(1-x)Bi0.5Na0.5TiO3-xBaTiO(3) lead-free piezoelectric ceramics for energy-harvesting applications
- Authors
- Kang, Woo-Seok; Koh, Jung-Hyuk
- Issue Date
- Jul-2015
- Publisher
- ELSEVIER SCI LTD
- Keywords
- BNT-BT; Lead free; Energy harvesting
- Citation
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.35, no.7, pp 2057 - 2064
- Pages
- 8
- Journal Title
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
- Volume
- 35
- Number
- 7
- Start Page
- 2057
- End Page
- 2064
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/9360
- DOI
- 10.1016/j.jeurceramsoc.2014.12.036
- ISSN
- 0955-2219
1873-619X
- Abstract
- Lead-free (1 - x)Bi0.5Na0.5TiO3-xBaTiO(3) piezoelectric ceramics were investigated for energy-harvesting applications. In order to enhance the piezoelectric properties, the BaTiO3 content was varied at 0 <= x <= 0.1. Furthermore, the sintering temperature was optimized to enhance the piezoelectric properties and output energies. The piezoelectric charge coefficient was enhanced from 70 to 164 pC/N by introducing BaTiO3 and optimizing the sintering temperature to 1175 degrees C. The (1 - x)Bi0.5Na0.5TiO3-xBaTiO(3) lead-free piezoelectric ceramics exhibited a piezoelectric voltage coefficient of 47.03 x 10(-3) V m/N at x=0.04, which is slightly higher than the piezoelectric voltage coefficient of lead-based piezoelectric ceramics. The generated output voltage and output power were 8.95 V and 18 nW, respectively, for 0.94Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3) ceramics sintered at 1175 degrees C. The results suggest that lead-free (1 -x)Bi0.5Na0.5TiO3-xBaTiO(3) piezoelectric ceramics are good candidates for energy-harvesting applications. (C) 2015 Elsevier Ltd. All rights reserved.
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