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Superior piezoelectric performance with high operating temperature in bismuth ferrite-based ternary ceramics

Journal of Materials Science & Technology 2024年第2期169卷 172-181页

作者： yunyao huang Leiyang Zhang Ruiyi Jing Yang Yang Vladimir Shur Xiaoyong Wei Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg620000Russia

Due to the thermal depolarization effect,adequate piezoelectric performance with high operating temperature is regarded to be challenging to accomplish concurrently in piezoceramics for applications in specific piezoelectric *** this work,we synthesized(0.8−x)BiFeO_(3)-x PbTi_(3)-0.2Ba(Zr_(0.25)Ti_(0.75))O_(3)(abbreviated as BFO-x PT-BZT)ternary solid solutions with 0.15≤x≤0.30 by conventional solid-state reaction *** MPB composition with a coexisting state of rhombohedral-tetragonal phases exhibits enhanced electromechanical properties,including Curie temperature of 380℃,large-signal equivalent piezoelectric coefficient d^(∗)_(33)of 395 pm V^(-1),small-signal piezoelectric coefficient d_(33)of 302 pC N^(-1),and electromechanical coupling factor k_(p)of 50.2%,which is comparable to commercial PZT-5A ceramics,indicating potential in high-temperature ***,in-situ X-ray diffraction(XRD)and piezoelectric force microscopic(PFM)techniques demonstrate that multiphase coexistence and complex nanodomains promote piezoelectric response via *** x=0.24 composition exhibits the highest in-situ d_(33)of 577 pC N^(-1)and good temperature stability in 30−280℃,indicating that BZT-modified BFO-PT ceramics are promising candidates for high-temperature piezoelectric devices.

关键词： High-temperature piezoelectrics Morphotropic phase boundary In-situ technique Domain structure BFO

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Ferroelectric-to-relaxor transition and ultrahigh electrostrictive effect in Sm^(3+)-doped Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)ferroelectrics ceramics

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Journal of Materials Science & Technology 2023年第34期165卷 75-84页

作者： yunyao huang Leiyang Zhang Wenjing Shi Qingyuan Hu Vladimir Shur Xiaoyong Wei Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg 620000Russia

Rare-earth Sm^(3+)-doped Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.25PbTiO_(3)(PMN-0.25PT)ferroelectric ceramics with doping amounts between 0%-3%were developed via a conventional solid-state *** doping effect of Sm^(3+)ions on the PMN-0.25PT matrix was systematically investigated on the basis of the phase structure,temperature-dependent dielectric,ferroelectric,and electrotechnical *** to the disruption of long-range ferroelectric order,the addition of Sm^(3+)ions effectively lowers the Tm(temperature corresponding to maximum permittivity)of the samples,leading to enhanced relaxor ferroelectric(RFE)characteristic and superior electric field-induced strain(electrostrain)properties at room ***,a considerable large-signal equivalent piezoelectric coefficient d∗_(33)of 2376 pm/V and a very small hysteresis were attained in the PMN-0.25PT component doped with 2.5 mol.%Sm^(3+).The findings of piezoelectric force microscopy indicate that the addition of Sm^(3+)increases the local structural heterogeneity of the PMN-0.25PT matrix and that the enhanced electromechanical performance is due to the dynamic behavior of polar ***,strong temperature-dependent electrostrain and electrostrictive coefficient Q33 are observed in the critical region around Tm in all Sm^(3+)-modified PMN-0.25PT ceramic samples *** work elucidates the phase transition behavior of Sm^(3+)-doped PMN-0.25PT and reveals a critical region where electrostrictive properties can be greatly improved due to a strong temperature-dependent characteristic.

关键词： PMN-PT ceramics Sm^(3+)doping,Equivalent piezoelectric coefficient,Local structural heterogeneity,Electrostrictive effect

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Moderate Fields, Maximum Potential: Achieving High Records with Temperature‑Stable Energy Storage in Lead‑Free BNT‑Based Ceramics

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Nano-Micro Letters 2024年第5期16卷 184-200页

作者： Wenjing Shi Leiyang Zhang Ruiyi Jing yunyao huang Fukang Chen Vladimir Shur Xiaoyong Wei Gang Liu Hongliang Du Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials and Energy Southwest UniversityChongqing 400715People’s Republic of China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg 620000Russia Multifunctional Electronic Ceramics Laboratory College of EngineeringXi’an International UniversityXi’an 710077People’s Republic of China

