Shear piezoelectric properties of vinylidene fluoride trifluoroethylene copolymer, and its application to transverse ultrasonic transducers
- 24 April 1995
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 66 (17) , 2215-2217
- https://doi.org/10.1063/1.113171
Abstract
Shear piezoelectric properties of a vinylidene fluoride trifluoroethylene copolymer [P(VDF/TrFE)] have been studied in a temperature range from 10 to 350 K. The shear electromechanical coupling factors k15 and k24 at 290 K are found to be 0.19 and 0.20, respectively, the values being largest among the piezoelectric polymers known at present. The factors k15 and k24 remain constant below 200 K, while k24 increases and k15 decreases above 200 K. The effectiveness of P(VDF/TrFE) as a transverse ultrasonic transducer material was demonstrated by measurements of transverse sound velocities and absorptions in aluminum and poly(methyl methacrylate) with P(VDF/TrFE) shear transducers.Keywords
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