References
- K. T. P. Seifert, W. Jo, and J. Roedel, Temperature-Insensitive Large Strain of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-(K0.5Na0.5)NbO3 lead-free piezoceramics, J. Am. Ceram. Soc. 93, 1392 (2010).
- O. Ozmen, C. Ozsoy-Keskinbora, and E. Suvaci, Chemical stability of KNbO3, NaNbO3, and K0.5Na0.5NbO3 in aqueous medium, J. Am. Ceram. Soc. 101 (3), 1074 (2018). DOI: https://doi.org/10.1111/jace.15291.
- T. Shiraishi et al., Characterization of (111)-oriented epitaxial (K0.5Na0.5)NbO3 thick films deposited by hydrothermal method, Jpn. J. Appl. Phys. 56 (10S), 10PF04 (2017). DOI: https://doi.org/10.7567/JJAP.56.10PF04.
- Y. Saito et al., Lead-free piezoceramics, Nature 432 (7013), 84 (2004). DOI: https://doi.org/10.1038/nature03028.
- W. Wu et al., Microstructure and electrical properties of relaxor (1-x)[(K0.5Na0.5)0.95Li0.05](Nb0.95Sb0.05)O3-xBaTiO3 piezoelectric ceramics, Ceram. Int. 38 (3), 2277 (2012). DOI: https://doi.org/10.1016/j.ceramint.2011.10.079.
- H. Du et al., An approach to further improve piezoelectric properties of (K0.5Na0.5)NbO3-based lead-free ceramics, Appl. Phys. Lett. 91 (20), 202907 (2007)., DOI: https://doi.org/10.1063/1.2815750.
- Q. Yu et al., Determination of crystallographic orientation of lead-free piezoelectric (K,Na)NbO3 epitaxial thin films grown on SrTiO3 (100) surfaces, Appl. Phys. Lett. 104 (10), 102902 (2014). DOI: https://doi.org/10.1063/1.4868431.
- P. K. Panda, Review: environmental friendly lead-free piezoelectric materials, J. Mater. Sci. 44 (19), 5049 (2009). DOI: https://doi.org/10.1007/s10853-009-3643-0.
- W. Jin et al., Evolution of the composition, structure, and piezoelectric performance of (K1-xNax)NbO3 nanorod arrays with hydrothermal reaction time, Appl. Phys. Lett. 112 (14), 142904 (2018). DOI: https://doi.org/10.1063/1.5021378.
- C. Sun et al., Hydrothermal synthesis of single crystalline (K,Na)NbO3 powders, Eur. J. Inorg. Chem. 13, 1884 (2007).
- L. Ramajo et al., Influence of surface modifiers on hydrothermal synthesis of KxNa1-xNbO3, J. Mater. Sci: Mater. Electron. 26 (12), 9402 (2015). DOI: https://doi.org/10.1007/s10854-015-3262-2.
- C. Li et al., A novel multiple interface structure with the segregati-on of dopants in lead-free ferroelectric (K0.5Na0.5)NbO3 thin films, Adv. Mater. Interfaces 5 (2), 1700972 (2018). DOI: https://doi.org/10.1002/admi.201700972.
- C. Y. Jiang, X. X. Tian, and G. D. Shi, K0.5Na0.5NbO3 piezoelectric ceramics and its composites fabricated from hydrothermal powders, Adv. Intell. Syst. Res. 136, 321 (2016). DOI: https://doi.org/10.2991/icsma-16.2016.58.
- P. Li, J. W. Zhai, and B. Shen, Ultrahigh piezoelectric properties in textured (K,Na)NbO3, based lead-free ceramics, Adv. Mater. 30, 1705171 (2018). DOI: https://doi.org/10.1002/adma.201705171.
- L. Bai et al., Synthesis of (K,Na)NbO3 particles by traditional hydrothermal method and high-temperature mixing method under hydrothermal-solvothermal conditions, Res. Chem. Intermed. 37 (2–5), 185 (2011). DOI: https://doi.org/10.1007/s11164-011-0265-3.
