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Effective poling of hard PZT ceramics for high-power ultrasound applications

: Eßlinger, Sophia; Neumeister, Peter; Schönecker, Andreas

Borgmann, Hubert ; Wirtschaftsförderung Bremen GmbH -WFB-:
Actuator 2014, 14th International Conference on New Actuators & 8th International Exhibition on Smart Actuators and Drive Systems. Conference Proceedings : 23-25 June 2014, Bremen, Germany
Bremen: Messe Bremen, 2014
ISBN: 978-3-933339-23-2 (CD-ROM)
ISBN: 978-3-933339-22-5 (Print)
ISBN: 978-3-933339-24-9 (Print + CD-ROM)
pp.53-55, Datei A1.3
International Conference on New Actuators <14, 2014, Bremen>
International Exhibition on Smart Actuators and Drive Systems <8, 2014, Bremen>
Conference Paper
Fraunhofer IKTS ()
piezoceramics; temperature variation; piezoelectric losses; ultrasound application; hard PZT; poling

For high power ultrasound transducers, the poling condition of the piezoceramic is crucial for stable and continuous operation. In this investigation, poling during the temperature-timepaths heating and cooling in addition to poling at constant temperatures were investigated and evaluated regarding the achieved poling result.The planar coupling factor and large signal loss factor are used for characterization. From the results, poling process parameters can be derived, minimizing losses while maximizing the electromechanical coupling.