检索结果-内蒙古大学图书馆

Spinel ferrite with excellent broadband infrared radiation properties for thermal management of electronics

Ceramics International 2025年

作者： He, Lintao Zhu, Wanting Wang, Yixin Nie, Xiaolei Zhang, Yu Wei, Ping Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Electronic equipment faces increasing challenges related to heat dissipation due to miniaturization, high power, and integration advancements. Infrared radiation refrigeration offers numerous advantages, including zero energy consumption and pollution with minimal space occupation, making it highly compatible with the heat dissipation requirements of electronic equipment. However, advancing infrared radiative cooling technology for thermal management requires further research to develop broadband infrared transmitting materials with excellent performance. In this study, the spinel MeFe2O4 (Me = Cu, Mn, Ni, Co, Mg, Zn) powders were prepared through chemical co-precipitation and their emissivity was assessed in various wavebands (3–5, 8–14, 2.5–25, and 1–22 μm). The results showed that spinel ferrite materials displayed outstanding broadband infrared radiative properties. Among them, MnFe2O4 reached the highest emissivity values (0.90, 0.97, 0.96, and 0.97, respectively), suggesting that narrowing the bandgap and improving carrier concentration increases emissivity in the 3–5 μm waveband. Emissivity in the 8–14 μm waveband was also boosted by increasing lattice asymmetry and lattice strain. Furthermore, the MnFe2O4 powder was mixed with PVDF and Graphene, thereby yielding a flexible heat dissipation film. This MnFe2O4/Graphene/PVDF composite film lowered the surface temperature of electronic devices from 90.8 to 83.2 °C at an ambient temperature of 20 °C under operating conditions of approximately 9 W. This study provides an experimental paradigm for designing and optimizing radiative cooling materials for the thermal management of electronic devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Ferrite devices

来源：评论

学校读者我要写书评

暂无评论

Effect of the capsule on deformation and densification behavior of nickel-based superalloy compact during hot isostatic pressing

引用

International Journal of Minerals,Metallurgy and materials 2023年第1期30卷 122-130页

作者： Lebiao Yang Xiaona Ren Chao Cai Pengju Xue MIrfan Hussain Yusheng Shi Changchun Ge Institute of Powder Metallurgy and Advanced Ceramics School of Materials and EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Materials Processing&Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The Shima yield criterion used in finite element analysis for nickel-based superalloy powder compact during hot isostatic pressing(HIP) was modified through uniaxial compression experiments. The influence of cylindrical capsule characteristics on FGH4096M superalloy powder compact deformation and densification behavior during HIP was investigated through simulations and experiments. Results revealed the simulation shrinkage prediction fitted well with the experimental shrinkage including a maximum shrinkage error of 1.5%. It was shown that the axial shrinkage was 1.7% higher than radial shrinkage for a cylindrical capsule with the size of ∮50 mm × 100 mm due to the force arm difference along the axial and radial direction of the capsule. The stress deviated from the isostatic state in the capsule led to the uneven shrinkage and non-uniform densification of the powder compact. The ratio of the maximum radial displacement to axial displacement increased from0.47 to 0.75 with the capsule thickness increasing from 2 to 4 mm. The pressure transmission is related to the capsule thickness, the capsule material performance, and physical parameters in the HIP process.

关键词： hot isostatic pressing nickel-based superalloy compact capsule densification deformation

来源：评论

学校读者我要写书评

暂无评论

Fractal Geometry-based Porosity Analysis of Cementitious Composite Material Using Wollastonite Under Freeze-thaw Condition

引用

Journal of Wuhan University of technology(materials Science) 2025年第3期40卷 769-779页

作者： Aziza Kuldasheva HUANG Bin Kholjigit Kuldashev LI Beixing Bakhtiyor Saidmuratov College of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Ad-vanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Tech-nology of Building Material and Products Samarkand State Architectural and Civil Engineering UniversitySamarkand-140100Uzbeki-stan State Key Laboratory of Silicate Materials for Architecture Wuhan University of TechnologyWuhan 430070China Samarkand International University of Technology School of EngineeringSamarkand-140100Uzbekistan

Low porosity is very significant for cementitious composite materials(CCM)under freeze-thaw *** reduce the porosity of CCM,we used wollastonite mineral fibers as a partial replacement for cement and *** five combinations,in which 10%,32%,and 48%Wollastonite were added,were made for scanning using both scanning electron microscopy(SEM)and computed tomography scan technology(CT).Then,the 2D SEM pictures and the 3D pore distribution curves are obtained before and after the freezing and thawing processes,where the micro-pores in the CCM materials are *** fractal dimension is used to quantify the topography image in two dimensions,as well as the pore distribution in three *** method allows for the determination of both surface porosity and volume porosity,both of which show an increase in response to an escalation of freeze-thaw *** is also found that the micro-damage in the concrete is of self-similarity,and in the context of the fractal dimension,the pore evolution can be quantitatively characterized across different sizes,ranging from local to global levels,before and after freezing and thawing.

