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Study on the automobile exhaust thermoelectric generator test bench

2nd International Conference on materials Science and Engineering, ICMSE 2013

作者： Quan, Rui Tang, Xinfeng Quan, Shuhai State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Automation Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037856444

In order to utilize the exhaust heat of internal combustion engine effectively and enhanceits fuel economy, a test bench used in Automobile Exhaust Thermoelectric Generator (AETEG) isdesigned in this paper, the main controller, temperature monitoring unit and single voltage monitoringunit of the control system are elab.rated. Finally, several initial experiment results are provided, itreveals that prolonging the exhaust's transmission time and path appropriately can help raise thetemperature of heat exchanger's surface and enhance the output performance of AETEG, the methodadopted in this paper is feasible and the AETEG test bench designed is practical. © (2013) Trans Tech Publications, Switzerland.

关键词： Control systems

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synthesis of single-crystalline silicon nitride (α-Si 3N4) nanowires with controlled diameters by nitriding cryomilled nanocrystalline silicon powder

Synthesis of single-crystalline silicon nitride (α-Si 3N4) ...

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作者： Chen, Fei Wang, Zhihao Shen, Qiang Huang, Zhixiong Zhang, Lianmeng Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology Wuhan 430070 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9781605112565

In the present work, silicon nitride nanowires (SNNWs) have been synthesized via nitriding cryomilled nanocrystalline silicon powder. The silicon powder exhibits a fine polycrystalline structure after the cryomilling process, with an average grain size of 25 to 125 nm at various cryomilling times. The SNNWs that form after the nitridation of the cryomilled silicon powder exhibit single crystal structure and are 20 to 100 nm in diameter and ∼10 μm in length. The diameter of the nanowires is in agreement with the grain size of the cryomilled Si powder. Microstructural characterization reveals that the as-synthesized nanowires have a hexagonal structure and their primary growth direction is along the [0001] direction. The formation of the Si-N-Si bond during the cryomilling process, as investigated theoretically with density functional theory, promotes the subsequent synthesis of the α-Si 3N4 nanowires. The mechanism for nanowire formation appears to be a vapor-solid (VS) reaction. © 2010 materials Research Society.

关键词： Nanocrystals

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Preparation of semi-solid slurry of hypereutectic Al-Si alloy by ultrasonic vibration

Preparation of semi-solid slurry of hypereutectic Al-Si allo...

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Semi-Solid processing of Alloys and Composites 10 - Selected, peer reviewed papers from the 10th International Conference on Semi-Solid processing of Alloy and Composites, S2P 2008

作者： Junwen, Zhao Shusen, Wu Ping, An Youwu, Mao State Key Lab. of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9771012039401

The preparation of semi-solid slurry of hypereutectic Al-Si alloy by Ultrasonic Vibration (USV) has been studied. The A390 alloy melt was poured into a preheated metal cup, and subsequently the ultrasonic vibrator was dipped into the melt and USV was imposed. The solidified microstructure of the slurry has been analyzed, and the mechanical properties of the alloy have been tested by making samples through diecasting of the slurry. The results show that the primary Si particles of A390 alloy became finer, rounder and uniformly distributed in microstructure of A390 alloy slurry if imposed with USV, and average diameter of primary Si particles was about 20m. With USV, the ultimate tensile strength and the hardness of rheo-casted samples increased by over 25% and near 50% respectively besides the elongation rose by above 100%. After heat treatment, the mechanical properties were further improved. In addition, the mechanism of preparation of semi-solid slurry of hypereutectic Al-Si alloy by USV is discussed.

关键词： Aluminum alloys

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Preparation of Polycrystalline Singe-phase K0.3MoO3 by Hot Isostatic Pressing Sintering

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Journal of materials Science & technology 2007年第5期23卷 633-636页

作者： dunfeng WANG Rui XIONG Ning SHU Jing SHI Zhengzhong dIN Department of Physics Wuhan University Wuhan 430072 China School of Remote Sensing and Information Engineering Wuhan University Wuhan 430072 China International Center for Material Physics Shenyang 110016 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Nearly single-phase and polycrystalline charge-density-wave compound K0.3MoO3 have been prepared by using a simple method. In this work, K2CO3 and MoOs were used as starting materials and reacted by hot isostatic pressing （HIP） sintering. The product is nearly single phase K0.3MoO3 determined by X-ray powder diffraction （XRD） and energy dispersive spectroscopy （EDS）. Measurement of temperature dependence of resistivity reveals that the transport property of polycrystalline K0.3MoO3 obviously differs from that of single crystal due to the grain boundaries and the anisotropic structure in this kind of compound.

