[1] FURUKAWA T, ISHIDA K, FUKADA E. Piezoelectric properties in the composite systems of polymers and PZT ceramics[J]. J. Appl. Phys, 50, 4904(1979).

[2] WU J, XIAO D, ZHU J. Potassium-sodium niobate lead-free piezoelectric materials: past, present, and future of phase boundaries[J]. Chem. Rev, 115, 2559(2015).

[3] BENECH P, DUCHAMP J M. Piezoelectric materials and their applications in radio frequency domain and telecommunications[J]. Adv. Appl. Ceram, 114, 220(2015).

[4] GUO R, CROSS L E, PARK S E et al. Origin of the high piezoelectric response in PbZr_1-xTi_xO₃[J]. Phys. Rev. Lett, 84, 5423(2000).

[5] YAN Y, CHO K H, PRIYA S. Role of secondary phase in high power piezoelectric PMN-PZT ceramics[J]. J. Am. Ceram. Soc, 94, 4138(2011).

[6] GRINBERG I, SUCHOMEL M R, DAVIES P K et al. Predicting morphotropic phase boundary locations and transition temperatures in Pb- and Bi-based perovskite solid solutions from crystal chemical data and first-principles calculations[J]. J. Appl. Phys, 98, 094111(2005).

[7] REMA K P, KUMAR V. Structure-property relationship in Mn-doped (Pb_0.94Sr_0.06)(Zr_0.53Ti_0.47)O₃[J]. J. Am. Ceram. Soc, 91, 164(2008).

[8] YU X, HOU Y, ZHAO H et al. Refreshing doping concept in perovskite piezoceramics: composite modulation hidden behind lattice substitution[J]. J. Am. Ceram. Soc, 103, 6378(2020).

[9] QUANG D A, VUONG L D. Enhanced piezoelectric properties of Fe₂O₃ and Li₂CO₃ co-doped Pb[(Zr_0.48Ti_0.52)_0.8(Zn_1/3Nb_2/3)_0.125(Mn_1/3Nb_2/3)_0.075]O₃ ceramics for ultrasound transducer applications[J]. J. Sci-Adv. Mater. Dev, 7, 100436(2022).

[10] ZHENG M, HOU Y, ZHU M et al. Nanodomains in metal/ferroelectric 0-3 type composites: on the origin of the strong piezoelectric effec[J]. Scripta. Mater, 145:, 19(2018).

[11] YU X, HOU Y, ZHAO H et al. The role of secondary phase in enhancing transduction coefficient of piezoelectric energy harvesting composites[J]. J. Mater. Chem. C, 7, 3479(2019).

[12] KIM S W, LEE H C. Development of PZN-PMN-PZT piezoelectric ceramics with high d₃₃ and Q_m values[J]. Materials, 15, 7070(2022).

[13] LIU Q, SUN Q, MA W et al. Large-strain 0.7Pb(Zr_xTi_1-x)O₃- 0.1Pb(Zn_1/3Nb_2/3)O₃-0.2Pb(Ni_1/3Nb_2/3)O₃ piezoelectric ceramics for high-temperature application[J]. J. Eur. Ceram. Soc, 34, 1181(2014).

[14] XU X, FENG X, ZHOU L et al. Phase structure and electrical properties of 0.28PIN-0.32PZN-(0.4-x)PT-xPZ piezoelectric ceramics[J]. Crystals, 13, 1362(2023).

[15] WANG H, ZENG K. Humidity effects on domain structure and polarization switching of Pb(Zn_1/3Nb_2/3)O₃-x%PbTiO₃ (PZN-x%PT) single crystals[J]. Materials, 14, 2447(2021).

[16] DU J, YANG C, LI Y et al. Microstructural, dielectric, piezoelectric and ferroelectric properties of xPZN-PZT ternary ceramics[J]. J. Mater. Sci-Mater. El, 34, 780(2023).

[17] SUCHOMEL M R, FOGG A M, ALLIX M et al. Bi₂ZnTiO₆: a lead-free closed-shell polar perovskite with a calculated ionic polarization of 150 μC·cm^-2[J]. Chem. Mater, 18, 4987(2006).

[18] YAN Y, CHO K H, PRIYA S. Identification and effect of secondary phase in MnO₂-doped 0.8Pb(Zr_0.52Ti_0.48)O₃-0.2Pb(Zn_1/3Nb_2/3)O₃ piezoelectric ceramics[J]. J. Am. Ceram. Soc, 94, 3953(2011).

[19] CAO W W, RANDALL C A. Grain size and domain size relations in bulk ceramic ferroelectric materials[J]. J. Phys. Chem. Solids, 57, 1499(1996).

[20] LI F, ZHANG S, XU Z et al. Piezoelectric activity of relaxor- PbTiO₃ based single crystals and polycrystalline ceramics at cryogenic temperatures: intrinsic and extrinsic contributions[J]. Appl. Phys. Lett, 96, 192903(2010).

[21] LI F, ZHANG S, XU Z et al. Composition and phase dependence of the intrinsic and extrinsic piezoelectric activity of domain engineered (1-x)Pb(Mg_1/3Nb_2/3)O₃-xPbTiO₃ crystals[J]. J. Appl. Phys, 108, 034106(2010).

[22] ZHENG L, YI X, ZHANG S et al. Complete set of material constants of 0.95(Na_0.5Bi_0.5)TiO₃-0.05BaTiO₃ lead-free piezoelectric single crystal and the delineation of extrinsic contributions[J]. Appl. Phys. Lett, 103, 122905(2013).

[23] LI L, ZHANG J, WANG R X et al. Thermally-stable large strain in Bi(Mn_0.5Ti_0.5)O₃ modified 0.8Bi_0.5Na_0.5TiO₃-0.2Bi_0.5K_0.5TiO₃ ceramics[J]. J. Eur. Ceram. Soc, 39, 1827(2019).

[24] LI L, ZHU M, WEI Q et al. Microstructure and suppressed thermal depolarisation behaviours of lead-free Na_0.5Bi_0.5TiO₃:ZnO ferroelectric composite ceramics[J]. Adv. Appl. Ceram, 117, 133(2017).

[25] WANG S, LI X, WANG J et al. Enhanced electromechanical properties in MnCO₃-modified Pb(Ni,Nb)O₃-PbZrO₃-PbTiO₃ ceramics via defect and domain engineering[J]. J. Am. Ceram. Soc, 106, 1970(2022).

[26] LU X M, HUANG F Z, ZHU J S. Domains in ferroelectrics: formation, structure, mobility and related properties[J]. Acta Phys. Sin, 69, 127704(2020).

[27] XUE H, ZHENG T, WU J. Understanding the nature of temperature stability in potassium sodium niobate based ceramics from structure evolution under external field[J]. ACS Appl. Mater. Inter, 12, 32925(2020).

[28] LIU Y X, LI Z, THONG H C et al. Grain size effect on piezoelectric performance in perovskite-based piezoceramics[J]. Acta Phys. Sin, 69, 217704(2020).

[29] LI F, ZHANG S, YANG T et al. The origin of ultrahigh piezoelectricity in relaxor-ferroelectric solid solution crystals[J]. Nat. Commun, 7:, 13807(2016).

[30] LI F, ZHANG S, DAMJANOVIC D et al. Local structural heterogeneity and electromechanical responses of ferroelectrics: learning from relaxor ferroelectrics[J]. Adv. Funct. Mater, 28, 1801504(2018).