RESPONSE OF A 1-3 PIEZOELECTRIC COMPOSITE TRANSDUCER FOR ELASTIC WAVES GENERATED DURING GLASS CAPILLARY BREAKAGE

Abstract

The 1-3 piezoelectric composite transducer with the 60% volume fraction of the PZT-5A was fabricated by the dicing-filling method. The electrical and acoustical characteristics of the 1-3 piezoelectric composite transducer were compared and analyzed by the electrical impedance measurements and the pulse-echo method. The mechanical quality coefficient (Q) and the resonant frequency were 18.5 and 1.6 MHz, respectively. The elastic waves generated during glass capillary breakage were observed by 1-3 piezoelectric composite transducer. The observed AE signals are well matched with the perpendicular component of the particle velocity calculated by computer. The observed AE signal and its frequency spectrum show that the pulse-type signals of AE observed by 1-3 piezoelectric composite transducer may be depend on the the vibration mode of thickness with the plate response of the wide band.