Title :
Relaxor ferroelectric materials in two-dimensional transducer arrays
Author :
Davidsen, Richard E. ; Smith, Stephen W.
Author_Institution :
Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA
Abstract :
Relaxor ferroelectric materials are characterized by high dielectric permittivities and bias controllable piezoelectric response, making them attractive for ultrasonic imaging applications. We propose using relaxor ferroelectrics to multiplex a 2-D array for volumetric and B-mode imaging. Piezoelectric properties of 2-D relaxor elements were measured and used for modeling relaxor ferroelectric transducers. A variable aperture 96 element 1.5-D array was fabricated using a relaxor material and integrated with a commercial B-mode scanner to investigate its multiplexing capability
Keywords :
biomedical equipment; biomedical ultrasonics; ferroelectric materials; multiplexing; permittivity; piezoelectric materials; ultrasonic transducer arrays; 2-D array multiplexing; B-mode imaging; PZT; PbZrO3TiO3; bias controllable piezoelectric response; commercial B-mode scanner; high dielectric permittivities; multiplexing capability; piezoelectric properties; relaxor ferroelectric materials; relaxor ferroelectric transducers; two-dimensional transducer arrays; ultrasonic imaging applications; variable aperture 96 element 1.5-D array; volumetric imaging; Dielectric materials; Dielectric measurements; Ferroelectric materials; Permittivity measurement; Piezoelectric materials; Piezoelectric transducers; Relaxor ferroelectrics; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495791
