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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 dielectric.In 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 film.This 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 denSity.Meanwhile,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

Nanoscale spatial phase modulation of GaAs growth in V-grooved trenches on Si(001) substrate

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Chinese PhySics B 2016年第12期25卷 451-454页

作者：李士颜周旭亮孔祥挺李梦珂米俊萍王梦琦潘教青 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of Sciences

This letter reports the nanoscale spatial phase modulation of GaAs growth in V-grooved trenches fabricated on a Si （001） substrate by metal-organic vapor-phase epitaxy, Two hexagonal GaAs regions with high denSity of stacking faults parallel to Si {111 } surfaces are observed. A strain-relieved and defect-free cubic phase GaAs was achieved above these highly defective regions. High-resolution transmisSion electron microscopy and fast Fourier transforms analySis were performed to characterize these regions of GaAs/Si interface. We also discussed the strain relaxation mechanism and phase structure modulation of GaAs selectively grown on this artificially manipulated surface.

关键词： phase modulation GaAs grooves Si

Si-Based Anode Materials for Li-Ion Batteries:A Mini Review

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Nano-Micro Letters 2014年第4期6卷 347-358页

作者： Delong Ma Zhanyi Cao Anming Hu Institute of Laser Engineering Beijing University of Technology 100 Pingle Yuan Key Laboratory of Automobile Materials Ministry of Education and School of Materials Science and Engineering Jilin University Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee

Si has been conSidered as one of the most attractive anode materials for Li-ion batteries(LIBs) because of its high gravimetric and volumetric capacity. Importantly, it is also abundant, cheap, and environmentally benign. In this review, we summarized the recent progress in developments of Si anode materials. First, the electrochemical reaction and failure are outlined, and then, we summarized various methods for improving the battery performance, including those of nanostructuring, alloying, forming hierarchic structures, and uSing suitable binders. We hope that this review can be of benefit to more intenSive investigation of Si-based anode materials.

关键词： Li-ion batteries Anode Si High capacity Nanomaterials

External quantum efficiency-enhanced Pt Si Schottky-barrier detector utilizing plasmonic ZnO:Al nanoparticles and subwavelength gratings

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Chinese Optics Letters 2016年第7期14卷 14-18页

作者：康冰心蔡毅王岭雪 School of Optoelectronics Beijing Institute of Technology Key Laboratory of Photoelectronic Imaging Technology and Systems Beijing Engineering Research Centre for Mixed Reality and Advanced Display Technology

A infrared light trapping structure combining front subwavelength gratings and rear ZnO：Al nanoparticles for a PtSi Schottky-barrier detector over a 3-5 μm waveband is theoretically investigated. By selecting the proper plasmonic material and optimizing the parameters for the proposed structure, the absorption of the PtSi layer is dramatically improved. The theoretical results show that this improvement eventually translates into an equivalent external quantum efficiency （EQE） enhancement of 2.46 times at 3-3.6 μm and 2.38 times at 3.6-5 μm compared to conventional structures. This improvement in the EQE mainly lies in the increase of light path lengths witifin the PtSi layer by the subwavelength grating diffraction and nanoparticle-scattering effects.

关键词： Pt Si External quantum efficiency-enhanced Pt Si Schottky-barrier detector utilizing plasmonic ZnO Al SBD

Si含量对挤压铸造Al-5.0Cu-0.6Mn-0.7Fe合金显微组织和力学性能的影响

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中国有色金属学报 2015年第11期25卷 3040-3050页

作者：赵愈亮孟凡生张杨张大童杨超张卫文华南理工大学机械与汽车工程学院广州510640

采用拉伸性能和硬度测试、光学显微镜、扫描电镜和X射线衍射仪等手段研究不同Si含量对挤压铸造Al-5.0Cu-0.6Mn-0.7Fe合金显微组织和力学性能的影响。结果表明:当挤压压力为0时,随着Si含量的增加,凝固后期形成的富铁相阻止液相补缩,形成... 详细信息

采用拉伸性能和硬度测试、光学显微镜、扫描电镜和X射线衍射仪等手段研究不同Si含量对挤压铸造Al-5.0Cu-0.6Mn-0.7Fe合金显微组织和力学性能的影响。结果表明:当挤压压力为0时,随着Si含量的增加,凝固后期形成的富铁相阻止液相补缩,形成缩松组织,导致合金的抗拉强度、屈服强度和伸长率都下降;当挤压压力为75MPa时,随着Si含量增加,缩松组织消失,虽然细小和分散的α-Al15(Fe Mn)3(Si Cu)2相和Al2Cu相数量增多,但Al6(Fe Mn Cu)相消失,有利于晶界强化和阻止裂纹的扩展,使得合金的抗拉强度和屈服强度增加;虽然富铁相数量的增加使得合金伸长率降低,但挤压铸造工艺减缓了伸长率降低的趋势。当挤压压力为75 MPa和Si含量为1.1%(质量分数)时,合金的综合力学性能最好,其抗拉强度为232 MPa,屈服强度为118 MPa,伸长率为12.4%。

关键词： Si Al-Cu合金挤压铸造显微组织力学性能

Predicting PhySical Properties of Tetragonal,Monoclinic and Orthorhombic M_3N_4(M=C,Si,Sn) Polymorphs via First-Principles Calculations

