Dielectric and piezoelectric properties of Pb(In_1/2Nb_1/2)O₃-PbZrO₃-PbTiO₃ceramics via different poling methods

High-temperature piezoelectric materials require simultaneously high piezoelectric properties, high Curie temperature and high temperature stability. In this study, (0.75-x)Pb(In_1/2Nb_1/2)O₃-0.25PbZrO₃-xPbTiO₃(PIN-PZ-PT) ceramics were prepared by conventional ceramic preparation process. By modifying lead zirconate titanate (PZT) materials with relaxor Pb(In_1/2Nb_1/2)O₃(PIN), excellent piezoelectric properties and high Curie temperatures (T_C) were achieved simultaneously. The most comprehensive performance is achieved in 0.32PIN-0.25PZ-0.43PT ceramics, which has great piezoelectric properties (d₃₃of 396 pC/N, k_pof 0.49, the unipolar strain S_maxof 0.21 %, and d₃₃∗ of 516 pm/V under 40 kV/cm) and remarkable temperature stability (high T_Cof 360 °C and low dielectric loss of less than 1 % in the temperature range of 100–400 °C). To further enhance the performance of the 0.32PIN-0.25PZ-0.43PT ceramic, we adopt a novel high-temperature poling which involves poling at temperatures around 20 °C above the T_Cin the air, and obtain higher piezoelectric properties (d₃₃of 446 pC/N, k_p ∼ 0.57, S_max ∼ 0.23 %, and d₃₃∗ of 530 pm/V) without sacrificing the temperature stability. This work could be a guide for the study of high temperature piezoelectric materials.