Fabrication and Evaluation of PZT/Ag Piezoelectric Composites and Graded Actuator
Homogeneous PZT/Ag composites and compositionally graded PZT/Ag actuators were fabricated and evaluated in this work. The piezoelectric constant decreases gradually and the dielectric constant increases significantly with an increase in silver content of the PZT/Ag composites. The fracture toughness of the PZT/Ag composites is enhanced with addition of the silver powders. Based on the corresponding piezoelectric properties of the monolithic PZT/Ag composites, a graded material with symmetric silver compositions from 1 to 10 vol % then inversely to 1 vol % was successfully fabricated by conventional sintering. This study indicates that the PZT/Ag composites can be used to acting as bimorph actuator materials.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
H. L. Zhang and J. F. Li, "Fabrication and Evaluation of PZT/Ag Piezoelectric Composites and Graded Actuator", Key Engineering Materials, Vols. 280-283, pp. 1913-1916, 2005