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Journal of Materials Science & Technology 2022年第4期99卷 1-8页

作者： renquan wang Tingchuan Zhou Zhiyong Zhong College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Key Laboratory of Advanced Special Materials&Technology Ministry of EducationChengdu 610065China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

Low-temperature fired ferrites or ceramics are usually processed by using low-melting materials(e.g.,glasses,oxides,and eutectics)as sintering aids to obtain compact and uniform ***,a dual-strategy of co-doping with V_(2)O_(5)and Sb_(2)O_(3)oxides and forming a eutectic liquid phase has been employed to reduce the melting point of LiZn ferrite ceramics in an effective *** results indicate that miniscule amounts of V_(2)O_(5)and Sb_(2)O_(3)co-doping contribute in producing dense and uniform microstructures with enhanced magnetic performance by low-temperature *** phase structural and microstructural evolutions have been studied in *** their correlations with magnetic properties have been *** magnetic performance(B_(s)=475.4 mT,M_(s)=82.51 emu/g,B_(r)/B_(s)=0.85,H_(c)=2.2 Oe,ΔH=153.8 Oe)of the LiZn-based ferrite ceramics is achieved by optimized composition and microstructure,which shows great potential for microwave applications including phase shifters and *** importantly,such a co-doping strategy can be also extended to other material systems,like dielectric ceramics,hexagonal ferrites or piezoelectric ceramics.

关键词： Low-temperature firing Eutectic liquid phase Magnetic properties Uniform microstructure FMR line width

Carbonized Yolk-shell Metal-Organic Frameworks for Electrochemical Conversion of CO_(2) into Ethylene

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高等学校化学研究:英文版 2023年第2期39卷 246-252页

作者： wang renquan LI Tiantian GAO Rui QIN Jiaqi LI Mengyao GUO Yizheng SONG Yujiang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian116024P.R.China

With the excessive consumption of fossil fuels and the massive emission of CO_(2),it has led to a series of environmental crises posing a serious threat to sustainable *** CO_(2) reduction reaction( CO_(2)RR)to ethylene helps solve these serious environmental ***,we report the synthesis of a copper-based electrocatalyst by pyrolysis of yolk-shell structured HKUST-1 with partial substitution of trimesic acid by benzimidazole(nitrogen source).The electrocatalyst exhibits an ethylene Faradic efficiency(FE)of 25.8%and a partial ethylene current density of 23.7 mA/cm^(2),in addition,the electrocatalyst can maintain stable performance during 10 h of electrolysis,which are all better than those of the electrocatalyst without nitrogen *** to electrochemical measurements and X-ray photoelectron spectroscopy(XPS),we propose that the nitrogen dopant plays an effective role in stabilizing Cu(I)species and promoting CO_(2) molecules activation,as well as suppressing the reduction of Cu(I)species during ***,the performance of the electrocatalyst toward CO_(2)RR is studied in a flow *** work provides a new route for the design of Cu-based electrocatalyst toward electrochemical CO_(2) conversion into ethylene.

关键词： CO_(2) Cu MOF Electrocatalyst Nitrogen Ethylene

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激光粉末床熔融纯钼组织及性能研究

金属加工（热加工） 2024年第6期 114-119,124页

作者：段骞何勇王仁全黄国亮黄科四川大学材料科学与工程学院四川成都610065 中国核动力研究设计院四川成都610044

钼作为一种难熔金属,由于其具有良好的高温力学性能和低膨胀系数而被广泛应用于核工业及航空航天。使用激光粉末床熔融(LPBF)制备的纯钼有着显著的设计优势和工业生产效率。为了提高LPBF生产效率,通过工艺优化,获得了30μm层厚选区激光... 详细信息

