Lead zirconate titanate/polyurethane (PZT/PU) composite for acoustic emission sensors
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Data
2001-01-01
Autores
Sakamoto, W. K. [UNESP]
Marin-Franch, P. [UNESP]
Tunnicliffe, D. [UNESP]
Das-Gupta, D. K. [UNESP]
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Resumo
Piezoelectric composite, made from ferroelectric ceramic lead zirconate titanate (PZT) and vegetable based polyurethane (PU) polymer, was doped with a semiconductor filler, graphite. The resulting composite (PZT/C/PU) with 49/1/50- vol. % composition could be poled at lower field and shorter time due to the increased conductivity of the polymer phase following the introduction of graphite. The PZT/C/PU composite showed higher pyroelectric coefficient in comparison with the undoped PZT/PU composite with 50/50-vol. % composition. Also, the PZT/C/PU composite has shown the ability to detect both extensional and flexural modes of simulated acoustic emission (AE) at a distance up to 8.0 m from the source, thus indicating that it may be used for detection of structural damages.
Descrição
Palavras-chave
Acoustic emissions, Composite materials, Electric conductivity, Ferroelectric ceramics, Graphite, Polyurethanes, Semiconductor doping, Sensors, Pyroelectric coefficients, Piezoelectric materials
Como citar
Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report, p. 20-23.