Pyroelectric energy harvesting and ferroelectric properties of Pb_xSr_1-xTiO₃ ceramics

Abstract

Pb x Sr 1-x TiO 3 (PST) (x = 0.3, 0.35 and 0.40, abbreviated as PST30, PST35 and PST40, respectively) ceramics were prepared by solid-state reaction route. Coexistence of tetragonal and cubic phase of ceramics is confirmed by X-ray diffraction pattern at room temperature (RT). Temperature-dependent dielectric permittivity ε r measurements showed that Pb 2+ doping increased the phase transition temperature of ferroelectric (FE) to paraelectric (PE) phase. The temperature-related polarization-electric field (P-E) measurements were performed to study the FE properties of PST ceramics. Phase transition from FE to PE was observed in P-E measurements. Furthermore, pyroelectric energy harvesting performance was evaluated based on Olsen cycle. The calculated results of pyroelectric energy harvesting density (N D ) showed that PST35 ceramic with N D = 283 kJ/m 3 (∆T = 70°C, E L = 2.5 kV and E H = 40 kV) is most potential for pyroelectric energy harvesting application near RT among all samples.