Title :
Numerical calculations of the acoustic properties of the 1-3 composite transducers for medical applications
Author :
Nowicki, A. ; Kycia, K. ; Hien, T.D. ; Gajl, O. ; Kleiber, M.
Author_Institution :
Inst. of Fundamental Technol. Res., Polish Acad. of Sci., Warsaw, Poland
Abstract :
The 1-3 composite transducers are superior to their piezoceramic counterparts in terms of a good acoustic matching to the biological tissue and higher electromechanical coupling coefficient with reduced impedance with no loss of sensitivity. Numerical calculations based on finite element formulation are given. Due to the large number of degrees of freedom the homogenisation process of the fundamental composite unit cell was introduced
Keywords :
acoustic impedance; biomedical equipment; biomedical ultrasonics; composite materials; finite element analysis; lead compounds; piezoceramics; piezoelectric transducers; ultrasonic transducers; 1-3 composite transducers; PZT; PZT ceramic transducers; PbZrO3TiO3; acoustic matching; acoustic properties; biological tissue; degrees of freedom; electromechanical coupling coefficient; finite element formulation; fundamental composite unit cell; homogenisation process; impedance; medical applications; numerical calculation; piezoceramic counterparts; sensitivity; Acoustic measurements; Acoustic transducers; Biomedical acoustics; Biomedical transducers; Ceramics; Composite materials; Impedance; Medical services; Solids; Tensile stress;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495741
