Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29498
Title: Piezoelectric PMN-PT fibre hydrophone for ultrasonic transducer calibration
Authors: Lau, ST
Lam, KH
Chan, HLW 
Choy, CL 
Luo, HS
Yin, QR
Yin, ZW
Issue Date: 2005
Publisher: Springer
Source: Applied physics. A, Materials science & processing, 2005, v. 80, no. 1, p. 105-110 How to cite?
Journal: Applied physics. A, Materials science & processing 
Abstract: A newly developed ceramic fibre hydrophone with an active element as small as 0.25 mm in diameter is described in this work. Lead magnesium niobate-lead titanate (PMN-PT) ceramic fibre with a nominal composition of 0.65Pb(Mg 1/3Nb2/3)O3-0.35PbTiO3 was fabricated by an extrusion method. PMN-PT single crystals were ground to a powder form and then mixed with poly(acrylic) acid to form a homogenous slurry. The fibre was extruded by pressing the slurry through a spinneret and then sintering at 1250°C for crystallization. The electrical characteristics of the PMN-PT fibre were evaluated by measuring the relative permittivity and the impedance spectrum. A piezoelectric PMN-PT fibre hydrophone was fabricated and its sensitivity, angular response, and spatial resolution were evaluated. The fibre hydrophone provides good spatial resolution, angular response and receiving sensitivity.
URI: http://hdl.handle.net/10397/29498
ISSN: 0947-8396
EISSN: 1432-0630
DOI: 10.1007/s00339-004-2908-3
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