Study of pyroelectric activity of PZT/PVDF-HFP composite

AUTOR(ES)

Malmonge, Luiz Francisco, Malmonge, José Antonio, Sakamoto, Walter Katsumi

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2003-12

RESUMO

Flexible, free-standing piezo and pyroelectric composite with 0 to 3 connectivity was made up from Lead Zirconate Titanate (PZT) powder and poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) copolymer. The pyroelectric and the piezoelectric longitudinal (d33) coefficients were measured. A 50/50 vol.% PZT/PVDF-HFP composite resulted in piezo and pyroelectric coefficients of d33 = 25.0 pC/N and p = 4.5 × 10-4 C/m²K at 70 °C, respectively. Analysis of the complex permittivity in a wide range of frequency was carried out indicating lower permittivity of the composite in comparison with a permittivity of the PZT ceramic. The low value of the permittivity gives a high pyroelectric figure of merit indicating that this material can be used to build a temperature sensor in spite of the lower pyroelectric coefficient compared with PZT.

Documentos Relacionados

• Electrochemical studies on inert filler incorporated poly (vinylidene fluoride - hexafluoropropylene) (PVDF - HFP) composite electrolytes
• Pyroelectric composite film for X-ray intensity detection
• Estudo morfológico do PVDF e de blendas PVDF/P(VDF-TrFE).
• Study of Structural and Electric Properties of the PZT 52/48 Doped With Er+3
• Novo triodo corona e sua aplicação no estudo das propriedades elétricas do polímero pvdf.