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

fYear

2001

fDate

2001

Firstpage

20

Lastpage

23

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on

Conference_Location

Kitchener, Ont.

Print_ISBN

0-7803-7053-8

Type

conf

DOI

10.1109/CEIDP.2001.963479

Filename

963479