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Rare Metals 2022年第5期41卷 1406-1409页

作者： kang liang Yu-Rong Ren School of Materials Science and Engineering Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power BatteryChangzhou UniversityChangzhou 213164China

Sodium-ion batteries(SIBs)have received much attention as a potential energy storage system to replace lithium-ion batteries(LIBs)due to the abundant sodium resources and low cost[1,2].Recently,conversion materials[3]... 详细信息

关键词： replace insertion lithium

Confluence of asymmetric catalysis and electrosynthesis in sustainable chemical transformations

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Science China Chemistry 2024年第3期67卷 755-758页

作者： Qinglin Zhang kang liang Chang Guo Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of ChinaHefei 230026China

Electrosynthesis has gained widespread recognition for its extraordinary ability to precisely control the redox *** outstanding capability enables the direct conversion of non-functionalized substrates into reactive intermediates by utilizing easily accessible starting materials, eliminating the need for preliminary functionalization procedures and allowing for unconventional bond activations.

关键词： Confluence of asymmetric catalysis and electrosynthesis in sustainable chemical transformations

Effects of heat treatment on the corrosion resistance of carbon steel coated with LaMgAl_(11)O_(19) thermal barrier coatings

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International Journal of Minerals,Metallurgy and Materials 2015年第10期22卷 1050-1059页

作者： liang-liang Huang Hui-min Meng Li-kang liang Sen Li Jin-hui Shi Institute for Advanced Materials and Technology University of Science and Technology Beijing

LaMgAl11O19thermal barrier coatings（TBCs） were applied to carbon steels with a NiCoCrAlY bond coat by plasma spraying. The effects of heat treatment on the corrosion resistance of carbon steel coated with LaMgAl11O19TBCs were investigated in 3.5wt% Na Cl solution using polarization curves, electrochemical impedance spectroscopy（EIS）, scanning electron microscopy（SEM）, and X-ray diffraction（XRD）. The results show that a large number of cracks are found in the LaMgAl11O19TBCs after the samples are heat-treated, including some through-thickness cracks. The corrosion forms of the as-sprayed and heat-treated TBCs are uniform corrosion and pitting corrosion, respectively. The as-sprayed TBCs exhibit three EIS time constants after being immersed for less than 7 d, and then a new time constant appears because of steel substrate corrosion. When the immersion time is increased to 56 d, a Warburg impedance（W） component appears in the EIS data. The EIS data for the heat-treated TBCs exhibit only two time constants after the samples are immersed for less than 14 d, and a new time constant appears when the immersion time is increased further. The heat treatment reduces the corrosion resistance of carbon steel coated with LaMgAl11O19TBCs. The corrosion products are primarily γ-Fe OOH and Fe3O4.

关键词： thermal barrier coatings carbon steel corrosion pl

Evaluating the blank contamination and recovery of sample pretreatment procedures for analyzing organophosphorus flame retardants in waters

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Journal of Environmental Sciences 2015年第8期27卷 57-62页

作者： kang liang Yumin Niu Yongguang Yin Jingfu Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Institute of Environment and Health Jianghan University

Organophosphate esters（OPEs）, used as flame retardants and plasticizers, are widely present in environmental waters. Development of accurate determination methods for trace OPEs in water is urgent for understanding the fate and risk of this class of emerging pollutants. However, the wide use of OPEs in experimental materials results in blank interference, which influences the accuracy of analytical results. In the present work, blank contamination and recovery of pretreatment procedures for analysis of OPEs in water samples were systematically examined for the first time. Blank contaminations were observed in filtration membranes, glass bottles, solid phase extraction cartridges, and nitrogen blowing instruments. These contaminations could be as high as 6.4–64 ng/L per treatment. Different kinds of membranes were compared in terms of contamination levels left after common glassware cleaning, and a special wash procedure was proposed to eliminate the contamination from membranes. Meanwhile, adsorption of highly hydrophobic OPEs on the inside wall of glass bottles was found to be 42.4%–86.1%, which was the primary cause of low recoveries and was significantly reduced by an additional washing step with acetonitrile. This work is expected to provide guidelines for the establishment of analysis methods for OPEs in aqueous samples.

关键词： Organophosphate esters Sample pretreatment procedure Blank contamination Recovery Water samples

Application of polarized light microscopy on microstructural characterization of semisolid slurry

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Rare Metals 2023年第10期42卷 3545-3552页

作者： Xiao-kang liang Qiang Zhu Min Luo Da-Quan Li National Engineering Research Center for Composite Materials General Research Institute for Nonferrous MetalBeijing100088China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen518055China

In this paper,two ways of micro structural characterization,optical microscopy(OM) and polarized light microscopy(PLM),were both employed to describe the micro structure of semisolid slurry prepared by swirling enthalpy equilibration device(SEED).The results show that PLM is more reliable and accurate than OM to describe the special morphology feature of semisolid slurry made by SEED ***,the effects of pouring temperature and mass of molten liquid on the primary α-Al particle size and morphology were also investigated using *** quantitative metallographic results measured from PLM demonstrate that the grain size and morphology and their distribution are significantly affected by both pouring temperature and the mass of molten *** grain size poured with 2.7 kg liquid decreases from 659 to186 μm,and grain morphology transforms from dendrite to globular structure with pouring temperature reducing from690 to 630℃.The decreasing pouring temperature also promotes the distribution of spherical structure on the cross ***,the mass of molten liquid decreasing from 2.7 to 2.3 kg can decrease the grain size by maximum of 44% at high pouring temperature.