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Chinese PhySics Letters 2016年第6期33卷 90-94页

作者：仓玉萍连帅彬杨慧明陈东 College of PhySics and Electronic Engineering Xinyang Normal University

The recently discovered tetragonal, monoclinie and orthorhombic polymorphs of M3N4 （M=C, Si, Sn） are in- vestigated by uSing first-principles calculations. A set of anisotropic elastic quantities, i.e., the bulk and shear moduli, Young＇s modulus, Poisson ratio, H/G ratio and rickets hardness of M3N4 （M=C, Si, Sn） are predicted. The quaSi-harmonic Debye model, assuming that the solids are isotopic, may lead to large errors for the non-cubic crystals. The thermal effects are obtained by the traditional quaSi-harmonic approach. The dependences of heat capacity, thermal expanSion coefficient and Debye temperature on temperature and pressure are systematically discussed in the pressure range of 0 IOGPa and in the temperature range of 0-1100 K. More importantly, o- C3N4 is a negative thermal expanSion material. Our results may have important consequences in shaping the understanding of the fundamental properties of these binary nitrides.

关键词： Si M=C,Si,Sn on of Predicting PhySical Properties of Tetragonal,Monoclinic and Orthorhombic M3N4 M Polymorphs via First-Principles Calculations that in is

Differential attacks on reduced SiMON verSions with dynamic key-guesSing techniques

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Science China(Information Sciences) 2018年第9期61卷 282-284页

作者： Ning WANG Xiaoyun WANG Keting JIA Jingyuan ZHAO Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationShandong University School of Mathematics Shandong University Institute for Advanced Study Tsinghua University Department of Computer Science and Technology Tsinghua University Beijing Research Institute of Telemetry

In 2013,NSA published the specifications of two lightweight block cipher families SiMON and SPECK[1].Since the SiMON family was announced,it has attracted a lot of attention of the cryptanalysts.In this article,we use... 详细信息

关键词： MON Si Differential attacks on reduced SiMON verSions with dynamic key-guesSing techniques

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硅对铁素体耐热不锈钢组织与性能的影响

钢铁 2021年第3期56卷 71-76,110页

作者：张英波邹德宁王泉生张晓明李雨浓西安建筑科技大学冶金工程学院陕西西安710055 陕西省特种设备检验检测研究院陕西西安710048

18Cr-Al-Si铁素体耐热不锈钢作为一种结构连接件的新型材料,主要应用于超(超)临界火力发电领域。为了明确硅含量对该钢组织和性能的影响,以18Cr-Al-Si铁素体耐热不锈钢为成分基础,施以添加2组不同成分的硅含量,通过室温拉伸和高温氧化... 详细信息

18Cr-Al-Si铁素体耐热不锈钢作为一种结构连接件的新型材料,主要应用于超(超)临界火力发电领域。为了明确硅含量对该钢组织和性能的影响,以18Cr-Al-Si铁素体耐热不锈钢为成分基础,施以添加2组不同成分的硅含量,通过室温拉伸和高温氧化等试验方法,同时借助金相显微镜(OM)、扫描电子显微镜(SEM)和X射线衍射仪(XRD)等表征手段,对不同硅含量试验钢组织和性能进行了系统分析。结果表明,硅含量的增加会细化铁素体的晶粒尺寸并增加M23C6碳化物的数量,试验钢的抗拉强度和屈服强度升高,伸长率下降,断裂方式由韧性断裂向韧-脆混合型断裂方式转变;1.35Si试验钢氧化增重较大,因其钢中析出的M23C6碳化物较多,减少了固溶于基体及形成氧化膜的Cr含量,降低了其抗高温氧化性。

关键词： 18Cr-Al-Si 铁素体耐热不锈钢 Si 组织性能碳化物

SnO_2-Si光电极制备及其降解污染物性能

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大连理工大学学报 2019年第1期59卷 14-19页

作者：马瑞芬于洪涛吴帅陈硕大连理工大学环境学院辽宁大连116024

通过化学气相沉积法,在清洁的n型Si表面制备SnO_2薄膜作为保护层,得到SnO_2-Si光电极.采用TEM、SEM、XRD、XPS、DRS等对其进行表征,研究了其在模拟太阳光下光催化降解苯酚的性能.在不同沉积温度下得到的样品中,400℃沉积得到的样品结晶... 详细信息

通过化学气相沉积法,在清洁的n型Si表面制备SnO_2薄膜作为保护层,得到SnO_2-Si光电极.采用TEM、SEM、XRD、XPS、DRS等对其进行表征,研究了其在模拟太阳光下光催化降解苯酚的性能.在不同沉积温度下得到的样品中,400℃沉积得到的样品结晶度相对最高.SnO_2层厚度为230nm时SnO_2-Si光电极光电流响应最强,且分解水起始电位较正,用于降解污染物时可避免分解水副反应的发生.在中性、酸性、碱性电解质溶液中,其循环伏安曲线衰减均不明显,证明SnO_2-Si光电极具有稳定的光电化学性能.在可见光光电催化条件下,偏压为1.8V时,其苯酚的去除率达到100%,TOC去除率达到21%.

关键词：光电催化 SnO2 Si 保护层