检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

聚丙烯/尼龙1010的形态与性能

天津大学学报（自然科学与工程技术版） 2001年第6期34卷 757-760页

作者：谢志民宋凯绪盛京张丁浩天津大学材料科学与工程学院天津300072 天津大学化工学院天津300072

研究聚丙烯 /尼龙 10 10 (PP/ PA10 10 =90 / 10 ,体积比 )的形态与力学性能关系 .应用在线光散射技术和扫描电镜考查了共混体系的背散射光斑的积分强度、相关距离和分散相的粒径分布 .结果表明 ,该体系在共混 1min以后形态趋于稳态 ,... 详细信息

研究聚丙烯 /尼龙 10 10 (PP/ PA10 10 =90 / 10 ,体积比 )的形态与力学性能关系 .应用在线光散射技术和扫描电镜考查了共混体系的背散射光斑的积分强度、相关距离和分散相的粒径分布 .结果表明 ,该体系在共混 1min以后形态趋于稳态 ,这一规律同时反映在材料的宏观力学性能上 .另外。

关键词：形态发展光散射聚丙烯尼龙1010 力学性能微观结构聚合物合金材料

CrN supported by carbon nanosheets as efficient catalysts toward oxygen reduction reaction and Zn-air batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 4973-4981页

作者： Ya-Ting Zhang Fan Zhang Zhe Lu Jun-Ming Luo Su-Yang Feng Qi Wang Hui Chen hao-Ming Wu zheng-Pei Miao Bin Chi Neng Yu Cheng-Hang You Jing Li Xin-Long Tian school of Chemistry and Chemical Engineering School of Marine Science and EngineeringHainan Provincial Key Lab of Fine ChemistryHainan University State Power Investment Group Hainan Electric Power Co.Ltd. Key Laboratory of Fuel Cell technology of Guangdong Province Shenzhen Automotive Research Institute Beijing Institute of Technology State Key Laboratory of Nuclear Resources and Environment East China University of Technology

Exploring non-precious efficient oxygen reduction reaction （ORR） catalysts is of great significance to fuel cells and Zn-air batteries （ZABs）.CrN is a theoretically promising ORR catalyst,but its potential needs to be unlocked by proper supports that provide high conductivity and high exposure of active *** this work,we introduce a novel synthesis of carbon nanosheets-supported CrN nanoparticles （CrN/C） by annealing the mixture of CrCl3,1,10-phenanthroline and melamine via a two-step *** prepared CrN/C materials show good ORR activity and stability in acidic and alkaline *** optimal CrN/C material has an ORR half-wave potential of 0.73 and 0.72 V （*** hydrogen electrode） in acidic and alkaline media,*** it retains 82% and 78% of ORR current density in acidic and alkaline media after durability tests,***,the optimal CrN/C material-based self-breathing ZABs deliver a maximum power density of 168 mW·cm-2,which is one of the highest among transition metal nitrides-based ZABs It is found that the ORR activity of CrN/C materials is highly related to the Cr–N valence *** work highlights the good potential of CrN as robust ORR catalyst and verifies its promising application in ZABs.

关键词： Carbon nanosheets CrN Fuel cells Oxygen reduction reaction Zn-air batteries

The Application Research of Micro-powdery TiO2—UV Photo Catalytic Oxidization Technique in the Dyeing Water Treatment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The Application Research of Micro-powdery TiO2—UV Photo Cat...

第七届国际粉体检测与控制学术会议

作者： Wu Di~1 ding Zhonghao~2 ~1 school of Chemical Engineering and Environmental Resources Wuhan university of science and technology 430081,Cina ~2 school of Environment & Urban Construction Wuhan university of science and Engineering 430073,china

In the research miero-powdery semi-conductor photo catalytic oxidization process has been employed to treat dyeing *** the photo catalytic oxidization reaction happen,the surface of micro-powdery semi-conductor TiO which exposed under the UV-light would produce many positive holes and electrons,both of them are high-activity,therefore they can destroy auxochromous group and chromogenic group existing in the dyeing water in order to treat the dyeing wa- *** article first of all studied the factors affecting the photo degradation rate of a couple dye stuff-disperse scarlet and reactive brilliant blue,including initial concentration of the dye,TiO quantity,the solution’s initial pH and the treat *** the best condition for the photo degradation has *** the energy consumption is 2100kW, as to the disperse scarlet,the most appropriable concentration for treating is 0.05g per liter,the best time for reaction is 70 minutes,and the most suitable quantity for TiO is 180mg per liter;as to the reactive brilliant blue,the most appro- priable concentration is 0.03g per liter,the best time for reaction is 70 minutes,and the most suitable quantity for TiO is 200mg per *** the mechanism of the effect of pH value has been analyzed.

