References(124)
[1]
Rödel J, Webber KG, Dittmer R, et al. Transferring lead-free piezoelectric ceramics into application. J Eur Ceram Soc 2015, 35: 1659–1681.
[2]
Thong HC, Zhao CL, Zhou Z, et al. Technology transfer of lead-free (K,Na)NbO3-based piezoelectric ceramics. Mater Today 2019, 29: 37–48.
[3]
Qing X, Li W, Wang Y, et al. Piezoelectric transducer-based structural health monitoring for aircraft applications. Sensors 2019, 19: 545.
[4]
Siddique ARM, Mahmud S, van Heyst B. A comprehensive review on vibration based micro power generators using electromagnetic and piezoelectric transducer mechanisms. Energy Convers Manag 2015, 106: 728–747.
[5]
Gupta V, Sharma M, Thakur N. Active structural vibration control: Robust to temperature variations. Mech Syst Signal Process 2012, 33: 167–180.
[6]
Liu YX, Qu W, Thong HC, et al. Isolated-oxygen-vacancy hardening in lead-free piezoelectrics. Adv Mater 2022, 34: 2202558.
[7]
Zhang SJ, Xia R, Lebrun L, et al. Piezoelectric materials for high power, high temperature applications. Mater Lett 2005, 59: 3471–3475.
[8]
Fan ZM, Koruza J, Rödel J, et al. An ideal amplitude window against electric fatigue in BaTiO3-based lead-free piezoelectric materials. Acta Mater 2018, 151: 253–259.
[9]
Maurya D, Zhou Y, Wang YJ, et al. Giant strain with ultra-low hysteresis and high temperature stability in grain oriented lead-free K0.5Bi0.5TiO3–BaTiO3–Na0.5Bi0.5TiO3 piezoelectric materials. Sci Rep 2015, 5: 8595.
[10]
Fan Y, Wang ZX, Huan Y, et al. Enhanced thermal and cycling reliabilities in (K,Na)(Nb,Sb)O3–CaZrO3–(Bi,Na)HfO3 ceramics. J Adv Ceram 2020, 9: 349–359.
[11]
Wang XJ, Huan Y, Zhu YX, et al. Defect engineering of BCZT-based piezoelectric ceramics with high piezoelectric properties. J Adv Ceram 2022, 11: 184–195.
[12]
Liu YX, Thong HC, Cheng YYS, et al. Defect-mediated domain-wall motion and enhanced electric-field-induced strain in hot-pressed K0.5Na0.5NbO3 lead-free piezoelectric ceramics. J Appl Phys 2021, 129: 024102.
[13]
Tanaka D, Yamazaki J, Furukawa M, et al. High power characteristics of (Ca,Ba)TiO3 piezoelectric ceramics with high mechanical quality factor. Jpn J Appl Phys 2010, 49: 09MD03.
[14]
Park HY, Seo IT, Choi MK, et al. Microstructure and piezoelectric properties of the CuO-added (Na0.5K0.5) (Nb0.97Sb0.03)O3 lead-free piezoelectric ceramics. J Appl Phys 2008, 104: 034103.
[15]
Liang WF, Xiao DQ, Wu JG, et al. Origin of high mechanical quality factor in CuO-doped (K,Na)NbO3-based ceramics. Front Mater Sci 2014, 8: 165–175.
[16]
Lin DM, Kwok KW, Chan HLW. Piezoelectric and ferroelectric properties of KxNa1−xNbO3 lead-free ceramics with MnO2 and CuO doping. J Alloys Compd 2008, 461: 273–278.
[17]
Hiruma Y, Watanabe T, Nagata H, et al. Piezoelectric properties of (Bi1/2Na1/2)TiO3-based solid solution for lead-free high-power applications. Jpn J Appl Phys 2008, 47: 7659–7663.
[18]
Zhang SJ, Lee HJ, Shrout TR. NBT based lead-free piezoelectric materials for high power applications. U.S. Patent 8 501 031, Aug. 2013.
[19]
Lee HJ, Ural SO, Chen L, et al. High power characteristics of lead-free piezoelectric ceramics. J Am Ceram Soc 2012, 95: 3383–3386.
[20]
Wang K, Li JF. Domain engineering of lead-free Li-modified (K,Na)NbO3 polycrystals with highly enhanced piezoelectricity. Adv Funct Mater 2010, 20: 1924–1929.
[21]
Wang K, Li JF. (K,Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement. J Adv Ceram 2012, 1: 24–37.
