Transducer arrays from piezoelectric hollow spheres

Directional transducer arrays were prepared from lead zirconate titanate based piezoelectric ceramic hollow spheres (BBs). Compared to a single sphere, a 4/spl times/4 array of 16 spheres connected in parallel has a 22 dB higher transmitting voltage response (TVR) and a few dB higher free field volt...

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Published inISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics (IEEE Cat. No.00CH37076) Vol. 2; pp. 737 - 740 vol. 2
Main Authors Alkoy, S., Meyer, R.J., Hladky-Hennion, A.C., Hughes, W.J., Cochran, J.K., Newnham, R.E.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2000
Subjects
Acoustic arrays
Acoustic transducers
Ceramics
Electrodes
Piezoelectric materials
Piezoelectric transducers
Slurries
Titanium compounds
Ultrasonic transducers
Voltage
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Summary:Directional transducer arrays were prepared from lead zirconate titanate based piezoelectric ceramic hollow spheres (BBs). Compared to a single sphere, a 4/spl times/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.
ISBN:0780359402
9780780359406
ISSN:1099-4734
2375-0448
DOI:10.1109/ISAF.2000.942425