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Microstructure evolution of single crystal copper wires in cold drawing

Science china(Technological sciences) 2007年第6期50卷 736-748页

作者： CHEN Jian1,2, YAN Wen1,2, WANG XueYan2 & FAN XinHui2 1 Department of Applied Physics, Northwestern Polytechnical university, Xi’an 710072, china 2 School of material Science and chemical {4., Xi’an Technological university, Xi’an 710032, china 1. Department of Applied Physics Northwestern Polytechnical University Xi’an 710072 China 2. School of material Science and chemical engineering Xi’an Technological University Xi’an 710032 China

The deformation microstructure evolution of single crystal copper wires produced by OCC method has been studied with the help of TEM, EBSD; OM. The results show that there are a small number of dendrites; twins in the undeformed single crystal copper wires. However, it is difficult to observe these dendrites in deformed single crystal copper wires. The structure evolution of deformed single crystal copper wires during drawing process can be divided into three stages. When the true strain is lower than 0.94. macroscopic subdivision of grains is not evident,; the microscopic evolution of deformed structure is that the cells are formed; elongated in drawn direction. When the true strain is between 0.94. 1.96, macroscopic subdivision of grains takes place,; the number of microbands located on {111}; cell blocks is much more than that with the true strain lower than 0.94. When the true strain is larger than 1.96, the macroscopic subdivision of grains becomes more evident than that with the true strain between 0.94. 1.96,; S-bands structure; lamellar boundaries will be formed. From EBSD analysis, it is found that part of 100 texture resulting from solidifying is transformed into 111; 112 due to shear deformation, but 100 texture component is still kept in majority. When the true strain is 0.94. the misorientation angle of dislocation boundaries resulting from deformation is lower than 14.. However, when the true strain arrives at 1.96, the misorientation angle of some boundaries will be greater than 50°,; the peak of misorientation angle distribution produced by texture evolution is located in the range between 25°; 30°.

关键词： single crystal copper wires, deformation structure, electron backscattering diffraction, transmission electron microscopy

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Preparation and electrochemical performance of spherical Fe_3O_4.as anode materials for Li-ion batteries

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Science china(Technological sciences) 2009年第11期52卷 3219-3223页

作者： WANG FangBin, CHEN Jie, HUANG KeLong & LIU SuQin College of Chemistry & chemical engineering, Central South university, Changsha 4.0083, china 1. College of Chemistry & chemical engineering Central South University Changsha 410083 China

Fe3O4.nano-powder was prepared by the hydrothermal method. The structure and morphology of the product were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The as-prepared powder has regularly spherical morphology, and the average size of product is about 25 nm. The possible application use of this material as the active mass of anode for rechargeable Li batteries was examined by cyclic voltammeter (CV), galvanostatic charge/*** experimental results showed that this material exhibited large specific capacity at the first cycle, and the discharge and charge capacity retention of this electrode are 37.04. and 4..76%, respectively. Furthermore, the impedance change of Fe3O4.electrode under different cycle number and potential was examined.

关键词： Fe3O4 lithium battery anode electrochemical performance

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Synthesis of a Novel Copper Phthalocyanine-Fullerene Dyad

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Chinese chemical Letters 1997年第9期8卷 811-814页

作者： Wen Feng QIUa Yun Qi LIU Cai Yuan PAN Dao Ben ZHU(Institute of Chemistry, Chinese Academy of sciences, Beijing 100080 Department of material Science and engineering, the university of Scienceand Technology of {4., Hefei 230026) CHINESE ACAD SCI INST CHEMBEIJING 100080PEOPLES R CHINA UNIV SCI & TECHNOL china DEPT MAT SCI & ENGNHEFEI 230026PEOPLES R CHINA

A new copper phthalocyanine-fullerene dyad (CuPc-C-60) was synthesized by Diels-Alder adduct of corresponding CuPc and C-60. The chemical structure of this compound was characterized by elemental analysis, MS, IR, UV-... 详细信息

