Structure and Physical Properties of ZnO-Doped KNLN Lead-Free Piezoelectric Ceramics
Composite Materials
Volume 1, Issue 1, December 2017, Pages: 1-7
Received: Oct. 27, 2016; Accepted: Nov. 22, 2016; Published: Jan. 3, 2017
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Phan Dinh Gio, Department of Physics, Hue University College of Sciences, Hue City, Vietnam
Van Thi Bich Thuy, Department of Physics, Hue University College of Sciences, Hue City, Vietnam
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The ZnO-doped 0.96(K0.5Na0.5)NbO3–0.04LiNbO3 (KNLN) piezoelectric ceramics were prepared by conventional ceramics process, using oxides and carbonates mixture, sintered in the solid state at 1050°C. Effect of ZnO on structure and dielectric, ferroelectric, piezoelectric properties of KNLN ceramics were studied. The experimental results showed that the ZnO-doped KNLN ceramics have the pure perovskite structure with orthorhombic symmetry at x  0.5 wt.% ZnO. The ZnO addition significantly improved the electrical properties of KNLN ceramics. At ZnO content of 0.5 wt.%, the electrical properties of ceramics are the best: kp=0.35, kt=0.45, d31=52pC/N, Qm=33, Pr=8.0 C/cm2.
Lead-Free Piezoceramics, Crystal Structure, ZnO Addition, Dielectric
To cite this article
Phan Dinh Gio, Van Thi Bich Thuy, Structure and Physical Properties of ZnO-Doped KNLN Lead-Free Piezoelectric Ceramics, Composite Materials. Vol. 1, No. 1, 2017, pp. 1-7. doi: 10.11648/
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K. Uchino, Piezoelectric Actuators and Ultrasonic Motors. Kluwer Academic Publishers, Boston, (1997).
B. Jaffe, W. R. Cook, and H. Jaffe (Eds.), Piezoelectric Ceramics, Academic, New York (1971).
Y. Xu (Eds.), Ferroelectric Materials and Their Applications, Elsevier Science, Amsterdam-London-New York-Tokyo (1991).
Saito Y, Takao H, Tani T, Nonoyama T, Takatori K, Homma, Nagoya, T, Nakamura M., Lead-free piezoceramics,Nature 432, 84-87 (2004).
In-Young Kang, In-Tae Seo, Yu-Joung Cha, Jae-Hong Choi, Sahn Nahm,Tae-Hyun Sung, Jong-Hoo Paik, Low temperature sintering of ZnO and MnO2-added (Na0.5K0.5)NbO3ceramics. Journal of the European Ceramic Society 32, 2381–2387 (2012).
EU-Directive 2002/96/EC, “Waste Electrical and Electronic Equipment (WEEE),” Off. J. Eur. Union, 46 [L37] 24–38 (2003).
Jing-Feng Li, Ke Wang, Fang-Yuan Zhu, Li-Qian Cheng, and Fang-Zhou Yao, (K,Na)NbO3-Based Lead-Free Piezoceramics: Fundamental Aspects, Processing Technologies, and Remaining Challenges, J. Am. Ceram. Soc.,96 3677–3696 (2013).
Wenxin Ma, Xinghua Fu1, Wenhong Tao, Lei Yang, Guoyuan Cheng and Liping Zhao, KNN-Sb lead-free piezoelectric ceramics synthesized by hydrothermal method, Materials Science Forum, Vol. 859, pp 3-7 (2016).
RuzhongZuoa, ShiSua, Yang Wua, JianFua, Min Wanga, Longtu Li,Influence of A-site nonstoichiometry on sintering, microstructure and electrical properties of (Bi0.5Na0.5)TiO3 ceramics, Materials Chemistry and Physics 110, 311–315 (2008).
Sonia Bhandari, NidhiSinha, Geeta Raya and Binay Kumar, Processing and properties of ferroelectric Bi0.5(Na0.65K0.35)0.5TiO3 ceramics under the effect of different sintering temperature, ScriptaMaterialia 89, 61–64 (2014).
Ke WANG, Jing-Feng LI, (K, Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement, Journal of Advanced Ceramics, 1(1): 24-37 (2012).
Tomoaki KARAKI, KangY AN, Toshiyuki MIYAMOTO, and Masatoshi ADACHI, Lead-Free Piezoelectric Ceramics with Large Dielectric and Piezoelectric Constants Manufactured from BaTiO3 Nano-Powder, Japanese Journal of Applied Physics, Vol. 46, No.4, pp. L97–L98 (2007).
Narayana Murty S, Ramana Murty KV, Umakantham K, et al. Modified (Na,K)NbO3 ceramics for transducer applications. Ferroelectrics, 102: 243–247 (1990).
Y. Guo, K. Kakimoto, and H. Ohsato, Phase transitional behavior and piezoelectric properties of (Na0.5K0.5)NbO3-LiNbO3 ceramics. Appl. Phys. Lett. 85, 4121 (2004).