The increasing awareness of environmental concerns has prompted a surge in the exploration of leadfree,high-power ceramic *** efforts to develop leadfree dielectric ceramics with exceptional energystorage performance(ESP)have predominantly relied on multicomponent composite strategies,often accomplished under ultrahigh electric ***,this approach poses challenges in insulation and system downsizing due to the necessary working voltage under such *** extensive study,bulk ceramics of(Bi_(0.5)Na_(0.5))TiO_(3)(BNT),a prominent lead-free dielectric ceramic family,have seldom achieved a recoverable energy-storage(ES)density(Wrec)exceeding 7 J cm^(−3).This study introduces a novel approach to attain ceramic capacitors with high ESP under moderate electric fields by regulating permittivity based on a linear dielectric model,enhancing insulation quality,and engineering domain structures through chemical formula *** incorporation of SrTiO_(3)(ST)into the BNT matrix is revealed to reduce the dielectric constant,while the addition of Bi(Mg_(2/3)Nb_(1/3))O_(3)(BMN)aids in maintaining ***,the study elucidates the methodology to achieve high ESP at moderate electric fields ranging from 300 to 500 kV cm^(−1).In our optimized composition,0.5(Bi_(0.5)Na_(0.4)K_(0.1))TiO_(3)–0.5(2/3ST-1/3BMN)(B-0.5SB)ceramics,we achieved a Wrec of 7.19 J cm^(−3) with an efficiency of 93.8%at 460 kV cm^(−1).Impressively,the B-0.5SB ceramics exhibit remarkable thermal stability between 30 and 140℃ under 365 kV cm^(−1),maintaining a Wrec exceeding 5 J cm^(−3).This study not only establishes the B-0.5SB ceramics as promising candidates for ES materials but also demonstrates the feasibility of optimizing ESP by modifying the dielectric constant under specific electric field ***,it provides valuable insights for the future design of ceramic capacitors with high ESP under constraints of limited electric field.

关键词： BNT Energy storage Lead-free Relaxor ferroelectrics Capacitors

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Dielectric and ferroelectric properties of CuO-doped lead magnesium niobate-based relaxor ferroelectric ceramics

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Journal of Advanced Dielectrics 2019年第4期9卷 54-62页

作者： Li Jin Jing Pang yunyao huang Wenting Luo Xu Lu Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric Research School of Electronic Science and Engineering Faculty of Electronic and Information Engineering Xi’an Jiaotong University Xi’an 710049P.R.China Laboratory of Functional Films School of Materials Science and Engineering Xi’an University of Technology Xi’an 710048 P.R.China

In this work,we report the dielectric and ferroelectric properties of CuO-doped(1-x)[0.5573Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.4427PbTiO_(3)]-xBa(Zn_(1/3)Nb_(2/3))_(3)(PMNT-xBZN)relaxor ferrielectric ceramic samples with x=0.1725,0.1925,02125 and 0.2325,which were fabricated by a conventional solid-state reaction *** introducing the CuO into PMNT-xBZN,the sintering temperature of this system is drastically lowered from 1280℃to 1120℃.The second pyrochlore phase,which is often generated during sintering at high temperature,is also ***,broad dielectric peaks with strong dielectric relaxation characteristics are observed from150℃to 100℃.Slim and slanted P-E hysteresis loops and purely electrostrictive strains with V-shape are obtained simultaneously in studied compositions from 30℃to 150℃.These results suggest that CuO could effectively lower the sintering temperature while maintaining the dielectric and ferroelectric properties of PMNT-xBZN relaxor ferroelectric ceramics.

关键词： Pb(Mg_(1/3)Nb_(2/3))O_(3)(PMN) relaxor ferroelectrics sintering additive ferroelectric electrostrain

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Enhanced antiferroelectric-like relaxor ferroelectric characteristic boosting energy storage performance of(Bi_(0.5)Na_(0.5))TiO_(3)-based ceramics via defect engineering

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Journal of Materiomics 2022年第3期8卷 527-536页

作者： Leiyang Zhang Ruiyi Jing yunyao huang Qingyuan Hu DOAlikin VYa Shur Jinghui Gao Xiaoyong Wei Ling Zhang Gang Liu Yan Yan Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an710049China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg620000Russia State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi'an710049China Chengdu Hongke Electronic Technology Co. LtdChengdu610100China School of Materials and Energy Southwest UniversityChongqing400715China

