Title :
Tunable transducers as smart materials
Author :
Blaszkiewicz, M. ; Newnham, R.E. ; Xu, Q.C.
Author_Institution :
Pennsylvania State Univ., University Park, PA, USA
Abstract :
A solid-state tunable transducer has been developed by incorporating an elastically nonlinear material, silicone rubber, into an electroacoustic transducer made from piezoelectric ceramics. The resonant frequency and mechanical Q of the transducer are tuned mechanically by applying a uniaxial compressive stress to the composite. The resonant frequency is tuned electrically by placing a piezoelectric actuator into the composite and varying the magnitude of the DC bias.<>
Keywords :
acoustoelectric transducers; piezoelectric materials; piezoelectric transducers; rubber; tuning; DC bias; elastically nonlinear material; electroacoustic transducer; mechanical Q; piezoelectric actuator; piezoelectric ceramics; resonant frequency; silicone rubber; smart materials; solid-state tunable transducer; uniaxial compressive stress; Acoustic transducers; Capacitive sensors; Ceramics; Electric resistance; Intelligent sensors; Piezoelectric materials; Piezoelectric transducers; Resonant frequency; Thermistors; Varistors;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.149032
