Ultrahigh piezoelectricity and temperature stability in piezoceramics by synergistic design.

Piezoceramics with both high piezoelectric properties and broad temperature usage range are highly in demand for sensor and actuator applications. Unfortunately, the trade-off relationship between two properties poses a significant challenge that remains unresolved. Herein, through combined phase boundary engineering and process engineering, we report the simultaneous achievements of substantially enhanced piezoelectric coefficient d (from 784 pC/N to 855 pC/N) and piezoelectric strain d* (from 620 pm/V to 860 pm/V), and ultrahigh temperature stability (i.