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回火温度对铁素体/马氏体双相不锈钢组织与性能的影响

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金属热处理 2015年第1期40卷 86-90页

作者：孙国强梁剑雄刘振宝杨志勇易健宏甘国友王长军昆明理工大学材料科学与工程学院云南昆明650093 钢铁研究总院特殊钢研究所北京100081

利用扫描电镜、透射电镜等试验手段,研究了回火温度对铁素体/马氏体双相不锈钢组织与性能的影响规律。结果表明,试验钢的组织为马氏体+铁素体,组织存在大量位错,经回火处理后,马氏体板条间以及双相界面处均发现了M23C6相析出,其颗粒尺... 详细信息

利用扫描电镜、透射电镜等试验手段,研究了回火温度对铁素体/马氏体双相不锈钢组织与性能的影响规律。结果表明,试验钢的组织为马氏体+铁素体,组织存在大量位错,经回火处理后,马氏体板条间以及双相界面处均发现了M23C6相析出,其颗粒尺寸随着回火温度的升高而逐渐增大。回火温度对力学性能的影响主要表现为,随着回火温度的升高,抗拉强度与规定塑性延伸强度均有所降低,断后伸长率与断面收缩率基本保持一致,而冲击性能却显著提高。此外,经回火处理后试验钢的磁性能得到显著改善。

关键词：铁素体/马氏体双相不锈钢 M23C6相回火温度显微组织导磁性能

Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： Yang liu Huopo Chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun liu Yiren Yu Guoshu Gao Yumeng Zhao Xiongfu Zhang Guodong liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

Synthesis of faveolate open-structured Ru-N/C cathode catalyst with high bifunctional activity for rechargeable quasi-solid-state Li-O_(2)batteries

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Nano Research 2025年第1期18卷 351-361页

作者： Tie liu School of Chemistry and Chemical Engineering Heze UniversityHeze 274015China

The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)*** study employs a mild solution precipitation method followed by thermolysis to construct a faveolate open-structured Ru-N/C matrix with a loosely braided network morphology as a bifunctional *** details prove that this hybrid structure is composed of ultrafine Ru globular nanoparticles(ca.2 nm)coated with an N-enriched carbon film and exhibits a valuable beehive through-hole character for rapid mass transport during oxygen redox *** synergistic effect of open-structured and reticular network matrix with metal-N4 coordination induces asymmetric charge distributions with moderate adsorption/desorption behaviour with oxygen ***,this particular Ru-N/C matrix cathode provides a promising Li_(2)O_(2)accommodation space and exhibits superior electrochemical performance in terms of a positive discharge plateau and low charge ***,the assembled batteries also present a high discharge capacity and a long cycle life(exceeding 283 cycles).The density functional theory(DFT)calculations also corroborate the assertion that the Ru-N/C catalyst exhibits robust electronic coupling transfer and superior bifunctional *** such,our work demonstrates that this type of open-structured Ru-N/C matrix is promising for fabricating high-performance quasi solid-state Li-O_(2)batteries.

关键词： ruthenium nitride nitrogen-doped carbon electrocatalyst Li-O_(2)battery

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制药工程专业课程思政建设研究

药学教育 2021年第5期37卷 33-36页

作者：刘艳飞阳华王艳王珊向皞月刘珍宝中南大学化学化工学院长沙410083 中南大学湘雅药学院长沙410013

围绕“新工科”背景,文章对制药工程专业教育与思政教育有机融合的教学开展系统研究,通过课程思政教学目标、教学内容、教学案例、教学方法的设计与实践,构建专业课程思政教育新模式;通过培训与交流,不断提升教师队伍的思政能力;构建激... 详细信息

围绕“新工科”背景,文章对制药工程专业教育与思政教育有机融合的教学开展系统研究,通过课程思政教学目标、教学内容、教学案例、教学方法的设计与实践,构建专业课程思政教育新模式;通过培训与交流,不断提升教师队伍的思政能力;构建激励机制和考评机制,增强实施课程思政的责任感。将显性教育和隐性教育融为一体,帮助专业学生塑造正确的世界观、价值观,为工科专业课程思政的实施提供一定的借鉴与参考。