[22]
Zhang MH, Wang K, Du YJ, et al. High and temperature-insensitive piezoelectric strain in alkali niobate lead-free perovskite. J Am Chem Soc 2017, 139: 3889–3895.
[23]
Nguyen TN, Thong HC, Zhu ZX, et al. Hardening effect in lead-free piezoelectric ceramics. J Mater Res 2021, 36: 996–1014.
[24]
Liu H, Liu YX, Song AZ, et al. (K,Na)NbO3-based lead-free piezoceramics: One more step to boost applications. Natl Sci Rev 2022, 9: nwac101.
[25]
Peel MD, Ashbrook SE, Lightfoot P. Unusual phase behavior in the piezoelectric perovskite system, LixNa1−xNbO3. Inorg Chem 2013, 52: 8872–8880.
[26]
Yuzyuk YI, Gagarina E, Simon P, et al. Synchrotron X-ray diffraction and Raman scattering investigations of (LixNa1−x)NbO3 solid solutions: Evidence of the rhombohedral phase. Phys Rev B 2004, 69: 144105.
[27]
Mitra S, Kulkarni AR, Prakash O. Densification behaviour and two stage master sintering curve in lithium sodium niobate ceramics. Ceram Int 2013, 39: S65–S68.
[28]
Bazzan M, Fontana M. Preface to special topic: Lithium niobate properties and applications: Reviews of emerging trends. Appl Phys Rev 2015, 2: 040501.
[29]
Zhong WL, Zhang PL, Zhao HS, et al. Low-temperature phase transition of a crystal in the lithium sodium niobate system. Phys Rev B 1992, 46: 10583–10587.
[30]
Juang YD, Dai SB, Wang YC, et al. Low temperature phase transition of Li0.12Na0.88NbO3 studied by Raman scattering. J Appl Phys 2000, 88: 742–745.
[31]
Yang D, Gao J, Shu L, et al. Lead-free antiferroelectric niobates AgNbO3 and NaNbO3 for energy storage applications. J Mater Chem A 2020, 8: 23724–23737.
[32]
Lim JB, Zhang SJ, Lee HJ, et al. Shear-mode piezoelectric properties of modified-(K,Na)NbO3 ceramics for “hard” lead-free materials. J Am Ceram Soc 2010, 93: 2519–2521.
[33]
Zhang MH, Hu CP, Zhou Z, et al. Determination of polarization states in (K,Na)NbO3 lead-free piezoelectric crystal. J Adv Ceram 2020, 9: 204–209.
[34]
Mitra S, Kulkarni AR, Prakash O. Diffuse phase transition and electrical properties of lead-free piezoelectric (LixNa1−x)NbO3 (0.04 ≤ x ≤ 0.20) ceramics near morphotropic phase boundary. J Appl Phys 2013, 114: 064106.
[35]
Mishra SK, Shinde AB, Krishna PSR. Effect of particle size and strain on phase stability of (Li0.06 Na0.94)NbO3. J Appl Phys 2014, 115: 174104.
[36]
Nitta T. Properties of sodium–lithium niobate solid solution ceramics with small lithium concentrations. J Am Ceram Soc 1968, 51: 623–630.
[37]
Hardiman B, Henson RM, Reeves CP, et al. Hot pressing of sodium lithium niobate ceramics with perovskite-type structures. Ferroelectrics 1976, 12: 157–159.
[38]
Mitra S, Kulkarni AR, Prakash O. Diffuse phase transition in Li0.12Na0.88NbO3 piezoelectric ceramics. AIP Conf Proc 2013, 1512: 1256–1257.
[39]
Dixon CAL, Lightfoot P. Complex octahedral tilt phases in the ferroelectric perovskite system LixNa1−xNbO3. Phys Rev B 2018, 97: 224105.
[40]
Pozdnyakova I, Navrotsky A, Shilkina L, et al. Thermodynamic and structural properties of sodium lithium niobate solid solutions. J Am Ceram Soc 2002, 85: 379–384.
[41]
Kimura M, Ogawa T, Ando A, et al. Piezoelectric properties of metastable (Li,Na)NbO3 ceramics. In: Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, Nara, Japan, 2002: 339–342.
[42]
Aoyagi R, Maeda M, Yokota T, et al. Effects of heat treatment after poling on dielectric and piezoelectric properties in Li0.06Na0.94NbO3 ceramics. Jpn J Appl Phys 2013, 52: 09KD12.