关键词： Blue bronze K0.3MoO3 Charge-density-wave Polycrystalline Hot isostaticpressing

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Isomeric π-Extension Strategy Enables Efficient Copper(I) Emitters with High Electroluminescence Efficiency

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advanced Optical materials 2025年

作者： Ying, Ao Ai, Yuhan Chen, Xingyu Zhang, He Xia, Jianlong Gong, Shaolong College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China

Luminescent copper(I) complexes are emerging as sustainable and cost-effective alternatives to conventional iridium(III) and platinum(II) phosphors in organic light-emitting diodes (OLEDs). However, achieving electroluminescence efficiencies comparable to those of noble metal-based emitters remains a formidable challenge. Here, an isomeric π-extension strategy is adopted to develop two new Cu(I) complexes, Cu-23BF and Cu-43BF, by precisely tuning the fusion site of a benzofuran subunit on a carbazole ligand within a carbene-metal-amide (CMA) motif. Compared to the prototype complex Cu-12BF, these new complexes exhibit more coplanar geometries, elongated molecular structures, and increased electron-hole separation in their excited states, resulting in near-unity photoluminescence quantum yields (up to 97%) and relatively high horizontal dipole ratios (up to 78%) in thin films. Notably, Cu-43BF delivers a short thermally activated delayed fluorescence lifetime of 0.65 µs and a fast radiative rate on the 10⁶ s⁻¹ order, attributed to its well-separated frontier molecular orbitals and favorable excited state ordering. As a result, the Cu-43BF-based OLED achieves a high external quantum efficiency of 29.4%, among the highest reported for Cu(I)-based OLEDs. This work not only provides a practical and effective strategy for designing highly efficient Cu(I) emitters but also highlights the future direction for Cu(I)-based OLEDs. © 2025 Wiley-VCH GmbH.

关键词： carbene-metal-amide copper(I) complex isomeric π-extension organic light-emitting diode

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Effects of VC/Cr3C2 additions on microwave sintering properties of ultrafine WC-10Co hard alloys

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2007年第12期29卷 49-51+62页

作者： Quan, Feng Zhou, Jian Liu, Wei-Bo Liu, Gui-Zhen State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Using the microwave sintering technology, the effects of VC/Cr3C2 additions on the microstructure and properties of the ultrafine WC-10Co alloys were investigated. Experimental results showed that ultrafine WC-10Co alloys with 0.6% additions had the best properties while the excessive grain growth inhibitors would decrease the properties of alloys. Moreover, with or without additions, WC-10Co alloys with finely uniform grained WC by microwave sintering could be obtained.

关键词： Cemented carbide Grain growth inhibitor Microwave sintering Superfine grain

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Performance and microstructure of sulfonated SEBS for proton exchange membranes

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2005年第7期27卷 7-9+53页

作者： Luo, Zhi-Ping Li, Xiao-Hui Yang, Jie Pan, Mu State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

A hydrocarbon proton exchange membrane, the sulfonated styrene/butylene-ethylene/styrene (s-SEBS) three blocks copolymer membrane was prepared. The performance and microstructure of membranes were investigated. The sulfonic groups determined by a FT-IR were on the parapositions of phenyls of PS blocks. The conductivity, water uptake, swelling and hydration coefficient all increase drastically when sulfonation degree came to 15 percent, which exhibited the percolation threshold. Then the first three kept slow increasing with the sulfonation degree growing, but the hydration coefficient came to the peak when the sulfonation degree was about 20. AFM showed that suffocated PS phases were the cylinder structure with 20-30 nm.

关键词： Microstructure Performance Proton exchange membranes Sulfonated SEBS

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Hetero-phase MoC-Mo_(2)C nanoparticles for enhanced photocatalytic H_(2)-production activity of TiO_(2)

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Nano Research 2021年第4期14卷 1095-1102页

