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中国有色金属学会会刊：英文版 1995年第2期5卷 101-105页

作者： Yi, Jianhong Peng, Chaoqun shu, yongchun Lin, Caidong Xu, Runze Central South Univ of Technology Changsha China

ＰＲＯＣＥＳＳＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＨｏＢａ２Ｃｕ３Ｏ７－δＡＮＤＥＦＦＥＣＴＯＦＭＡＧＮＥＴＩＣＦＩＥＬＤＯＮＳＵＰＥＲＣＯＮＤＵＣＴＩＶＩＴＹＯＦＲＥＢａ２Ｃｕ３Ｏ７－δ（ＲＥ＝Ｙ，Ｈｏ）￥Ｙｉ，Ｊｉ... 详细信息

ＰＲＯＣＥＳＳＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＨｏＢａ２Ｃｕ３Ｏ７－δＡＮＤＥＦＦＥＣＴＯＦＭＡＧＮＥＴＩＣＦＩＥＬＤＯＮＳＵＰＥＲＣＯＮＤＵＣＴＩＶＩＴＹＯＦＲＥＢａ２Ｃｕ３Ｏ７－δ（ＲＥ＝Ｙ，Ｈｏ）￥Ｙｉ，Ｊｉａｎｈｏｎｇ；Ｐｅｎ...

关键词： superconductor REBa2Cu3O7-δ magnetic field pressing magnetic field sintering

Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy

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Journal of Magnesium and Alloys 2022年第3期10卷 782-790页

作者： Shaolong Li Yusi Che Chenyao Li yongchun shu Jilin He Bin Yang Jianxun Song Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou University450001 ZhengzhouChina School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China National Engineering Laboratory of Vacuum Metallurgy Kunming University of Science and Technology650093 KunmingYunnanChina

The electrochemical behavior of Mg^(2+)and Al^(3+)in LiCl-KCl(mass 4:1)melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry,square wave voltammetry and *** results showed that the reductions of Mg^(2+)and Al^(3+)were reversible processes controlled by the rate of the mass *** Mg^(2+)and Al^(3+)coexisted in LiCl-KCl melt,they had no significant effect on the reduction potential of each *** equilibrium potentials of Mg^(2+)/Mg and Al^(3+)/Al were obtained by open circuit potential *** apparent standard potentials were also calculated in this system and the values were-2.52 V vs Cl_(2)/Cl^(−),-1.66 V vs Cl_(2)/Cl^(−),***,the apparent Gibbs free energies of Mg^(2+)/Mg and Al^(3+)/Al were-485.71 kJ/mol^(-1),-480.78 kJ/mol^(-1).Finally,potentiostatic electrolysis was performed on a Mo electrode in LiCl-KCl-MgCl_(2)-AlCl_(3)(the mass ratio of MgCl_(2) to AlCl_(3) was 10:1)melt at different *** components of the deposits were characterized by scanning electron microscope and energy dispersive *** study revealed that the content of Al in the deposit decreased as the overpotential increased and Al tended to segregate at the grain boundaries.

关键词： Electrochemical behavior Thermodynamic properties Mg-Al alloy Electrolysis.

Atomic-resolution investigation of structural transformation caused by oxygen vacancy in La_(0.9)Sr_(0.1)TiO_(3+δ)titanate layer perovskite ceramics

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Journal of Materials Science & Technology 2022年第9期104卷 172-182页

作者： Yang Zhao Yameng Zhu Jinpeng Zhu Hailong Wang Zhuang Ma Lihong Gao Yanbo Liu Kaijun Yang yongchun shu Jilin He Henan Province Industrial Technology Research Institute of Resources and Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China National Key Laboratory of Science and Technology on Materials under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Perovskite functional ceramics have been widely applied for thermal protection owing to their unique physical ***,formation of oxygen vacancies under external stimuli usually limits their performance in practical ***,the mechanism of the effect of oxygen vacancy on the layer structure of perovskite La_(0.9)Sr_(0.1)TiO_(3+δ)was investigated by experiments and first-principles *** experimental results showed that the lattice distortion occurred in oxygen-deficient environment to give a longer c-axis,along with a significant adjustment in the modes of A/B–O bond vibration,resulting in lower *** transmission electron microscopy studies revealed that oxygen vacancies induced localized atomic rearrangements via[TiO_(6)]layer movements to adapt to the lattice *** eventually restructured a part of the layer interfaces by expanding the overlapping projection of atoms in the c-axial *** specific transformation process was described as a compendious process,while geometric phase analysis effectively clarified how oxygen vacancies can inhibit reflectivity on the layer ***,this study provides effective approaches for researching the effects of oxygen vacancy on the physical properties of orthorhombic layer perovskite structures,which may facilitate the development of perovskite-based functional devices.

