Domain engineered 〈 001 〉 oriented relaxor- PbTiO3 ferroelectric crystals exhibit high electromechanical properties and low mechanical Q values, analogous to "soft" piezoelectric ceramics. However, their characteristic low dielectric loss (0.5%) and strain-electric field hysteresis are reflective of "hard" piezoelectric materials. In this work, the electromechanical behavior of relaxor-PT crystals was investigated as a function of crystallographic orientations. It was found that the electrical and mechanical losses in crystals depends on the specific engineered domain configuration, with high Q observed for the 〈 110 〉 orientation. The high Q, together with high electromechanical coupling (∼0.9) for 〈 110 〉 oriented relaxor-PT crystals, make them promising candidates for resonant based high power transducer applications.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)