Abstract: The purely stoichiometric SrBi₂Ta₂O₉ powder was successfully prepared by a molten salt method using Bi₂O₃, SrCO₃ and Ta₂O₃ as raw materials and
a mixture of NaCl and KCl added. The crystal structure and morphology of the powder were characterized by X-ray diffraction and scanning electron microscope. The
XRD patterns reveal that single phase SrBi₂Ta₂O₉ powder can be obtained by the molten salt method, and the SEM photographs show that the powder has a high
degree of shape anisotropy. The effect of reacting temperature on phase formation and particle size was reported. Further more the mechanism of molten salt technique was briefly discussed.

Key words: molten salt synthesis, SrBi₂Ta₂O₉