Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

The Effect of Synthesis Route on the Microstructure and Dielectric Properties of Bulk (K0.44-Na0.52Li0.04)(Ta0.1Sb0.06Nb0.84)O3 Piezoceramics

Authors
Mohamad Ali Bahrevar 1
Mehdi Delshad Chermahini 2
Mohamad Reza Rahimipour 1
Homan Shokrollahi 3
1 Materials and Energy Research Center, Department of Semiconductors, Karaj, Iran
2 Energy Research Center, Department of Semiconductors, Karaj, Iran
3 Shiraz University of Thechnology, Department of Electroceramic, Shiraz , Iran
10.30501/jamt.2636.70295
Abstract
Lead free piezoceramics of the (K0.44Na0.52Li0.04)(Ta0.1Sb0.06Nb0.84)O3 specimens were prepared using the conventional ceramic and aqueous colloidal coating approach. The microstructure and dielectric properties of sintered samples prepared by both techniques were investigated for comparison. The XRD patterns indicate the formation of pure perovskite phase for samples prepared by colloidal technique. An additional impurity phase with tungsten bronze structure was detected for samples synthesized by the conventional method. For both methods, the typical cube-like morphology of KNN-LST systems with the bimodal distribution was clearly observed. The relative permittivity and loss factor of samples synthesized by aqueous colloidal coating approach were higher and lower than those obtained by conventional ceramic technique, respectively.
Keywords
Dielectric properties
Aqueous colloidal coating approach
Potassium sodium niobate
XRD
SEM
  1. Hollenstein, E. , Damjanovic, D. , Setter, N. “Temperature stability of the piezoelectric properties of Li-modified KNN ceramics”, Journal of the European Ceramic Society, 2007, 27, 4093–4097.
  2.  Bomlai, P. , Muensit, N. , “Structural and electrical properties of Na0.47K0.47Li0.06NbO3 lead-free piezoelectric ceramics modified by AgSbO3 , "Ceramic International, 2013, 39, S135-S138. 
  3.  Moosavi, A. , Bahrevar, M. A. , Aghaei, A. R. , “Ramos, High-field electromechanical response of Bi0.5Na0.5TiO3–Bi0.5K0.5TiO3 across its morphotropic phase boundary”, Journal of Physics D: Applied Physics, 47 055304 doi:10.1088/0022- 3727/47/5/055304.
  4.  Bernard, J. , Wan, A. B. , Rojac, T. , “Low-temperature sintering of K0.5Na0.5NbO3 ceramics”, Journal of the American Ceramic Society, 2008, 91, 2409–2411. 
  5.  Zhengfa, L. , Yongxiang, L. , Jiwei, Z., “Grain growth and piezoelectric property of KNN-based lead-free ceramics”, Current Applied Physics, 2011, 11, S2-S13.
  6.  Feng, J. Li., Wang, K. , Zhu, F. , Cheng, L., “(K, Na)NbO3-Based Lead-Free Piezoceramics: Fundamental aspects, processing technologies, and remaining challenges”, Journal of the American Ceramic Society, 2013, 96, 3677–3696.
    7. Wada, S. , Yamashita, K., “Enhanced piezoelectric,
    properties of barium titanate–potassium niobate nanostructured ceramics by MPB engineering”, Ceramic
    International, 2013, 39, S97–S102.
    8. Xu, L.W. , Chu, Z. R. , Zeng, H. “ Enlarged polymorphic
    phase transition boundary and enhanced piezoelectricity
    in ternary component 0.8Ba1−xCaxTiO3–
    0.1BaTi0.8Zr0.2O3–0.1BaTi0.9Sn0.1O3 ceramics”,
    Materials Letters, 2013, 110, 80-82.
    9. Wongsaenmai,S. , Ananta, S. , Yimnirun, R. “ Effect
    of Li addition on phase formation behavior and electrical
    properties of (K0.5Na0.5)NbO3 lead free ceramics”,
    Ceramic International, 2012, 39, 147-152.
    10. Hagh, N. M. , Kerman, K. , Safari, A. , “Dielectric and
    piezoelectric properties of Cu2+-doped alkali niobates”,
    Journal of the European Ceramic Society, 2009, 29,
    2325–2332.
    11. Mgbemere, H. E. , Herber, R. P. , Gerold , A. S. , “Effect
    of MnO2 on the dielectric and piezoelectric properties of
    alkaline niobate based lead free piezoelectric ceramics”,
    Journal of the European Ceramic Society, 2009, 29,
    1729–1733.
    12. Qian, S. , Kongjun, Z. , Pang, X. , “Phase transition,
    microstructure ,and dielectric properties of Li/Ta/Sbcodoped(K,Na)NbO3 lead-free ceramics”, Ceramics
    International, 2014, 40, 4389–4394.