Finite-size-effect on a very large length scale in NBT-based lead-free piezoelectrics

Abstract

[Formula: see text][Formula: see text]TiO3-based lead-free piezoelectrics are considered for potential replacement of the lead-based commercial piezoceramics in high-power transducer applications. We have examined the role of grain size in influencing the structural-polar inhomogeneity of stoichiometric and off-stoichiometric [Formula: see text][Formula: see text]TiO3 (NBT), and its morphotropic-phase-boundary (MPB) derivative 0.94[Formula: see text][Formula: see text]TiO3-0.06BaTiO3 (NBT-6BT). Our study reveals that size effect comes into play in these systems on a very large length scale (on the scale of microns) considerably affecting its global structure and properties.

Perspective on the development of high performance flexible piezoelectric energy harvesters

“…Rather at an intermediate grain size, properties become maxima, felicitated by the enhanced domain wall mobility 75 and/or maximum polar structural heterogeneity survives in the poled state of the ceramics. 76,77 This journal is © The Royal Society of Chemistry 2022…”