Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7869
Title: Electron-irradiated electrostrictive P(VDF-TrFE) copolymer transducers
Authors: Guo, SS
Li, WP
Li, K
Chan, HLW 
Zhao, XZ
Choy, CL 
Keywords: Electron-irradiation
Electrostriction
P(VDF-TrFE)
Ultrasonic transducer
Issue Date: 2004
Publisher: Elsevier
Source: Sensors and actuators. A, Physical, 2004, v. 112, no. 1, p. 134-141 How to cite?
Journal: Sensors and actuators. A, Physical 
Abstract: Ultrasonic transducers were fabricated using electron-irradiated electrostrictive poly(vinylidene fluoride-trifluoroethylene) [P(VDF 0.8-TrFE0.2)] copolymers. The transducers were tested in through-transmission mode by a piezoelectric P(VDF0.7-TrFE 0.3) receiver in the MHz range. Different dc voltage biased transmitting response was recorded when the transmitter was driven by a standard ultrasonic voltage source through a decoupling circuit. The amplitudes of voltage waveforms increased with the dc bias voltage from 0 to ±1000V and symmetric waveforms were observed for positive and negative field. The frequency spectrum were obtained by fast Fourier transformation (FFT) method with similar center frequencies and -6dB bandwidths compared with a normal copolymer transmitter. The electron irradiation seems to be responsible for the difference of peak frequencies and waveforms in the measurement results. The inversed voltage waveforms were also given by a graphic explanation. It is believed that the "induced" piezoelectric coefficient increased with the dc biased field, which may be the reason for the ultrasound generation of the transmitter.
URI: http://hdl.handle.net/10397/7869
ISSN: 0924-4247
EISSN: 1873-3069
DOI: 10.1016/j.sna.2003.10.030
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