关键词： Synthesis of a Novel Copper Phthalocyanine-Fullerene Dyad

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Self-assembly structure formation on patterned InP surfaces

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Science china(Technological sciences) 2009年第9期52卷 2732-2736页

作者： SU Ge1,2,CAO LiXin1 & LIU TianZhong3 1 Institute of material Science and engineering,Ocean university of china,Qingdao 266100,china 2 Nanoscale Physics Research Laboratory,School of Physics and Astronomy,the university of Birmingham,Edgbaston,Birmingham B15 2TT,UK 3 College of Food Science and engineering,Ocean university of china,Qingdao 266003,china Institute of material Science and engineering Ocean University of China Qingdao 266100 China Nanoscale Physics Research Laboratory School of Physics and Astronomy the University of Birmingham Edgbaston Birmingham B15 2TT UK College of Food Science and engineering Ocean University of China Qingdao 266003 China

Self-assembly of polystyrene spheres guided by patterned n-type InP substrates has been investigated. InP surfaces were patterned using a variety of methods including wet chemical etching,sputter coating,thermal evaporation,and photo lithography. The self-assembly of polystyrene spheres depended on the appearance of patterns and was affected by the deposition techniques (sputter coating and thermal evaporation) of Au micro-squares. SEM and AFM were used to characterize the surface morphologies.

关键词： self-assembly polystyrene spheres pattern InP surface

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The solid lubricating material experiment device for Shenzhou-7 Spaceship

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Science china(Technological sciences) 2010年第9期53卷 2521-2527页

作者： WANG Ke1,2,REN WeiJia1,WANG ShiDa1 & WENG LiJun3 1 Academy of Opto-Electronics,Chinese Academy of sciences,Beijing 100190,china 2 Graduate university of Chinese Academy of sciences,Beijing 10004.,china 3 Lanzhou Institute of chemical Physics,Chinese Academy of sciences,Lanzhou 730000,china 1. Academy of Opto-Electronics Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of china,and the key is to develop a device which can be fixed reliably outside of the orbital module and can be fetched conveniently by an astronaut during space *** solid lubricating material experiment device needs to be locked reliably in a vibrating and impacting environment during the launch phase,and should meet the requirement that it can be unlocked and fetched reliably by the astronaut wearing an extravehicular spacesuit via simple operations in orbit in an environment of high and low *** for the device we developed,the environmental characteristic of the mission was analyzed,the mechanical analysis and thermal analysis were carried out,and then a mechanism with functions of mechanical locking,structural self-locking and manual unlocking was *** device was verified by a sequence of experiments and was fetched by the astronaut during the flight of the Shenzhou-7 Spaceship.

关键词： manned spaceflight exposure experiment mechanism unlock

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Photoresponsive organogel and organized nanostructures of cholesterol imide derivatives with azobenzene substituent groups

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Progress in Natural Science:materials International 2012年第1期22卷 64-70页

作者： Tifeng Jiao a,b,c,Yujin Wang a,Fengqing Gao a,Jingxin Zhou a,Faming Gao a a Hebei Key Laboratory of Applied Chemistry,College of Environmental and chemical engineering,Yanshan university,Qinhuangdao 066004.china b College of Chemistry & {4.s engineering,Wenzhou university,Wenzhou 325027,china c State Key Laboratory of Solid Lubrication,Lanzhou Institute of chemical Physics,Chinese Academy of sciences,Lanzhou 730000,china [a] Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China [b] College of Chemistry & materials engineering Wenzhou University Wenzhou 325027 China [c] State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Two new cholesterol imide derivatives with azobenzene substituent groups have been *** compounds possess headgroups of hydrogen or methyl units,*** gelation test revealed that a subtle change in the headgroup of azobenzene segment produced a dramatic change in the gelation behavior of both *** compound with headgroups of hydrogen units only gelated N,N-Dimethylformamide(DMF),while the other compound with headgroups of methyl units cannot gelate any solvent tested *** DMF gel and solution of the gelator,the reversible photoisomerization transitions by irradiation with ultraviolet(UV) and visible light are investigated by UV-vis absorption spectra,Fourier transform infrared spectrometer,scanning electron microscope,atomic force microscope,and X-ray diffraction *** UV irradiation of the gel,trans-cis photoisomerization of the azobenzene groups occurs,the change in molecular polarity leads to the breaking of van der Waals interactions,resulting in the gel-sol *** gel can be recovered by the reverse cis-trans photoisomerization after exposure to visible *** and spectral studies reveal that the gelator molecules selfassemble into one-dimensional fibers,which further crossed-linked to form regular *** results afford useful information for the development of new versatile low molecular mass gelators and soft matter.