钼作为一种难熔金属,由于其具有良好的高温力学性能和低膨胀系数而被广泛应用于核工业及航空航天。使用激光粉末床熔融(LPBF)制备的纯钼有着显著的设计优势和工业生产效率。为了提高LPBF生产效率,通过工艺优化,获得了30μm层厚选区激光熔化技术的最优工艺参数,制备出致密度为99.2%的无裂纹纯钼样品。经过XRD和EBSD表征发现,不同参数下纯钼样品均存在择优取向以及不同程度的晶格畸变,样品侧面织构强度大于底面。最优样品硬度为206HV,单向压缩强度和伸长率分别为566MPa和20.7%。该研究为LPBF制备30μm层厚的无裂纹且性能优异的纯钼构件奠定了基础。

关键词：纯钼激光粉末床熔融 30μm层厚微观组织压缩性能

Highly oriented NdFeB nanocrystalline magnets from partially recombined compacts with ultrafine grain size by reactive deformation under low pressure

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Journal of Rare Earths 2015年第12期33卷 1298-1302页

作者：余云萍李军刘颖王仁全郑青连利仙 College of Materials Science and Engineering Sichuan University

The partially recombined compacts with ultrafine grain size were taken advantage of preparing anisotropic nanocrystalline magnets with full density and homogenous microstructure and texture by reactive deformation under low pressure. Because of the ul- trafine grain size of the precursors, the partially recombined phases could quickly achieve recombination. The results suggested that the newly recombined Nd2Fe14B grains with fme grain size could undergo deformation immediately during the desorp- tion-recombination reaction, and then an obvious anisotropy and uniform alignment would be obtained. The magnetic properties, （BH）max=214 kJ/m3, Br= 1.26 T, Hcj=463 kA/m, were obtained after being treated for 5 min at 820 ℃ in high vacuum under low pres- sure less than 26 MPa. Microstructures of the magnets were analyzed using X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM） respectively. Magnetic measurements were carried out using a vibrating sample magnetometer （VSM） with the maximum field of 2.88 T. Accurate phase contents were measured by a Mossbauer spectrometer.

关键词： NdzFe14B nanocrystalline HDDR deformation anisotropy rare earths

Research on Preparation Process of Nd-Fe-B Radiation-oriented Magnetic Ring for Micro-motor Used in Automobile

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Research on Preparation Process of Nd-Fe-B Radiation-oriente...

Control of Acyclic Triangle Formations With Orthogonal Control Law

2018中国汽车工程学会年会

作者： CHEN Biao LI Jun wang renquan Sichuan Vocational and Technical College of Transportation Sichuan University

We have researched the effects of the temperature,punch chamfer radius and the degree of deformation on microstructure and magnetic properties of backward extruded Nd-Fe-B radiation-orientedmagnetic *** the back-extrusion process for Nd-FeB radiation-oriented magnetic *** that the additional stress caused by the difference of the rheological velocity between the inner and outer sides of the cylinder wall during the back-extrusion process is the main reason of periodic cracks inside the magnetic ring.

关键词： micro-motor Nd-Fe-B radiation orientation magnetic ring preparation process

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Control of Acyclic Triangle Formations With Orthogonal Contr...

第二十九届中国控制会议

作者： wang Hengsheng,wang renquan,WU Zhi College of Mechanical&Electrical Engineering,Central South University,Changsha 410083,P.R.China

This paper proposes a distributed control law for three mobile autonomous agents to shape an acyclic triangle *** move themselves autonomously in two orthogonal axes to pursue and maintain the prescribed distances to their *** dynamical system approaches exactly to the desired edge lengths and the orientation of the triangle in any initial condition except initial collocation of agent 1 and *** minimally rigid graphs with more than three agents constructed by the Henneberg sequence,using orthogonal control law leads to the exact formation *** analysis of the dynamical system shows the exponential convergence to the only stable equilibrium which corresponds to the desired formation.A set of three variables is defined to describe floating triangle formation,which neglects the translation and rotation of triangles but not its flipping over in the *** variables are also used as a set of state variables of the floating triangular formation to show the trajectories of the dynamical system.

