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Formation and growth of nanophase iron particles on the surface of Mercury revealed by experimental study

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Acta Geochimica 2024年第4期43卷 774-784页

作者： Ronghua Pang Yang Li Chen Li Pengfei Zhang Zhuang Guo Sizhe Zhao Han Yu Li Wang Chenxi Zhu Shuangyu Wang Kairui Tai Qinwei Zhang Yuanyun Wen Rui Li Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyangChina University of Chinese Academy of Sciences BeijingChina Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefeiChina Institute of Remote Sensing and Geographical Information System School of Earth and Space SciencesPeking UniversityBeijingChina State Key laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacaoChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunmingChina State Key laboratory of High Performance ceramics and Superfi ne Microstructures Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbinChina Research Center for Planetary Science College of Earth ScienceChengdu University of TechnologyChengduChina Key laboratory of Planetary Sciences Purple Mountain ObservatoryChinese Academy of SciencesNanjingChina

Space weathering is a primary factor in altering the composition and spectral characteristics of surface materials on airless ***,current research on space weathering focuses mainly on the Moon and certain types of *** particular,the impacts of meteoroids and micrometeoroids,radiation from solar wind/solar flares/cosmic rays,and thermal fatigue due to temperature variations are being *** weathering produces various transformation products such as melted glass,amorphous layers,iron particles,vesicles,and solar wind *** in turn lead to soil maturation,changes in visible and near-infrared reflectance spectra(weakening of characteristic absorption peaks,decreased reflectance,increased near-infrared slope),and alterations in magnetism(related to small iron particles),collectively termed the“lunar model”of space weathering *** to the Moon and asteroids,Mercury has unique spatial environmental characteristics,including more intense meteoroid impacts and solar thermal radiation,as well as a weaker particle radiation environment due to the global distribution of its magnetic ***,the lunar model of space weathering may not apply to *** studies have extensively explored the eff ects of micrometeoroid ***,this work focuses on the eff ects of solar-wind particle radiation in global magnetic-field distribution and on the weathering transformation of surface materials on Mercury under prolonged intense solar *** the utilization of highvalence state,heavy ion implantation,and vacuum heating simulation experiments,this paper primarily investigates the weathering transformation characteristics of the major mineral components such as anorthite,pyroxene,and olivine on Mercury’s surface and compares them to the weathering transformation model of the *** experimental results indicate that ion implantation at room temperature is insufficient to generate np-Fe^(0)directly but

关键词： Mercury Space weathering Np-Fe^(0) Solar thermal radiation Solar wind

Study on metal recovery process and kinetics of oxidative leaching from spent LiFePO_(4)Li-batteries

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Chinese Journal of Chemical Engineering 2024年第4期68卷 94-102页

作者： Xiaoming Zhang Wen Xie Xiaolei Zhou Wenjie Zhang Jiawei Wen Xin Wang Guoyong Huang Shengming Xu College of New Energy and Materials China University of PetroleumBeijing 102249China State Key laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China Beijing Spacecrafts Beijing 100094China Ganfeng Lithium Group Co. Ltd.Xinyu 338000China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Beijing Key laboratory of Fine ceramics Tsinghua UniversityBeijing 100084China

A green environmental protection and enhanced leaching process was proposed to recover all elements from spent lithium iron phosphate(LiFePO_(4)) lithium *** order to reduce the influence of Al impurity in the recovery process,NaOH was used to remove *** impurity removal,the spent LiFePO_(4) cathode material was used as raw material under the H_(2)SO_(4) system,and the pressure oxidation leaching process was adopted to achieve the preferential leaching of *** E-pH diagram of the Fe-P-Al-H_(2)O system can determine the stable region of each element in the recovery process of spent LiFePO_(4)*** the optimal conditions(500 r·min^(-1),15 h,363.15 K,0.4 MPa,the liquid-solid ratio was 4:1 ml·g^(-1)and the acid-material ratio was 0.29),the leaching rate of Li was 99.24%,Fe,Al,and Ti were 0.10%,2.07%,and 0.03%,*** Fe and P were precipitated and recovered as FePO_(4)·2H_(2)*** kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO_(4) materials depends on the surface chemical *** the life cycle assessment(LCA)of the spent LiFePO_(4) whole recovery process,eight midpoint impact categories were selected to assess the impact of recovery *** results can provide basic environmental information on production process for recycling industry.

