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A review of flexible perovskite oxide ferroelectric films and their application

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Journal of Materiomics 2020年第1期6卷 1-16页

作者： Wenxiu Gao Yi Zhu yaojin wang Guoliang Yuan Jun-Ming Liu School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094China Laboratory of Solid State Microstructure and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

Many perovskite oxide ferroelectrics(***_(1-x)Ti_(x)O_(3),BaTiO_(3),LiNbO_(3))are born with multitudinous robust performances and have been widely used in sensors,actuators,surface acoustic wave devices,and memories et ***,their hardness,brittleness and harsh synthesis conditions(*** temperature and oxygen ambience)restrain their application into flexible electronic devices which are significant components among the three pillars of modern society development,***,information and *** we review the preparation of flexible devices based on these oxide ferroelectrics,including transferring these freestanding films to flexible substrates after separating ferroelectric oxide films from the hard substrates,such as Si and SrTiO_(3) crystals,and also direct fabrication methods without transferring ***,we summarize three kinds of representative flexible devices,*** ferroelectric memories,sensors and *** inorganic electronics not only show excellent electric properties competitive with those corresponding electronics on hard substrates but also exhibit good flexibility similar to many organic flexible electronics.

关键词： Perovskite oxides Flexible devices Sensors Energy harvesters Memories

Magnetoelectric and converse magnetoelectric responses in Tb_xDy_(1-x)Fe_(2-y) alloy & Pb(Mg_(1/3)Nb_(2/3))_(1-x)Ti_xO_3 crystal laminated composites

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Chinese Science Bulletin 2008年第14期53卷 2129-2134页

作者： JIA YanMin LUO HaoSu OR Siu Wing wang yaojin CHAN Helen L W State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 201800 China Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China

Measured results of magnetoelectric (ME) and converse magnetoelectric (CME) effects of TbxDy1-xFe2-y/ Pb(Mg1/3Nb2/3)(1-x)TixO3/TbxDy1-xFe2-y (TD/PMNT/TD) and PMNT/TD/PMNT laminated composites are pre- sented. ME effect was determined by measuring laminate voltage output under a Helmholtz-gener- ated AC field biased by a DC field (0―1 kOe) (1 Oe = 79.58 A/m). The CME effect was measured by re- cording the voltage induced in a solenoid encompassing the ME sample while exposed to a DC bias field and PMNT layer driven by a 10 V AC source. The ME and CME responses in the two laminated structure are linear. The highest values of ME coefficients in TD/PMNT/TD and PMNT/TD/PMNT com- posites are 384 mV/Oe and 158 mV/Oe, respectively, while the highest values of CME coefficients in the two composites are 118 mG/V and 162 mG/V (1 G=10-4 T), respectively.

关键词：磁电效应压电性复合材料合金晶体结构

Toward artificial intelligent self-cooling electronic skins:Large electrocaloric effect in all-inorganic flexible thin films at room temperature

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Journal of Materiomics 2019年第1期5卷 66-72页

作者： Ding wang Xin Chen Guoliang Yuan Yanmin Jia Yiping wang Arif Mumtaz yaojin wang Jun-Ming Liu School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094JiangsuChina Department of Physics Zhejiang Normal UniversityJinhua321004China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Physics Quaid-i-Azam UniversityIslamabadPakistan National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China

Intelligent robots have assisted mankind in achieving and operating thousands of functions,especially with the arrival of the artificial ***,heat dissipation and thermal management in the intelligent robots remain big challenges,which limit their miniaturization and ***(EC)materials,which exhibit temperature change in response to the application or withdrawal of an electric field,open a new strategy for cooling technology and have gained a flurry of research interest in recent *** artificial intelligent self-cooling electronic skins,large-scale flexible materials with high EC effect near room temperature are in ***,we report a large room temperature EC effect in flexible Pb_(0.82)Ba_(0.08)La_(0.1)Zr0.9Ti_(0.1)O_(3)(PBLZT)inorganic thin films via a transfer-free cost-effective sol-gel process,assisted by unique two-dimensional mica *** maximum adiabatic temperature change and isothermal entropy change of the flexible PBLZT thin films reach to 22.5 K and 25.9 J K^(-1) kg^(-1) at room *** particular,the flexible PBLZT thin films exhibit a stable EC effect both under bending state and after bending for 20000 *** flexible EC materials offer an alternative strategy to the development of cooling technologies for both artificial intelligent robots and personal wearable cooling devices.

