Effect of Li2O and CuO additives on the structural and piezoelectric properties of (Na0.5K0.5)(Nb0.96Sb0.04)O-3 lead-free piezoelectric ceramics
- Authors
- Choi, Min-Kyu; Park, Hwi-Yeol; Seo, In-Tae; Choi, Jae-Hong; Kim, Woong; Nahm, Sahn; Lee, Hwack-Joo
- Issue Date
- 5월-2011
- Publisher
- ELSEVIER
- Keywords
- Ceramics; Piezoelectricity; Electron energy loss spectroscopy (EELS); Microstructure
- Citation
- CURRENT APPLIED PHYSICS, v.11, no.3, pp.598 - 603
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 11
- Number
- 3
- Start Page
- 598
- End Page
- 603
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112499
- DOI
- 10.1016/j.cap.2010.10.005
- ISSN
- 1567-1739
- Abstract
- [(Na0.5K0.5)(1-x)Li-x](Nb0.96Sb0.04)O-3 [NKLNS100x] ceramics with 0.0 <= x <= 0.1 were sintered at 1040 degrees C for 2 h and the specimens with x >= 0.05 had a dense microstructure due to liquid phase sintering. The specimen with x = 0.05 had both orthorhombic and tetragonal phases, and showed good piezoelectric roperties of k(p) = 0.43, d(33) = 243 pC/N and epsilon(T)(33)/epsilon(0) = 990. The [(Na0.5K0.5)(0.95)Li-0.05](Nb0.96Sb0.04)O-3 [NKLNS5] ceramics sintered at 960 degrees C also showed a high density by the addition of CuO, due to the production of the CuO and Na2O-related liquid phase. The Cu2+ ions were considered to replace Nb5+ ions and act as a hardener, which increased the Q(m) value of the NKLNS5 ceramics. High piezoelectric properties of k(p) = 0.37. Q(m) = 560, epsilon(T)(33)/epsilon(0) = 600 and d(33) = 170 pC/N were obtained from the specimen containing 1.5 mol% of CuO sintered at 960 degrees C for 2 h. (C) 2010 Elsevier B.V. All rights reserved.
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