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(Na,K)NbO3-CaCu3Ti4O12 perovskite composites for supercapacitor based piezoelectric devices
- Authors
- Ji, Jae-Hoon; Lee, Ji-Won; Chung, Hyunsoo; Koh, Jung-Hyuk
- Issue Date
- Mar-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Lead-free piezoelectric; Sintering temperature; Energy harvesting
- Citation
- CERAMICS INTERNATIONAL, v.42, no.4, pp 4978 - 4983
- Pages
- 6
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 42
- Number
- 4
- Start Page
- 4978
- End Page
- 4983
- ISSN
- 0272-8842
1873-3956
- Abstract
- The supercapacitorbased piezoelectric material composite (Na,K)NbO3-CaCu3Ti4O12 (NKN-CCTO) is investigated for possible application in piezoelectric devices. (1-x)NICN-xCCTO (0.015 <= x <= 0.06) with different sintering conditions is researched for supercapacitor based piezoelectric applications. The 0.94NKN-0.06CCTO composite sintered at 975 degrees C shows the highest dielectric permittivity of 796. Clear SEM images of (1-x)NKN-xCCTO reveal that these compositions have high density well-crystallized structures. The composition and sintering temperature dependence of dielectric permittivities and piezoelectric coefficients, plotted in three dimensions, show that the 0.985NKN-0.015CCTO composite sintered at 1025 degrees C has a moderate dielectric permittivity of 405 and a piezoelectric constant of 98 pC/N. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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