Accession Number : ADA310873

Title :   Piezoceramic-Polymer Composites for Underwater Transducer Applications.

Descriptive Note : Final rept. 1 Oct 93-30 Sep 94,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Kim, C. ; Kahn, M. ; Lewis, D., III

PDF Url : ADA310873

Report Date : 28 JUN 1996

Pagination or Media Count : 30

Abstract : A piezocomposite structure was prepared in a 1-1-3 configuration by casting a compressible epoxy between lead zirconate titanate (PZT) rods and a stiff polymer preform matrix. A corrugated polymer perform was used to provide structural stability under high hydrostatic pressures. The changes of piezoelectric properties with pressure and temperature were very small. To enhance the piezoelectric responsivity, the 1-1-3 composite is further modified to have PZT rods extended beyond the epoxy matrix. The pressure applied to the cover plate is then transferred only to PZT rods and the pressure on the PZT rods is amplified by the reciprocal of the PZT volume fraction of the composite. As a result, a figure of merit can be achieved to more than 10,000 x 10(exp -15) (sq m/N).

Descriptors :   *POLYMERS, *COMPOSITE MATERIALS, *CERAMIC MATERIALS, *PIEZOELECTRIC MATERIALS, *TRANSDUCERS, *UNDERWATER, STABILITY, STRUCTURAL PROPERTIES, HIGH PRESSURE, MATRIX MATERIALS, LEAD TITANATES, RODS, EPOXY COMPOSITES, FIGURE OF MERIT, ZIRCONATES, HYDROSTATIC PRESSURE.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Electrical and Electronic Equipment
      Ceramics, Refractories and Glass
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE