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 (d 33) coefficients were measured. A 50/50 vol.% PZT/PVDF-HFP composite resulted in piezo and pyroelectric coefficients of d 33 = 25.0 pC/N and p = 4.5 × 10-4 C/m 2 K 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.
CITATION STYLE
Malmonge, L. F., Malmonge, J. A., & Sakamoto, W. K. (2003). Study of pyroelectric activity of PZT/PVDF-HFP composite. Materials Research, 6(4), 469–473. https://doi.org/10.1590/s1516-14392003000400007
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