Title :
PMN-PT transducer: high stress measurements at resonance
Author :
Pham-Thi, M. ; Gaucher, P. ; Lacour, O. ; Vanderborck, G.
Author_Institution :
Lab. Central de Recherches, THALES, Orsay, France
Abstract :
High power piezoelectric devices are driven under high electric signal. To characterize the material in conditions close to their use in high acoustic power emission, we need to reach high strain or high strain velocity. This can be achieved only at resonance where the mechanical Qm factor amplifies the field-induced strain (by a factor of Qm). An experimental method is proposed to measure the strain of piezoceramic at resonance. The results measured on piezoelectric relaxor ceramic materials are compared with the performances obtained in Barrel Stave transducers
Keywords :
Q-factor; dielectric hysteresis; lead compounds; piezoceramics; piezoelectric transducers; resonance; stress measurement; ultrasonic transducers; Barrel Stave transducers; PMN-PT transducer; Pb(Mg1/3Nb2/3)3-PbTiO3 ; PbMgO3NbO3-PbTiO3; field-induced strain; high acoustic power emission; high electric signal; high power piezoelectric devices; high strain; high strain velocity; high stress measurements; mechanical Qm factor; piezoceramic; piezoelectric relaxor ceramic materials; resonance; Acoustic materials; Acoustic measurements; Acoustic transducers; Capacitive sensors; Piezoelectric devices; Piezoelectric materials; Piezoelectric transducers; Resonance; Strain measurement; Stress measurement;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.991908