关键词： Electrocaloric effect Ferroelectric thin film Flexible electronics Mica Wearable device

Eu-doped K_(0.5)Na_(0.5)NbO_(3)-(Ba,Sr)TiO_(3):A novel lead-free luminescent ferroelectric transparent ceramic with reversible photochromism

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Journal of Advanced Dielectrics 2019年第5期9卷 49-56页

作者： Jinfeng Lin Xiao Wu Cong Lin Tengfei Lin yaojin wang College of Materials Science and Engineering Fuzhou University Fuzhou 350108P.R.China School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 P.R.China

Photochromic(PC)luminescent ferroelectric materials have aroused great interest because of their potential applications in optical information memories,optical switches and ***,those materials are basically *** this work,we prepared a PC luminescent K_(0.5)Na_(0.5)NbO_(3)-(Ba,Sr)TiO_(3)-based ferroelectric transparent ceramic by modifying with Eu^(3+),Ba^(2+,)Ti^(4+)and Sr^(2+),which not only have good optical transmittances(-60%at 900 nm),moderate ferroelectric properties and down-conversion photo-luminescence(PL)properties,but also exhibit reversible PC *** the illumination by xenon lamp,the colors of the ceramics change from pale green to gray,and then reversibly recover to their initial state via thermal stimulus(200℃for 10 min).Interestingly,both the optical transmittances and PL intensities can be effectively tailored by controlling the PC reaction *** results suggest that the ferroelectric transparent ceramics are promising for the modulation of photoenergy and the design of optoelectronic devices.

关键词： Ferroelectric ceramics optical transmittance Eu-KNNBST photochromism photoluminescence

Bio-inspired flexible vibration visualization sensor based on piezo-electrochromic effect

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Journal of Materiomics 2020年第4期6卷 643-650页

作者： Xuan Chen Laihui Luo Zhou Zeng Jie Jiao Mudassar Shehzad Guoliang Yuan Haosu Luo yaojin wang School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094JiangsuChina Department of Microelectronic Science and Engineering Ningbo UniversityNingbo315211China Shanghai Institute of Ceramics Chinese Academy of Sciences215 Chengbei RoadJiadingShanghai201800China

Monitoring structural vibration can provide quantitative information for both structural health evaluations and early-warning *** most classic vibration-based structural health monitoring is equipped with piezoelectric accelerometers,which is expensive and inconvenient due to cumbersome and time-consuming sensor installation and high power-consumptive data acquisition *** other main challenge with these systems is the inherent limitations for multi-point monitoring in critical elements with curvature due to their ***,inspired by the chameleon,we report a cost-effective,flexible and conformal,self-powered vibration sensor based on elasto-electro-chemical synergistic effect of piezoelectricity and *** sensor can provide not only in-situ visualization,but also ex-situ recording of structural vibration due to the non-volatile color memory effect of *** passive sensor system is composed of two distinct electronic components d ternary Pb(In1/2Nb1/2)O_(3)ePb(Mg1/3Nb2/3)O_(3)ePbTiO_(3)piezoelectric single crystal ribbon sensors and a solid-state tungsten trioxide electrochromic indicator driven by vibration-induced voltage generated by the piezoelectric *** proposed piezo-electrochromic based passive non-volatile visualization sensor may find diverse applications in structural health monitoring,smart wallpapers,and medical injury rehabilitation.

关键词： Piezoelectric Ferroelectric single crystals Flexible electronics Vibration sensor Electrochromic

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柔性压电材料及器件应用

硅酸盐学报 2022年第3期50卷 625-641页

作者：刘洋汪尧进南京理工大学材料科学与工程学院南京210094

压电材料由于其独特的机电耦合特性而被广泛应用到传感器和制动器等设备中。柔性电子技术是未来智能技术的重要支撑,然而,压电材料难以同时兼具柔性和高压电性能,这限制了压电材料在柔性电子领域的应用。总结了目前可用的柔性压电材料... 详细信息

压电材料由于其独特的机电耦合特性而被广泛应用到传感器和制动器等设备中。柔性电子技术是未来智能技术的重要支撑,然而,压电材料难以同时兼具柔性和高压电性能,这限制了压电材料在柔性电子领域的应用。总结了目前可用的柔性压电材料及其设计和制备方法,随后系统的总结了柔性压电材料在压力传感、能量收集和生物医学等方面的应用,最后评述了柔性压电材料发展的挑战和前景展望。

关键词：压电材料柔性电子技术压力传感器能量收集

(Pb_(0.97)La_(0.02))(Zr_(0.6)Sn_(0.4))O_(3)反铁电陶瓷的介电储能性能

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硅酸盐学报 2024年第4期52卷 1211-1216页

