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|Title:||PT/P(VDF-TrFE) hydrophone array|
|Authors:||Lau, Sien Ting|
Chan, Helen L. W.
|Source:||2001 IEEE Hong Kong Electron Devices Meeting : proceedings : 30 June, 2001, The Hong Kong Polytechnic University, p. 71-74.|
|Abstract:||0-3 composite thin films of lead titanate (PT) in poly(vinylidene fluoride-trifluoroethylene) (PT/P(VDF-TrFE)) have been prepared by the spin-coating method. The piezoelectric coefficients of PT and P(VDF-TrFE) have opposite signs, while their pyroelectric coefficients have the same sign. The two phases of the composite film are then poled in opposite directions to prepare a piezoelectric film with vanishing pyroelectric response. An 8-element hydrophone array with this composite film as the sensing elements have been fabricated and characterized. The array has good receiving sensitivity over several MHz. The angular responses of the array elements are measured and the results are compared to a theoretical model. The acoustical and electrical crosscoupling between the array elements are also discussed.|
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|Appears in Collections:||MRC Conference Papers & Presentations|
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