Title :
Lead zirconate titanate/polyurethane (PZT/PU) composite for acoustic emission sensors
Author :
Sakamoto, W.K. ; Marin-Franch, P. ; Tunnicliffe, D. ; Das-Gupta, D.K.
Author_Institution :
Univ. Estadual Paulista, Sao Paulo, Brazil
Abstract :
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
Keywords :
acoustic emission; acoustoelectric transducers; dielectric polarisation; elemental semiconductors; ferroelectric ceramics; filled polymers; graphite; lead compounds; piezoelectric materials; piezoelectric transducers; pyroelectricity; 8.0 m; PZT-C; PZT/C/PU composite; PbZrO3TiO3-C; acoustic emission; acoustic emission sensors; conductivity; extensional modes; ferroelectric ceramic; flexural modes; graphite; lead zirconate titanate/polyurethane composite; piezoelectric composite; pyroelectric coefficient; semiconductor filler; structural damage; vegetable based polyurethane polymer; Acoustic emission; Acoustic sensors; Acoustic signal detection; Ceramics; Ferroelectric materials; Lead compounds; Mechanical sensors; Polymers; Pyroelectricity; Titanium compounds;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963479
