Title :
Analysis of cross-coupling characteristics of piezocomposites 1-3
Author :
Negreira, C.A. ; Gomez, H. ; Aulet, A. ; Eiras, J.A. ; Bassora, L.A.
Author_Institution :
Lab. Acustica Ultrasonora, Univ. de la Republica, Montevideo, Uruguay
Abstract :
Some of the problems developing a 1-3 piezocomposite for medical and NDT imaging are examined. In the case of piezocomposite plates, lateral resonances are generated by multiple Bragg scattering of Lamb waves. Plate samples in polyurethane-PZT5A have been prepared with a ceramic square rod geometry. The individual elements are excited by electrical and ultrasound pulses. The electrical cross-coupling characteristics are analysed. We identified two separate cross-coupling waves and saw the origin of the lateral waves which produce multiple Bragg scattering
Keywords :
biomedical ultrasonics; piezoceramics; piezoelectric transducers; surface acoustic waves; ultrasonic materials testing; ultrasonic transducer arrays; ultrasonic velocity; Lamb waves; NDT imaging; PZT; PbZrO3TiO3; ceramic square rod geometry; cross-coupling characteristics; cross-coupling waves; electrical pulse excitation; lateral resonances; lateral waves; medical imaging; multiple Bragg scattering; piezocomposite plates; piezocomposites 1-3; polyurethane-PZT5A; transducer elements; ultrasound pulse excitation; Acoustic scattering; Acoustic transducers; Bioceramics; Biomedical imaging; Ceramics; Couplings; Medical diagnostic imaging; Polymers; Resonance; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495737
