Accession Number : ADD017998

Title :   Unitary Transducer with Variable Resistivity.

Descriptive Note : Patent, Filed 29 Aug 94, patented 26 Mar 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kahn, Manfred ; Wu, Carl C ; Zain, Saadi

Report Date : 26 Mar 1996

Pagination or Media Count : 6

Abstract : An actuator including a unitary ceramic element capable of bending in response to an applied voltage. The ceramic has a first region of lower resistivity in contact with a second region of higher resistivity. There is no seam where said regions contact each other The first region contains an additive in an amount needed to reduce resistivity thereof relative to said second region. The second region is devoid of additive or contains a different additive that raises resistivity thereof or contains the same additive in a different amount than in the first region.

Descriptors :   *PIEZOELECTRIC MATERIALS, *SONAR TRANSDUCERS, *PATENTS, ELECTRICAL RESISTANCE, ACTUATORS, CERAMIC BODIES

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE