Premium
The ferroelectric properties of piezoelectric ceramic/polymer composites for acoustic emission sensors
Author(s) -
Wenger M. P.,
Almeida P. L.,
DasGupta D. K.,
Blanas P.,
Shuford R. J.
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.11438
Subject(s) - materials science , composite material , poling , piezoelectricity , epoxy , ferroelectricity , ceramic , thermosetting polymer , composite number , coercivity , polyvinylidene fluoride , polymer , polarization (electrochemistry) , hysteresis , dielectric , optoelectronics , quantum mechanics , chemistry , physics , condensed matter physics
Two different mixed connectivity composites, consisting of a ferroelectric ceramic powder of calcium modified lead titanate (PTCa) dispersed in a polymer matrix, have been fabricated and their ferroelectric properties have been investigated. Hysteresis measurements have been conducted on composites of PTCa with a polar polymer of polyvinylidene trifluoroethylene (P(VDF‐TrFE)) and PTCa with a thermosetting epoxy resin to determine the coercive fields and remanent polarization of the two different composites. The composites show noticeable differences in their behavior during poling along with the values of their piezoelectric coefficients, with the composite of PTCa/P(VDF‐TrFE) showing enhanced piezoelectric activity over that of PTCa/epoxy. This paper reports on the polarization properties and the microstructural nature of the composites.