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A novel method to determine the electric, piezoelectric and elastic coefficients of fine scale piezoceramic fibers

: Dittmer, Robert; Rödig, Thomas; Schönecker, Andreas


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society:
IEEE International Ultrasonics Symposium, IUS 2013. Vol.1 : Prague, Czech Republic, 21 - 25 July 2013
Piscataway, NJ: IEEE, 2013
ISBN: 978-1-4673-5686-2
ISBN: 978-1-4673-5685-5
ISBN: 978-1-4673-5684-8
International Ultrasonics Symposium (IUS) <2013, Prague>
Fraunhofer IKTS ()
guided waves; measurement; piezoelectric fiber

A non-contacting, non-destructive method for the characterization of small signal properties on piezoelectric single fibers is presented. The technique comprises ultrasound generation, propagation and detection within the fiber. Two electromechanically active segments are prepared by applying two pairs of ring electrodes and subsequent poling of the interspace material. Measurements are carried out in pulse-echo-mode by transmitting and receiving ultrasound with one of the two poled segments. The other segment operates under either closed or open circuit conditions causing a small time difference during runtime measurement. Applying the piezoelectric equations, the electromechanical data k33 and d33 and the elastic compliance s33 can be calculated. The practicability of the method was tested and verified for PZT fibers derived from the polysulphone process. The validity of the ultrasound runtime measurements is proved by simulation using an electromechanical model.