NDLI: P2O-2 Exploring the Advantages of a Random 1-3 Connectivity Piezocomposite Structure Incorporating Piezoelectric Fibres as the Active Element

Content Provider	IEEE Xplore Digital Library
Author	Harvey, G. Gachagan, A. Mackersie, J.W. Banks, R.
Copyright Year	2006
Description	Author affiliation: Centre for Ultrasonic Eng., Strathclyde Univ., Glasgow (Harvey, G.; Gachagan, A.; Mackersie, J.W.; Banks, R.)
Abstract	This paper describes the use of piezoelectric ceramic fibres (PZT5A) for the fabrication of 1-3 composite transducers. Importantly, extensive FE analysis, using the PZFlex code, of these devices has been undertaken with complete 3D models utilised to reflect the random nature of the device structure. The manufacturing process is based on the place-and-fill method. A fibre composite block is produced, from which it is then possible to slice a number of layers of piezoelectric material with a thickness corresponding to the desired frequency of operation. These layers have electrodes applied and are then poled. Electrical impedance profiles of each device demonstrate excellent unimodal behaviour at the thickness resonance frequency, and show excellent correspondence with the FE models. Moreover, these devices possess high electromechanical coupling coefficients (kt > 0.65) for a ceramic volume fraction of 50% and a medium-set polymer (CIBA GEIGY CY221-HY956). Laser vibrometry scans of transducer surface motion corroborate the FE predictions of average uniform surface displacement notwithstanding local variations due to the random nature of the microstructure. Experimental pulse-echo assessments, when operating into a water load, demonstrate comparable sensitivity and bandwidth characteristics between a random fibre and conventional 1-3 composite, with similar specification
Starting Page	1903
Ending Page	1906
File Size	460534
Page Count	4
File Format	PDF
ISBN	1424402018
ISSN	10510117
DOI	10.1109/ULTSYM.2006.485
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-02
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber devices Iron Ceramics Surface emitting lasers Fabrication Piezoelectric transducers Manufacturing processes Piezoelectric materials Frequency Electrodes
Content Type	Text
Resource Type	Article

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