De Campos Fuzari Jr, GilbertoOrlandi, Marcelo Ornaghi [UNESP]Longo, Elson [UNESP]Melo, Washington Luiz de BarrosSakamoto, Walter Katsumi [UNESP]2014-05-272014-05-272013-02-01Smart Materials and Structures, v. 22, n. 2, 2013.0964-17261361-665Xhttp://hdl.handle.net/11449/74492Composite films made of lead zirconate titanate ceramic particles coated with polyaniline and poly(vinylidene fluoride) - PZT-PAni/PVDF were produced by hot pressing the powder mixtures in the desired ceramic volume fraction. The ceramic particles were coated during the polyaniline synthesis and the conductivity of the conductor polymer was controlled by different degrees of protonation. Composites were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), ac and dc electrical measurements, the longitudinal d33 piezo coefficient and the photopyroelectric response. Results showed that the presence of PAni increased the dielectric permittivity of the composite and allowed better efficiency in the poling process, which increased the piezo- and pyroelectric activities of the composite film and reduced both the poling time and the poling electric field. The thermal sensing of the material was also analyzed, showing that this composite can be used as pyroelectric sensor. © 2013 IOP Publishing Ltd.engCeramic particleCeramic volume fractionDC electricalDielectric permittivitiesLead zirconate titanate ceramicsPoling electric fieldsPoling processPoly(vinylidene fluoride)Powder mixturesPyroelectric sensorsThermal sensingElectric fieldsFourier transform infrared spectroscopyHot pressingPermittivityPolyanilineScanning electron microscopySemiconducting lead compoundsSynthesis (chemical)Volume fractionComposite filmsArtigo10.1088/0964-1726/22/2/025015WOS:000314180900016Acesso restrito2-s2.0-8487332959608963481657081402305581567093057