Pb(Hf,Ti)O3 BASED HIGH PERFORMANCE POLYCRYSTALLINE PIEZOELECTRIC MATERIALS

摘要

A ternary polycrystalline material based on lead hafnate (PbHfO₃) and having improved dielectric, piezoelectric, and/or thermal stability properties. The Pb(Hf,Ti)O₃ based material can exhibit enhanced electromechanical coupling factors when compared to PZT based ceramics and can be used as high performance actuators, piezoelectric sensors and/or ultrasonic transducers. The ternary polycrystalline material can have a perovskite crystal structure with an ABO₃ formula and can be characterized by a substitution of heterovalent acceptor and donor ions at A or B (Zr/Hf) sites.