关键词： wollastonite recycled-enriched aggregates fractal dimension freeze-thaw cycle CCM SEM CT

来源：评论

学校读者我要写书评

暂无评论

Atomic-resolution Interfacial Microstructure and Thermo-electro-magnetic Energy Conversion Performance of Gd/Bi_(0.5)Sb_(1.5)Te_(3)Composites

引用

Energy & Environmental materials 2024年第4期7卷 355-363页

作者： Chengshan Liu Wenjie Xu Ping Wei Shaoqiu Ke Wenjun Cui Longzhou Li Dong Liang Xianfeng Ye Tiantian Chen Xiaolei Nie Wanting Zhu Wenyu Zhao Qingjie Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu 528000China

Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC)and thermoelectric(TE)effects are the core part for designing TE/MC all-solid-state cooling *** MC phase with TE material is an effective ***,the elemental diffusion and chemical reaction occurring at the two-phase interfaces could significantly impair the cooling ***,Gd/Bi_(0.5)Sb_(1.5)Te_(3)(Gd/BST)composites were prepared by a low-temperature high-pressure spark plasma sintering method with an aim to control the extent of interfacial *** reaction of Gd with the diffusive Te and the formation of GdTe nanocrystals were identified at the Gd/BST interfaces by the atomic-resolution *** formed Bi’_(Te)antisite defects and enhanced{000 l}preferential orientation in BST are responsible for the increased carrier concentration and mobility,which leads to optimized electrical *** heterogeneous interface phases,along with antisite defects,favor the phonon scattering enhancement and lattice thermal conductivity *** optimized composite sintered at 693 K exhibited a maximum ZT of 1.27 at 300 ***,the well-controlled interfacial reaction has a slight impact on the magnetic properties of Gd and a high magnetic entropy change is retained in the *** work provides a universal approach to fabricating thermo-electro-magnetic materials with excellent MC and TE properties.

关键词： interfacial reaction magnetocaloric performance thermoelectric performance thermo-electro-magnetic materials

来源：评论

学校读者我要写书评

暂无评论

Facet Regulation of Fe_(2)O_(3) via Nanoarray Architecture to Enable High Faradic Efficiency for Electrocatalytic Nitrogen Fixation

引用

Journal of Wuhan University of technology(materials Science) 2022年第5期37卷 807-814页

作者： XIE Angi XIAO Liang QIAO Qiumin LIU Jinping School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

We propose a facile facet regulation enabled by nanoarray architecture to achieve a high faradic efficiency of Fe_(2)O_(3) catalyst for NRR. The a-Fe_(2)O_(3) nanorod arrays (NAs) were directly grown on carbon cloth (CC) with specific (104) facet exposure. The highly exposed (104) facets provide abundant unsaturated Fe atoms with dangling bonds as nitrogen reduction reaction catalytically active sites. In addition, the NAs architecture enables the enhanced electrochemical surface area (ECSA) to fully manifest the active sites and maintain the mass diffusion. Thus, the selectively exposed (104) facets coupled with the high ECSA of NAs architecture achieve a high FE of 14.89% and a high yield rate of 17.28 μg h^(-1) cm^(-2). This work presents an effective strategy to develop highly efficient catalytic electrodes for electrochemical NRR via facet regulation and nanoarray architecture.

关键词： facet regulation Fe_(2)O_(3) nanoarray architecture nitrogen reduction reaction faradic efficiency

来源：评论

学校读者我要写书评

暂无评论

Effect of vibration on interfacial microstructure and mechanical properties of Mg/Al bimetal prepared by a novel compound casting

引用

Journal of Magnesium and Alloys 2022年第8期10卷 2296-2309页

作者： Feng Guan Wenming Jiang Guangyu Li Junwen Zhu Junlong Wang Guoliang Jie Zitian Fan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

