STRESS ISOLATION PZT-AIR COMPOSITES

Authors
  1. Sherrit, S.
  2. Wiederick, H.D.
  3. Mukherjee, B.K.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Royal Military Coll of Canada, Kingston ONT (CAN)
Abstract
We describe a new piezoelectric hydrophone material, a 1-3 type Lead Zirconate Titanate (PZT) - Air composite which is constructed in such a way that the PZT rods are isolated from stresses in the 1 and 2 directions. The theory for these new composites predicts a hydrophone figure of merit that is substantially greater than that of PZT. Measurements on the composites give values of the hydrostatic voltage coefficient of up to 235 x 10E-3 Vm/N and figures of merit of the order of 41,000 x 10E-15 square m/N at a pressure of 2 MPa. However the hydrostatic coefficients show a substantial pressure dependence and hysteresis which is attributed to the stress amplification in the PZT rods.
Report Number
DREA-CR-92-410 — Contractor Report
Date of publication
15 Oct 1991
Number of Pages
20
DSTKIM No
92-01534
CANDIS No
104424
Format(s):
Hardcopy;Originator's fiche received by DSIS

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