3Lead-free(BiasNaus)TiO_(3)(BNT)-based relaxor ferroelectric(RFE)ceramics have attracted a lot of atten-tion due to their high power density and rapid charge-discharge apabilities,as well as their potential application in pulse power ***,because of the desire for smaller electronic devices,their energy storage performance(ESP)should be enhanced even *** describe a defect engineering strategy for enhancing the antiferroelectric-like RFE feature of BNT-based ceramics by unequal substi-tution of rare-earth La^(3+)in this *** ESP of La^(3+)-doped samples is raised by 25%with the same synthetic procedure and thidkness,due to an inrease in the critical electric field(E-field)and saturated E-field during polarization response,which is induced by a modifiation in the energy barrier between the lattice *** impressively,an ultrahigh recoverable energy storage density Wrec of 8.58J/cm^(3)and a high energy storage efficiengyηof 945%are simultaneously attained in 3 at.%La^(3+)-substituted 0.6(Bi_(0.5)Na_(0.4)K_(0.1))_(1-1.5x)La_(x)TiO_(3)-0.4[2/3SrTiO_(3)-1/3Bi(Mg_(2/3)Ni_(1/3))O_(3)]RFE ceamics with good temperatue stability(W_(rec)=4.6±0.2 J/cm^(3)and higher n of 290%from 30℃to 120℃),frequency stability,and fatigue *** significant inrease in ESP achieved through defect engineering not only proves the effectiveness of our strategy,but also presents a novel dielectric material with potential applications in pulse power apacitors.

关键词： BNT Energy storage performance Relaxor ferroelectric Antiferroelectric-like

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Unveiling a giant electrocaloric effect at low electric fields through continuous phase transition design

Advanced Powder Materials

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Advanced Powder Materials 2024年第5期3卷 33-45页

作者： yunyao huang Leiyang Zhang Pingji Ge Ruiyi Jing Wenjing Shi Chao Li Xiang Niu Vladimir Shur Haibo Zhang Shengguo Lu Yintang Yang Dawei Wang Xiaoqin Ke Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an710049China School of Physics MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Jiaotong UniversityXi’an710049China Instrument Analysis Center Xi’an Jiaotong UniversityXi’an10049China Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg20000Russia School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan430074China School of Microelectronics Xidian UniversityXi’an710071China Functional Materials and Acousto-Optic Instruments Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin150080China

The reported electrocaloric(EC)effect in ferroelectrics is poised for application in the next generation of solidstate refrigeration technology,exhibiting substantial developmental *** study introduces a novel and efficient EC effect strategy in(1-x)Pb(Lu_(1/2)Nb_(1/2))O_(3)-xPbTiO_(3)(PLN-xPT)ceramics for low electric-fielddriven ***-field simulations provide fundamental insights into thermally induced continuous phase transitions,guiding subsequent experimental investigations.A comprehensive composition/temperature-driven phase evolution diagram is constructed,elucidating the sequential transformation from ferroelectric(FE)to antiferroelectric(AFE)and finally to paraelectric(PE)phases for x=0.10-0.18 *** measurements of EC performance highlight x=0.16 as an outstanding performer,exhibiting remarkable properties,including an adiabatic temperature change(ΔT)of 3.03 K,EC strength(ΔT/ΔE)of 0.08 K cm kV-1,and a temperature span(Tspan)of 31℃.The superior EC effect performance is attributed to the temperature-induced FE to AFE transition at low electric fields and diffusion phase transition behavior contributing to the wide *** work provides valuable insights into developing high-performance EC effect across broad temperature ranges through the strategic design of continuous phase transitions,offering a simplified and economical approach for advancing ecofriendly and efficient solid-state cooling technologies.