关键词： Spent LiFePO_(4)Li-batteries Oxidative leaching Kinetic study Life cycle assessment

AgSbTe基热电材料的分解行为研究（英文）

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Science China Materials 2024年

作者：吴一仇鹏飞孙传耀苑鑫杰邓婷婷史迅 State Key laboratory of High Performance ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences

摘要近年来,AgSbTe2基三元硫族化合物因其在中温区的高热电性能获得了热电领域的广泛关注.但是,AgSbTe2基三元硫族化合物稳定性引起了巨大争议,之前文献报道了不一致甚至彼此矛盾的结果.本文以Ag0.9Sb1.1Te2.1为例,系统研究了其分解行为...

摘要近年来,AgSbTe2基三元硫族化合物因其在中温区的高热电性能获得了热电领域的广泛关注.但是,AgSbTe2基三元硫族化合物稳定性引起了巨大争议,之前文献报道了不一致甚至彼此矛盾的结果.本文以Ag0.9Sb1.1Te2.1为例,系统研究了其分解行为,探讨了AgSbTe2基硫族化合物的稳定性.研究发现,Ag0.9Sb1.1Te2.1在473–643 K温度范围内有明显的分解,但分解速率随温度的升高表现出非单调变化,在573 K附近达到最大值.Ag0.9Sb1.1Te2.1并非直接分解为Ag2Te和Sb2Te3,而是先形成Ag2Te和一种具有不同堆积单元的Ag–Sb–Te三元层状化合物.该三元层状化合物转变为最终的分解产物Sb2Te3非常缓慢.此外,在分解温度范围以上,分解产物可以快速重新反应生成Ag0.9Sb1.1Te2.1单相.最后,本工作绘制了Ag0.9Sb1.1Te2.1的时间温度转变图,可直观地反应其热力学和动力学控制的分解行为.本工作有望结束长期以来关于AgSbTe2基硫族化合物稳定性的争议,并指导今后该类材料稳定性的研究.

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Effect of Zircon Addition on Properties of Corundum Porous Materials

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China's Refractories 2024年第1期33卷 7-13页

作者： CHEN Haonan LIU Xin ZHANG Shiming LI Ying WANG Di JIA Quanli Henan Key laboratory of High Temperature Functional ceramics School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450052China Henan Building Materials Research and Design Institute Co. Ltd.Zhengzhou 450002China

This paper aims to improve the corrosion resistance of dispersive purging *** fused corundum particles and fine powder,α-Al_(2)O_(3) micropowder,Cr_(2)O_(3) micropowder,Guangxi clay and zircon powder were used as the main raw *** mass ratio of white fused corundum particles and fine powder was fixed at 85:15,and 0,1%,2%,or 3%(by mass)of zircon fine powder was added to replace the same amount of white fused corundum fine *** corundum porous material was prepared by the particle stacking pore-forming method at 1650℃for 3 *** effect of the zircon addition on the properties and microstructure of porous materials was *** results show that:after adding zircon,the permeability of the porous material increases,the cold and hot strengths increase obviously,and the expansion rate after firing *** the addition of zircon is 2%,the comprehensive performance of the specimen is optimal with the smallest linear change rate and the highest permeability.

