The mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO ceramics.

(K,Na)NbO based ceramics are considered to be one of the most promising lead-free ferroelectrics replacing Pb(Zr,Ti)O. Despite extensive studies over the last two decades, the mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO ceramics has not been fully understood. Here, we combine temperature-dependent synchrotron x-ray diffraction and property measurements, atomic-scale scanning transmission electron microscopy, and first-principle and phase-field calculations to establish the dopant-structure-property relationship for multi-elements doped (K,Na)NbO ceramics.

High-Performance Sm-Doped Pb(MgNb)O-PbZrO-PbTiO-Based Piezoceramics.

High-performance piezoelectric materials are pivotal to many electromechanical applications including piezoelectric actuators, sensors, and transducers. However, the general approach to achieve high piezoelectric properties by establishing morphotropic phase boundary (MPB) has limitation due to the weak anisotropy of the Gibbs free energy profile at the MPB region. Here, aliovalent Sm-doped 0.