Pure perovskite compound SrFeO 3 nanocrystals were successfully synthesized in molten NaNO 3 KNO 3 eutectic with Na 2 O 2 from a mixture of strontium nitrate and ferric nitrate. The effect of metal precursors, salt medium, annealing temperature (mainly 400800°C), and oxidizing properties of the melt on the phase composition, crystallite size and morphology of the resulting metal oxides were systematically studied by simultaneous TG/DSC, X-ray diffraction (XRD), scanning electron microscopy (SEM) methods. The results showed that the formation of the SrFeO 3 phase mainly depended on the nature of the metal precursor and salt medium. It was found that metal nitrates are the suitable precursors and NaNO 3 KNO 3 eutectic with Na 2 O 2 is the suitable salt medium, which results in the formation of pure SrFeO 3 nanocrystals at a much lower temperature of 400°C.
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