%0 Journal Article
%T Electroactive properties of flexible piezoelectric composites
%A Sakamoto Walter Katsumi
%A Souza Edmilson de
%A Das-Gupta Dilip K.
%J Materials Research
%D 2001
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%X A flexible piezoelectric composite with 0-3 connectivity, made from Lead Zirconate Titanate (PZT) powder and vegetable-based polyurethane (PU), was doped with small amount of semiconductor powder. As a result a composite with 0-0-3 connectivity was obtained. The nature of absorption and steady state electrical conduction and the dielectric behaviour have been studied for this ceramic/polymer composite. The dielectric loss processes of the composite were observed to be dominated by those the polymer. Adding a semiconductor phase in the composite the electrical conductivity can be controlled and a continuous electric flux path could be created between the PZT grains. This composite may be poled at low voltage and in shorter time compared with composites without a conductive phase.
%K sensors
%K piezoelectricity
%K pyroelectricity
%K composites
%K complex permittivity
%K discharge current
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000300010