1. 毕业设计（论文）的内容和要求
本课题将通过溶胶凝胶法来制备钛酸铋钠(BNT)无铅铁电薄膜，通过前驱体溶液的合成和调整，热处理制度的探索以及退火处理，从而合成出无组分偏差，纯相且致密的BNT薄膜。
同时通过对薄膜的物相，形貌和性能进行测试，确定最佳的工艺路线和参数，并对薄膜的性能进行合理分析。
最后把整个研究内容写成毕业论文。
2. 参考文献
根据毕业要求指点10.3，毕设期间要进行研究现状调查与总结，要求在开题报告及毕业设计（论文）中涉及的英文文献不少于20篇，其中近5年不少于8篇，英文文献不少于5篇。
以下是与本课题相关的部分文献列表：[1] NAGARAJAN V, ROYTBURD A, STANISHEVSKY A, et al. Dynamics of ferroelastic domains in ferroelectric thin films [J]. Nat Mater, 2003, 2(1): 43-7.[2] ZHOU Z H, XUE J M, LI W Z, et al. Leakage current and charge carriers in (Na0.5Bi0.5)TiO3 thin film [J]. Journal of Physics D: Applied Physics, 2005, 38(4): 642-8.[3] YU T, KWOK K W, CHAN H L W. Preparation and properties of solgel-derived Bi0.5Na0.5TiO3 lead-free ferroelectric thin film [J]. Thin Solid Films, 2007, 515(7-8): 3563-6.[4] KUNEJ , VEBER A, SUVOROV D, et al. Sol-Gel Synthesis and Characterization of Na0.5Bi0.5TiO3-NaTaO3 Thin Films [J]. Journal of the American Ceramic Society, 2013, n/a-n/a.[5] ETINC T, SPREITZER M, KUNEJ , et al. Temperature Stable Dielectric Behavior of Sol-Gel Derived Compositionally Graded SrTiO3/Na0.5Bi0.5TiO3/SrTiO3 Thin Films [J]. Journal of the American Ceramic Society, 2013, 96(11): 3511-7.[6] LEE Y-S, SEO I-T, KIM B-Y, et al. Electrical Properties of a 0.95(Na0.5K0.5)NbO3 -0.05 CaTiO3 Thin Film Grown on a Pt/Ti/SiO2/Si Substrate [J]. Journal of the American Ceramic Society, 2014, 97(9): 2892-6.[7] LI M, PIETROWSKI M J, DE SOUZA R A, et al. A family of oxide ion conductors based on the ferroelectric perovskite Na0.5Bi0.5TiO3 [J]. Nat Mater, 2014, 13(1): 31-5.[8] ZHAO Y, HAO X, LI M. Dielectric properties and energy-storage performance of (Na0.5Bi0.5)TiO3 thick films [J]. Journal of Alloys and Compounds, 2014, 601(112-5).[9] CUI W, WANG X, LI L. Large piezoresponse of Na0.5Bi0.5TiO3K0.5Bi0.5TiO3 thin films prepared via water-based solgel method [J]. Ceramics International, 2015, 41(S37-S40).[10] GENENKO Y A, GLAUM J, HOFFMANN M J, et al. Mechanisms of aging and fatigue in ferroelectrics [J]. Materials Science and Engineering: B, 2015, 192(52-82).[11] LI P, LI W, ZENG H, et al. Ferroelectric and piezoelectric properties of La-modified lead-free (Bi0.5Na0.5)TiO3(Bi0.5K0.5)TiO3SrTiO3 thin films [J]. Ceramics International, 2015, 41(3): 4479-86.[12] XU Z, HAO X, AN S. Dielectric properties and energy-storage performance of (Na0.5Bi 0.5) TiO3 -SrTiO3 thick films derived from polyvinylpyrrolidone-modified chemical solution [J]. Journal of Alloys and Compounds, 2015, 639(387-92).[13] CAO W P, LI W L, DAI X F, et al. Large electrocaloric response and high energy-storage properties over a broad temperature range in lead-free NBT-ST ceramics [J]. Journal of the European Ceramic Society, 2016, 36(3): 593-600.[14] WANG J, SUN N, LI Y, et al. Effects of Mn doping on dielectric properties and energy-storage performance of Na0.5Bi0.5TiO3 thick films [J]. Ceramics International, 2017, 43(10): 7804-9.[15] DARGHAM S A, PONCHEL F, ABBOUD N, et al. Synthesis and electrical properties of lead-free piezoelectric Bi0.5Na0.5TiO3 thin films prepared by Sol-Gel method [J]. Journal of the European Ceramic Society, 2018, 38(4): 1450-5.[16] HAN Y J, WANG Y Z, YANG C H, et al. Compensation for volatile elements to modify the microstructure and energy storage performance of (W,Ni)-codoped Na0.5Bi0.5TiO3 ceramic films [J]. Ceramics International, 2018, 44(13): 15153-9.[17] WU S, CHEN P, ZHAI J, et al. Enhanced piezoelectricity and energy storage performances of Fe-doped BNTBKTST thin films [J]. Ceramics International, 2018, 44(17): 21289-94.[18] YANG C H, YAO Q, QIAN J, et al. Growth, microstructure, energystorage and dielectric performances of chemicalsolution NBTbased thin films: Effect of sodium nonstoichimometry [J]. Ceramics International, 2018, 44(8): 9152-8.[19] DONG G, LI S, YAO M, et al. Super-elastic ferroelectric single-crystal membrane with continuous electric dipole rotation [J]. Science, 2019, 366(6464): 475-9.[20] HAN Y, QIAN J, YANG C. Fatigue-free dielectric capacitor with giant energy density based on lead-free Na0.5Bi0.5TiO3-based film [J]. Journal of Materials Science: Materials in Electronics, 2019, 30(24): 21369-76.[21] HUANG W, THATIKONDA S K, KE Y, et al. High-recoverable energy-storage density and dielectric tunability in Eu3 -doped NBT-xSTO binary solid solution films [J]. Journal of the American Ceramic Society, 2019, 103(2): 999-1009.[22] LEE H-Y, LIU L, LUO J, et al. Thickness-dependent switching behavior of 0.8(Bi0.5Na0.5)TiO3 -0.2SrTiO3 lead-free piezoelectric thin films [J]. Ceramics International, 2019, 45(13): 16022-7.[23] SALAZAR N, P REZ‐MEZCUA D, CALZADA M L, et al. Ergodicity of fine-grained canonical relaxor ferroelectric (Bi0.5Na0.5)1- xBaxTiO3 films [J]. Journal of the American Ceramic Society, 2019, 102(10): 5941-51.[24] YANG C, LV P, QIAN J, et al. Fatigue‐Free and Bending-Endurable Flexible Mn-Doped Na0.5Bi0.5TiO3-BaTiO3-BiFeO3 Film Capacitor with an Ultrahigh Energy Storage Performance [J]. Advanced Energy Materials, 2019, 9(18): 1803949.[25] YANG L, KONG X, LI F, et al. Perovskite lead-free dielectrics for energy storage applications [J]. Progress in Materials Science, 2019, 102(72-108).[26] ZOU K, DAN Y, XU H, et al. Recent advances in lead-free dielectric materials for energy storage [J]. Materials Research Bulletin, 2019, 113(190-201).
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