Abstract
Pure Na0.5Sr0.25NbO3 particles were successfully synthesized using the molten salt synthesis method in the SrCO3+Nb2O5+KCl+NaCl system, which could not be obtained in the SrCO3+Nb2O5+NaCl system. The result suggested that the fabrication process of Na0.5Sr0.25NbO3 was different for the two systems. In the SrCO3+Nb2O5+NaCl system, NaSr2Nb5O15 formed and then converted into Na0.5Sr0.25NbO3. In the SrCO3+Nb2O5+KCl+NaCl system, Na0.5Sr0.25NbO3 could be obtained directly by the reaction between the intermediate KSN and NaCl. The effects of the NaCl salt content and heated temperature on the purity and size of particles were investigated. Pure Na0.5Sr0.25NbO3 powder crystals with uniform particle size could be prepared at the heated temperature of 1,200 °C and NaCl salt-to-oxide ratio of 2, which were ideal raw material for preparing Na0.5Sr0.25NbO3 ceramics.
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