关键词： Dyeing Wastewater Photo Catalytic Oxidant Micro-powdery Titanium Dioxide

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

温拌沥青混合料拌合压实特性研究

武汉理工大学学报 2010年第1期32卷 61-64页

作者：周燕陈拴发郑木莲张凯长安大学特殊地区公路工程教育部重点实验室西安710064 长安大学材料科学与工程学院西安710061 北京交通大学土木建筑工程学院北京100044 山东交通学院济南250023

温拌沥青混合料是一种节能、环保的新型路面新材料,可在较低的温度下拌和及压实。对改性沥青结合料进行了针入度、软化点、延度、粘度等试验,分析了粘度对拌合压实性能的影响,并探讨了温拌沥青混合料的拌合压实温度和拌合工艺。结果表明... 详细信息

温拌沥青混合料是一种节能、环保的新型路面新材料,可在较低的温度下拌和及压实。对改性沥青结合料进行了针入度、软化点、延度、粘度等试验,分析了粘度对拌合压实性能的影响,并探讨了温拌沥青混合料的拌合压实温度和拌合工艺。结果表明:加入改性剂后,沥青结合料和混合料的高温稳定性能提高,而低温性能有一定的降低。根据各温度条件下的物理力学指标提出了适宜的拌合压实温度和施工工艺。

关键词：温拌沥青混合料改性沥青粘度拌合压实温度施工工艺

Magnetic Interactions with Strain Gradient in Ultrathin Pr_(0.67)Sr_(0.33)MnO_(3) Films

在线全文

学校读者我要写书评

暂无评论

Engineering 2024年第9期40卷 158-165页

作者： Bangmin Zhang Ping Yang Jun ding Jingsheng Chen Gan Moog Chow Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of PhysicsSun Yat-sen UniversityGuangzhou 510275China Singapore Synchrotron Light Source National University of SingaporeSingapore 117603Singapore Department of materials science and Engineering National University of SingaporeSingapore 117575Singapore

Strain gradient is a normal phenomenon around a heterostructural interface in ultrathin film,and it is important to determine its effect on magnetic interactions to understand interfacial *** this work,ultrathin Pr_(0.67)Sr_(0.33)MnO_(3)(PSMO)films on different substrates are *** PSMO film under different in-plane strain conditions,the saturated magnetization and Curie temperature can be qualitatively explained by double-exchange interaction and the Jahn-Teller ***,the difference in the saturated magnetization with zero field cooling and 5 T field cooling is proportional to the strain ***-gradient-induced structural disorder is proposed to enhance phonon-electron antiferromagnetic interactions and the corresponding antiferromagnetic-to-ferromagnetic phase transition via a strong magnetic field during the field cooling process.A non-monotonous structural transition of the MnO_(6) octahedral rotation can enlarge the strain gradient in PSMO film on a SrTiO_(3) *** work demonstrates the existence of the flexomagnetic effect in ultrathin manganite film,which should be applicable to other complex oxide systems.

关键词： Strain gradient Manganite film Octahedral rotation Flexomagnetic Magnetic interactions Phase transition

Effect of Post-weld Heat Treatment on the Microstructure and Mechanical Properties of 2.25Cr-1Mo-0.25V Ultra-Thick Steel Plate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1104-1114页

作者： Yanyang Wu Zongye ding Wenquan Lu Jingchao Hou Qiaodan Hu Jianguo Li Shanghai Key Laboratory of materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China school of Mechatronic Engineering and Automation Foshan UniversityFoshan528225GuangdongChina WuYang Iron and Steel Wugang450000HenanChina

Ensuring the homogeneous and excellent mechanical properties of 2.25Cr-1Mo-0.25V ultra-thick steel plate is the key to the production of hydrogenation reactor ***,it is required to understand the heterogeneity of microstructures and properties of ultra-thick plate after heat *** this work,the effect of post-weld heat treatment(PWHT)on the strength,plasticity,toughness and microstructures of the 193-mm-thick steel plate was investigated,and the formation mechanism of heterogeneity was *** PWHT decreased the room-and high-temperature yield strength(YS)and ultimate tensile strength(UTS)of the steel plate after normalizing and tempering(NT),while the room-and high-temperature YS and UTS decreased from the surface to the center of 193-mm-thick steel *** was attributed to the enhanced decomposition of martensite-austenite(M-A)constituents and coarsening of grains and precipitated carbides.

关键词： Cr-Mo steel Ultra-thick steel plate Microstructure Mechanical properties Heterogeneity

Coaxial Wet Spinning of Boron Nitride Nanosheet‑Based Composite Fibers with Enhanced Thermal Conductivity and Mechanical Strength

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第2期16卷 126-138页

作者： Wenjiang Lu Qixuan Deng Minsu Liu Baofu ding Zhiyuan Xiong Ling Qiu Tsinghua Shenzhen International Graduate school(TSIGS) Tsinghua UniversityShenzhen 518055People’s Republic of China Monash Suzhou Research Institute(MSRI) Monash UniversitySuzhou 215000People’s Republic of China Faculty of materials science and Engineering/Institute of technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Shenzhen Key Laboratory of Energy materials for Carbon Neutrality Shenzhen 518055People’s Republic of China school of Light Industry and Engineering South China University of TechnologyGuangzhou 510614People’s Republic of China

Hexagonal boron nitride nanosheets(BNNSs)exhibit remarkable thermal and dielectric ***,their self-assembly and alignment in macroscopic forms remain challenging due to the chemical inertness of boron nitride,thereby limiting their performance in applications such as thermal *** this study,we present a coaxial wet spinning approach for the fabrication of BNNSs/polymer composite fibers with high nanosheet *** composite fibers were prepared using a superacid-based solvent system and showed a layered structure comprising an aramid core and an aramid/BNNSs ***,the coaxial fibers exhibited significantly higher BNNSs alignment compared to uniaxial aramid/BNNSs fibers,primarily due to the additional compressive forces exerted at the core-sheath interface during the hot drawing *** a BNNSs loading of 60 wt%,the resulting coaxial fibers showed exceptional properties,including an ultrahigh Herman orientation parameter of 0.81,thermal conductivity of 17.2 W m^(-1)K^(-1),and tensile strength of 192.5 *** results surpassed those of uniaxial fibers and previously reported BNNSs composite fibers,making them highly suitable for applications such as wearable thermal management *** findings present a promising strategy for fabricating high-performance composite fibers based on BNNSs.

关键词： Boron nitride nanosheets Coaxial fiber Interfacial compression Nanosheet aligning Wearable thermal management

Computational manufacturing

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:materials International 2002年第9期 3-10页

作者： ding Han and XIONG Youlun(1. school of Mechanical Engineering, Shanghai Jiaotong university, Shanghai 200030, china 2. school of Mechanical Engineering & science, Huazhong university of Sci. & Tech., Wuhan 430074, china) school of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China school of Mechanical Engineering & science Huazhong University of Sci. & Tech. Wuhan 430074 China

This paper presents a general framework for computational manufacturing. The methodology of computational manufacturing aims at integrating computational geometry, machining principle, sensor information fusion, optimization, computational intelligence and virtual prototyping to solve problems of the modeling, reasoning, control, planning and scheduling of manufacturing processes and systems. There are three typical problems in computational manufacturing, i.e., scheduling (time-domain), geometric reasoning (space-domain) and decision- making (interaction between time-domain and space-domain). Some theoretical fundamentals of computational manufacturing are also discussed.

关键词： computational manufacturing geometric reasoning computational Intelligence Internet-based control and maintenance virtual prototyping.

Hydrogen peroxide,an important signal inducing vessel occlusions and stimulating sesquiterpene accumulation in stems of Aquilaria sinensis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hydrogen peroxide,an important signal inducing vessel occlus...