Abstract.
Large piezoelectric d33 coefficients around 600 pC/N are found in corona-charged non-uniform electrets consisting of elastically “soft” (microporous polytetrafluoroethylene PTFE) and “stiff” (perfluorinated cyclobutene PFCB) polymer layers. The piezoelectric activity of the two-layer fluoropolymer stack exceeds the d33 coefficient of the ferroelectric ceramic lead zirconate titanate (PZT) by more than a factor of two and that of the ferroelectric polymer polyvinylidene fluoride (PVDF) by a factor of 20. Soft piezoelectric materials may become interesting for a large number of sensor and transducer applications, in areas such as security systems, medical diagnostics, and nondestructive testing.
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Accepted: 9 November 1999 / Published online: 3 December 1999
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Neugschwandtner, G., Schwödiauer, R., Bauer-Gogonea, S. et al. Large piezoelectric effects in charged, heterogeneous fluoropolymer electrets . Appl Phys A 70, 1–4 (2000). https://doi.org/10.1007/PL00006965
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DOI: https://doi.org/10.1007/PL00006965