关键词： PbPb(Lu_(1/2)Nb_(1/2))O_(3)-xPbTiO_(3)(PLN-PT) Electrocaloric effect(ECE) Phase transition Low electric field Antiferroelectric

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A Computational Framework for Parachute Inflation Based on Immersed Boundary/Finite Element Approach

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Transactions of Nanjing University of Aeronautics and Astronautics 2024年第4期41卷 502-514页

作者： huang yunyao ZHANG Yang PU Tianmei JIA He WU Shiqing ZHOU Chunhua College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China Laboratory of Aerospace Entry Descent and Landing TechnologyCASCBeĳing 100094P.R.China College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou 225127P.R.China Beĳing Institute of Space Mechanics and Electricity Beĳing 100096P.R.China College of Aeronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

A computational framework for parachute inflation is developed based on the immersed boundary/finite element approach within the open-source IBAMR *** fluid motion is solved by Peskin's diffuse-interface immersed boundary(IB)method,which is attractive for simulating moving-boundary flows with large *** adaptive mesh refinement technique is employed to reduce the computational cost while retain the desired *** dynamic response of the parachute is solved with the finite element *** canopy and cables of the parachute system are modeled with the hyperelastic material.A tether force is introduced to impose rigidity constraints for the parachute *** accuracy and reliability of the present framework is validated by simulating inflation of a constrained square *** of the present framework on several canonical cases further demonstrates its versatility for simulation of parachute inflation.

关键词： parachute inflation fluid-structure interaction immersed boundary method finite element method adaptive mesh refinement

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不同操纵方式对十字伞滑翔性能的影响研究

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载人航天 2024年第1期30卷 52-59页

作者：黄云尧武士轻张扬南京航空航天大学航天学院南京210016 北京空间机电研究所北京100094 中国航天科技集团有限公司航天进入、减速与着陆技术实验室北京100094

为拓展十字伞的应用场景,提高十字伞的滑翔能力,采用数值模拟手段研究不同操纵方式对十字伞滑翔性能的影响。方法一是从伞绳收口的角度,通过对十字伞的伞绳进行不同程度的收口形成角空气喷口,达到操纵十字伞的目的;方法二是从改变伞衣... 详细信息

为拓展十字伞的应用场景,提高十字伞的滑翔能力,采用数值模拟手段研究不同操纵方式对十字伞滑翔性能的影响。方法一是从伞绳收口的角度,通过对十字伞的伞绳进行不同程度的收口形成角空气喷口,达到操纵十字伞的目的;方法二是从改变伞衣几何透气性的角度,通过加装排气扰流板并使其偏转不同的角度,达到操纵十字伞的目的。数值结果表明:角空气喷口中的伞绳收口程度对十字伞俯仰角的变化影响较为显著,十字伞俯仰角最大可达2°;排气扰流板的偏转角度则对十字伞侧向力的影响较为显著,在偏转角达到30°时,侧向力达到最大,为47.3 N。2种操纵方式均能够使十字伞具备一定的滑翔能力。

关键词：十字伞伞绳收口排气扰流板滑翔性能流固耦合

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几何形状对十字伞充气和滑翔性能的影响

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航天返回与遥感 2022年第5期43卷 48-58页

为了研究几何形状对十字伞充气和滑翔性能的影响,文章采用LS-DYNA软件中的结构化任意拉格朗日-欧拉(S-ALE)流固耦合求解器,利用数值仿真对5种不同几何形状的十字伞进行了动态开伞过程模拟,得到了十字伞展开过程中不同时刻的伞衣形状,并... 详细信息

为了研究几何形状对十字伞充气和滑翔性能的影响,文章采用LS-DYNA软件中的结构化任意拉格朗日-欧拉(S-ALE)流固耦合求解器,利用数值仿真对5种不同几何形状的十字伞进行了动态开伞过程模拟,得到了十字伞展开过程中不同时刻的伞衣形状,并对不同伞型的充气性能进行了对比分析。此外,对充气稳定后的十字伞,通过在其伞绳端施加恒定载荷使其具备滑翔能力,并对比分析了5种伞型的滑翔性能。数值结果表明,异形结构对十字伞的充气性能影响较大,但对滑翔性能的影响因伞型而异,十字伞的长宽比对充气和滑翔性均具有较大影响。

关键词：充气性能滑翔性能十字伞流固耦合航天返回

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短幅外摆线齿轮的测绘、设计

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工业工程 1988年第2期 35-44页

作者：黄运尧广东机械学院机械工程系

本文介绍了关于短幅外摆线齿轮的测绘、计算、判别和设计的方法和过程。这对于摆线针轮减速箱用户厂的工程技术人员在中修、大修测绘、设计工作中颇有参考价值。

关键词：外摆线齿轮减速箱摆线轮摆线齿轮短幅系数摆线针轮测绘设计针齿基圆根圆

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