Improved energy storage characteristic of Yb doped 0.98(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-0.02BiAlO3 ceramics

Bi 0.4806-x Yb x Na 0.4606 Ba 0.0588 Ti 0.98 Al 0.02 O 3 (x = 0.0, 0.005, 0.01, 0.05) ceramics were processed using a solid state sintering route. Highly dense microstructure with maximum apparent density was obtained for the composition of x = 0.005. The polarization versus electric field (P-E) loop got relatively slimmer and remnant polarization decreased with an increase in x content. A maximum recoverable energy density of 0.69 J/cm 3 at a DBS of 95 kV/cm was obtained at x = 0.005 with its dielectric constant satisfying the condition of Δε r /ε r200 ° C ≤ ±15 % in a working temperature range of 97–383 °C having <0.02 dielectric loss.