关键词： Semisolid Microstructural characterization Polarized light microscopy Pouring temperature Mass of liquid

A fast and reliable overset unstructured grids approach

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Acta Mechanica Sinica 2013年第2期29卷 149-157页

作者： Zhong-liang kang Chao Yan Jian Yu Yuan-Yuan Fang Institute of Fluid Mechanics Beihang University Academy of Beijing Gas GroupCo. Ltd

A cell-centred overset unstructured grids approach is *** this approach,the intergrid boundary is initially established based on the wall distance from the cell centre,and is then *** accelerate the intergrid-boundary definition much more,a neighbor-toneighbor donor search algorithm based on advancing-front method is modified with the help of minimum cuboid *** simplify the communications between different grid cell types and to obtain second-order spatial accuracy,a new interpolation method is constructed based on linear reconstruction,which employs only one layer of fringe cells along the intergrid *** unsteady flows with relative motion,the intergrid boundary can be redefined fast and *** numerical results show that the present dynamic overset unstructured grids approach is accurate and reliable.

关键词： Overset unstructured grids·Dynamic grids·Intergrid-boundary definition·Interpolation

Effects of Ultra-high Temperature Treatment on the Microstructure of Carbon Fibers

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Chinese Journal of Polymer Science 2017年第6期35卷 764-772页

作者： Wei-wei Li Hong-liang kang 徐坚刘瑞刚 Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The microcrystalline structure and microvoid structure in carbon fibers during graphitization process （2300-2700 ℃） were characterized employing laser micro-Raman scattering （Raman）, X-ray diffraction （XRD）, small angle X-ray scattering （SAXS）, and high-resolution transmission electron microscopy （HR-TEM）. The crystalline sizes （La, Lc） increased and interlayer spacing （d002） decreased with increasing heat treatment temperature （HTT）. The microvoids in the fibers grew up and contacted to the neighbors with the development of microcrystalline. In addition, the preferred orientation of graphite crystallite along fiber axis decreased and microvoids increased. The results are crucial for analyzing the evolution of microstructure of carbon fibers in the process of heat treatment and important for the preparation of high strength and high modulus carbon fibers.

关键词： Carbon fibers Graphitization Microcrystalline structure Microvoid structure

Research progress on Na_(3)V_(2)(PO_(4))_(2)F_(3)-based cathode materials for sodium-ion batteries

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Chinese Chemical Letters 2023年第6期34卷 7-17页

作者： kang liang Daxiong Wu Yurong Ren Xiaobing Huang Jianmin Ma School of Materials Science and Engineering Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power BatteryChangzhou UniversityChangzhou 213164China School of Physics and Electronics Hunan UniversityChangsha 410082China College of Chemistry and Materials Engineering Hunan University of Arts and ScienceChangde 415000China School of Chemistry Tiangong UniversityTianjin 300387China

Sodium-ion batteries(SIBs)have received significant attention in large-scale energy storage due to their low cost and abundant *** obtain high-performance SIBs,many intensive studies about electrode materials have been carried out,especially the cathode *** various types of cathode material for SIBs,a 3D open framework structural Na_(3)V_(2)(PO_(4))_(2)F_(3)(NVPF)with Na superionic conductor(NASICON)structure is a promising cathode material owing to its high operating potential and high energy ***,its electrochemical properties are severely limited by the poor electronic conductivity due to the insulated[PO_(4)]tetrahedral *** this review,the challenges and strategies for NVPF are presented,and the synthetic strategy for NVPF is also analyzed in ***,recent developments of modification research to enhance their electrochemical performance are discussed,including designing the crystal structure,adjusting the electrode structure,and optimizing the electrolyte ***,further research and application for future development of NVPF are prospected.

关键词： Sodium-ion batteries Na_(3)V_(2)(PO_(4))_(2)F_(3) Synthetic strategy Electrochemical performance Energy storage

THE SINGULAR PERTURBATION METHOD APPLIED TO THE NONLINEAR STABILITY PROBLEM OF A SHALLOW SPHERICAL SHELL(Ⅱ)

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Applied Mathematics and Mechanics(English Edition) 1990年第3期11卷 285-291页

作者： kang Sheng-liang Tongji University.Shanghai

In this paper we consider the nonlinear stability of a thin elastic circular shallow spherical shell under the action of uniform normal pressure with a clamped *** the geometrical parameter k is large,the uniformly valid asymptotic solutions are obtained by means of the singular perturbation *** addition,we give the analytic formula for determining the centre deflection and the critical load,and the stability curve is also *** paper is a continuation of the author's previous paper[11].

关键词： THE SINGULAR PERTURBATION METHOD APPLIED TO THE NONLINEAR STABILITY PROBLEM OF A SHALLOW SPHERICAL SHELL

Bibliometric analysis about compassion fatigue based on Web of Science database

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Frontiers of Nursing 2019年第2期6卷 151-156页

作者： Xi-liang kang Xiao Gao Operating Room of Affiliated Hospital of Taishan Medical University

Objective: To analyze the related foreign literature about compassion fatigue (CF) and to provide the basis for further improving the level of research in this field. Methods: Based on the Web of Science core database and its own analysis function, HistCite analysis software was used to study the diploma research about CF. Results: A total of 652 paper were retrieved, the output of literature showed an increasing trend year by year. The United States ranked first, and China ranked eleventh. The “Oncology Nursing Forum” had the largest number of articles (4.0%). The main research direction was in nursing (29.6%), and the main research output was from articles (73.2%). The key words highly cited were “compassion” and “fatigue”. Figley was the author of the high-yield field, and mainly research institutions were universities. The highly cited article was entitled “Compassion fatigue: Psychotherapists’ chronic lack of self-care”. Conclusions: In recent years, the related heat of CF has been high fever. Our research in this field is still in the primary stage, and it needs to be further excavated and promoted.

关键词： compassion fatigue Web of Science literature measurement