Wilson SA, Jourdain RPJ, Zhang Q, et al. New materials for micro-scale sensors and actuators. Mat Sci Eng R 2007, 56: 1–129.
Fan PY, Liu K, Ma WG, et al. Progress and perspective of high strain NBT-based lead-free piezoceramics and multilayer actuators. J Materiomics 2021, 7: 508–544.
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.
Wang K, Li JF. (K,Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement. J Adv Ceram 2012, 1: 24–37.
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.
Kim SW, Lee TG, Kim DH, et al. Thermally stable large strain in low-loss (Na0.2K0.8)NbO3–BaZrO3 for multilayer actuators. J Am Ceram Soc 2019, 102: 6837–6849.
Seo IT, Kang IY, Cha YJ, et al. Piezoelectric properties of CuO-added (Na0.5K0.5)NbO3 ceramic multilayers. J Eur Ceram Soc 2012, 32: 1085–1090.
Gao RL, Chu XC, Huan Y, et al. Ceramic–electrode inter-diffusion of (K,Na)NbO3-based multilayer ceramics with Ag0.7Pd0.3 electrode. J Eur Ceram Soc 2015, 35: 389–392.
Gao LS, Guo HZ, Zhang SJ, et al. Base metal co-fired multilayer piezoelectrics. Actuators 2016, 5: 8.
Sato S, Nakano Y, Sato A, et al. Mechanism of improvement of resistance degradation in Y-doped BaTiO3 based MLCCs with Ni electrodes under highly accelerated life testing. J Eur Ceram Soc 1999, 19: 1061–1065.
Waser R. Bulk conductivity and defect chemistry of acceptor-doped strontium titanate in the quenched state. J Am Ceram Soc 1991, 74: 1934–1940.
Waser R, Baiatu T, Härdtl KH. DC electrical degradation of perovskite-type titanates: I, Ceramics. J Am Ceram Soc 1990, 73: 1645–1653.
Yamamatsu J, Kawano N, Arashi T, et al. Reliability of multilayer ceramic capacitors with nickel electrodes. J Power Sources 1996, 60: 199–203.
Wang XZ, Huan Y, Wang ZX, et al. Electrical conduction and dielectric relaxation mechanisms in the KNN-based ceramics. J Appl Phys 2019, 126: 104101.
Wang ZX, Huan Y, Feng Y, et al. Design of p-type NKN-based piezoelectric ceramics sintered in low oxygen partial pressure by defect engineering. J Am Ceram Soc 2020, 103: 3667–3675.
Huan Y, Wang XH, Wei T, et al. Defect control for enhanced piezoelectric properties in SnO2 and ZrO2 co-modified KNN ceramics fired under reducing atmosphere. J Eur Ceram Soc 2017, 37: 2057–2065.
Huan Y, Wang XJ, Yang WY, et al. Optimizing energy harvesting performance by tailoring ferroelectric/relaxor behavior in KNN-based piezoceramics. J Adv Ceram 2022, 11: 935–944.
Kawada S, Kimura M, Higuchi Y, et al. (K,Na)NbO3-based multilayer piezoelectric ceramics with nickel inner electrodes. Appl Phys Express 2009, 2: 111401.
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.
Gao LS, Ko SW, Guo HZ, et al. Demonstration of copper co-fired (Na,K)NbO3 multilayer structures for piezoelectric applications. J Am Ceram Soc 2016, 99: 2017–2023.
Kim DH, Joung MR, Seo IT, et al. Influence of sintering conditions on piezoelectric properties of KNbO3 ceramics. J Eur Ceram Soc 2014, 34: 4193–4200.
Park HY, Seo IT, Choi JH, et al. Low-temperature sintering and piezoelectric properties of (Na0.5K0.5)NbO3 lead-free piezoelectric ceramics. J Am Ceram Soc 2010, 93: 36–39.
Cen ZY, Yu Y, Zhao PY, et al. Grain configuration effect on the phase transition, piezoelectric strain and temperature stability of KNN-based ceramics. J Mater Chem C 2019, 7: 1379–1387.
Malič B, Razpotnik H, Koruza J, et al. Linear thermal expansion of lead-free piezoelectric K0.5Na0.5NbO3 ceramics in a wide temperature range. J Am Ceram Soc 2011, 94: 2273–2275.
Zhang HB, Ma WG, Xie B, et al. (Na1/2Bi1/2)TiO3-based lead-free co-fired multilayer actuators with large strain and high fatigue resistance. J Am Ceram Soc 2019, 102: 6147–6155.
Zuo RZ, Li LT, Gui ZL, et al. Vapor diffusion of silver in cofired silver/palladium–ferroelectric ceramic multilayer. Mat Sci Eng B 2001, 83: 152–157.
Long DM, Klein A, Dickey EC. Barrier formation at BaTiO3 interfaces with Ni and NiO. Appl Surf Sci 2019, 466: 472–476.
Shannon RD. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr A 1976, 32: 751–767.
Green DJ, Guillon O, Rödel J. Constrained sintering: A delicate balance of scales. J Eur Ceram Soc 2008, 28: 1451–1466.
Wang G, Lu ZL, Li Y, et al. Electroceramics for high-energy density capacitors: Current status and future perspectives. Chem Rev 2021, 121: 6124–6172.
Malik RA, Hussain A, Maqbool A, et al. Temperature-insensitive high strain in lead-free Bi0.5(Na0.84K0.16)0.5TiO3–0.04SrTiO3 ceramics for actuator applications. J Am Ceram Soc 2015, 98: 3842–3848.
Chen J, Du ZZ, Yang YT, et al. The electrical properties of low-temperature sintered 0.07Pb(Sb1/2Nb1/2)O3–0.93Pb (ZrxTi1−x)O3 multilayer piezoceramic actuator. Ceram Int 2021, 47: 15195–15201.
Chae SJ, Lee TG, Kim DS, et al. Superior piezoelectric properties of lead-free thick-films and their application to alternative multilayer actuator. J Alloys Compd 2020, 834: 155079.
Kang JK, Han HS, Jeong SK, et al. Microwave and conventional sintering of lead-free (K,Na)NbO3-based piezoelectric ceramic multilayer actuators. J Ceram Process Res 2013, 14: 230–233.
Kim MS, Jeon S, Lee DS, et al. Lead-free NKN–5LT piezoelectric materials for multilayer ceramic actuator. J Electroceram 2009, 23: 372–375.
Lee JS, Jeong SK, Nguyen VQ, et al. Fabrication of (K0.47Na0.51Li0.02)(Nb0.8Ta0.2)O3 multilayer ceramic actuators with AgPd–ceramic composite inner electrode. Ferroelectrics 2011, 422: 77–80.
Hussain F, Khesro A, Lu ZL, et al. Lead free multilayer piezoelectric actuators by economically new approach. Front Mater 2020, 7: 87.
Hatano K, Yamamoto A, Kishimoto S, et al. Investigation of displacement property and electric reliability of (Li,Na,K)NbO3-based multilayer piezoceramics. Jpn J Appl Phys 2016, 55: 10TD03.