Elastocaloric and Piezocaloric Effects in Lead Zirconate Titanate Ceramics

This study demonstrates that stress-driven caloric effects can be obtained in bulk lead zirconate titanate (PZT) ceramics. The strain and polarization gradient have been utilized to determine the elastocaloric and piezocaloric effects, respectively. Almost similar values are obtained up to the phase transition point (390 K), beyond which a large difference is ob-served. A peak elastocaloric temperature change of 1.9 K was obtained for an applied compressive stress of 0-400 MPa (450 K). Conversely, a maximum piezocaloric effect of 1.7 K is observed for stress values of 0-300 MPa (390 K). Overall, this study allows one to easily differentiate between caloric effects arising from polarization and strain changes.