Concurrently enhanced piezoelectric properties and stability in textured PYN–PMN–PT ceramics for actuator applications

Abstract Driven by the critical need for advanced piezoelectric materials combining high performance with operational stability in large‐displacement actuators, crystallographic texturing was introduced into Pb(Yb 1/2 Nb 1/2 )O 3 –Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PYN–PMN–PT) ceramics in this work. The textured ceramics ( F 00l ∼96%) demonstrated exceptional properties: piezoelectric coefficients d 33 = 820 pC/N and d 31 = −315 pC/N, strain coefficient S max / E max = 1166 pm/V, along with high Curie temperature ( T C = 198°C) and large coercive field ( E c = 8.3 kV/cm). Additionally, piezoelectric actuators with square tube configuration were developed. Comparative actuator tests revealed that textured PYN–PMN–PT actuators outperformed those using conventional PZT‐5H in displacement range. A 25% increase in the displacement range was achieved in textured PYN–PMN–PT actuators, and the output displacement variation was less than 1% after 10 5 continuous cycles. These results establish crystallographic texturing as a viable materials engineering approach for developing next‐generation piezoelectric devices with high performance and long‐term reliability simultaneously in precision motion applications.