[43]
Li CBW, Thong HC, Liu YX, et al. Thermally induced domain reconfiguration in ferroelectric alkaline niobate. Adv Funct Materials 2022, 32: 2204421.
[44]
Darlington CNW, Megaw HD. The low-temperature phase transition of sodium niobate and the structure of the low-temperature phase, N. Acta Crystallogr B 1973, 29: 2171–2185.
[45]
Glazer AM. Simple ways of determining perovskite structures. Acta Crystallogr A 1975, 31: 756–762.
[46]
Pardo L, Durán-Martin P, Mercurio JP, et al. Temperature behaviour of structural, dielectric and piezoelectric properties of sol–gel processed ceramics of the system LiNbO3–NaNbO3. J Phys Chem Solids 1997, 58: 1335–1339.
[47]
Grueninger HW, Zeyfang RR, Gauntlett M. Strukturelle und dielektrische eigenschaften von lithiumniobat–mischkristallen. Ber Dtsch Keram Ges 1975, 52: 238–239. (in German)
[48]
Reznichenko LA, Shilkina LA. Study of morphotropic regions in the system of solid solutions NaNbO3–LiNbO3. Izv AN USSR Ser Phys 1975, 39: 1118–1121.
[49]
Belyaev IN, Nalbandyan VB, Ivanov YA. Subsolidus solubility of lithium niobate in sodium niobate: Metastability of segnetoelectric perovskite phases. Izv Akad Nauk SSSR Neorg Mater 1984, 20: 491–494.
[50]
Radyush YV, Olekhnovich NM, Vyshatko NP, et al. Structural phase transitions of high-pressure LixNa1−xNbO3 solid solutions. Inorg Mater 2004, 40: 971–975.
[51]
Mishra SK, Choudhury N, Chaplot SL, et al. Competing antiferroelectric and ferroelectric interactions in NaNbO3: Neutron diffraction and theoretical studies. Phys Rev B 2007, 76: 024110.
[52]
Mishra SK, Mittal R, Pomjakushin VY, et al. Phase stability and structural temperature dependence in sodium niobate: A high-resolution powder neutron diffraction study. Phys Rev B 2011, 83: 134105.
[53]
Mishra SK, Gupta MK, Mittal R, et al. Suppression of antiferroelectric state in NaNbO3 at high pressure from in situ neutron diffraction. Appl Phys Lett 2012, 101: 242907.
[54]
Henson RM, Zeyfang RR, Kiehl KV. Dielectric and electromechanical properties of (Li,Na)NbO3 ceramics. J Am Ceram Soc 1977, 60: 15–17.
[55]
Von der Mühll R, Sadel A, Ravez J, et al. Etude des transitions ferroelectrique-paraelectrique des composes du systeme NaNbO3–LiNbO3. Solid State Commun 1979, 31: 151–156. (in French)
[56]
Shilkina LA, Reznichenko LA, Kupriyanov MF, et al. Phase-transitions in system of (Na1−xLix)NbO3 solid-solutions. Zhurnal Tekhnicheskoi Fiz 1977, 47: 2173–2178.
[57]
Shanker V, Samal SL, Pradhan GK, et al. Nanocrystalline NaNbO3 and NaTaO3: Rietveld studies, Raman spectroscopy and dielectric properties. Solid State Sci 2009, 11: 562–569.
[58]
Rubio-Marcos F, Bañares MA, Romero JJ, et al. Correlation between the piezoelectric properties and the structure of lead-free KNN-modified ceramics, studied by Raman spectroscopy. J Raman Spectrosc 2011, 42: 639–643.
[59]
Jiménez R, Sanjuán ML, Jiménez B. Stabilization of the ferroelectric phase and relaxor-like behaviour in low Li content sodium niobates. J Phys Condens Matter 2004, 16: 7493–7510.
[60]
Nobre MAL, Lanfredi S. Phase transition in sodium lithium niobate polycrystal: An overview based on impedance spectroscopy. J Phys Chem Solids 2001, 62: 1999–2006.
[61]
Mishra SK, Krishna PSR, Shinde AB, et al. High temperature phase stability in Li0.12Na0.88NbO3: A combined powder X-ray and neutron diffraction study. J Appl Phys 2015, 118: 094101.
[62]
Chen F, Li YH, Gao GY, et al. Intergranular stress induced phase transition in CaZrO3 modified KNN-based lead-free piezoelectrics. J Am Ceram Soc 2015, 98: 1372–1376.
