Dielectric, electric, and piezoelectric properties of three-phase piezoelectric composite based on castor-oil polyurethane, lead zirconate titanate particles and multiwall carbon nanotubes

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal da Paraíba (UFPB)-
Autor(es): dc.creatorFreire Filho, Fernando C. M.-
Autor(es): dc.creatorSantos, Josiane A.-
Autor(es): dc.creatorSanches, Alex O.-
Autor(es): dc.creatorMedeiros, Eliton S.-
Autor(es): dc.creatorMalmonge, José A.-
Autor(es): dc.creatorSilva, Michael J.-
Data de aceite: dc.date.accessioned2025-08-21T21:54:50Z-
Data de disponibilização: dc.date.available2025-08-21T21:54:50Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-03-05-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/app.53572-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246602-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246602-
Descrição: dc.descriptionThe effects of multiwall carbon nanotubes (MWCNTs) on the electrical, dielectric, and piezoelectric properties of the ferroelectric ceramic/castor-oil polyurethane (PUR) composite films were evaluated. The three-phase piezoelectric composites were produced by keeping PUR concentration constant while varying lead zirconate titanate (PZT) volume fractions between 10 and 50 vol.%, at two MWCNT concentrations: above and below percolation threshold. The dc electrical conductivity analysis revealed that small amounts of MWCNTs dispersed within PUR/PZT composite films can significantly improve electrical and piezoelectric properties due to their ability to act as conductive bridges between PZT particles in the samples. Using Jonscher's power law, it was possible to determine that the electrical conduction in ac regime occurs through spatial charge hopping between states located within the piezoelectric composite. Analyzing the piezoelectric properties through the d33 coefficient, it was found that PUR-MWCNT/PZT piezoelectric composite displayed higher d33 values (20 pC/N) in comparison to the PUR/PZT two-phase composite (9.5 pC/N) for all PZT loadings. According to these results, the dispersion of MWCNT nanoparticles influences the poling effectiveness of the PZT particles and increases the d33 coefficient of three-phase piezoelectric composites.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionFaculdade de Engenharia Universidade Estadual Paulista (UNESP)-
Descrição: dc.descriptionLaboratory of Materials and Biosystems (LAMAB) Universidade Federal da Paraíba (UFPB) Departamento de Engenharia de Materiais-
Descrição: dc.descriptionFaculdade de Engenharia e Ciência Universidade Estadual Paulista (UNESP)-
Descrição: dc.descriptionFaculdade de Engenharia Universidade Estadual Paulista (UNESP)-
Descrição: dc.descriptionFaculdade de Engenharia e Ciência Universidade Estadual Paulista (UNESP)-
Descrição: dc.descriptionFAPESP: 2017/19809-5-
Idioma: dc.languageen-
Relação: dc.relationJournal of Applied Polymer Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcastor-oil polyurethane-
Palavras-chave: dc.subjectcomposite-
Palavras-chave: dc.subjectlead zirconate titanate-
Palavras-chave: dc.subjectmultiwalled carbon nanotubes-
Palavras-chave: dc.subjectpiezoelectricity-
Título: dc.titleDielectric, electric, and piezoelectric properties of three-phase piezoelectric composite based on castor-oil polyurethane, lead zirconate titanate particles and multiwall carbon nanotubes-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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