关键词： Formation Control Acyclic Triangle Formation Distributed Control Law Autonomous Agents

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贵冶控制网主干改造

铜业工程 2005年第3期 58-59,35页

作者：王仁诠江西铜业集团公司贵溪冶炼厂

本文简要介绍了贵冶控制网及控制网改造的原则,并对网络改造后采取的提高网络可靠性的方法进行了说明。

关键词： FDDI环网以太网

低温等离子体液相接枝处理电纺PET膜的制备与研究

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化工新型材料 2013年第4期41卷 45-46,52页

作者：王仁权石艳付志峰曹鼎北京化工大学化工资源有效利用国家重点实验室北京100029

采用氮气(N2)低温等离子体引发苯二甲酸乙二醇酯(PET)纳米纤维薄膜表面接枝,液相低温等离子体处理接枝丙烯酸单体,通过电镜照片、水接触角测试、FTIR测试及力学测试,讨论了液相接枝处理后,薄膜的形态及性能的变化。实验中接枝处理的工... 详细信息

采用氮气(N2)低温等离子体引发苯二甲酸乙二醇酯(PET)纳米纤维薄膜表面接枝,液相低温等离子体处理接枝丙烯酸单体,通过电镜照片、水接触角测试、FTIR测试及力学测试,讨论了液相接枝处理后,薄膜的形态及性能的变化。实验中接枝处理的工艺条件是,丙烯酸接枝溶液体积浓度10%,接枝温度60℃,接枝时间2h。液相低温等离子体接枝处理后,薄膜的表面亲水性得到了有效的提高。

关键词：液相低温等离子体对苯二甲酸乙二醇酯丙烯酸接枝

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冶金机械设备齿轮传动装置故障自动辨识研究

机械设计与制造工程 2023年第8期52卷 117-120页

作者：苏力王任全毛娜王婷婷中冶京诚工程技术有限公司北京100176

当前冶金机械设备齿轮传动装置运行特征动态变化较大,导致故障辨识难度增加,为此研究一种新型冶金机械设备齿轮传动装置故障自动辨识方法。首先应用齿轮传动动力学原理,构建冶金机械设备齿轮传动装置模型。然后通过齿轮传动装置啮合频... 详细信息

当前冶金机械设备齿轮传动装置运行特征动态变化较大,导致故障辨识难度增加,为此研究一种新型冶金机械设备齿轮传动装置故障自动辨识方法。首先应用齿轮传动动力学原理,构建冶金机械设备齿轮传动装置模型。然后通过齿轮传动装置啮合频率以及采集到的原始信号,分析齿轮动态运行特征。最后根据齿轮传动装置故障啮合特征与信号特征,完成冶金机械设备齿轮传动装置故障自动辨识。实验结果表明:该方法可进一步提升振动信号采集与分析质量,降低故障辨识结果定位误差。

关键词：冶金机械设备齿轮传动故障齿轮传动装置故障识别与诊断

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模块化轧机在高棒生产线中的应用

轧钢 2023年第6期40卷 96-104页

作者：毛娜王任全马志勇北京京诚瑞信长材工程技术有限公司北京100176

梳理了模块化轧机的发展历程,对比分析了模块化轧机关键机型的结构和特点。详细介绍了模块化轧机的核心设备,即锥箱、辊箱和变速箱的结构和原理,阐明了模块化轧机在轧制工艺技术中的柔性应用。介绍了两种典型布置形式的高速棒材柔性轧... 详细信息

梳理了模块化轧机的发展历程,对比分析了模块化轧机关键机型的结构和特点。详细介绍了模块化轧机的核心设备,即锥箱、辊箱和变速箱的结构和原理,阐明了模块化轧机在轧制工艺技术中的柔性应用。介绍了两种典型布置形式的高速棒材柔性轧制技术在生产线的实际应用,从模块化轧机机组布置、水冷装置的设置、投资成本、运行稳定性和工艺的柔性化5个方面进行了对比分析,模块化轧机高柔性、高精度、高品质,更高效、更低耗、更环保的优势明显,采用模块化轧机的两种高速棒材柔性轧制技术已在多个新建生产线得到实际应用,运行稳定可靠。

关键词：模块化轧机高速棒材设备结构柔性轧制高效低耗低碳环保