Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 13, Pages 3457-3466Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.05.001
Keywords
Lead-free; Piezoelectric properties; Strain response; Tolerance factor; (Bi0.5Na0.5)TiO3
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Funding
- National Natural Science Foundation of China [51372171, 51332003]
- Shanghai Municipal Natural Science Foundation [12ZR1434600]
- University of Macau
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The structure of end-member Bi(Ni0.5Ti0.5)O-3 was calculated by first-principles method and solid solution of the (1 - x)BNT-xBi(Ni0.5Ti0.5)O-3 ((1 - x)BNT-xBNiT) system was prepared using solid state reaction. Effect of BNiT addition to BNT ceramics on the phase structure, strain behavior, dielectric, ferroelectric, and piezoelectric properties was systematically investigated. The phase diagram was obtained and the relationship between the phase structure and electromechanical properties has been clarified. In comparison to other systems, results in this study indicated a relationship between the morphotropic phase boundary (MPB) composition and tolerance factor and the calculated tetragonality of the end-member Bi(Me'Me-0.5 ''(0.5))O-3, and the t value corresponding to the formation of MPB located in a quite narrow range of 0.975-0.976 in the (1 - x)BNT-xBi(Me'Me-0.5 ''(0.5))O-3 systems with low tolerance factor end-members. Thus, this work do not only supplement for BNT-based piezoceramics, but also provide a guideline to predict the approximate MPB region quickly for designing new lead-free piezoelectric ceramics. (C) 2015 Elsevier Ltd. All rights reserved.
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