Actuation Behavior of Multilayer Ceramic Actuator Induced by Electro-Mechanical Loading

The actuation behavior of multilayer ceramic actuators (MCA) using PMN-PZT ceramics was investigated under the combined high electromechanical loading. When electric field and compressive stress are simultaneously applied to the ceramics, the piezoceramics is expected to be different from that of ceramics induced by only one quantity, electric field or mechanical load. This property difference was estimated via piezoelectric equation.

Keywords:

• Multilayer ceramic actuator (MCA)
• non-linear piezoelectricity
• mechanical load
• piezoelectric coefficient d ₃₃
• dielectric permittivity

Acknowledgments

This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea.

Paper originally presented at AMF-4, Bangalore, India, December 12–15, 2003; received in final form April 10, 2005. The original Proceedings of the Fourth Asian Meeting on Ferroelectricity (AMF-4) are published in seven earlier volumes of FERROELECTRICS (Volumes 323–329, inclusive).