关键词： porous materials zircon fines purging plug permeability

Automatic Damage Detection of Engineering ceramics Ground Surface Based on Texture Analysis

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Transactions of Tianjin University 2013年第4期19卷 267-271页

作者：林滨陈善功韩雪松梁小虎 Key laboratory of advanced ceramics and Machining Technology of Ministry of Education Tianjin University

Ground textures seriously interfere with the exact identification of grinding damage. The common nondestructive testing techniques for engineering ceramics are limited by their difficulty and cost. Therefore, this paper proposes a global image reconstruction scheme in ground texture surface using Fourier transform (FT). The lines associated with high-energy frequency components in the spectrum that represent ground texture information can be detected by Hough transform (HT), and the corresponding high-energy frequency components are set to zero. Then the spectrum image is back-transformed into the spatial domain image with inverse Fourier transform (IFT). In the reconstructed image, the main ground texture information has been removed, whereas the surface defects information is preserved. Finally, Canny edge detection is used to extract damage image in the reconstructed image. The experimental results of damage detection for the ground texture surfaces of engineering ceramics have shown that the proposed method is effective.

关键词： engineering ceramics damage detection ground texture Fourier transform

The preparation and performance analysis of zirconium-modified aluminum phosphate-based high-temperature(RT-1500℃)resistant adhesive for joining alumina in extreme environment

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Journal of advanced ceramics 2024年第7期13卷 911-932页

作者： Jingxuan Liu Yange Wan Bo Xiao Jiancun Li Zhanming Hu Ruoyu Zhang Xiaoxia Hu Jiachen Liu Guoshuai Cai Hongli Liu Mingchao Wang College of Science Civil Aviation University of ChinaTianjin 300300China Department of Safety Engineering Civil Aviation University of ChinaTianjin 300300China Binzhou Beicheng Construction Engineering Materials Testing Co. Ltd.Binzhou 256602China Department of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China School of Materials and Engineering Key Lab of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China

High-temperature-resistant adhesives are critical materials in the aerospace *** zirconium-modified aluminum phosphate-based adhesives developed in this work had the advantage of adjustable thermal expansibility,achieving a high matching of coefficient of thermal expansion(CTE)with *** introduction of zirconium can significantly improve the thermal stability of the adhesive matrix,and the Zr/Al ratio substantially affects the various reaction processes inside the adhesive,especially the types of zirconium-containing *** of the zirconium-containing compounds in the A7Z3 adhesive were ZrO2 only when the mass ratio of zirconium hydroxide to aluminum hydroxide was 3:7,which was the key reason why it had the highest *** room-temperature bonding strength of A7Z3 after heat treatment at 1500℃reached 67.2 *** pretreatment at 1500℃,the high-temperature bonding strength of A7Z3 was greater than 50 MPa in the range of(room temperature)RT-1000℃.After 40 thermal cycles between RT and 1500℃,the bonding strength still reached 10 *** bonding occurred at temperatures below 1000℃,while chemical bonding dominated above 1000℃based on the generation of Al5BO9 and mullite at the interfaces.

关键词： high-temperature-resistant adhesive thermal expansion property zirconium-modified aluminum phosphate bonding performance thermal cycling bonding mechanism

Ti_(3)C_(2)T_(x)MXene wrapped,carbon-coated porous Si sheets for improved lithium storage performance

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Chinese Chemical Letters 2024年第2期35卷 617-621页

作者： Hui Cheng Yueming Liu Zhongling Cheng Xianying Wang Na Huang Haijiao Zhang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China Shanghai Key laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China Energy Materials Research Center AG Hydrogen Materials & Devices CAS Key Laboratory of Materials for Energy ConversionShanghai Institute of CeramicsChinese Academy of Sciences (SICCAS)Shanghai 200050China

