Enhanced dielectric properties in thermally etched BaBi4Ti₄O1₅

The 'relaxors' are special class of ferroelectric materials, characterized by dispersive ferroelectric phase transition, large dielectric constant and broadband temperature application. These characteristic makes them attractive candidate for many applications such as sensors, actuator, multi-layered ceramic capacitors (MLCC), ferroelectric random-access memory (F-RAM), sonar etc. The heat treatment pre and post synthesis plays a vital role in achieving desired functional properties. In present work, the effect of thermal etching on the structural, microstructure and dielectric properties of lead free BaBi₄Ti₄O1₅ (BBT) is studied in detail. The present study manifests the effect of microstructure on macroscopic dielectric response of BBT. The change in the dielectric properties is attribute to the enhancement of microstructure in thermally etched pellets. This study further suggests that macroscopic properties of ceramics can be engineered by controlling microstructure