Ultra-high piezoelectric properties and labyrinthine-domain structure in (K,Na)(Ta,Nb)O₃ with phase boundaries

Abstract

(K, Na)NbO3-based materials exhibit a high potential for applications in electronic devices. Generally, to improve the piezoelectric properties to meet the requirements of applications, a polymorphic phase transition boundary is...

Stress Dynamics During O-T Phase Transitions in Lead-Free KNN-Based Piezoelectric Ceramics

“…This polymorphic phase transition (PPT) strongly affects the piezoelectric properties of KNN based ceramics [13,14]. It is attributed to the enhanced polarizability induced by the coupling between two equivalent energy states given by phase coexistence [15,16] and to its effects on the domain characteristics (also known as domain engineering [17,18]). Piezoelectric properties are improved by the adjustment of the already mentioned transition around room temperature (RT).…”