Accession Number : ADA311064

Title :   Piezoceramic-Polymer Composites for Underwater Transducer Applications,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC MATERIAL SCIENCE AND TECHNOLOGY DIV

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

PDF Url : ADA311064

Report Date : 28 JUN 1996

Pagination or Media Count : 29

Abstract : Lead zirconate titanate (PZT) ceramics have been used for underwater transducers. However, single phase PZT ceramic has limited hydrostatic performance due to the low hydrostatic piezoelectric charge and voltage coefficients, dh and gh, respectively. Although PZT with large piezoelectric charge coefficients d33 and d31, has been developed, the dh is still low because dh is equal to d33 + 2d31 where d33 is opposite in sign to d31 and has a magnitude only slightly higher than twice the magnitude of d31. The gh (= dh / epsilon) value is also small because the permittivity epsilon is high for monolithic PZT.

Descriptors :   *CERAMIC MATRIX COMPOSITES, *ELECTROACOUSTIC TRANSDUCERS, POLYMERS, DIELECTRIC PROPERTIES, COEFFICIENTS, LEAD TITANATES, HYDROSTATICS, SONAR TRANSDUCERS, ZIRCONATES.

Subject Categories : Acoustic Detection and Detectors
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE