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Simultaneously achieving high energy density and responsivity in submicron BaTiO_(3) film capacitors integrated on Si

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Journal of Advanced Ceramics 2024年第2期13卷 198-206页

作者： Jun Ouyang Yinxiu Xue Chuanqi Song Meiling Yuan Kun Wang yuyao zhao Hongbo Cheng Hanfei Zhu Chao Liu Institute of Advanced Energy Materials and Chemistry School of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory of Key Film Materials&Application for Equipment School of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Shandong UniversityJinan 250061China Academic Affairs Office Civil Aviation University of ChinaTianjin 300300China China Tobacco Shandong Industrial Co. Ltd.Jinan 250014China

In the research field of energy storage dielectrics,the“responsivity”parameter,defined as the recyclable/recoverable energy density per unit electric field,has become critically important for a comprehensive evaluation of the energy storage capability of a *** this work,high recyclable energy density and responsivity,i.e.,W_(rec)=161.1 J·cm^(-3) and ξ=373.8 J·(kV·m^(2))^(-1),have been simultaneously achieved in a prototype perovskite dielectric,BaTiO_(3),which is integrated on Si at 500℃ in the form of a submicron thick *** ferroelectric film features a multi-scale polar structure consisting of ferroelectric grains with different orientations and inner-grain ferroelastic domains.A LaNiO_(3) buffer layer is used to induce a{001}textured,columnar nanograin microstructure,while an elevated deposition temperature promotes lateral growth of the nanograins(in-plane diameter increases from~10-20 nm at lower temperatures to~30 nm).These preferably oriented and periodically regulated nanograins have resulted in a small remnant polarization and a delayed polarization saturation in the film’s P-E behavior,leading to a high recyclable energy ***,an improved polarizability/dielectric constant of the BaTiO_(3) film has produced a much larger maximum polarization than those deposited at lower temperatures at the same electric field,leading to a record-breaking responsivity for this simple perovskite.

关键词： energy storage energy density responsivity BaTiO_(3) dielectric capacitor Si

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Tunable antiferroelectric-like polarization behavior and enhanced energy storage characteristics in symmetric BaTiO_(3)/BiFeO_(3)/BaTiO_(3) heterostructure

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Journal of Materiomics 2024年第6期10卷 1290-1298页

作者： Ying Wang Hanfei Zhu Hongyu Luo Jianting Li Yu Huan yuyao zhao Li Li Hongbo Cheng Chao Liu Qingguo Chi Jun Ouyang School of Chemistry and Chemical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China School of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China Key Laboratory of Engineering Dielectrics and Its Application(Ministry of Education) Harbin University of Science and TechnologyHarbin150080China School of Material Science and Engineering University of JinanJinan250022China State Key Laboratory of Metal Matrix Composites School of Material Sciences and EngineeringShanghai Jiao Tong UniversityShanghai200240China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) Hunan Provincial Key Laboratory of Thin Film Materials and DevicesSchool of Material Sciences and EngineeringXiangtan UniversityXiangtan411105China

The excellent energy storage performances of dielectric materials,a high energy density and efficiency,the stability in a wide range of temperature,frequency and cycling time,are surely desirable for the energy storage devices.A trade-off relationship between polarization and breakdown strength,however,limits the enhancement of energy storage properties of dielectric *** effectively boost the energy density and efficiency of dielectric capacitors,by inserting a BiFeO3 layer into the BaTiO3 film in present case,the symmetric BaTiO3/BiFeO3/BaTiO3 tri-layer film heterostructure with antiferroelectric-like characteristics was constructed based on the dual-interlayer coupling effect,what's more,its antiferroelectric-like characteristics will evolve with electric *** the tunable polarization behavior endows it with an enhanced maximum polarization but a reduced remnant one,a delayed saturation of polarization and a high breakdown strength,which are synergistically accountable for a large energy density(Wrec∼109 J/cm^(3))and a high efficiency(η∼82.6%),together with the good thermal(TR∼200℃,ΔWrec<3%&Δη<10%)and frequency(50 Hz–10 kHz,ΔWrec<7%&Δη<13%)stabilities,particularly an outstanding cycling reliability(10^(9) cycles,both ΔWrec and Δη<1%).Hence these findings can provide some innovative ideas for enriching the performance tuning of ferroelectrics,especially in enhancing their energy storage characteristics.

关键词： Antiferroelectric-like Tri-layer film heterostructure Tunable polarization behavior Interlayer coupling Energy storage

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乡村振兴背景下杨柳青镇民俗文化的数字化设计分析与研究

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天津美术学院学报 2024年第4期 74-77页

作者：鲁睿马文卓赵宇耀天津美术学院环境与建筑艺术学院天津天狮学院艺术与设计学院

本文探讨了在乡村振兴战略背景下,如何通过数字化设计手段促进杨柳青镇民俗文化的保护与发展。文章首先分析了杨柳青镇丰富的民俗文化资源及其面临的挑战,随后系统地探讨了数字化设计在表层文化、中层文化和深层文化三个层面的应用。研... 详细信息

本文探讨了在乡村振兴战略背景下,如何通过数字化设计手段促进杨柳青镇民俗文化的保护与发展。文章首先分析了杨柳青镇丰富的民俗文化资源及其面临的挑战,随后系统地探讨了数字化设计在表层文化、中层文化和深层文化三个层面的应用。研究指出,数字化技术不仅能够为民俗文化提供新的传播渠道,还能增强其故事性和互动性,从而吸引更多公众的参与。文章最后提出了保护优先、新旧融合、打造经典等数字化设计建议,旨在通过创新设计方法,促进杨柳青镇民俗文化的传承与创新,同时带动当地文旅产业的发展。

关键词：乡村振兴杨柳青民俗文化数字化设计

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Directional amine-based solvent extraction for simultaneous enhanced water recovery,salt separation and effective descaling from hypersaline brines

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Frontiers of Environmental Science & Engineering 2024年第3期18卷 83-92页

作者： yuyao Zhang Litao Jia Jin zhao Xuming Liu Shuyu Dong Chuanyang Liu Yuanyuan Cui Shougang Research Institute of Technology Beijing 100043China Research Center of Environmental Technology in Water Pollution Source Identification and Precise Supervision School of EnvironmentTsinghua UniversityBeijing 100084China

The feasibility of simultaneous water recovery,salt separation and effective descaling of hypersaline brine was investigated by diisopropylamine(DIPA)-based directional solvent extraction(DSE),using diluted/concentrated seawater with initial saline concentration range of 12–237 g/L at extraction temperatures of 5 and 15℃,*** water recovery shows an obvious boundary at saline concentration of 115 g/L under dual effect of specific water extraction efficiency and extraction *** Cl^(–) ion concentration in product water is in sharp contrast to the nearly complete removal of SO_(4)^(2–)and hardness ions,indicating that DIPA-based DSE process indeed achieved efficient separation and purification of Cl^(–) ion from hypersaline ***,the radical precipitation of Mg^(2+)and Ca^(2+)ions in form of Mg(OH)_(2)and CaCO_(3)demonstrates effective descaling potential,although it leads to more DIPA residues in dewatered raffinate than product ***,an exponential correlation between the Cl^(–) removal efficiency and specific water extraction efficiency further reveals the intrinsic relationship of water extraction process and transfer of Cl^(–) ion to the product ***,the study provides a novel approach for integrating the water recovery and separation of Cl^(–) ion from ultra-high-salinity brines with radical precipitation of Mg^(2+)and Ca^(2+) ions in one step.

关键词： Hypersaline brines Directional solvent extraction Salt separation Ca^(2+)and Mg^(2+)descaling

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Comparative analysis of the characteristics of outlet short circuit and winding insulation fault of distribution transformer and its preventive measures

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High Voltage 2024年第3期9卷 700-709页

作者： Richang Xian yuyao Hu Bingqian Zhang Qingyu Rong Rujie zhao Wei Wang Yang Guo Yunhao Li College of Electrical and Electronic Engineering Shandong University of TechnologyZiboChina State Grid of China Technology College JinanChina Shandong Huineng Electric Co. Ltd.ZiboChina

Outlet short circuit on the low-voltage(LV)side and winding inter-turn short circuit faults are hazardous to transformer *** investigate the formation mechanism of winding insulation faults of distribution transformer,ANSYS Maxwell was used to build a coupled magnetic field-circuit model with the same structural dimension as the actual distribution *** outlet short circuit and winding inter-turn insulation faults were set by using the voltage-controlled switch in the external circuit of the ***-sequently,the differences in the electromagnetic characteristics and the electrodynamic force distributions of the windings under three operating conditions,namely,nominal load,three-phase outlet short circuit on the LV side and inter-turn insulation failure were studied,*** results show that compared with the rated load,in the cases of outlet short circuit and inter-turn insulation faults,the amplitude of winding current in-creases by 20 and 50 times,the magnetic field strength grows by 20 and 17 times,and the electrodynamic force rises by 400 and 230 times,*** short circuit fault is more likely to cause the winding instability and deformation,and inter-turn short circuit fault can easily burn out winding ***,corresponding preventive measures were proposed.

关键词： fault characteristics winding

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硅片上集成高介电调谐率的柱状纳米晶BaTiO_(3)铁电薄膜

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无机材料学报 2022年第6期37卷 596-602页

作者：赵玉垚欧阳俊山东大学材料科学与工程学院材料液固结构演变与加工教育部重点实验室济南250061 齐鲁工业大学(山东省科学院)化学与化工学院济南250353

钛酸钡(BaTiO_(3))具有优异的介电、铁电、压电和热释电等性能,在微电子机械系统和集成电路领域具有广泛的应用。降低BaTiO_(3)薄膜的制备温度使其与现有的CMOS-Si工艺兼容,已成为应用研究和技术开发中亟需解决的问题。本研究引入与BaTi... 详细信息

钛酸钡(BaTiO_(3))具有优异的介电、铁电、压电和热释电等性能,在微电子机械系统和集成电路领域具有广泛的应用。降低BaTiO_(3)薄膜的制备温度使其与现有的CMOS-Si工艺兼容,已成为应用研究和技术开发中亟需解决的问题。本研究引入与BaTiO_(3)晶格常数相匹配的LaNiO_(3)作为缓冲层,以调控其薄膜结晶取向,在单晶Si(100)基底上450℃溅射制备了结构致密的柱状纳米晶BaTiO_(3)薄膜。研究表明:450℃溅射温度在保持连续柱状晶结构和(001)择优取向的前提下,能获得相对较大的柱状晶粒(平均晶粒直径27 nm),一定残余应变也有助于其获得较好的铁电和介电性能。剩余极化强度和最大极化强度分别达到了7和43μC·cm^(-2)。该薄膜具有良好的绝缘性,在0.8 MV·cm^(-1)电场下,漏电流密度仅为10^(-5) A·cm^(-2)。其相对介电常数εr展现了优异的频率稳定性:在1 kHz时εr为155,当测试频率升至1 MHz,εr仅轻微降低至145。薄膜的介电损耗较小,约为0.01~0.03(1 kHz~1 MHz)。通过电容-电压测试,该薄膜材料展示出高达51%的介电调谐率,品质因子亦达到17(@1 MHz)。本研究所获得的BaTiO_(3)薄膜在介电调谐器件中有着良好的应用前景。

关键词：硅 BaTiO_(3) 铁电薄膜柱状纳米晶介电调谐率品质因子

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Prognostic nomograms for young breast cancer:A retrospective study based on the SEER and METABRIC databases

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Cancer Innovation 2024年第6期3卷 86-99页

作者： Yongxin Li Xinlong Tao Yinyin Ye yuyao Tang Zhengbo Xu Yaming Tian Zhen Liu Jiuda zhao Breast Disease Diagnosis and Treatment Center of Affiliated Hospital of Qinghai University&Affiliated Cancer Hospital of Qinghai University XiningQinghaiChina Qinghai University XiningQinghaiChina Department of Imaging Affiliated Hospital of Qinghai UniversityXiningQinghaiChina

Background:Young breast cancer(YBC)is a subset of breast cancer that is often more aggressive,but less is known about its *** this study,we aimed to generate nomograms to predict the overall survival(OS)and breast cancer‐specific survival(BCSS)of YBC ***:Data of women diagnosed with YBC between 2010 and 2020 were obtained from the Surveillance,Epidemiology,and End Results(SEER)*** patients were randomly allocated into a training cohort(n=15,227)and internal validation cohort(n=6,526)at a 7:3 *** the Cox regression models,significant prognostic factors were identified and used to construct 3‐,5‐,and 10‐year nomograms of OS and *** from the Molecular Taxonomy of Breast Cancer International Consortium(METABRIC)database were used as an external validation cohort(n=90).Results:We constructed nomograms incorporating 10 prognostic factors for OS and *** nomograms demonstrated strong predictive accuracy for OS and BCSS in the training cohort,with C‐indexes of 0.806 and 0.813,*** calibration curves verified that the nomograms have good prediction *** curve analysis demonstrated their practical clinical value for predicting YBC patient survival ***,we provided dynamic nomograms to improve the operability of the *** risk stratification ability assessment also showed that the OS and BCSS rates of the low‐risk group were significantly better than those of the high‐risk ***:Here,we generated and validated more comprehensive and accurate OS and BCSS nomograms than models previously developed for *** nomograms can help clinicians evaluate patient prognosis and make clinical decisions.

关键词： breast cancer‐specific survival nomogram overall survival prognostic model young breast cancer

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Triazolotriazine-based thermally activated delayed fluorescence materials for highly efficient fluorescent organic light-emitting diodes(TSF-OLEDs)

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Science Bulletin 2021年第5期66卷 441-448,M0003页

作者： Rongchuan Su yuyao zhao Feng Yang Lian Duan Jingbo Lan Zhengyang Bin Jingsong You College of Chemistry Sichuan UniversityChengdu 610064China Key Laboratory of Organic Optoelectronics Department of ChemistryTsinghua UniversityBeijing 100084China

Thermally activated delayed fluorescence(TADF) sensitized fluorescent organic light-emitting diodes(TSF-OLEDs) have shown great potential for the realization of high efficiency with low efficiency rolloff and good color purity. However, the superior examples of TSF-OLEDs are still limited up to ***, a trade-off strategy is presented for designing efficient TADF materials and achieving highperformance TSF-OLEDs via the construction of a new type of triazolotriazine(TAZTRZ) acceptor. The enhanced electron-withdrawing ability of TAZTRZ acceptor, fused by triazine(TRZ) and triazole(TAZ)together, enables TADF luminogens with small singlet-triplet energy gap(ΔE_(ST)) values. Meanwhile, the increased planarity from the TRZ-phenyl linkage(6:6 system) to the TAZ-phenyl linkage(5:6 system)can compensate the decrease of oscillator strength(f) while lowing ΔE_(ST), thus achieving a trade-off between small ΔE_(ST) and high f. As a result, the related TSF-OLED achieved an extremely low turn-on voltage of 2.1 V, an outstanding maximum external quantum efficiency(EQEmax) of 23.7% with small efficiency roll-off(EQE1000 of 23.2%;EQE5000 of 20.6%) and an impressively high maximum power efficiency of 82.1 lm W^(-1), which represents the state-of-the-art performance for yellow TSF-OLEDs.

关键词： Thermally activated delayed fluorescence Fluorescent organic light-emitting diodes Electron acceptor Triazolotriazine

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软岩填筑高面板堆石坝分区及材料设计

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水利水电科技进展 2022年第6期42卷 73-78页

作者：赵大洲赵宇瑶王新奇黄河勘测规划设计研究院有限公司河南郑州450003 华中科技大学土木与水利工程学院湖北武汉430074

通过分析软岩不同利用方案及分区形式对高面板堆石坝力学性状的影响,获取了坝体应力和变形的变化规律。高面板堆石坝下游次堆石区中软岩含量及堆石区几何特征、主堆石体分区形式均影响面板堆石坝的力学性状。提高坝体下游堆石区的强度... 详细信息

通过分析软岩不同利用方案及分区形式对高面板堆石坝力学性状的影响,获取了坝体应力和变形的变化规律。高面板堆石坝下游次堆石区中软岩含量及堆石区几何特征、主堆石体分区形式均影响面板堆石坝的力学性状。提高坝体下游堆石区的强度及刚度,可以提高各堆石区之间的协调变形能力、降低面板变形及应力。提高位于坝轴线处的堆石体承载力,可以有效降低坝体变形及面板应力。为控制高面板堆石坝的坝体变形及应力,坝轴线处坝体下部堆石区宜填筑承载力高的堆石体,下游堆石区中软岩比例不宜超过30%。

关键词：混凝土面板堆石坝软岩材料分区应力变形

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基于点-面两层结构的复杂网络方法评估海河流域水网连通性

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水资源与水工程学报 2023年第6期34卷 16-26页

作者：李发文赵宇瑶天津大学水利工程仿真与安全国家重点实验室天津300072 国网新源控股有限公司抽水蓄能技术经济研究院北京100761

河湖水系连通是指通过修建渠道、挖掘河道、改造湖泊等方式,将不同河流、湖泊之间相互连接起来,形成一个相互衔接的水系网络。基于复杂网络方法,从节点和子流域两个层面对海河流域水网的连通性进行分析。在子流域层面,用平均度指标评价... 详细信息

河湖水系连通是指通过修建渠道、挖掘河道、改造湖泊等方式,将不同河流、湖泊之间相互连接起来,形成一个相互衔接的水系网络。基于复杂网络方法,从节点和子流域两个层面对海河流域水网的连通性进行分析。在子流域层面,用平均度指标评价流域连通度,用网络直径等指标辅助分析流域整体水系连通情况;在单个节点层面,用度指标、中介中心性指标分析流域水系各节点连通度的分布情况,实现了节点微观与流域宏观的结合。同时,引入聚类系数指标,获得每个子流域河网的空间分布特征。通过对研究结果的合理性评估,认为应用复杂网络方法能全面分析流域水系特征及连通情况,具有良好的应用前景。

关键词：水系连通复杂网络点-面两层结构区域水网适应性评价海河流域

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