Enhancement of Piezoelectricity by Novel Poling Method of the Rare‐Earth Modified BiFeO₃–BaTiO₃ Lead‐Free Ceramics

In piezoceramics, the Curie temperature (TC) and piezoelectric coefficient (d33) are often inversely proportional, so it is very difficult to optimize high piezoelectricity TC simultaneously. addition, temperature-insensitive strain (d33*) with small hysteresis also a longstanding obstacle in development of lead-free ceramics. this work, facile approach donor doping strategy adopted replace Ba2+ Yb3+, Y3+, Sm3+, Nd3+ as result, 450 °C outstanding d33 422–436 pC N−1 achieved by novel magnetic poling method. Thermally-stable performance (d33* ≈ 520–550 pm V−1 ΔST 10%) (H < 20%) results highly encourageable The main factors contributing morphotropic phase boundary, suppression defect charges doping, thermal quenching, mesoscale nanodomain size, excellent work superior those state-of-the-art piezoceramics. synergistic approaches compositional design process beneficial for sensor actuator applications.