EVALUATION OF A P(VDF-TrFE) COPOLYMER WITH FLEXIBLE ELECTRODES MANUFACTURED BY AMP SENSORS LTD

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Authors
  1. Haysom, J.E.
  2. Sherrit, S.
  3. Wiederick, H.D.
  4. Mukherjee, B.K.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Royal Military Coll of Canada, Kingston ONT (CAN)
Abstract
The ferroelectric copolymer poly(vinylidene difluoride- trifluoroethylene) shows considerable promise as a transducer material for sonar transducers. This material has a low density, is flexable and has a hydrostatic figure of merit which can be an order of magnitude better than that of the lead zirconate titanate which is currently the most commonly used transducer material. We have investigated a 0.500 mm thick copyolymer with thin flexible aluminium coated nickel electrodes manufactured by AMP Sensors Ltd of the USA. We have determined the elastic, dielectric, piezoelectric and hydrostatic properties of the copolymer with the flexible electrodes. The hydrostatic voltage coefficient and the hydrostatic figue of merit of this copolymer sample are at least five times better than those of lead zirconate titanate but they are not as good as values for the same copolymer with stiff electrodes which were investigated earlier. These properties have a small dependence on pressure and in this regard the present material is better than other polymers studies earlier.
Report Number
DREA-CR-93-482 — Contractor Report
Date of publication
01 Jan 1994
Number of Pages
13
DSTKIM No
94-02969
CANDIS No
142296
Format(s):
Hardcopy;Document Image stored on Optical Disk;Originator's fiche received by DSIS

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