High-power piezoelectric ceramics with superior figure-of-merits through tailored grain engineering

Abstract

This study highlights the optimization of Mn-doped (1-x)Pb(Mg2/3Nb1/3O3-xPbTiO3 (PMN-PT) ceramics for highpower piezoelectric applications through a combination of (001) grain texturing with BaTiO3 seed and oxygen atmosphere sintering. The synergistic effects of Mn-induced domain-pinning and grain alignment significantly improved both the soft and hard piezoelectric properties. Optimized ceramics achieved a piezoelectric coefficient (d33) of 455 pC/N and a mechanical quality factor (Qm) of 1466, demonstrating high-performance potential. Oxygen sintering reduced porosity, further boosting mechanical stability and piezoelectric response. High-power performance tests confirmed these advancements, achieving a maximum vibration velocity of 0.45 m/s. This study underscores the potential of combining texturing and defect control to develop high-performance piezoelectric materials tailored for advanced applications in high-frequency and high-power devices.