M. Matsubara, K. Kikuta, and S. Hirano, Piezoelectric properties of (K0.5 Na0.5)(Nb1-xTax)O3-K5.4CuTa10O29 ceramics. J. Appl. Phys. 97, 114105 (2005).
S. J. Zhang, R. Xia, and T. R. Shrout, et al., Piezoelectric properties in perovskite 0.948(K0.5Na0.5)NbO3–0.052LiSbO3 lead-free ceramics. J. Appl. Phys. 100, 104108 (2006).
Q. Chen, L. Chen, Q. S. Li, X. Yue, D. Q. Xiao, J. G. Zhu, X. L. Shi, and Z. Q. Liu, Piezoelectric properties of K4CuNb8O23 modified (Na0.5K0.5)NbO3 lead-free piezoceramics. J. Appl. Phys. 102 (10), 104109 (2007).
J. G. Wu, Y. Y. Wang, D. Q. Xiao, J. G. Zhu, and Z. H. Pu, Effects of Ag content on the phase structure and piezoelectric properties of (K0.44-xNa0.52Li0.04Agx)(Nb0.91Ta0.05Sb0.04)O3 lead-free ceramics. Appl. Phys. Lett. 91, 132914 (2007).
Egerton L., Dillon D. M., Piezoelectric and dielectric properties of ceramics in the system potassium-sodium niobate. J. Am. Ceram. Soc. 42: 438–442, (1959).
Hongliang Du, Fusheng Tang, Daijun Liu, Dongmei Zhu, The microstructure and ferroelectric properties of (K0.5Na0.5)NbO3–LiNbO3 lead-free piezoelectric ceramics. Materials Science and Engineering B 136,165-169, (2007).
Zong-Yang Shen, Yue-Ming Li, Liang Jiang, Run-Run Li, Zhu-Mei Wang, Yan Hong, Run-Hua Liao, Phase transition and electrical properties of LiNbO3-modified K0.49Na0.51NbO3 lead-free piezoceramics, J. Mater. Sci: Mater. Electron 22, 1071–1075 (2011).
Hai-Tao Li, Bo-Ping Zhang, MinCui, Wei-GangYang, Nan Ma, Jing-Feng Li, Microstructure, crystalline phase, and electrical properties of ZnO-added Li0.06(Na0.535K0.48)0.94NbO3 ceramics, Current Applied Physics 11 S184-S188 (2011).
Park S-H, Ahn C-W, Nahm S, Song J-S, Microstructure and piezoelectric properties of ZnO-added (Na0.5K0.5)NbO3 ceramics. Jpn. J. Appl. Phys., 43:L1072–4 (2004).
In-Young Kang, In-Tae Seo, Yu-Joung Cha, Jae-Hong Choi, SahnNahm,Tae-Hyun Sung, Jong-Hoo Paik, Low temperature sintering of ZnO and MnO2-added (Na0.5K0.5)NbO3ceramics. Journal of the European Ceramic Society 32, 2381–2387 (2012).
Phan Dinh Gio and Nguyen T. Kieu Lien, Effect of LiNbO3 on the structure, microstructure and dielectric, ferroelectric properties of (K0.5Na0.5)NbO3 lead free ceramics, Indian Journal of Scientific research and technology, Vol. 3 (5), 48-53, (2015).
Canhan SEN, Berk ALKAN, Ipek AKIN, Onuralp YUCEL, FilizCinar SAHIN &Gultekin GOLLER. Microstructure and ferroelectric properties of spark plasma sintered Li substituted K0.5Na0.5NbO3 ceramics. Journal of the Ceramic Society of Japan, 119(5) 355-361 (2011).
Tanaka J, OnodaY, Tsukioka M, Shimazu M & Ehara S. The RMN study of Li ion motion in K3Li Nb6O17 and K3LiTaO17, Japanese Journal of Applied Physics, 21, 451-455 (1982).
Leandro Alfredo Ramajo, Jonathan Taub, Miriam Susana Castro, Effect of ZnO Addition on the Structure, Microstructure and Dielectric and Piezoelectric Properties of K0.5Na0.5NbO3 Ceramics, Materials Research, 17(3):728-733 (2014).
F. Rubio-Marcos, J. J. Romero, M. G. Navarro-Rojero, and J. F. Fernandez, Effect of ZnO on the Structure, Microstructure and Electrical Properties of KNN-Modified Piezoceramics, J. Eur. Ceram. Soc., 29, 3045–52 (2009).
Dai Y., Zhang X. and Zhu G., Phase transitional behavior in K0.5Na0.5NbO3–LiTaO3 ceramics. Appl. Phys. Lett., 90, 262903 (2007).
International Centre for Diffraction Data, JCPDS-ICDD 2001, File No. 71-2171.
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