[63]
Tripathi S, Pandey D, Mishra SK, et al. Morphotropic phase-boundary-like characteristic in a lead-free and non-ferroelectric (1−x)NaNbO3–xCaTiO3 system. Phys Rev B 2008, 77: 052104.
[64]
Garcia-Martin S, King G, Urones-Garrote E, et al. Spontaneous superlattice formation in the doubly ordered perovskite KLaMnWO6. Chem Mater 2011, 23: 163–170.
[65]
Dixon CAL, McNulty JA, Huband S, et al. Unprecedented phase transition sequence in the perovskite Li0.2Na0.8NbO3. IUCrJ 2017, 4: 215–222.
[66]
Gao Y, Wang JJ, Wu L, et al. Tunable magnetic and electrical behaviors in perovskite oxides by oxygen octahedral tilting. Sci China Mater 2015, 58: 302–312.
[67]
Megaw HD. Crystal structure of barium titanate. Nature 1945, 155: 484–485.
[68]
Bhalla AS, Guo R, Roy R. The perovskite structure—A review of its role in ceramic science and technology. Mater Res Innov 2000, 4: 3–26.
[69]
Eng HW, Barnes PW, Auer BM, et al. Investigations of the electronic structure of d0 transition metal oxides belonging to the perovskite family. J Solid State Chem 2003, 175: 94–109.
[70]
Tan Z, Xie SX, Jiang LM, et al. Oxygen octahedron tilting, electrical properties and mechanical behaviors in alkali niobate-based lead-free piezoelectric ceramics. J Materiomics 2019, 5: 372–384.
[71]
Zeyfang RR, Henson RM, Maier WJ. Temperature- and time-dependent properties of polycrystalline (Li,Na)NbO3 solid solutions. J Appl Phys 1977, 48: 3014–3017.
[72]
Zhang PL, Zhong WL, Zhao HS, et al. An unusual pyroelectric response. Solid State Commun 1988, 67: 1215–1217.
[73]
Mitra S, Patro PK, Kulkarni AR. Effect of alkaline excess on sintering, microstructural, and electrical properties of Li0.12Na0.88NbO3 ceramics. J Mater Sci 2016, 51: 9031–9042.
[74]
Chen Q, Peng ZH, Liu H, et al. The crystalline structure and phase-transitional behavior of (Li0.12Na0.88)(Nb1−x%Sbx%)O3 lead-free piezoelectric ceramics with high Qm. J Am Ceram Soc 2010, 93: 2788–2794.
[75]
Palatnikov MN, Efremov VV, Sidorov NV, et al. Properties of LixNa1−xTa0.1Nb0.9O3 ferroelectric ceramic solid solutions. Inorg Mater 2009, 45: 1423–1428.
[76]
Sadel A, von der Muhll R, Ravez J, et al. Ferroelectric and pyroelectric studies of a crystal of composition Li0.02Na0.98NbO3. Ferroelectrics 1983, 47: 169–175.
[77]
Kimura M, Kawada S, Shiratsuyu K, et al. Piezoelectric properties and applications of high Qm (Li,Na)NbO3 ceramics after heat treatment. Key Eng Mater 2004, 269: 3–6.
[78]
Aoyagi R, Iwata M, Maeda M. Piezoelectric properties and depolarization temperature of NaNbO3–LiNbO3 lead-free piezoelectric ceramics. Key Eng Mater 2008, 388: 233–236.
[79]
Reznichenko LA, Shilkina LA, Razumovskaya ON, et al. Dielectric and piezoelectric properties of NaNbO3-based solid solutions. Inorg Mater 2003, 39: 139–151.
[80]
Pardo L, Duran P, Millar CE, et al. High temperature electromechanical behaviour of sodium substituted lithium niobate ceramics. Ferroelectrics 1996, 186: 281–285.
[81]
Ohashi T, Aoyagi R, Maeda M, et al. Electrical properties and polarization reversal in (Li,Na)NbO3 lead-free piezoelectric ceramics. Key Eng Mater 2011, 485: 69–72.
[82]
Cohen RE. Origin of ferroelectricity in perovskite oxides. Nature 1992, 358: 136–138.
[83]
Cheng XJ, Wu JG, Xiao DQ, et al. An enhanced mechanical quality factor and a low dielectric loss in lithium sodium niobate lead-free ceramics. Ceram Int 2012, 38: 4023–4027.
