检索结果-内蒙古大学图书馆

作者： Ning, Deng Xia, Ju-Chen Wang, Xin-Yun Hu, Guo-An State Key Lab. of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China School of Mechanical and Materials Engineering Jiujiang University jiujiang 332005 China

The influencing factors on the workpiece quality of aluminium alloy sheet forming, such as material properties, forming condition, stress status and lubrication types were concluded. And how to improve the performance... 详细信息

ISBN: (纸本)9781424463503

关键词： Engineering

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Construction of dendritic Pt–Pd bimetallic nanotubular heterostructure for advanced oxygen reduction

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Interdisciplinary materials 2024年第6期3卷 907-918页

作者： Mingwei Wang Zhiyi Hu Jieheng Lv Zhiwen Yin Zhewei Xu Jingfeng Liu Shihao Feng Xiaoqian Wang Jiazhen He Sicheng Luo Dafu Zhao Hang Li Xuemin Luo Qi Liu Damin Liu Baolian Su Dongyuan Zhao Yong Liu International School of Materials Science and Engineering(ISMSE) State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhanChina Department of Chemistry Laboratory of Inorganic Materials ChemistryUniversity of NamurNamurBelgium Department of Chemistry Laboratory of Advanced MaterialsShanghai Key Lab of Molecular Catalysis and Innovative MaterialsState Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghaiChina

Compositions and morphologies of Pt-based electrocatalysts have great impact on the electrocatalytic activity and stability of oxygen reduction reaction(ORR).Herein,we report a novel design of one-dimensional(1D)Pt-Pd dendritic nanotubular heterostructures(DTHs)by controlling the degree of Pt 2+-Pt reduction reaction and Pd-Pt galvanic replacement reaction with uniform Pd nanowires as sacrificial *** obtained Pt-Pd bimetallic DTHs catalyst exhibited uniform and dense Pt dendritic nanobranches on the surface of 1D hollow Pt-Pd alloy nanotubes,possessing superior catalytic activity for ORR compared to state-of-the-art commercial Pt/C ***,the Pt_(4)Pd DTHs catalyst showed efficient mass activity(MA,1.05 A mg_(Pt)^(−1))and specific activity(SA,1.25 mA cm_(Pt)^(−2))at 0.9 V(***),and the catalyst exhibited high stability with 90.4%MA retention after 20000 potential *** Pt-Pd bimetallic DTHs configuration combines the advantages of 1D hollow nanostructures and dense Pt dendritic nanobranches,which results in rich electrochemical active surface sites,fast charge transport,and multiple dendritic anchoring points contact on carbon support,thus boosting its catalytic activity and stability towards electrocatalysis.

关键词： dendritic hollow heterostructures electrocatalysis one-dimensional nanowires oxygen reduction proton exchange membrane fuel cells

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Research on the stability of organic/inorganic hybrid perovskite materials for IEC61215 purpose

Research on the stability of organic/inorganic hybrid perovs...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Jiang He Zhiliang Ku Yong Peng State key lab of advanced technology for materials synthesis and processing Wuhan University of Technology

Organi/Inorganic perovskite materials behavior differently under a testing condition of IEC61215. In this research, the behavior of series of perovskite materials with varied A cations under the thermal cycling testing standards were studied. We analyzed the defeating mechanisms of those materials through temperature depended XRD, SEM and AFM ***. Finally, we draw a conclusion that FACsPb（I/Br） perovskite materials could the most stable one under thermal cycling testing condition. This perovskite materials can be stable because the phase change related materials decomposition under frequent temperature change does not happen in this material, however other perovskite materials will decompose. A device with an architecture of FTO/TiO/FACsPbI/graphite electrode was then encapsulated and tested under a condition of -30℃-85℃ for 200 times. After testing, the device finally kept about 83% of its initial power conversion efficiency.

关键词： Standard stability tests Perovskite solar cells thermal cycling tests

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Effects of Heat Treatment on the Thermal Properties of A356 Aluminum Alloys in Different Casting Processes 75

Effects of Heat Treatment on the Thermal Properties of A356 ...

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75th World Foundry Congress, WFC 2024

作者： Luo, Xiaomei Li, Yuan-Dong Liu, Wenjing Qiu, Jin Sun, Lu Zhou, Hongwei Bi, Guang-Li State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology Lanzhou730050 China Key Lab. of Non-ferrous Metal Alloys and Processing Ministry of Education Lanzhou University of Technology Lanzhou730050 China

The thermal diffusivity and specific heat capacity of continuous casting (SC) and high-pressure diecasting (HPDC) aluminum alloys before and after T4 and T6 heat treatments were measured at room temperature, and their thermal conductivity was calculated. The effects of heat treatments on the thermal properties of A356 alloys in different casting processes were investigated, and the mechanism of the effects was also discussed. Before heat treatment, the SC alloys had higher thermal conductivity than that of the HPDC alloys. Moreover, heat treatment after forming had a remarkable influence on the thermal properties of the SC and HPDC alloys. T4 treatment had positive effects on the thermal conductivity of the SC and HPDC A356 alloys, and the T6 heat-treatment SC and HPDC alloys had higher thermal conductivity than that of the T4 treatment alloys. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Continuous casting

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Tailoring lithium intercalation pathway in 2D van der Waals heterostructure for high-speed edge-contacted floating-gate transistor and artificial synapses

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InfoMat 2024年第10期6卷 53-64页

作者： Jun Yu Jiawei Fu Hongcheng Ruan Han Wang Yimeng Yu Jinpeng Wang Yuhui He Jinsong Wu Fuwei Zhuge Ying Ma Tianyou Zhai State Key Laboratory of Materials Processing and Die and Mould Technology School of Material Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhanthe People's Republic of China Hubei Yangtze Memory Laboratory School of Integrated CircuitsHuazhong University of Science and Technology(HUST)Wuhanthe People's Republic of China School of Information Engineering Zhongnan University of Economics and LawWuhanthe People's Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhanthe People's Republic of China Optics Valley Laboratory Hubeithe People's Republic of China

Local phase transition in transition metal dichalcogenides (TMDCs) by lithiumintercalation enables the fabrication of high-quality contact interfaces in twodimensional(2D) electronic devices. However, controlling the intercalation oflithium is hitherto challenging in vertically stacked van der Waalsheterostructures (vdWHs) due to the random diffusion of lithium ions in thehetero-interface, which hinders their application for contact engineering of 2DvdWHs devices. Herein, a strategy to restrict the lithium intercalation pathwayin vdWHs is developed by using surface-permeation assisted intercalationwhile sealing all edges, based on which a high-performance edge-contact MoS_(2)vdWHs floating-gate transistor is demonstrated. Our method avoids intercalationfrom edges that are prone to be random but intentionally promotes lithiumintercalation from the top surface. The derived MoS_(2) floating-gatetransistor exhibits improved interface quality and significantly reduced subthresholdswing (SS) from >600 to 100 mV dec^(–1). In addition, ultrafast program/erase performance together with well-distinguished 32 memory statesare demonstrated, making it a promising candidate for low-power artificialsynapses. The study on controlling the lithium intercalation pathways in 2DvdWHs offers a viable route toward high-performance 2D electronics for memoryand neuromorphic computing purposes.

关键词： 2D vdW heterostructure high-speed floating-gate transistor interlayer lithium intercalation engineering phase-engineered contact

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Design and Production of Filament-Wound Composite Pressure Vessels

Design and Production of Filament-Wound Composite Pressure V...

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第十一届中日复合材料学术会议（CJJCC-11）

作者： Lei Zu Jihui Wang Shuxin Li State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

One of the most important issues for the design of filament-wound pressure vessels reflects on the determination of the most efficient meridian profiles and related fiber architectures. To better understand the design and production of filament-wound pressure vessels, in this paper we present an overview and comprehensive treatment for a variety of composite pressure vessels produced using filament winding. A generalized optimality criterion that is adapted to various optimal design problems for pressure vessels is elab.rated. A new possibility to improve the vessel performance can be offered by the application of adapted cross-sectional shapes instead of the conventional shapes. The isotensoid design, which leads to equal fiber tension throughout the whole vessel, is conducted to determine the netting-based optimal cross-sectional shapes. In addition, a simplified method for designing isotensoid pressure vessels with unequal polar opening is also outlined, with the aid of non-geodesic trajectories. The optimal design, based on orthotropic plate theory, is divided into two basic approaches: numerical and semi-analytical methods. A numerical optimization method is specially designed for determining the optimal meridian profiles of bellow-shaped pressure vessels. The semi-analytical design methods are presented for the determination of the optimal meridian profiles for continuum-based domes and toroids, respectively. The optimal cross sectional shapes lead to significantly improved structural performance of filament-wound products.

