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Characterization and evaluation of piezoelectric composite bimorphs for in‐situ acoustic emission sensors
Author(s) -
Wenger M. P.,
Blanas P.,
Shuford R. J.,
DasGupta D. K.
Publication year - 1999
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11441
Subject(s) - bimorph , materials science , piezoelectricity , acoustic emission , composite material , dielectric , ceramic , characterization (materials science) , epoxy , transducer , composite number , pmut , ferroelectricity , piezoelectric sensor , lead zirconate titanate , acoustics , optoelectronics , nanotechnology , physics
Mixed connectivity composites consisting of a ferroelectric ceramic powder of calcium modified lead titanate dispersed in a polymer matrix have been fabricated into piezoelectric bimorph sensors. The piezoelectric, dielectric and electromechanical coupling coefficients of these sensors have been measured and a full characterization of the electromechanical properties are reported. The suitability of these bimorph transducers as in ‐ situ acoustic emission sensors, embedded into glass‐epoxy laminate plate like structures, has been investigated. A comparison of the performance of these sensors to those of previously investigated monomorph sensors fabricated from the same material has been made.

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