Direct measurements of the electrocaloric effect in lead-free K0.5Na0.5NbO3-SrTiO3 ceramics sintered in air

Abstract

By utilizing direct measurements of the electrocaloric effect (ECE) temperature change via high-resolution calorimeter, the ECE has been studied in bulk lead-free relaxor K_0.5Na_0.5NbO₃-SrTiO₃ (KNN-STO) ceramics. Observed magnitude of the ECE confirms existence of the large EC effect in this system near the ferroelectric phase transition.