Title :
Ceramic-metal composite actuator
Author :
Xu, Q.C. ; Dogan, A. ; Tressler, J. ; Yoshikawa, S. ; Newnham, R.E.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The main objective of this work was to develop a new type of actuator. It consists of a piezoelectric ceramic disk or multilayer stack and two metal end plates with a crescent-shaped cavity on the inner surface. The plates are used as mechanical transformers for converting and amplifying the lateral displacement of the ceramic into a large axial motion in the plates. Both d31 and d33 contribute to the axial displacement. Sizable strains were obtained with both PZT-metal and PMN-metal actuators. Displacement amplification principle, fabrication, and measurement results are presented
Keywords :
ceramics; lead compounds; piezoelectric actuators; PMN; PZT; PbMgO3NbO3; PbZrO3TiO3; ceramic-metal composite actuators; crescent-shaped cavity; displacement amplification; flextensional transducer; mechanical transformers; metal end plates; multilayer stack; piezoelectric ceramic disk; Capacitive sensors; Ceramics; Displacement measurement; Electrostriction; Fabrication; Laboratories; Nonhomogeneous media; Piezoelectric actuators; Transformers; Voltage;
Conference_Titel :
Ultrasonics Symposium, 1991. Proceedings., IEEE 1991
Conference_Location :
Orlando, FL
DOI :
10.1109/ULTSYM.1991.234248
