Improved Li and Sb doped lead-free (Na,K)NbO3 piezoelectric ceramics for energy harvesting applications
- Authors
- Kim, J.; Ji, J.-H.; Shin, D.-J.; Koh, J.-H.
- Issue Date
- Dec-2018
- Publisher
- Elsevier Ltd
- Keywords
- NKN-LS; Piezoelectric properties; Lead-free; Energy harvesting
- Citation
- Ceramics International, v.44, no.18, pp 22219 - 22224
- Pages
- 6
- Journal Title
- Ceramics International
- Volume
- 44
- Number
- 18
- Start Page
- 22219
- End Page
- 22224
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3466
- DOI
- 10.1016/j.ceramint.2018.08.341
- ISSN
- 0272-8842
1873-3956
- Abstract
- Piezoelectric energy harvesting is the most widely investigated technology for renewable energy applications. In this work, (1-x)(Na0.5K0.5)NbO3-xLiSbO3 piezoelectric ceramics were prepared through conventional mixed oxide fabrication methods with different sintering temperatures. Although the (Na0.5K0.5)NbO3 piezoelectric material is representative among the lead-free ceramics, it is difficult to densify by typical sintering techniques owing to its easy evaporation properties of potassium (K+) and sodium ion (Na+). Hence, lithium (Li+) and antimony ion (Sb5+) were used for the partial substitution of (Na0.5K0.5)NbO3. With the optimized sintering temperature, Li+ and Sb5+ are expected to be crucial in increasing the density and enhance the piezoelectric and ferroelectric properties. In this study, the phase, microstructure, and dielectric and electrical properties of (1-x)(Na0.5K0.5)NbO3-xLiSbO3 ceramics depending on the sintering temperature is examined by employing X-ray diffraction, field emission scanning electron microscopy, impedance analyzer, and mechanical force system for energy harvesting. © 2018 Elsevier Ltd and Techna Group S.r.l.
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