[84]
Peng ZH, Chen Q, Yan DX, et al. Characterization of potassium-modified Li0.12Na0.88Nb0.97Sb0.03O3 lead-free piezoceramics. J Alloys Compd 2014, 582: 834–838.
[85]
Abubakarov AG, Pavelko AA, Sadykov KA, et al. Influence of CuO, MnO2, NiO, Bi2O3, and Fe2O3 modifiers on the crystalline structure and electrophysical properties of (Na,Li)NbO3 solid solutions. J Mater Sci 2017, 52: 2142–2157.
[86]
Mitra S, Kulkarni AR. Synthesis and electrical properties of new lead-free (100−x)(Li0.12Na0.88)NbO3–xBaTiO3 (0 ≤ x≤ 40) piezoelectric ceramics. J Am Ceram Soc 2016, 99: 888–895.
[87]
Aoyagi R, Rinaldi R, Sumiyama N, et al. Electrical properties and phase transition behavior of (Li,Na,Ba)(Nb,Ti)O3 lead-free piezoelectric ceramics. Key Eng Mater 2010, 421–422: 42–45.
[88]
Tan Z, Xing J, Wu B, et al. Novel rhombohedral and tetragonal phase boundary with high TC in alkali niobate ceramics. J Mater Sci Mater Electron 2017, 28: 12851–12857.
[89]
Cen ZY, Bian SS, Xu Z, et al. Simultaneously improving piezoelectric properties and temperature stability of Na0.5K0.5NbO3 (KNN)-based ceramics sintered in reducing atmosphere. J Adv Ceram 2021, 10: 820–831.
[90]
Palatnikov MN, Efremov VV, Sidorov NV, et al. The effects of thermo-baric synthesis on the structure and properties of the ferroelectric Li0.125Na0.875NbO3 solid solution. Ferroelectrics 2014, 469: 120–129.
[91]
Aoyagi R, Takeda A, Iwata M, et al. Depolarization temperature shift of Li0.08Na0.92NbO3 lead-free piezoelectric ceramics by high-electric-field poling. Jpn J Appl Phys 2008, 47: 7689–7692.
[92]
Fujii I, Kohori A, Adachi H, et al. Domain structures of (Li,Na)NbO3 epitaxial films. J Appl Phys 2017, 122: 044104.
[93]
Balluffi RW. Vacancy defect mobilities and binding energies obtained from annealing studies. J Nucl Mater 1978, 69–70: 240–263.
[94]
Vrancken B, Thijs L, Kruth JP, et al. Heat treatment of Ti6Al4V produced by Selective Laser Melting: Microstructure and mechanical properties. J Alloys Compd 2012, 541: 177–185.
[95]
Zhao CH, Gao S, Yang TN, et al. Precipitation hardening in ferroelectric ceramics. Adv Mater 2021, 33: 2102421.
[96]
Zhao CH, Gao S, Kleebe HJ, et al. Coherent precipitates with strong domain wall pinning in alkaline niobate ferroelectrics. Adv Mater 2022, 34: 2202379.
[97]
Hejazi M, Taghaddos E, Gurdal E, et al. High power performance of manganese-doped BNT-based Pb-free piezoelectric ceramics. J Am Ceram Soc 2014, 97: 3192–3196.
[98]
Liu YX, Thong HC, Zhao CL, et al. Influence of trace zirconia addition on the properties of (K,Na)NbO3 solid solutions. J Mater Chem C 2019, 7: 6914–6923.
[99]
Zhang SJ, Lim JB, Lee HJ, et al. Characterization of hard piezoelectric lead-free ceramics. IEEE T Ultrason Ferr 2009, 56: 1523–1527.
[100]
Slabki M, Wu J, Weber M, et al. Anisotropy of the high-power piezoelectric properties of Pb(Zr,Ti)O3. J Am Ceram Soc 2019, 102: 6008–6017.
[101]
Slabki M, Kodumudi Venkataraman L, Checchia S, et al. Direct observation of domain wall motion and lattice strain dynamics in ferroelectrics under high-power resonance. Phys Rev B 2021, 103: 174113.
[102]
Bhudolia SK, Gohel G, Leong KF, et al. Advances in ultrasonic welding of thermoplastic composites: A review. Materials 2020, 13: 1284.
[103]
Fan ZM, Tan XL. In-situ TEM study of the aging micromechanisms in a BaTiO3-based lead-free piezoelectric ceramic. J Eur Ceram Soc 2018, 38: 3472–3477.
