Study of compressive type accelerometer based on lead-free BNKBT piezoceramics.

Authors :: Choy, S. H.
Wang, X. X.
Chan, H. L. W.
Choy, C. L.
Source :: Applied Physics A: Materials Science & Processing. Mar2006, Vol. 82 Issue 4, p715-718. 4p. 1 Black and White Photograph, 2 Diagrams, 1 Chart, 3 Graphs.
Publication Year :: 2006
Abstract: Lead-free piezoelectric 0.90(Bi1/2Na1/2)TiO3-0.05(Bi1/2K1/2)TiO3-0.05BaTiO3 ceramics(abbreviated as BNKBT-5) rings were fabricated using a conventional mixed oxide method. The ceramics have a piezoelectric constant d33=168 pC/N, electromechanical coupling factors kp=0.313 and kt=0.487. The BNKBT lead-free ceramic rings were used as the transduction elements in a compressive type accelerometer and its performance compared with a lead zirconate titanate (PZT) APC 840 ceramic accelerometer with similar structure. The lead-free accelerometer shows good performance and has a broader frequency response compared to the lead-based PZT accelerometer. [ABSTRACT FROM AUTHOR]