关键词： Organogel Cholesterol Azobenzene Photoisomerization Soft material

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Inducing effect of Pb(Zr_(0.4.Ti_(0.6))O_3 thin film derived by different processes in BiFeO_3/Pb(Zr_(0.4.Ti_(0.6))O_3 multilayer capacitor at room temperature

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Science china(Technological sciences) 2009年第1期52卷 10-14页

作者： XIE Dan1, ZANG YongYuan1, LUO YaFeng1, REN TianLing1, LIU LiTian1 & DANG ZhiMin2 1 Institute of Microelectronics, Tsinghua university, Beijing 100084. china 2 College of material Science and engineering, Beijing university of chemical Technology, Beijing 100029, china Institute of Microelectronics Tsinghua University Beijing 100084 China College of material Science and engineering Beijing University of Chemical Technology Beijing 100029 China

BiFeO3/PZT multilayer capacitor was prepared on Pt(100)/Ti/SiO2/Si(100) substrate. PZT buffer layer was derived by MOCVD method (label: PZT1) and sputtering method (label: PZT2) respectively. XRD analysis indicated that high (110) orientation of BFO in the BFO/PZT1 structure was achieved. SEM analysis indicated a better microstructure in the BFO/PZT1 structure compared with BFO/PZT2. The remnant polarization of the BFO/PZT1 was 82.5 μC/cm2 at an applied voltage of 8 V, compared with that of 25.2 μC/cm2 in the BFO/PZT2 structure. The BFO/PZT1 multilayer exhibited little polarization fatigue (4.V. The leakage current density was about 2×10?7 A/cm2 at an applied voltage 4.V, in the BFO/PZT1 capacitor. All the results indicated that PZT can act as an inducing layer to the BFO and the MOCVD derived PZT has more inducing effect to the BFO thin film at room temperature.

关键词： BFO PZT MOCVD properties FeRAM

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Crystallization behaviour and high coercivity of (Nd,Pr)_(13)Fe_(80)Nb_1B_6 melt-spun ribbons

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Rare Metals 2009年第3期28卷 253-256页

作者： GUO Pengju LIU Xincai PAN Jing XU Feng LI Yong CUI Ping faculty of materials Science and chemical engineering Ningbo University Ningbo 315211 China Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Ningbo Institute of materials of Technology and engineering Chinese Academy of Sciences Ningbo 315040 China

Amorphous （Nd,Pr）13Fe80Nb1B6 ribbons were crystallized at 670-730°C for 5-25 min to study the effects of isothermal crystallization on their behavior and magnetic properties. XRD results indicate that the isothermal incubation time is 12, 5, and less than 5 min at 670, 700, and 730°C, respectively. High coercivities, with the maximum value of iHc = 1616 kA/m at 700°C for 19 min, measured by a physical property measurement system, are obtained in the crystallized ribbons. This is mainly attributed to the addition of Pr and Nb, because Pr2Fe14. has a higher anisotropic field than Nd2Fe14., and Nb enriched in the grain boundary regions can not only reduce the exchange-coupling effects among hard grains, but also impede grain growth during the crystallization process. In addition, it should also be related to the characteristics of the furnace that the authors designed.

关键词： Nd-Fe-B isothermal crystallization coercivity melt-spun ribbons Pr substitution

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Comparison between Paleozoic and CenozoicLithospheric Mantle in Eastern Part of North china Block: With a Discussion of Mantle Evolution

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Journal of Earth Science 1999年第3期18卷 207-214页

作者： Zheng Jianping Lu Fengxiang(faculty of Earth sciences, china university of geosciences, wuhan 4.0074. china)O’Reilly S. Y. Griffin W. L. Zhang Ming(GEMOC, faculty of Earth sciences, Macquarie university, Sydney, NSW2113, Australia) faculty of Earth sciences China University of Geosciences Wuhan 430074 China GEMOC Faculty of Earth Sciences Macquarie University Sydney NSW2113 Australia

Paleozoic diamond- and xenolith-bearing kimberlites and Cenozoic xenolith-bearing basalts,erupted in the eastern part of the North china block (NCB), provide excellent mantle probes for the research of intra-plate processes and the Phanerozoic evolution of the subcontinental lithosphere mantle (SCLM ). In this study, the mineral inclusions in diamond and xenoliths from Mengyin (Shandong Province) and Fuxian (Liaoning Province) kimberlites were chosen for constraining the nature of the Paleozoic SCLM. while xenoliths from the Shanwang and Qixia basalt (both in Shandong Province) were chosen for constraining the nature of the Cenozoic *** lies astride the Tancheng-Lujiang (Taulu) fault zone, a major lithospheric fault in Eastern china as well as in Eastern Asia, and Qixia lies east of the rault zone. Based on the research of the petrography of mantle xenoliths, petrochemistry, major and the trace element of mantle minerals, lithospheric thermal state, combiued with tbe modern geophysical data, it is concluded that the attenuation and replacement of Paleozoic SCLM by upwelling asthenospheric materials through thermal erosion and possibly delamination resulted in the rormation of irregular-shaPed hot bodies, mainly along weak zones within the mantle- The Tanlu fault zone played an importont role in the Mesozoic-Cenozoic replacemeni or the pre-existing lithospheric mantle.

关键词： asthenospheric material paleo-lithosphere replacement and attenuation thermal erosion mantle weak zone Tancheng-Lujiang fault zone Eastern china

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Influence of MnO_2 on the photocatalytic activity of P-25 TiO_2 in the degradation of methyl orange

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中国科学：化学英文版 2008年第2期51卷 179-185页

作者： LI ShunJun1, MA ZiChuan1,2, WANG Lin1 & LIU JingZe2 1 College of Chemistry and material sciences, Hebei Normal university, Shijiazhuang 050016, china 2 College of Life Science, Hebei Normal university, Shijiazhuang 050016, china College of Chemistry and material sciences Hebej Normal UniversityShijiazhuang 050016China College of Life Science Hebei Normal UniversityShijiazhuang 050016China

Influences of α-MnO2, β-MnO2, and δ-MnO2 on the photocatalytic activity of Degussa P-25 TiO2 have been investigated through the photocatalytic degradation of methyl orange. The TiO2 photocatalyst, before and after being contaminated by MnO2, was characterized by UV-visible diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS). The results showed that photocatalytic activity of TiO2 could be inhibited significantly or completely deactivated due to the presence of even a small amount of MnO2 particles. It was found that the poisoning effect varied with the crystal phases of MnO2 and the effect was in the order δ-MnO2 >α-MnO2 >β-MnO2. The poisoning effect was attributed to the formation of heterojunctions between MnO2 and TiO2 particles. The heterojunctions changed the chemical state of Ti4. and O2 sites in the crystalline phase of TiO2. MnO2 in contact with TiO2 particles also broadens the band-gap of TiO2, which decreases UV absorption of TiO2. It can also create some deep impurity energy levels serving as photoelec-tron-photohole recombination center, which accelerates the electron-hole recombination.

关键词： TiO2 MnO2 deactivation photocatalysis methyl orange

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