Pb(Hf,Ti)O₃based 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.

主权项

1. A ternary piezoelectric polycrystalline material comprising:
a lead hafnium titanate containing ceramic having a formula of Pb1-xMx [{MI2+}1/3{MII5+}2/3]1-y-zHfzTiyO3, where: M is at least one of Ba2+, Ca2+, Sr2+ and La3+; MI2+ is at least one of Mg2+, Ni2+ and Zn2+; MII5+ is at least one of Nb5+, Sb5+ and Ta5+; x is greater than 0.0 and less than 0.2; y is greater than 0.2 and less than 0.8; and z is greater than 0.2 and less than 0.8.