Title :
Lead-free piezoelectric-metal-cavity (PMC) actuators
Author :
Lam, Kwok-Ho ; Lin, Dun-Min ; Kwok, Kin-Wing ; Chan, Helen Lai-Wa
Author_Institution :
Dept. of Appl. Phys. & Mater. Res. Centre, Hong Kong Polytech. Univ., Kowloon
fDate :
8/1/2008 12:00:00 AM
Abstract :
A piezoelectric piezoelectric-metal-cavity (PMC) actuator was reported previously that can exhibit a large flexural displacement. In this paper, a lead-free piezoelectric ceramic was used as a driving element of the PMC actuator. Bi0.5(Na0.725K0.175Li0.1)0.5TiO3 (abbreviated as BNKLT) is a soft-type piezoelectric ceramic with good piezoelectric properties at room temperature. Both the electrical and mechanical properties of the BNKLT PMC actuator were measured. With good piezoelectric coefficients and low density, the BNKLT ceramic has the potential to be used as the driving element of the lead-free actuator.
Keywords :
bismuth compounds; lithium compounds; piezoceramics; piezoelectric actuators; piezoelectricity; potassium compounds; sodium compounds; Bi0.5(Na0.725K0.175Li0.1)0.5TiO3; PMC actuator; driving element; electrical properties; flexural displacement; lead-free piezoelectric ceramics; lead-free piezoelectric-metal-cavity actuators; mechanical properties; piezoelectric coefficients; piezoelectric properties; temperature 293 K to 298 K; Ceramics; Electric variables measurement; Environmentally friendly manufacturing techniques; Lead; Mechanical factors; Mechanical variables measurement; Piezoelectric actuators; Piezoelectric materials; Piezoelectric polarization; Temperature; Acoustics; Ceramics; Computer Simulation; Computer-Aided Design; Electronics; Equipment Design; Equipment Failure Analysis; Lead; Models, Theoretical; Scattering, Radiation; Transducers; Vibration;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2008.853
