期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 48, 期 47, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/48/47/472001
关键词
lead-free; ferroelectrics; field induced strain; fatigue
资金
- National Natural Science Foundation of China [51402144, 51372110, 51302124]
- Project of Shandong Province Higher Educational Science and Technology Program [J14LA11, J14LA10]
- National High Technology Research and Development Program of China [2013AA030801]
- Science and Technology Planning Project of Guangdong Province, China [2013B091000001]
- Independent innovation and achievement transformation in Shandong Province special, China [2014CGZH0904]
- Natural Science Foundation of Shandong Province of China [ZR2014JL030]
- Research Foundation of Liaocheng University [318051407, 318011301, 318011306]
In this letter, we report a lead-free piezoelectric ceramic system (Bi0.5Na0.5)(1) xBaxTi0.98 (Fe0.5Sb0.5)(0.02)O-3 which shows a surprisingly high field-induced nonlinear strain of 0.57% comparable to those obtained in Pb-based antiferroelectrics. The ultrahigh strain response of the composition stems from the composition proximity to the ferroelectric-nonpolar phase boundary, which leads to reversible transformation between a nonpolar phase and a polar ferroelectric phase under cyclic fields. In particular, this material is very attractive for its exceptionally good fatigue resistance (up to 10(6) cycles) and high temperature stability (25-100 degrees C) due to its stable nonpolar phase and lower defect density. These findings render the current material a great opportunity for novel applications in ultra-large stroke and nonlinear actuators demanding improved cycling and thermal reliabilities.
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