[104]
Okayasu M, Ogawa T, Sasaki Y. In situ TEM observations of microstructural characteristics of lead zirconate titanate piezoelectric ceramic during heating to 1000 ℃. Ceram Int 2017, 43: 16306–16312.
[105]
Sha HZ, Cui JZ, Yu R. Deep sub-angstrom resolution imaging by electron ptychography with misorientation correction. Sci Adv 2022, 8: eabn2275.
[106]
Tang J, Wu YD, Kong LY, et al. Two-dimensional characterization of three-dimensional magnetic bubbles in Fe3Sn2 nanostructures. Natl Sci Rev 2021, 8: nwaa200.
[107]
Jannis D, Hofer C, Gao C, et al. Event driven 4D STEM acquisition with a Timepix3 detector: Microsecond dwell time and faster scans for high precision and low dose applications. Ultramicroscopy 2022, 233: 113423.
[108]
Gao J, Li W, Liu J, et al. Local atomic configuration in pristine and A-site doped silver niobate perovskite antiferroelectrics. Research 2022, 2022: 9782343.
[109]
Jeong IK, Park CY, Ahn JS, et al. Ferroelectric-relaxor crossover in Ba(Ti1−xZrx)O3 studied using neutron total scattering measurements and reverse Monte Carlo modeling. Phys Rev B 2010, 81: 214119.
[110]
Zhang MH, Hadaeghi N, Egert S, et al. Design of lead-free antiferroelectric (1−x)NaNbO3–xSrSnO3 compositions guided by first-principles calculations. Chem Mater 2021, 33: 266–274.
[111]
Chen NK, Bang J, Li XB, et al. Optical subpicosecond nonvolatile switching and electron–phonon coupling in ferroelectric materials. Phys Rev B 2020, 102: 184115.
[112]
Thong HC, Xu B, Wang K. Distinctive Nb–O hybridization at domain walls in orthorhombic KNbO3 ferroelectric perovskite. Appl Phys Lett 2022, 120: 052902.
[113]
Tao H, Wu HJ, 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.
[114]
Wu LJ, Zheng T, Wu JG. Excellent fatigue resistance in Sb nonstoichiometric KNN-based ceramics by engineering relaxor multiphase state. J Eur Ceram Soc 2022, 42: 4888–4897.
[115]
Wu J, Xiao D, Zhu J. Potassium-sodium niobate lead-free piezoelectric materials: Past, present, and future of phase boundaries. Chem Rev 2015, 115: 2559–2595.
[116]
Li P, Zhai JW, Shen B, et al. Ultrahigh piezoelectric properties in textured (K,Na)NbO3-based lead-free ceramics. Adv Mater 2018, 30: 1705171.
[117]
Lin JF, Cao YB, Zhu K, et al. Ultrahigh energy harvesting properties in temperature-insensitive eco-friendly high-performance KNN-based textured ceramics. J Mater Chem A 2022, 10: 7978–7988.
[118]
Puthucheri S, Pandey PK, Gajbhiye NS, et al. Microstructural, electrical, and magnetic properties of acceptor-doped nanostructured lead zirconate titanate. J Am Ceram Soc 2011, 94: 3941–3947.
[119]
Slouka C, Kainz T, Navickas E, et al. The effect of acceptor and donor doping on oxygen vacancy concentrations in lead zirconate titanate (PZT). Materials 2016, 9: 945.
[120]
Li JW, Liu YX, Thong HC, et al. Effect of ZnO doping on (K,Na)NbO3-based lead-free piezoceramics: Enhanced ferroelectric and piezoelectric performance. J Alloys Compd 2020, 847: 155936.
[121]
Zhao ZH, Lv YK, Dai YJ, et al. Ultrahigh electro-strain in acceptor-doped KNN lead-free piezoelectric ceramics via defect engineering. Acta Mater 2020, 200: 35–41.
[122]
Höfling M, Zhou XD, Riemer LM, et al. Control of polarization in bulk ferroelectrics by mechanical dislocation imprint. Science 2021, 372: 961–964.
[123]
Waqar M, Wu HJ, Ong KP, et al. Origin of giant electric-field-induced strain in faulted alkali niobate films. Nat Commun 2022, 13: 3922.
[124]
Liu HJ, Wu HJ, Ong KP, et al. Giant piezoelectricity in oxide thin films with nanopillar structure. Science 2020, 369: 292–297.