Study of compressive type accelerometer based on lead-free BNKBT piezoceramics |
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| Authors: | SH Choy XX Wang HLW Chan CL Choy |
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| Institution: | (1) Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong, P.R. China |
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| 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.
PACS 77.22.Ej; 77.84.-s; 85.50.-n |
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