关键词： “新工科” 制药工程专业课程思政课程改革探索

0Cr16Ni5Mo钢Ф120~160mm棒材成分和力学性能的回归分析

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特殊钢 2015年第2期36卷 60-61页

作者：张秀丽孙永庆梁剑雄杨志勇刘振宝李文辉抚顺特殊钢股份有限公司技术中心抚顺113001 钢铁研究总院特殊钢研究所北京100081

0Cr16Ni5Mo钢由6 t真空感应炉＋电渣重熔工艺冶炼,并锻造成Φ120-160 mm钢材,终锻温度≥900℃,力学性能试样经950℃1 h空冷＋520℃4 h回火处理。对该钢47炉次的棒材回归分析,得到了0Cr16Ni5Mo钢材成分与力学性能的定量回归关系式：σ_s=... 详细信息

0Cr16Ni5Mo钢由6 t真空感应炉＋电渣重熔工艺冶炼,并锻造成Φ120-160 mm钢材,终锻温度≥900℃,力学性能试样经950℃1 h空冷＋520℃4 h回火处理。对该钢47炉次的棒材回归分析,得到了0Cr16Ni5Mo钢材成分与力学性能的定量回归关系式：σ_s=-1043.3＋5507.6[C]-1 177.0[Si]＋212.6[Ni]＋1 160.3[Mo];σ_b=-648.2＋4 136.7[C]-424.7[Si]＋137.2[Ni]＋1 018.4[Mo];A=11.9-137.6[C]＋25.1[Si]-4.9[Ni]-2.5[Cr]-29.9[Mo];A_（kv）=-473.3-451.3[Si]＋103.3[Ni]＋321.3[Mo],其显著性水平为0.1。

关键词： 0Cr16Ni5Mo钢 Ф120~160mm棒材化学成分力学性能回归分析

X20Cr13钢材成分对力学性能影响的回归分析

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特殊钢 2016年第1期37卷 54-56页

作者：张丽娜孙永庆梁剑雄杨志勇刘振宝李文辉抚顺特殊钢股份有限公司技术中心抚顺113001 钢铁研究总院特殊钢研究所北京100081

对钢厂6 t电弧炉+LF+VOD+3 t ESR生产的40 mm×40 mm^80 mm×80 mm X20Cr13不锈钢方钢棒材(/%:0.17~0.22C,0.30~0.80Mn,0.10~0.50Si,0.30~0.80Ni,12.5~14.0Cr)随机抽取89炉次,进行化学成分与力学性能的统计回归分析,得到了该类钢材成分与其力学性能的定量回归关系式:σ_s=704.9+121.9[Ni]-84.9[Mn];σ_b=638.7+51.1[Ni]-40.5[Mn]+16.9[Cr];A=81.8-24.8[C]+2.7[Mn]-4.4[Cr];Z=49.4+47.5[C]+4.8[Si]+4.3[Ni];A_(KV)=-90.8-55.8[Mn]+10.2[Cr]+154.1[Si]。如工艺参数和棒材规格等因素改变时,应重新回归分析,修正方程系数。

关键词： EAF-LF-VOD-ESR工艺 X20Cr13钢力学性能统计回归分析

Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang Pan Yihuang Chen Qiong liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

Preparation and applications of calcium ferrite as a functional material:A review

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 292-310页

作者： Xiuli Han Bowen Duan Lei liu Shilong Fang Weiwei Wang College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources of Hebei Province Tangshan 063210China Key Laboratory of Mining Development and Security Technology of Hebei Province Tangshan 063210China

Calcium ferrite(CF)is recognized as a potential green and efficient functional material because of its advantages of magnetism,electrochemistry,catalysis,and biocompatibility in the fields of materials chemistry,environmental engineering,and ***-fore,the obtained research results need to be systematically summarized,and new perspectives on CF and its composite materials need to be *** on the presented studies of CF and its composite materials,the types and structures of the crystal are *** addition,the current application technologies and theoretical mechanisms with various properties in different fields are ***,the various preparation methods of CF and its composite materials are elaborated in *** importantly,the advantages and disadvantages of the synthesis methods of CF and its composite materials are discussed,and the existing problems and emerging challenges in practical production are ***,the key future research directions of CF and its composite materials have been prospected from the potential application technologies to provide references for its synthesis and efficient utilization.

关键词： calcium ferrite mineral functional materials preparation application perspectives