This study investigates the influence of sodium (Na) doping on the electric and dielectric properties of tetragonal barium titanate (BaTiO₃) ceramics, specifically within the composition Ba_1-xNa_xTiO₃ (BNT) where x = 0, 0.2, 0.4, 0.6. BNT ceramics were synthesized using the tartrate precursor technique. Structural characterization of the synthesized samples was performed using Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM). The FTIR spectra confirmed the successful formation of the composite samples, with TEM analysis corroborating the presence of a uniform tetragonal crystal structure across all compositions. A single-phase formation was consistently observed, indicating the stability of the tetragonal structure upon Na doping. The dielectric properties, particularly dielectric loss, were systematically analyzed as a function of temperature under various frequencies. The results demonstrate significant changes in the dielectric behaviour with increasing Na content, suggesting potential applications of Na-doped BaTiO₃ in tunable dielectric devices and contributes to the understanding of doped BaTiO₃ ceramics for their application in advanced electronic materials.