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Piezoelectric Properties of Relaxor-based Ferroelectric Materials Near the Morphotropic Phase Boundary

XIA Feng,YAO Xi Electronic Material Research Laboratory,Xi′an Jiaotong University,Xi′an,710049,China  
Relaxor-PT materials have good piezoelectric properties near the morphotropic phase boundary.In PMN-PT,PZN-PT crystals,d 33 is up to 1500pC/N,k p is up to 92%.In PMN,PZN,PNN ceramics system,d 33 reaches 690pC/N,680pC/N and 540pC/N respectively,Q m is about 100.The electromechanical coupling factors and piezoelectric constant are very large in these materials,and these characters make these materials promising candidates for high performance solid state actuators and piezoelectric transducers.
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