Piezoelectric ceramic polymer composites with 1-3 connectivity have generated considerable interest for their potential application in medical ultrasound due to their high electromechanical coupling coefficient k t, low planar coupling coefficient kp and better acoustic matching to tissue. Conventional tools and setup show some limitation for the complete evaluation and characterization of ultrasound imaging transducer. This paper shows how to measure the piezoelectric deformation constant d33 of a specimen that has been prepared using the dice-and-fill technique. For this purpose, we perform the PFM technique via an AFM. The inverse piezoelectric response of the PZT ceramics confirmed the linearity hypothesis of the piezoelectric behavior for such composites with applied ddp in the range of 1+10V at frequency of 1 kHz. There are no direct measurements of such behavior in the literature. This method provides to piezocomposite array designers a quasi-static characterization of the transducer, and contributes to the advanced optimization of bandwidth, cross coupling and sensitivity of ultrasound imaging array transducers. © 2005 IEEE.
AFM characterization of 1-3 Piezocomposite Arrays / Marinozzi, Franco; Bini, Fabiano; Passeri, Daniele; Grandoni, A.. - ELETTRONICO. - 4:(2005), pp. 1905-1908. (Intervento presentato al convegno 2005 IEEE Ultrasonics Symposium tenutosi a Rotterdam; Netherlands nel 18-21 september) [10.1109/ULTSYM.2005.1603245].
AFM characterization of 1-3 Piezocomposite Arrays
MARINOZZI, Franco;BINI, FABIANO;PASSERI, Daniele;
2005
Abstract
Piezoelectric ceramic polymer composites with 1-3 connectivity have generated considerable interest for their potential application in medical ultrasound due to their high electromechanical coupling coefficient k t, low planar coupling coefficient kp and better acoustic matching to tissue. Conventional tools and setup show some limitation for the complete evaluation and characterization of ultrasound imaging transducer. This paper shows how to measure the piezoelectric deformation constant d33 of a specimen that has been prepared using the dice-and-fill technique. For this purpose, we perform the PFM technique via an AFM. The inverse piezoelectric response of the PZT ceramics confirmed the linearity hypothesis of the piezoelectric behavior for such composites with applied ddp in the range of 1+10V at frequency of 1 kHz. There are no direct measurements of such behavior in the literature. This method provides to piezocomposite array designers a quasi-static characterization of the transducer, and contributes to the advanced optimization of bandwidth, cross coupling and sensitivity of ultrasound imaging array transducers. © 2005 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