Si-based materials have shown great potential as lithium-ion batteries(LIBs)anodes due to their natural reserves and high theoretical ***,the large volume changes during cycles and poor conductivity of Si lead to rapid capacity decay and poor cycling stability,ultimately limiting their commercial ***,we have skillfully utilized the microporous MCM-22 zeolite as the unique silicon source to produce porous Si(pSi)sheets by a simple magnesiothermic reduction,followed by a carbon coating and further Ti_(3)C_(2)T_(x)MXene assembly,obtaining the ternary pSi@NC@TNSs *** the design,porous Si sheets provide more active sites and shorten Li-ion transport paths for electrochemical *** N-doped carbon(NC)layer serves as a bonding layer to couple pSi and Ti_(3)C_(2)T_(x).The conductive network formed by 2D Ti_(3)C_(2)T_(x)and medium NC layer effectively enhances the overall charge transport of the electrode material,and helps to stabilize the electrode ***,the as-made pSi@NC@TNSs anode delivers an improved lithium storage performance,exhibiting a high reversible capacity of 925 mAh/g at 0.5 A/g after 100 *** present strategy provides an effective way towards high-performance Si-based anodes for LIBs.

关键词： Si anodes Ti_(3)C_(2)Ti_(x)MXene Porous structure Interfacial assembly Lithium-ion batteries

Effect of nano-graphite on mechanical properties and oxidation resistance of ZrB_(2)-SiC-graphite electrode ceramics

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Journal of Iron and Steel Research International 2024年第6期31卷 1502-1513页

作者： Bo-lin Yang Chang-liu Kuang Zheng-long Liu Chao Yu Cheng-ji Deng Jun Ding The State Key laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

ZrB_(2)-based ceramic composites were prepared by spark plasma sintering using ZrB_(2) powder prepared by molten salt method as raw material and SiC and nano-graphite as *** effects of nano-graphite addition on the physical properties and oxidation resistance of ZrB_(2)-based ceramic samples were *** results show that the addition of an appropriate amount of nano-graphite can effectively improve the density of ZrB_(2)-based ceramic composites and improve the physical properties of the *** flexural strength of the ceramic sample with 8 vol.%nano-graphite reached 418.54 MPa,which was 53.14% higher than that of ZrB_(2)-SiC ceramic material(273.31 MPa),and its oxidation resistance was also significantly *** demonstrats that the addition of an appropriate amount of nano-graphite can effectively improve the physical properties and oxidation resistance of ZrB_(2)-SiC ceramic *** prolonging its service life in application and promoting the development of ZrB_(2)-based ceramic composites,it is of great significance for clean steel smelting.

关键词： ZrB_(2)-SiC-graphite electrode ceramic ZrB_(2)-based ceramic composite Nano-graphite Physical property Oxidation resistance

Confusing Object Detection: A Survey

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Computers, Materials and Continua 2024年第3期80卷 3421-3461页

作者： Tong, Kunkun Zou, Guchu Tan, Xin Gong, Jingyu Qi, Zhenyi Zhang, Zhizhong Xie, Yuan Ma, Lizhuang School of Computer Science and Technology East China Normal University Shanghai 200062 China Shanghai Institute of ceramics Chinese Academy of Sciences Shanghai 200050 China

Confusing object detection (COD), such as glass, mirrors, and camouflaged objects, represents a burgeoning visual detection task centered on pinpointing and distinguishing concealed targets within intricate backgrounds, leveraging deep learning methodologies. Despite garnering increasing attention in computer vision, the focus of most existing works leans toward formulating task-specific solutions rather than delving into in-depth analyses of methodological structures. As of now, there is a notable absence of a comprehensive systematic review that focuses on recently proposed deep learning-based models for these specific tasks. To fill this gap, our study presents a pioneering review that covers both the models and the publicly available benchmark datasets, while also identifying potential directions for future research in this field. The current dataset primarily focuses on single confusing object detection at the image level, with some studies extending to video-level data. We conduct an in-depth analysis of deep learning architectures, revealing that the current state-of-the-art (SOTA) COD methods demonstrate promising performance in single object detection. We also compile and provide detailed descriptions of widely used datasets relevant to these detection tasks. Our endeavor extends to discussing the limitations observed in current methodologies, alongside proposed solutions aimed at enhancing detection accuracy. Additionally, we deliberate on relevant applications and outline future research trajectories, aiming to catalyze advancements in the field of glass, mirror, and camouflaged object detection. © 2024 The Authors. Published by Tech Science Press.

关键词： Mirrors