In this work,a vibration was applied in the preparation of the Mg/Al bimetal by a novel compound casting in order to improve the mechanical properties of the Mg/Al bimetal,and the effect of the vibration on the interfacial microstructure and mechanical properties of the Mg/Al bimetal was *** results indicated that the vibration had a significant effect on the interfacial microstructure and mechanical properties of the Mg/Al bimetal,but it did not change the phase compositions of the interface,which was composed of layerⅠ(Al3Mg2+Mg2Si),layerⅡ(Al_(12)Mg_(17)+Mg_(2)Si)and layerⅢ(Al_(12)Mg_(17)/δ-Mg).Without vibration,the Mg_(2)Si phase with a needle-like morphology mainly aggregated in the layerⅡof the *** the application of the vibration,the SEM and EBSD analysis results showed that the Mg_(2)Si and Al3Mg2phases in the interface were obviously refined,and the distribution of the Mg_(2)Si became more uniform,due to the strong forced convection of the molten metal resulting from the *** TEM analysis indicated that the interface between the A_(l3)Mg_(2) and Mg_(2)Si phases was non-coherent,suggesting the Mg_(2)Si particles cannot act as a heterogeneous nucleation base during the solidification process of the *** to the Mg/Al bimetal without vibration,the shear strength of the Mg/Al bimetal with vibration increased by about 50%from 31.7 MPa on average to 47.5 MPa,and the hardness of the layer I of the interface increased,and the hardness of the layerⅢ*** fracture surface transformed from a flat fracture morphology without vibration to an irregular zigzag fracture morphology.

关键词： Mg/Al bimetal Vibration Compound casting Interfacial microstructure Bonding properties

来源：评论

学校读者我要写书评

暂无评论

Revealing the origin of single-atom W activity in H_(2)O_(2) electrocatalytic production:Charge symmetry-breaking

引用

Carbon Energy 2024年第10期6卷 289-300页

作者： Changfei Jing Junyang Ding Peipei Jia Mengmeng Jin Lihui Zhou Xijun Liu Jun Luo Sheng Dai Institute for New Energy Materials&Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyXiqingTianjinChina ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaLonghuaShenzhenChina Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyXuhuiShanghaiChina State Key Laboratory of Featured Metal Materials and Life−cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanningGuangxiChina

The low-energy electrochemical production of hydrogen peroxide(H_(2)O_(2))has garnered significant attention as a viable alternative to traditional industrial routes,with the goal of achieving carbon *** their H_(2)O_(2) selectivity in the two-electron oxygen reduction reaction(ORR),the coordination environment of tungsten(W)-based materials is *** this study,atomically dispersed W single atoms were immobilized on N-doped carbon substrates by a facile pyrolysis method to obtain a W single-atom catalyst(W-SAC).The coordination environment of an isolated W single atom with a tetra-coordinated porphyrin-like structure in W-SAC was determined by X-ray photoelectron spectroscopy and X-ray absorption spectroscopy ***,the as-prepared W-SAC showed superior two-electron ORR activity in 0.1 M KOH solution,including high onset potential(0.89 V),high H_(2)O_(2) selectivity(82.5%),and excellent *** using differential phase contrast-scanning transmission electron microscopy and density functional theory calculations,it is revealed that the charge symmetry-breaking of W atoms changes the adsorption behavior of the intermediates,leading to enhanced reactivity and selectivity for two-electron *** work broadens the avenue for understanding the charge transfer of W-based electrocatalytic materials and the in-depth reaction mechanism of SACs in two-electron ORR.

关键词： charge symmetry-breaking density functional theory scanning transmission electron microscopy tungsten single-atom catalyst two-electron oxygen reduction reaction

来源：评论

学校读者我要写书评

暂无评论

High-safety and high-voltage lithium metal batteries enabled by nonflammable diluted highly concentrated electrolyte

引用

Nano Research 2024年第4期17卷 2638-2645页

作者： Han Zhang Ziqi Zeng Shuping Wang Yuanke Wu Changhao Li Mengchuang Liu Xinlan Wang Shijie Cheng Jia Xie State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Grid Anhui Electric Power Research Institute Anhui Province Key Laboratory of Electric Fire and Safety Protection(State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities)Hefei 230601China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

Lithium metal batteries(LMBs)show great promise for achieving energy densities over 400 Wh·kg^(-1).However,highly flammable organic electrolytes are a long-lasting problem that triggers safety hazards and hinders the commercial application of ***,a nonflammable diluted highly concentrated electrolyte(DHCE)with ethoxy(pentafluoro)cyclotriphosphazene(PFPN)as a diluent is developed to simultaneously achieve high safety and cycling stability of high-voltage *** optimal DHCE not only ensures reversible Li deposition/dissolution behavior with a superior average Coulombic efficiency(CE)over 99.1%on lithium metal anode(LMA),but also suppresses side reactions and stress crack on the LiCoO_(2)(LCO)under high cut-off *** newly developed DHCE exhibits high thermal stability,showing complete nonflammability and reduced heat generation between the electrolyte and delithiated LCO/cycled *** work offers an opportunity for rational designing nonflammable electrolytes toward high-voltage and safe LMBs.

