[en] A new synthesis route to obtain high-purity barium titanate powder, BaTiO₃, using the molten salt method by reacting the raw materials (BaCO₃ and TiO₂) in an atmosphere of molten NaCl and KCl, has been developed. The synthesized BaTiO₃ ceramic particles have been successfully carried out at the sintering temperature 950°C for 4 hours. The Rietveld refinement of the XRD diffraction patterns was employed to characterize the structural information of the nanocrystalline BaTiO₃ ceramics. The lattice parameters (a=4.0043 Å, b=4.0308Å with space group P4mm) of tetragonal perovskite structure, as an indication of piezoelectric characteristics, have been successfully determined by the Rietveld refinement. While the crystallitte particle size and strains have been obtained for the values of 110.6 nm and 0.74 % respectively (paper)