water and then calcined at different temperatures for various times after drying. A combination of X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy and thermogravimetric (TG) analysis was used to characterize the product and precursor compound. The XRD patterns show that single-phase NaNbO3 powders with high crystallinity can be synthesized at 425 °C for 15 min. The particle size from XRD data is found to be about 40 nm for NaNbO3 powders calcined at 500 °C for 3 h, which is in good agreement with SEM data. The SEM photograph shows that NaNbO3 powders are cuboid-like and well crystallized when calcination at 800 °C for 3 h. The product compositions prepared using other sodium reactants, such as HCOONa and NaNO3, are also discussed.
Research on Chemical Intermediates – Springer Journals
Published: Aug 17, 2010
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