作者：张楠张骥汪尧进南京理工大学材料科学与工程学院南京210094

电介质电容器具有超高的功率密度和超快的充放电速率,因而在脉冲功率技术中具有应用前景。利用固相法制备了(Pb_(0.97)La_(0.02))(Zr_(0.6)Sn_(0.4))O_(3)(PLZS)反铁电陶瓷,研究了不同烧结温度下PLZS陶瓷的晶体结构、微观形貌、介电性... 详细信息

电介质电容器具有超高的功率密度和超快的充放电速率,因而在脉冲功率技术中具有应用前景。利用固相法制备了(Pb_(0.97)La_(0.02))(Zr_(0.6)Sn_(0.4))O_(3)(PLZS)反铁电陶瓷,研究了不同烧结温度下PLZS陶瓷的晶体结构、微观形貌、介电性能、反铁电及储能性能。结果表明,不同温度烧结的样品均具有正交钙钛矿结构,且随着烧结温度的升高,陶瓷的致密度逐渐提高、晶粒尺寸也逐渐增大。因此,最佳温度下(1225℃)烧结的陶瓷具有最佳的储能性能,可回收能量密度密度约13.3 J/cm^(3),储能效率约83.6%。

关键词：固相法反铁电陶瓷介电性能储能性能

Domain size and charge defects affecting the polarization switching of antiferroelectric domains

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Chinese Physics B 2023年第4期32卷 652-656页

作者：朱静浩刘震钟柏仪汪尧进胥柏香 Nanjing Research Institute of Electronics Technology Nanjing 210039China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Mechanics of Functional Materials Department of Materials ScienceTechnical University of DarmstadtDarmstadt 64287Germany

The switching behavior of antiferroelectric domain structures under the applied electric field is not fully *** this work,by using the phase field simulation,we have studied the polarization switching property of antiferroelectric *** results indicate that the ferroelectric domains nucleate preferably at the boundaries of the antiferroelectric domains,and antiferroelectrics with larger initial domain sizes possess a higher coercive electric field as demonstrated by hysteresis ***,we introduce charge defects into the sample and numerically investigate their *** is also shown that charge defects can induce local ferroelectric domains,which could suppress the saturation polarization and narrow the enclosed area of the hysteresis *** results give insights into understanding the antiferroelectric phase transformation and optimizing the energy storage property in experiments.

关键词： antiferroelectric domains phase field simulation domain size charge defects

浓度梯度掺杂实现BiFeO_(3)薄膜自极化

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无机材料学报 2024年第1期39卷 99-106,I0006,I0007页

作者：戴乐刘洋高轩王书豪宋雅婷唐明猛 DMITRY V Karpinsky 刘丽莎汪尧进南京理工大学材料科学与工程学院南京210094 白俄罗斯国家科学院材料科学与应用研究中心白俄罗斯明斯克220072

BiFeO_(3)是一种非常有前途的无铅铁电材料,与大多数传统铁电材料相比,它具有更大的极化和更高的居里温度,为高温应用提供了可能。受到衬底强烈的夹持效应、较大的矫顽场和漏电流的影响,BiFeO_(3)薄膜难以被极化。自极化是解决这一问题... 详细信息

BiFeO_(3)是一种非常有前途的无铅铁电材料,与大多数传统铁电材料相比,它具有更大的极化和更高的居里温度,为高温应用提供了可能。受到衬底强烈的夹持效应、较大的矫顽场和漏电流的影响,BiFeO_(3)薄膜难以被极化。自极化是解决这一问题的可行方法。本研究采用溶胶-凝胶法在Pt(111)/Ti/SiO_(2)/Si衬底上生长了BiFeO_(3)薄膜,向上梯度薄膜(从衬底BiFeO_(3)过渡到薄膜表面Bi_(0.80)Ca_(0.20)FeO_(2.90))以及向下梯度薄膜(从衬底Bi_(0.80)Ca_(0.20)FeO_(2.90)过渡到薄膜表面BiFeO_(3))。通过细致地调控薄膜内部缺陷的定向分布形成内置电场,从而导致薄膜具有自极化特性。压电力显微镜结果表明:在BiFeO_(3)薄膜中,Ca的梯度方向可以调控自极化的方向。此外,类似二极管的单向导通特性验证了薄膜的自极化是由Ca的浓度梯度掺杂导致。X射线光电子能谱结果表明,氧空位的梯度分布导致的内置电场可能是造成自极化现象的原因。本研究为实现铁电薄膜的自极化提供了一种新的策略,并在以自极化的内置电场为驱动,提高光伏或光敏器件性能方面具有潜在的应用前景。

关键词：自极化梯度掺杂铁酸铋薄膜溶胶-凝胶法