关键词： lithium metal batteries thermal stability nonflammable electrolyte high-voltage phosphazene

来源：评论

学校读者我要写书评

暂无评论

Realizing high-voltage aqueous zinc-ion batteries with expanded electrolyte electrochemical stability window

引用

Chinese Chemical Letters 2023年第2期34卷 129-140页

作者： Buke Wu Yongbiao Mu Zheng Li Ming Li Lin Zeng Tianshou Zhao Shenzhen Key Laboratory of Advanced Energy Storage Southern University of Science and TechnologyShenzhen 518055China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Aqueous zinc-ion batteries(AZIBs) have aroused significant research interest around the world in the past decade. The use of low-cost aqueous electrolytes and a metallic Zn anode with a suitable redox potential and high energy density make AZIBs a potential alternative to commercial Li-ion batteries in the development of next-generation batteries. However, owing to the narrow electrochemical stability window(ESW) of aqueous electrolytes, the choice of cathode materials is limited, because of which AZIBs exhibit a relatively low operating voltage and energy density. Hence, expanding the ESW of aqueous electrolytes is important for the development of practical AZIBs. This paper systematically reviews the electrolyte engineering strategies being explored to broaden the ESW of AZIBs. An in-depth analysis of high-voltage AZIBs is also presented. We suggest that the realization of high-voltage AZIBs depends on the synergistic development of suitable electrolytes and cathode materials. In addition, the cost associated with their fabrication as well as the use of standardized electrochemical tests should be considered during the design of high-voltage AZIBs.

关键词： High voltage Aqueous zinc ion batteries Electrolytes Cathodes Electrochemical stability window

来源：评论

学校读者我要写书评

暂无评论

Effect of initial orientation on microstructure and mechanical properties of AZ31 Mg alloy sheets via accumulated extrusion bonding

引用

Progress in Natural Science:materials International 2023年第2期33卷 178-184页

作者： Xia Cao Tingzhuang Han Ji Xu Guangsheng Huang Hua Zhang Jianhui Bai Fusheng Pan Department of Mechanics and Surface Engineering Changzhou Institute of Technology Department of Aviation Manufacturing Engineering Changzhou Institute of Technology State Key Laboratory of Solidification Processing School of Materials Science & Engineering Northwestern Polytechnical University State Key Laboratory of Mechanical Transmission College of Materials Science and Engineering Chongqing University Institute for Advanced Studies in Precision Materials Yantai University

In this study, effects of initial orientation on microstructure evolution and mechanical properties of AZ31 Mg alloy sheets via accumulated extrusion bonding(AEB) was systematically studied. The samples with RD and TD parallel to extrusion direction(ED) were labeled as RED and TED, respectively. RD and TD pieces alternately stacked was named as RTED. The results revealed that under three-dimensional compressive stress, {10-12} tensile twinning dominated the first stage deformation in container. As the plunger continuous press down, dynamic recrystallization(DRX) occurred, and the newly fine DRXed grains along original and twin grain boundaries gradually consumed the matrix and twin grains. The microstructure was completely transformed into recrystallized grain structure at sizing band with an average grain size of ～0.9 μm in TED sample, smaller than that of RED *** the alloys extruded out of the die, DRXed grains significantly grew to ～4.5 μm and 3.5 μm for RED and TED samples, respectively. A laminated microstructure was obtained with average grain sizes of～4.4 μm in RD layers and 3.5 μm in TD layers for RTED sample. The AEB processed samples exhibited an ED-tilt double-peak basal texture with similar texture intensity. The tensile tests results indicated that attributed to the combined effect of grain refinement and texture evolution, the yield strength and fracture elongation of RED and TED samples was significantly improved. The heterogeneous microstructure in RTED sample induced an extra work hardening(HDI-work hardening) in tensile deformation and resulted in a further improved elongation of 32.0%.

关键词： Magnesium alloy Accumulated extrusion bonding Initial orientation Microstructure Texture Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：