- D. Zhang et al., Hydrothermal preparation and characterization of sheet-like (KxNa1-x)NbO3 perovskites, Ceram. Int. 42 (7), 9073 (2016). DOI: https://doi.org/10.1016/j.ceramint.2016.02.170.
- Y. J. Dai, X. W. Zhang, and K. P. Chen, Morphotropic phase boundary and electrical properties of K1-xNaxNbO3 lead-free ceramics, Appl. Phys. Lett. 94 (4), 042905 (2009). DOI: https://doi.org/10.1063/1.3076105.
- M. S. Chae et al., Improved piezoelectric properties of Ag doped 0.94(K0.5-βNa0.5-β)NbO3-0.06Li1-γNbO3 ceramics by templated grain growth method, J. Electroceram. 30 (1–2), 60 (2013). DOI: https://doi.org/10.1007/s10832-012-9717-4.
- G. D. Shi et al., Hydrothermal synthesis of morphology-controlled KNbO3, NaNbO3, and (K,Na)NbO3 powders, Ceram. Int. 43 (9), 7222 (2017). DOI: https://doi.org/10.1016/j.ceramint.2017.03.012.
- H. B. Xu, I. T. Seo, B. H. Hwang, T. G. Lee, and S. J. Park, Synthesis of [10]-oriented (Na1-xKx)NbO3 platelets by using hydrothermally produced (K8-8xNa8x)Nb6·O19- nH2O precursor, J. Am. Ceram. Soc. 99, 796 (2016).
- H. Xu et al., Synthesis of homogeneous (Na1-xKx)NbO3 nanorods using hydrothermal and post-heat treatment processes, Chem. Eng. J. 211–212, 16 (2012). DOI: https://doi.org/10.1016/j.cej.2012.09.052.
- F. Zhang, S. Bai, and T. Karaki, Preparation of plate-like potassium sodium niobate particles by hydrothermal method, Phys. Status Solidi A. 208 (5), 1052 (2011). DOI: https://doi.org/10.1002/pssa.201000097.
- L. Su et al., Isopropanol-assisted hydrothermal synthesis of (K, Na)NbO3 piezoelectric ceramic powders, J. Mater. Sci. 45 (12), 3311 (2010). DOI: https://doi.org/10.1007/s10853-010-4348-0.
- R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides, Acta Cryst. A. 32 (5), 751 (1976). DOI: https://doi.org/10.1107/S0567739476001551.
- Y. Li et al., Synthesis and piezoelectric properties of KxNa1-xNbO3 ceramic by molten salt method, J. Alloys Compd. 496 (1–2), 282 (2010). DOI: https://doi.org/10.1016/j.jallcom.2010.01.139.
- M. Ahtee, and A. W. Hewat, Structural phase transitions in sodium–potassium niobate solid solutions by neutron powder diffraction, Acta Cryst. A. 34 (2), 309 (1978). DOI: https://doi.org/10.1107/S056773947800056X.
- P. Bomlai et al., Effect of calcination conditions and excess alkali carbonate on the phase formation and particle morphology of Na0.5K0.5NbO3 powders, J. Am. Ceram. Soc. 90 (5), 1650 (2007). DOI: https://doi.org/10.1111/j.1551-2916.2007.01629.x.
- B. Q. Ming, J. F. Wang, and G. Z. Zang, The analysis of X-ray diffraction and phase transition on KNN lead-free piezoelectric ceramics, Acta Phys. Sin. 57, 5962 (2008).
- H. Du et al., Perovskite lithium and bismuth modified potassium-sodium niobium lead-free ceramics for high temperature applications, Appl. Phys. Lett. 91 (18), 182909 (2007)., DOI: https://doi.org/10.1063/1.2800793.
- K. L. Ding et al., Thermochemical reduction of magnesium sulfate by natural gas: insights from an experimental study, Geochem. J. 45 (2), 97 (2011). DOI: https://doi.org/10.2343/geochemj.1.0103.