Abstract
Antiferroelectric(AFE) and Relaxor ferroelectric(FE) ceramics are most popular for energy storage applications. In our work we have selected compositions near the FE-AFE phase boundary in the quaternary phase PbTiO3(PT)-PbZrO3(PZ)-SrTiO3(ST)-SrZrO3(SZ). Bulk ceramics based on the composition (Pb1?xSrx)(Zr0.80Ti0.20)O3 [PSZT] with 0.14 ≤ x ≤ 0.20 were synthesized by mixed oxide method. XRD and Raman studies were carried out to understand the structural modifications as a function of Sr2+ concentration. Structure refinement using Rietveld method revealed a change from rhombohedral(R3c) for x = 0,to a coexistence of rhombohedral(R3c) and tetragonal(P4mm) for x = 0.15,and tetragonal(P4mm) for x > 0.15. Polarization - Electric field measurements revealed a systematic FE to AFE transition on A-site Sr2+- substitution. Weibull distribution analysis for all PSZT ceramics was carried out to obtain the Breakdown dielectric strength (BDS). Recoverable energy density and energy storage efficiency were evaluated from the P-E hysteresis and have been correlated with their microstructure for their potential energy storage applications.
NSTL
Elsevier