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Title: Effect of dielectric relaxation on the performance of P(VDF-TrFE) copolymer ultrasonic transducers
Authors: Kwok, Kin-wing
Chan, Helen L. W.
Choy, Chung-loong
Subjects: Copolymers
Dielectric relaxation
Issue Date: 1998
Publisher: IEEE
Source: ISAF 1998 : proceedings of the eleventh IEEE International Symposium on Applications of Ferroelectrics, Montreux, Switzerland, August 24-27, 1998, p. 243-246.
Abstract: The complex dielectric permittivity of vinylidene fluoride-trifluoroethylene copolymer with 20 mol% of TrFE [P(VDF-TrFE) 80/20] has been measured over the frequency range of 500 kHz to 20 MHz at temperatures varying from 20° to 100 °C. This copolymer has the highest electromechanical coupling coefficient k[sub t] among all TrFE compositions and has thus attracted considerable interest in ultrasonic transducer applications. The effect of dielectric relaxation on the performance of VDF-TrFE transducers is discussed.
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Type: Conference Paper
ISBN: 0-7803-4959-8
Appears in Collections:MRC Conference Papers & Presentations
AP Conference Papers & Presentations

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