关键词： Titanate perovskite Oxygen vacancy Atomic rearrangement Optical reflectivity

Effect of indium distribution on optical properties in InGaAs/GaAs quantum wells

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Frontiers of Optoelectronics 2009年第1期2卷 108-112页

作者： Guozhi JIA Jianghong YAO yongchun shu Xiaodong XIN Biao PI Tianjin Institute of Urban Construction The Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials TEDA Applied Physics SchoolNankai University

The effect of In surface segregation and diffusion on the transition energy of an InGaAs/GaAs strained quantum well(QW) was investigated theoretically. Diffusion equations and the Schr?dinger equation on the InGaAs/GaAs QW were solved numerically. The energy shifts under different diffusion lengths were simulated. When the width of QW, L, is larger than 5 nm, the change rate of the transition energy is very minimal at the initial stage of the annealing process for wide QW, and the transition energy has a rapid blue shift with an increase of the diffusion length. When L is smaller than 5 nm, the transition energy is very sensitive to the diffusion *** change rate of transition energy increases with a decrease in QW width.

关键词： quantum well (QW) InGaAs/GaAs surface segregation diffusion

Air plasma-sprayed high-entropy (Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12) coating with high thermal protection performance

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Journal of Advanced Ceramics 2022年第10期11卷 1571-1582页

作者： Kailun WANG Jinpeng ZHU Hailong WANG Kaijun YANG Yameng ZHU Yubin QING Zhuang MA Lihong GAO Yanbo LIU Sihao WEI yongchun shu Yanchun ZHOU Jilin HE School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China National Key Laboratory of Science and Technology on Materials under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Aerospace Research Institute of Materials&Processing Technology Beijing 100076China

High-entropy rare-earth aluminate(Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12)(HE-RE_(3)Al_(5)O_(12))has been considered as a promising thermal protection coating(TPC)material based on its low thermal conductivity and close thermal expansion coefficient to that of ***,such a coating has not been experimentally prepared,and its thermal protection performance has not been *** prove the feasibility of utilizing HE-RE_(3)Al_(5)O_(12) as a TPC,HE-RE_(3)Al_(5)O_(12) coating was deposited on a nickelbased superalloy for the first time using the atmospheric plasma spraying *** stability,surface,and cross-sectional morphologies,as well as the fracture surface of the HE-RE_(3)Al_(5)O_(12) coating were investigated,and the thermal shock resistance was evaluated using the oxyacetylene flame *** results show that the HE-RE_(3)Al_(5)O_(12) coating can remain intact after 50 cycles at 1200℃ for 200 s,while the edge peeling phenomenon occurs after 10 cycles at 1400℃ for 200 *** study clearly demonstrates that HE-RE_(3)Al_(5)O_(12) coating is effective for protecting the nickel-based superalloy,and the atmospheric plasma spraying is a suitable method for preparing this kind of coatings.

关键词： high-entropy ceramics thermal protection coating(TPC) (Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12)(HE-RE_(3)Al_(5)O_(12)) air plasma spraying thermal protection performance

反应熔渗法制备耐烧蚀陶瓷改性C/C复合材料的研究进展

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中南大学学报（自然科学版） 2020年第11期51卷 3032-3043页

作者：侯旭初郝振华舒永春何季麟郑州大学河南省资源与材料工业技术研究院河南郑州450001 郑州大学材料科学与工程学院河南郑州450001

根据熔渗体系组成分类介绍RMI改性C/C复合材料的研究进展,探讨影响RMI改性C/C复合材料的因素和过程强化手段,最后提出RMI改性C/C复合材料亟待解决的主要问题和相应的解决思路,并对RMI改性C/C复合材料未来的发展趋势进行展望。研究结果表... 详细信息

根据熔渗体系组成分类介绍RMI改性C/C复合材料的研究进展,探讨影响RMI改性C/C复合材料的因素和过程强化手段,最后提出RMI改性C/C复合材料亟待解决的主要问题和相应的解决思路,并对RMI改性C/C复合材料未来的发展趋势进行展望。研究结果表明:基体改性技术中反应熔渗是提升C/C复合材料耐烧蚀性能的有效手段,多元素熔渗体系如Si-Mo-Zr和Zr-Si-Al等改性C/C复合材料具有耐烧蚀性能优良、陶瓷相分布均匀、致密度高等特点。应通过不断调节多元素熔渗体系及熔渗元素比例对RMI工艺进行优化,用低成本高性能的C/C复合材料改性技术来突破RMI工艺产业化的限制。

关键词： C/C-陶瓷复合材料反应熔渗法基体改性耐烧蚀性能

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钼粉的制备方法及研究进展

稀有金属 2022年第4期46卷 510-522页

作者：张瑞华郝振华车玉思舒永春孙院军何季麟郑州大学材料科学与工程学院河南郑州450001 郑州大学河南省资源与材料工业技术研究院河南郑州450001 西安交通大学材料科学与工程学院陕西西安710049

钼粉的制备方法直接影响着钼粉的质量和性能,进而影响着钼制品的质量,因此钼粉的制备方法一直是钼冶金领域的研究重点。本文在查阅大量文献的基础上综述了各种制备钼粉的方法,并按照制备原理和技术的不同将这些方法归纳为还原法、分解... 详细信息

