SBIR Phase I: Development of a Crystal Growth Process for Relaxor Ferroelectric Single Crystals

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*** 9760586 Perlov This Phase I Small Business Innovation Research project aims to develop a new approach to the growth process of and characterize as-grown single crystals of Pb(Znl/3Nb2/3)03-PbTiO3 (PZN-PT) and Po (Mg,/3Nb2/3) 03 -PbTiO3 (PMN-PT). These materials have unique properties that include very high longitudinal coupling coefficient (90%), large dielectric constants (1000-5000), low dielectric loss (0.01), and exceptionally high piezoelectric coefficients (d33 2000 pC/N). and (d33 These exceptional properties have established PZN-as very attractive materials for low frequency acoustic transduction, ultrasonic biomedical imaging and actuation. However, large single crystals of good quality are not available. Applications of PZN-PT and PMN-PT single crystals will include low frequency acoustic transduction (hydrophones, passive listening devises), ultra sound sensors for biomedical imaging and electromechanical actuators (laser optics, precision machinery and small motors). ***