Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 3, Pages 3301-3306Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.10.018
Keywords
Piezoelectric ceramic; Bismuth layered ferroelectrics; Lead zirconate titanate piezoelectric; Material property
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The material properties of bismuth layer-structured ferroelectrics (BLSFs) and lead zirconate titanate (PZT) piezoelectric ceramics have been investigated. The fatigue strength of the PZT sample was higher than that of the BLSF. The electrical properties were altered as a result of cyclic loading. The piezoelectric constant (d(33)) and electromechanical coupling coefficient (k(33)) decreased with increasing applied load for both piezoelectric ceramics. However, the rate of reduction for the BLSF sample is smaller than that for the PZT ceramic. This different rate is attributed to the different material characteristics. During cyclic loading, the strain value increased with increasing cycle number for the PZT sample. Like the PZT ceramic, the strain value increases for the BLSF but the back strain occurred after the cyclic loading was conducted for certain period of times. This different strain behavior is influenced by the different domain switching characteristics and this was clarified from the respective strain-electric field relationships. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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