Electric properties of single-crystal PMN-31% PT epoxy 1-3 piezoelectric composites

PMN-31% PT/expoxy 1-3 piezoelectric composites with a different volume fraction of PMN-31% PT single crystals from 0.4 to 0.7 have been studied as regards fabrication and electric properties. The < 001 > oriented piezoelectric composites exhibit functional properties of low dielectric constant, high electromechanical coupling coefficient (0.80), and low acoustic impendence compared to the < 110 > oriented ones. The vibration characteristics of the piezoelectric composites strongly depend on the rod geometry and the volume fraction. The results obtained indicate that these piezoelectric composites with better global properties are promising candidates for biomedical imaging and underwater transducer applications.