Effect of Pr3+ substitution on structural, dielectric and energy storage properties of Ba0.1Bi0,9(Ti0.9Zr0.1)0.1Fe0.9O3 ceramic

The praseodymium Pr3+ doped at Bi site of Ba0.1Bi0.9(Ti0.9Zr0.1)(0.1)Fe0.9O3, under low concentrations (0%, 0.1%, 0.5% and 1% abbreviated as BBTZF0, Pr-BBTZF001, Pr-BBTZF005 and Pr-BBTZF01, respectively) were prepared by the solid-state reaction method. A detailed investigation has been made on structural, microstructural, ferroelectric and dielectric properties of Ba-0.1(Bi1-xPrx)(0.9)(Ti0.9Zr0.1)(0.1)Fe0.9O3 ceramics. Rietveld refinement fitting revealed that the structure of these ceramics, at room temperature is rhombohedral with space group R3c. The cell volume decreased with increasing Pr-content due to the smaller ionic radius of the Pr. Temperature dependence of the dielectric constant (& epsilon;& PRIME;(r)) of all prepared ceramics showed anomaly around T-N (antiferromagnetic transition temperature); thus suggesting a magneto-electric coupling in these materials. The shift of T-N with frequency is attributed to the Maxwell Wagner relaxation rather than the relaxor behavior. The P-E loop study shows the improved ferroelectric behavior and the reduced leakage current density with Pr doping. Moreover, the energy storage properties showed a clear enhancement upon the increase of the Pr concentration. The recoverable energy storage density (W-rec) of 2.75 J cm(-3) with energy storage efficiency (& eta;) of 44.52% was achieved for Pr-BBTZF01.