Porous PZT ceramics for receiving transducers

PZT-air (porous PZT) and PZT-polymer (polymer impregnated porous PZT) piezocomposites with varying porosity/polymer volume fractions have been manufactured. The composites were characterized in terms of hydrostatic charge (d/sub h/) and voltage (g/sub h/) coefficients, permittivity, hydrostatic figu...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2003-03, Vol.50 (3), p.289-296
Main Authors: Kara, H., Ramesh, R., Stevens, R., Bowen, C.R.
Format: Article
Language:English
Subjects:
Acoustic transducers
Acoustics
Ceramics
Exact sciences and technology
Ferroelectric materials
Fundamental areas of phenomenology (including applications)
Physics
Polymers
Powders
Sonar applications
Sonar equipment
Stress measurement
Thickness measurement
Transduction
acoustical devices for the generation and reproduction of sound
Voltage
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Summary:PZT-air (porous PZT) and PZT-polymer (polymer impregnated porous PZT) piezocomposites with varying porosity/polymer volume fractions have been manufactured. The composites were characterized in terms of hydrostatic charge (d/sub h/) and voltage (g/sub h/) coefficients, permittivity, hydrostatic figure of merit (d/sub h/.g/sub h/), and absolute sensitivity (M). With decreasing PZT ceramic volume, g/sub h/ increased, and d/sub h/.g/sub h/ had a broad maximum around 80 to 90% porosity/polymer content. The absolute sensitivity was also increased. In each case, PZT-air piezocomposites performed better than PZT-polymer piezocomposites. Hydrophones constructed from piezocomposites showed slightly lower measured receiving sensitivities than calculated values for piezocomposite materials, which was due to the loading effect of the cable and the low permittivity associated with the piezocomposites.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2003.1193622