Thermal probing of constrained hysteresis loops of binary composites of Na0.5Bi0.5TiO3 and Ba0.85Sr0.15Zr0.1Ti0.9O3 ferroelectrics

Abstract

The (1-x) Na0.5Bi0.5TiO3 (NBT)-(x) Ba0.85Sr0.15Zr0.1Ti0.9O3 (BSZT) (x = 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) ceramics were prepared using solid state reaction method. The structural, microstructural, dielectric, and energy storage characteristics of the prepared system with BSZT content is examined. It is observed that Curie temperature and dielectric constant of composites suppresses with the BSZT content. The Curie Wiess fitting indicates that all ferroelectric compositions belong to diffusive class. Ferroelectric analysis emphasizes that the remnant polarization (Pr) and coercive field (Ec) decreases with BSZT content. Here, we provide detailed study on thermal scaling of constrained hysteresis loops for the synthesized system. The thermal probing reveals that the area of constraint hysteresis loop of NBT-BSZT compound are intrinsically governed by Pr parameter rather than the empirical relation 4 PrEc, observed suitable for the Mn-doped Pb(Mn1/3Sb2/3)O3–Pb(Zr,Ti)O3 ceramic (Du et al., 2013) [1]. The compositions x = 0.5 and 0.6 shows the high energy storage efficiency of ∼80% and 85%, respectively. The observed characteristics indicate that the prepared ceramics have potential applications in ferroelectrics and energy storage applications.