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Lesser-known piezoelectric and pyroelectric applications of electroactive polymers

Published online by Cambridge University Press:  01 February 2011

Sidney B. Lang  and
Supasarote Muensit
Sidney B. Lang
Affiliation:
lang@bgu.ac.il, Ben-Gurion University of the Negev, Chemical Engineering, POB 653, Beer Sheva, N/A, 84105, Israel, 972-8-6461490
Supasarote Muensit
Affiliation:
supasarute.m@psu.ac.th, Prince of Songkla University, Physics, Thailand
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Abstract

The piezoelectric effect was first observed in polyvinylidene fluoride polymer (PVDF) in 1969 and the pyroelectric effect was found several years later. A number of additional ferroelectric polymers have been discovered since that time including the copolymer PVDF with trifluoroethylene (P(VDF-TrFE)), and the odd-numbered nylons. A large number of applications of piezoelectricity and pyroelectricity have been developed. The magnitudes of the effects in polymers are much lower than those of ferroelectric ceramics (an exception is the piezoelectric effect in porous polymers). However, other factors make these very desirable materials for applications. The polymers have low permittivities, low acoustic impedances and low thermal conductivities. They are available in large area sheets and they are flexible and relatively low in cost. Major applications include microphones and loudspeakers, ultrasonic devices, SAW transducers, actuators, infrared detectors and many others. This review will describe some of the lesser-known applications of these materials in the fields of tactile devices, energy conversion, porous polymers, property measurement, pyroelectric infrared sensors, shock sensors and space science.

Keywords

piezoelectricpolymerpiezoresponse
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 889: Symposium W – Electroresponsive Polymers and Their Applications , 2005 , 0889-W01-01
Copyright
Copyright © Materials Research Society 2006

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