IMF2017

(Ba_1-zLa_z)(Ti_0.95Sn_0.05)O₃ (z = 0.0-0.035) ceramics were synthesized via the conventional solid state reaction method and characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Raman spectroscopy. Further their dielectric and ferroelectric properties were investigated. XRD measurements indicate the formation of a single and highly crystalline phase for all ceramic samples. The microstructural investigation from SEM indicates that a low La-doping of 1.5 and 2.5 atomic% inhibits the grain growth, while higher amounts of La-doping of 3.5 atomic % in barium stannate titanate (BTS) yielded the larger leafy grains. Raman spectroscopy suggests the substitution of La³⁺ ions at an A-site sublattice. Dielectric properties measurement revealed an enhanced dielectric permittivity constant with peak broadening. The discharge energy density obtained from the polarization versus electric field (P-E) hysteresis loops. The value of discharge energy density (J_d) ~ 0.21 J/cm³ was obtained for 2.5 atomic % of the La-doped sample, which is almost ~ 2.3 times higher than that of pure BTS sample (~ 0.09 J/cm³). Thus, the present study could lead to a new dimension in designing and application of the energy storage capacitors.