关键词： Composite pressure vessels Filament winding Fiber architecture Geodesic Non-geodesic

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Advances in designing heterojunction photocatalytic materials

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Chinese Journal of Catalysis 2021年第5期42卷 710-730页

作者： Zongpeng Wang Zhiping Lin Shijie Shen Wenwu Zhong Shaowen Cao School of Advanced Study Taizhou UniversityTaizhou 318000ZhejiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Pharmaceutical and Material Engineering Taizhou UniversityTaizhou 318000ZhejiangChina

Under the background of increasing energy crisis and global warming,semiconductor-based photocatalysis has received tremendous attention due to its potential application in green energy production,CO_(2) reduction and pollutant *** photocatalytic activity of semiconductors,however,remains low due to issues like fast recombination of photo-generated electron-hole pairs,limited electron mobility,restricted optical absorption or insufficient active *** appropriate heterojunctions is proved to be a promising method to address most of these issues and thus to improve the photocatalytic *** this review,the working mechanism of various heterojunctions is presented *** most recent advances of strategies in designing and preparing efficient heterojunction photocatalysts are further summarized and some perspectives on the future directions in this field are provided.

关键词： Photocatalyst Heterojunction Renewable energy Charge transfer Redox ability

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Study on of high temperature structure behavior of the corundum with different crystal morphology though comparative crystal chemistry method

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2006年第5期28卷 1-3+7页

作者： Huang, Zhi-Liang Zhang, Lian-Meng Liu, Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Material Engineering Wuhan Institute of Technology Wuhan 430073 China

By using of high temperature XRD data, the high temperature structure behavior of corundum (α-Al2O3) with different crystal morphologies was studied by comparative crystal chemistry. It was revealed that cell parameter (a, c) and Al-O bond length (LAl-O) of grain corundum were logarithmically increased because of thermal expansion, but that of the whisker corundum was linearly increased. The crystal lattice coefficient of thermal expansion (M) of the grain corundum was logarithmically increased almost in uniformity tendency, which was isotropy. On the contrary, that of the whisker corundum was linearly increased in whole tendency, the value M of cell parameter (a) is greater than cell parameter (c), which was anisotropy.

关键词： Corundum (α-Al2O3) Crystal morphology High temperature comparative crystal chemistry High temperature structure behavior Thermal expansion

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Influence of friction and lubrication on the formability of aluminium alloy plate

Influence of friction and lubrication on the formability of ...

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2010 International Conference on Mechanic Automation and Control Engineering, MACE2010

作者： Deng, Ning Xia, Ju-Chen Wang, Xin-Yun Hu, Guo-An State Key Lab. of Material Processing and Die and Mould Technology Huazhong University of Science and Technology wuhan 430074 China School of Mechanical and Materials Engineering Jiujiang University Jiujiang332005 China

Analyzed the friction mechanism and lubrication characteristics during the aluminium alloy forming process. Influence of it on the workpiece quality of aluminium alloy sheet forming was concluded. And how to improve t... 详细信息

ISBN: (纸本)9781424477388

关键词： Friction

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Electron transportation and recombination in TiO2film for flexible dye-sensitized solar cell

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key Engineering materials 2011年 451卷 123-133页

作者： Lin, Hong Zhao, Xiaochong Liu, Yizhu Li, Xin Li, Jianbao State Key Lab. of New Ceramics and Fine Processing Department of Material Science and Engineering Tsinghua University Beijing 100084 China Pen-Tung Sah Micro-Nano Technology Research Center Xiamen University Xiamen 361005 Fujian China Key Lab. for Si-Zr-Ti Resource of Hainan Province School of Materials and Chemical Engineering Haidan University Haikou 570228 China

ISBN: (纸本)9780878492473

Research on the flexible dye-sensitized solar cells (DSCs) has been more and more extensively conducted during the recent years both academically and comercially for the sake of its further reduced expense and even broader application. However, significant promotion of electron transport properties and consequently the photovoltaic performances of such devices are perpetually hindered by the key problem that the poor heat tolerance of the plastic substrates employed in flexible DSCs makes high-temperature sintering of the photoanode films impossible. Based on a brief overview of the current state of research on flexible DSCs, including new materials and delicate processing techniques, and the research results from the author's own group, this chapter specially treats the profound mechanistic issue of electron transport and recombination in flexible DSCs, which is rarely discussed and relatively less well understood up to now. It is pointed out that the electron transport and recombination dominate photovoltaic performance of the flexible DSCs and suppressing the recombination of injected electrons with electrolyte redox species is of crucial sense for performance promotion. Besides, the methods for restraining electron recombination are proposed and the developing trend and prospects of flexible DSCs are also presented© 2011 Trans Tech Publications, Switzerland.

关键词： Electron transport properties

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