Low Electrical Field Characteristics of Piezoelectric Ceramic Rings, Part II.
NAVAL RESEARCH LAB WASHINGTON D C
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Low electrical field parameters of Type I piezoelectric ceramic rings purchased from four major suppliers of sonar ceramic elements were measured to determine the applicability and value of MIL-STD-1376SHIPS, Piezoelectric Ceramic for Sonar Transducers. Data are also presented on two recently developed low-aging compositions. Measured values of the relative dielectric constant, loss tangent, electromechanical coupling factor, frequency constant, mechanical Q sub m, elastic compliance coefficient, and piezoelectric constants at low electrical fields and as functions of temperature 0 to 50C and aging are presented. The samples of Type I ceramic showed some improvement toward satisfying all the specifications of MIL-STD-1376SHIPS over those previously measured. The low-aging compositions are characterized as a function of temperature and are shown to be similar to the Type I composition.
- Ceramics, Refractories and Glass
- Acoustic Detection and Detectors