LAUSR

Abstract The piezoelectric strain and resonance performance of 0.37BiScO3-0.6PbTiO3-0.03Pb(Mn1/3Nb2/3)O3 (BS-PT-PMN-xFe) ceramics with different amounts of Fe content addition were investigated from room temperature to 200 °C. Both the piezoelectric strain and resonance performance are improved by Fe addition in wide temperature range. Piezoelectric strain of BS-PT-PMN-xFe with 1 mol% Fe is 0.23%, which is comparable to that of BiScO3-PbTiO3 (BS-PT) ceramics, while the strain hysteresis is only one-third. At 200 °C, the high-field strain coefficient of BS-PT-PMN-Fe with 1 mol% Fe is as large as 700 pm/V. Variation of piezoelectric strain and hysteresis is clearly reducing by Fe addition. The maximum vibration velocity is enhanced up to approximately 1 m/s in 2 mol% Fe-modified BS-PT-PMnN-xFe ceramics, and the vibration velocity is stable from room temperature to 200 °C when the electric voltage magnitude was below 60 Vpp. These results indicate that BS-PT-PMN-xFe ceramics are potential candidates for high-temperature piezoelectric actuator application.