Tao H, Wu H, Liu Y, et al. Ultrahigh performance in lead-free piezoceramics utilizing a relaxor slush polar state with multiphase coexistence. J Am Chem Soc 2019, 141: 13987-13994.
Kobayashi K, Doshida Y, Mizuno Y, et al. Possibility of cofiring a nickel inner electrode in a (Na0.5K0.5)NbO3-LiF piezoelectric actuator. Jpn J Appl Phys 2013, 52: 09KD07.
Fisher JG, Kang SJL. Microstructural changes in (K0.5Na0.5)NbO3 ceramics sintered in various atmospheres. J Eur Ceram Soc 2009, 29: 2581-2588.
Vendrell X, García JE, Rubio-Marcos F, et al. Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics. J Eur Ceram Soc 2013, 33: 825-831.
Teranishi S, Suzuki M, Noguchi Y, et al. Giant strain in lead-free (Bi0.5Na0.5)TiO3-based single crystals. Appl Phys Lett 2008, 92: 182905.
Qiao XS, Chen XM, Lian HL, et al. Microstructure and electrical properties of nonstoichiometric 0.94(Na0.5Bi0.5+x)TiO3-0.06BaTiO3 lead-free ceramics. J Am Ceram Soc 2016, 99: 198-205.
Saiful Islam M. Ionic transport in ABO3 perovskite oxides: A computer modelling tour. J Mater Chem 2000, 10: 1027-1038.
Kobayashi K, Doshida Y, Mizuno Y, et al. A route forwards to narrow the performance gap between PZT and lead-free piezoelectric ceramic with low oxygen partial pressure processed (Na0.5K0.5)NbO3. J Am Ceram Soc 2012, 95: 2928-2933.
Watanabe Y, Sumida K, Yamada S, et al. Effect of Mn-doping on the piezoelectric properties of (K0.5Na0.5)(Nb0.67Ta0.33)O3 lead-free ceramics. Jpn J Appl Phys 2008, 47: 3556-3558.
Mgbemere HE, Herber RP, Schneider GA. Effect of MnO2 on the dielectric and piezoelectric properties of alkaline niobate based lead free piezoelectric ceramics. J Eur Ceram Soc 2009, 29: 1729-1733.
Lin DM, Kwok KW, Tian HY, et al. Phase transitions and electrical properties of (Na1-xKx)(Nb1-ySby)O3 lead-free piezoelectric ceramics with a MnO2 sintering aid. J Am Ceram Soc 2007, 90: 1458-1462.
Kizaki Y, Noguchi Y, Miyayama M. Defect control for low leakage current in K0.5Na0.5NbO3 single crystals. Appl Phys Lett 2006, 89: 142910.
Noguchi Y, Miyayama M. Effect of Mn doping on the leakage current and polarization properties in K0.14Na0.86NbO3 ferroelectric single crystals. J Ceram Soc Jpn 2010, 118: 711-716.
Kawada S, Hayashi H, Ishii H, et al. Potassium sodium niobate-based lead-free piezoelectric multilayer ceramics Co-fired with nickel electrodes. Materials 2015, 8: 7423-7438.
Moulder JF, Stickle WF, Sobol PE, et al. Handbook of X-ray Photoelectron Spectroscopy: A Reference Book of Standard Spectra for Identification and Interpretation of XPS Data. Minnesota (USA): Physical Electronics, 1992.
Shannon RD. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Cryst A 1976, 32: 751-767.
Rafiq MA, Tkach A, Costa ME, et al. Defects and charge transport in Mn-doped K0.5Na0.5NbO3 ceramics. Phys Chem Chem Phys 2015, 17: 24403-24411.
Li JF, Wang K, Zhu FY, et al. (K,Na)NbO3-based lead-free piezoceramics: Fundamental aspects, processing technologies, and remaining challenges. J Am Ceram Soc 2013, 96: 3677-3696.
Zhang BY, Wu JG, Wang XP, et al. Rhombohedral- orthorhombic phase coexistence and electrical properties of Ta and BaZrO3 co-modified (K,Na)NbO3 lead-free ceramics. Curr Appl Phys 2013, 13: 1647-1650.
Cheng XX, Zhou DX, Fu QY, et al. Effect of reoxidation annealing on the PTCR behaviour of multilayer Nb5+-doped BaTiO3 ceramics with a Ni internal electrode. J Phys D: Appl Phys 2012, 45: 385306.
Niimi H, Mihara K, Sakabe Y, et al. Influence of Ba/Ti ratio on the positive temperature coefficient of resistivity characteristics of Ca-doped semiconducting BaTiO3 fired in reducing atmosphere and reoxidized in air. J Am Ceram Soc 2007, 90: 1817-1821.
Gao C, Fu QY, Zhou DX, et al. Nanocrystalline semiconducting donor-doped BaTiO3 ceramics for laminated PTC thermistor. J Eur Ceram Soc 2017, 37: 1523-1528.
Sun Y, Liu HX, Hao H, et al. Effect of oxygen vacancy on electrical property of acceptor doped BaTiO3-Na0.5Bi0.5TiO3-Nb2O5 X8R systems. J Am Ceram Soc 2016, 99: 3067-3073.
Yoon SH, Randall CA, Hur KH. Effect of acceptor (Mg) concentration on the resistance degradation behavior in acceptor (Mg)-doped BaTiO3 bulk ceramics: I. impedance analysis. J Am Ceram Soc 2009, 92: 1758-1765.
Robels U, Arlt G. Domain wall clamping in ferroelectrics by orientation of defects. J Appl Phys 1993, 73: 3454-3460.
Jin L, Li F, Zhang SJ. Decoding the fingerprint of ferroelectric loops: Comprehension of the material properties and structures. J Am Ceram Soc 2014, 97: 1-27.
Zhao ZH, Dai YJ, Li XL, et al. The evolution mechanism of defect dipoles and high strain in MnO2-doped KNN lead-free ceramics. Appl Phys Lett 2016, 108: 172906.
Feng ZY, Ren XB. Aging effect and large recoverable electrostrain in Mn-doped KNbO3-based ferroelectrics. Appl Phys Lett 2007, 91: 032904.
Ge HY, Hou YD, Rao X, et al. The investigation of depoling mechanism of densified KNbO3 piezoelectric ceramic. Appl Phys Lett 2011, 99: 032905.
Fu J, Zuo RZ. Giant electrostrains accompanying the evolution of a relaxor behavior in Bi(Mg,Ti)O3-PbZrO3- PbTiO3 ferroelectric ceramics. Acta Mater 2013, 61: 3687-3694.
Li P, Chen XQ, Wang FF, et al. Microscopic insight into electric fatigue resistance and thermally stable piezoelectric properties of (K,Na)NbO3-based ceramics. ACS Appl Mater Interfaces 2018, 10: 28772-28779.
Luo ZH, Glaum J, Granzow T, et al. Bipolar and unipolar fatigue of ferroelectric BNT-based lead-free piezoceramics. J Am Ceram Soc 2011, 94: 529-535.