Broadband Electromechanical Spectroscopy: A Method for Measuring the Dynamic Electromechanical Response of Ferroelectrics

摘要: To gain a better understanding of the dynamic response thermo-electro-mechanically coupled materials, in particular stiffness and mechanical damping, an experimental apparatus method called Broadband Electromechanical Spectroscopy (BES) has been developed. The motivation for creating BES was to study behavior ferroelectric materials (and other electro-active materials) over wide ranges frequencies simultaneously-applied electric fields stresses under accurate temperature control. By precisely controlling loading, effect microstructural changes, domain switching ferroelectrics, on material’s is measured. Experiments show large increases damping during that can be tuned by appropriate electrical loading. Results obtained using new capabilities brought used understand associated with wall motion able create ceramic both high damping—an elusive combination properties typical engineering materials. design use along results from tests ferroelectric, viz. lead zirconate titanate, are presented.