Challenges and New Trends for Piezoelectric ActuatorsBiScO3-PbTiO3 ceramics with TC greater than 400 C has been successfully processed. Despite the increase in TC, excess Pb addition increases both the bulk conductivity and the grain boundary contribution to conductivity at elevated temperatures. Conductivity at elevated temperatures, that limits the operating temperature for actuators, has been greatly reduced by excess Bi additions. Excess Bi doping improves poling conditions resulting in enhanced piezoelectric coefficient (d(sub 33) = 408 pC/N).
Document ID
20090005241
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Sehirlioglu, Alp (NASA Glenn Research Center Cleveland, OH, United States)