Title :
Transducer arrays from piezoelectric hollow spheres
Author :
Alkoy, S. ; Meyer, R.J., Jr. ; Hladky-Hennion, A.C. ; Hughes, W.J. ; Cochran, J.K., Jr. ; Newnham, R.E.
Author_Institution :
Dept. of Mater. Sci. & Eng., Gebze Inst. of Technol., Turkey
Abstract :
Directional transducer arrays were prepared from lead zirconate titanate based piezoelectric ceramic hollow spheres (BBs). Compared to a single sphere, a 4×4 array of 16 spheres connected in parallel has a 22 dB higher transmitting voltage response (TVR) and a few dB higher free field voltage sensitivity (FFVS), but when the spheres are connected in a mix of series and parallel the sensitivity is 10-12 dB higher. In an array of spheres connected in parallel, increasing the sphere size from (radius=1.15 mm) to (r=1.35 mm), or increasing the radiating area results in an increase of up to 15 dB in TVR. Omnidirectional response up to 50 kHz, and directional response above that was obtained
Keywords :
lead compounds; piezoceramics; piezoelectric transducers; ultrasonic transducer arrays; 50 kHz; PZT; PbZrO3TiO3; directional response; directional transducer array; free field voltage sensitivity; lead zirconate titanate ceramic; omnidirectional response; piezoelectric hollow sphere; transmitting voltage response; Acoustic arrays; Acoustic transducers; Ceramics; Electrodes; Piezoelectric materials; Piezoelectric transducers; Slurries; Titanium compounds; Ultrasonic transducers; Voltage;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.942425