作者： Jinfeng Liu Ping Wang Jiajie Fan Huogen Yu Jiaguo Yu School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Hexagonal molybdenum carbide(Mo_(2)C)as an effective non-noble cocatalyst is intensively researched in the photocatalytic H_(2)-evolution field owing to its Pt-like H^(+)-adsorption ability and good ***,hexagonal Mo_(2)C-modified photocatalysts possess a limited H_(2)-evolution rate because of the weak H-desorption *** improve the activity,cubic MoC was introduced into Mo_(2)C toform the carbon-modified MoC-Mo_(2)C nanoparticles(MoC-Mo_(2)C@C)by a calcination *** resultant MoC-Mo_(2)C@C(ca.5 nm)was eventually coupled with Ti0_(2)to acquire high-efficiency Ti0_(2)/MoC-Mo_(2)C@C by electrostatic *** highest H_(2)-generation rate of Ti0_(2)/MoC-Mo_(2)C@C reached of 918μmol·h^(-1)·g^(-1)which was 91.8,2.7,and 1.5 times than that of the Ti0_(2),TiO_(2)/MoC@C,and Ti0_(2)/Mo_(2)C@C,*** enhanced rate of Ti0_(2)attributes to the carbon layer as cocatalyst to transmit electrons and the hetero-phase MoC-Mo_(2)C as H_(2)-generation active sites to boost H_(2)-evolution *** research offers a novel insight to design photocatalytic materials for energy applications.

关键词： TiO_(2) MoC-MO_(2)C@C cocatalyst H_(2)evolution photocatalysis

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Synergetic codoping in fluorinated Ti1-xZrxO 2 hollow microspheres

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Journal of Physical Chemistry C 2009年第24期113卷 10712-10717页

作者： Liu, Shengwei Yu, Jiaguo Mann, Stephen State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Luoshi Road 122# Wuhan 430070 China Centre for Organized Matter Chemistry School of Chemistry University of Bristol Bristol BS8 ITS United Kingdom

The synergetic effects of codoped Zr4+ and F- ions within anatase hollow microspheres produced by a fluoridemediated self-transformation strategy are investigated and discussed. The concomitant participation of Fpromotes lattice substitution of Ti4+ ions by Zr4+ and facilitates the transformation of surface-segregated amorphous ZrOx clusters into Zr - F species. Codoping is associated with electron transfer-mediated charge compensation between the Zr/F impurities, which reduces the number of both bulk and surface defects and provides a stabilizing effect on the local structure. Moreover, these synergetic interactions influence the textural characteristics and surface states of the TiO2 host, such that the photocatalytic activity with regard to the decomposition of gaseous toluene is enhanced. Synergetic codoping of heterogeneous impurities within the host lattice or near-surface regions provides a general and effective alternative strategy for higher level doping and surface modification, which may be crucial for catalyst design and associated applications. © 2009 American Chemical Society.

关键词： Zirconium compounds

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Nitrogen doped porous carbon-based bifunctional oxygen electrocatalyst with controllab.e phosphorus content for zinc-air battery

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Nano Research 2023年第4期16卷 5887-5893页

作者： Shichang Cai Zihan Meng Gaojie Li Yu An Yapeng Cheng Erjun Kan Bo Ouyang Haining Zhang Haolin Tang School of Material Science and Engineering Henan University of TechnologyZhengzhou 450001China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryXianhu Hydrogen ValleyFoshan 528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Applied Physics and Institution of Energy and Microstructure Nanjing University of Science and TechnologyNanjing 210094China

The controllab.e construction of non-noble metal based bifunctional catalysts with high activities towards oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is of great significance,but remains a ***,we reported an effective method to synthesize cobalt-nitrogen doped mesoporous carbon-based bifunctional oxygen electrocatalyst with controllab.e phosphorus content(Co-N-P_(X)-MC,X=0.5,1.0,1.5,2.0).The mesoporous carbon substrate endowed the asprepared samples with more exposed active surface(236.50 m^(2)·g^(−1))and the most appropriate doping ratio of phosphorus had been investigated to be 1.5(Co-N-P1.5-MC).For ORR,Co-N-P1.5-MC exhibited excellent catalytic activity with more positive onset potential(1.01 V)and half-wave potential(0.84 V)than the other *** OER,Co-N-P1.5-MC also showed a low overpotential of 415 *** experimental results and density-functional theory(DFT)calculations,the outstanding bifunctional catalytic performance of Co-N-P1.5-MC was due to the synergistic cooperation between the P and N dopants,which could reduce the reaction barriers and was favorable for ORR and ***,the Zn-air battery using Co-N-P1.5-MC as the cathode showed remarkable battery performance with high stability(could operate stably for over 160 h at 10 mA·cm^(−2))and maximum power density(119 mW·cm^(−2)),demonstrating its potential for practical *** work could provide significant enlightenment towards the design and construction of bifunctional oxygen electrocatalyst for next-generation electrochemical devices.

关键词： cobalt-nitrogen doped porous carbon phosphorus doping bifunctional electrocatalyst oxygen reduction reaction(ORR)and oxygen evolution reaction(OER) Zn-air battery

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