钼粉的制备方法直接影响着钼粉的质量和性能,进而影响着钼制品的质量,因此钼粉的制备方法一直是钼冶金领域的研究重点。本文在查阅大量文献的基础上综述了各种制备钼粉的方法,并按照制备原理和技术的不同将这些方法归纳为还原法、分解法以及等离子技术。介绍了氢还原法制备钼粉的现状、不足以及改进方法;介绍了碳还原法、金属还原法在制备钼粉方面各自的优势和不足之处;列举了3种热分解法在制备钼粉方面的应用;简述了等离子技术在制备球形钼粉和超细钼粉方面的现状和技术特点。这些研究工作将拓宽相关研究人员对钼粉制备方法的研究思路,一方面要在传统钼冶金领域对钼粉制备技术进行改进优化;另一方面要结合科技的发展在钼粉应用的新兴领域对钼粉的制备技术进行推陈出新。最后本文对钼粉制备方法的研究发展趋势进行了分析和展望。

关键词：钼粉超细钼粉球形钼粉还原法分解法等离子球化

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电容器级钽粉的显微形貌与结构研究

稀有金属 1998年第4期22卷 290-294页

作者：李钒方克明何季林潘伦桃舒永春中国科学院化工冶金研究所北京科技大学宁夏有色金属冶炼厂

本研究利用定位镶嵌包埋制样技术，对团化烧结造粒后的电容器级钽粉进行了解剖。通过ＳＥＭ与ＥＤＳ进行了形貌观察和成分分析，并对样品进行了ＴＥＭ观察，结果表明电容器级钽粉为孪晶亚稳结构，主要杂质元素为氧。

关键词：电容器级钽粉显微形貌显微结构钽粉

Potential role and therapeutic implications of glutathione peroxidase 4 in the treatment of Alzheimer's disease

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Neural Regeneration Research 2025年第3期20卷 613-631页

作者： Yanxin Shen Guimei Zhang Chunxiao Wei Panpan Zhao yongchun Wang Mingxi Li Li Sun Department of Neurology and Neuroscience Center The First Hospital of Jilin UniversityJilin UniversityChangchunJilin ProvinceChina Cognitive Impairment Center Department of NeurologyThe First Hospital of Jilin UniversityJilin UniversityChangchunJilin ProvinceChina

Alzheimer's disease is an age-related neurodegenerative disorder with a complex and incompletely understood pathogenesis. Despite extensive research, a cure for Alzheimer's disease has not yet been found. Oxidative stress mediates excessive oxidative responses, and its involvement in Alzheimer's disease pathogenesis as a primary or secondary pathological event is widely accepted. As a member of the selenium-containing antioxidant enzyme family, glutathione peroxidase 4 reduces esterified phospholipid hydroperoxides to maintain cellular redox homeostasis. With the discovery of ferroptosis, the central role of glutathione peroxidase 4 in anti-lipid peroxidation in several diseases, including Alzheimer's disease, has received widespread attention. Increasing evidence suggests that glutathione peroxidase 4 expression is inhibited in the Alzheimer's disease brain, resulting in oxidative stress, inflammation, ferroptosis, and apoptosis, which are closely associated with pathological damage in Alzheimer's disease. Several therapeutic approaches, such as small molecule drugs, natural plant products, and non-pharmacological treatments, ameliorate pathological damage and cognitive function in Alzheimer's disease by promoting glutathione peroxidase 4 expression and enhancing glutathione peroxidase 4 activity. Therefore, glutathione peroxidase 4 upregulation may be a promising strategy for the treatment of Alzheimer's disease. This review provides an overview of the gene structure, biological functions, and regulatory mechanisms of glutathione peroxidase 4, a discussion on the important role of glutathione peroxidase 4 in pathological events closely related to Alzheimer's disease, and a summary of the advances in small-molecule drugs, natural plant products, and non-pharmacological therapies targeting glutathione peroxidase 4 for the treatment of Alzheimer's disease. Most prior studies on this subject used animal models, and relevant clinical studies are lacking. Future clinica

关键词： apoptosis ferroptosis inflammation lipid peroxidation natural plant products neurodegenerative disorder neuroprotection oxidative stress small-molecule drugs

感应等离子体球化法制备球形金属粉体的研究进展

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稀有金属材料与工程 2020年第8期49卷 2895-2903页

作者：张庆磊郝振华李静宋建勋朱锦鹏车玉思舒永春何季麟郑州大学河南郑州450001

原料粉体的质量已经成为制约金属3D打印发展的瓶颈因素。感应等离子体球化法制备所得的金属粉体具有球化率高、球形度高、杂质含量低和粒径可控等优点,是当前最有希望实现3D打印用高性能球形金属粉体大规模工业化生产的技术。本文阐述... 详细信息

原料粉体的质量已经成为制约金属3D打印发展的瓶颈因素。感应等离子体球化法制备所得的金属粉体具有球化率高、球形度高、杂质含量低和粒径可控等优点,是当前最有希望实现3D打印用高性能球形金属粉体大规模工业化生产的技术。本文阐述了感应等离子球化技术的工作原理、发展历程和技术特点,着重介绍了利用该技术制备钨、钼、钛等金属球形粉体的研究现状,在此基础上探讨了感应等离子球化技术亟待解决的难点问题以及未来的发展趋势。

关键词：球形粉体感应等离子球化钨粉钛粉 3D打印