Title :
Evaluation of piezoelctric materials for cryogenic ultrasonic motor
Author :
Yamaguchi, Daisuke ; Kanda, Takefumi ; Suzumori, Koichi
Author_Institution :
Grad. Sch. of Natural Sci. & Technol., Okayama Univ., Okayama, Japan
Abstract :
This paper presents a fabrication and evaluation of an ultrasonic motor which can drive in an ultralow temperature environment. A piezoelectric performance of ferroelectric materials was evaluated at ultralow temperature. To measure the piezoelectric constant d31 of PMN-PT and PZT at ultralow temperature, the resonance-antiresonance method was applied. The d31 of the PMN-PT was higher than that of PZT at 4.5 K. Additionally, we have fabricated and evaluated an ultrasonic motor that have a bolt-clamped Langevin-type transducer. The performance of the transducer and the efficiency of the motor had similar decreasing tendency with driving temperature.
Keywords :
cryogenics; ferroelectric materials; lead compounds; piezoelectric materials; ultrasonic motors; PMN-PT; PZT; bolt-clamped Langevin-type transducer; cryogenic ultrasonic motor; ferroelectric materials; piezoelectric constant; piezoelectric materials; piezoelectric performance; resonance-antiresonance method; temperature 4.5 K; ultralow temperature environment; Acoustics; Admittance; Rotors; Temperature measurement; Torque; Transducers; Ultrasonic variables measurement; Actuator; Piezoelctric transducer; Ultralow temperature; Ultrasonic motor;
Conference_Titel :
Ultrasonics Symposium (IUS), 2013 IEEE International
Conference_Location :
Prague
Print_ISBN :
978-1-4673-5684-8
DOI :
10.1109/ULTSYM.2013.0053
