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Lead-free (Bi 0.46 Na 0.46 Ba 0.08 )Ti 1-x Ce x O 3  (abbreviated as BNBT- x Ce,  x =  0.01–0.04) ceramics were prepared via conventional solid-state mixed oxide technique. The role of B-site Ce doping was investigated through systematic studies of crystal structure, microstructure, dielectric, ferroelectric and energy-storage properties. All samples exhibited pseudocubic symmetry with an observance of single-phase perovskite structure up to  x  = 0.02. The SEM micrographs displayed dense microstructure with an average grain size that tended to decrease with increasing Ce doping content. With increasing  x , suppression of maximum relative permittivity ( εm ) and increased broadening of the  Tm  peak were observed. The change from a square-like ferroelectric to a relaxor-like slim  P-E  hysteresis loop with a significant drop of  Pr  was observed at compositions with  x  ≥ 0.01. Analysis of energy-storage properties revealed the maximum recoverable energy-storage density ( W rec) of 0.28 J/cm 3  under applied electric field of 50 kV/cm at  x  = 0.01. The results demonstrate that Ce modified BNBT ceramics are promising candidate for lead-free energy-storage capacitor applications.

Enhanced Energy Storage Properties in Lead-Free 0.92(Bi 0.5 Na 0.5 )TiO 3 –0.08BaTiO 3 Ceramics via Ce Doping