Materials Literature
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Vapor Etching(VE)was used to etch diamond wire sawn mc-silicon wafers.The vapor was generated from heating the acid mixture solution of HF-HNO3 in the volume ratio of 1:3(the total volume of the solution is 400mL)at 90 ℃.The results showed that etching for 15 minutes,saw marks can be removed and lots of small corrosio…
Ordered mesoporous carbon (OMC) adsorbents have been prepared using spherical SBA-16 mesoporous silica, as a template. The synthesized materials were studied by X-ray diffraction, scanning electron microscopy and nitrogen adsorption-desorption isotherms. OMCs have been tested for adsorption of dibenzothiophene (DBT) a…
近年来,氢能作为清洁可再生新型能源越来越受到人们关注.然而,氢气储存和运输困难,制约了其广泛利用.因此,寻找一种高效的原位在线制氢技术成为解决这一难题的重要方案之一.二甲醚作为氢的载体,具有高H/C比、高能量密度、无毒和无致癌性等优点,而且二甲醚的物理性质与液化石油气（LPG）相类似,燃烧时不会产生污染性气体,且工业上已实现大规模生产.通过重整技术,可以使二甲醚有效地转化为H2.目前的重整技术主要包括部分氧化重整、自热重整、干重整以及水蒸气重整（SR）.其中二甲醚水蒸气重整（DMESR）技术具有很高的氢气产率,被认为是一种非常有前途的在线制氢技术.二甲醚水蒸气重整反应分两步进行,第一步是固体酸催化剂催化的二甲醚水解反应,第二步是金…
A series of soluble near-infrared absorption amino phthalocyanine dyes were synthesized with preparation of amino phthalonitriles firstly. The structure and performance of phthalocyanines were characterized by 1H NMR, Fourier transform infrared spectroscopy(FT-IR), solution test, UV-visible absorption spectroscopy(UV-…
Chitosan, an excellent biomedical material, has received a widespread in vivo application. In contrast, its metabolism and distribution once being implanted were less documented. In this study, the pharmacokinetics and biodegradation of fluorescein isothiocyanate(FITC) labeled and muscle implantation administrated chi…
因为他们的众多的优点， Cu/Al composites 具有在工业应用的重要重要性。Cu/Al composites 的微观结构和形态学上的结合的温度和冷却的率的影响在这份报纸被调查。在 Cu/Al 接口的界面的形态学和成分阶段被光显微镜学和与精力散的 X 光检查光谱学装备的地排放扫描电子显微镜学分析。结果显示结合的有效 Cu-Al 要求更高的结合温度便于在二金属之间的 interdiffusion。微结构特征与各种各样的结合温度被联系，它影响 interdiffusion 的驱动力。冷却的率在界面的区域对金属间化合的混合物的形态学和数量施加重要影响，这被观察。同时， microhardness 大小证明坚硬与冷却的结合的温度和…
Tetrakis (alkoxycarbonyl ) 卟啉和它的 -octafluoro-substituted 衍生物经由 Lindsey 方法被综合并且转变了到他们的锌建筑群。相应 Zn (II ) 卟啉的单个水晶 X 光检查结构表明 -octafluorination 将由于结合的氢在水晶结构给卟啉一半的更多的紧密相互作用包含氟的符号原子。不平常的六坐标的 Zn (II ) 与中央 Zn (II ) 经由中央取代者的氧原子的 intramolecular 协作被发现。
Plant fiber reinforced polymeric composites are increasingly applied in engineering applications, while the incompatible interface between the hydrophilic cellulose fibers and the hydrophobic polymer matrix remains a bot- tleneck for obtaining high mechanical performances. In this study, carboxyl-functionalized carbon…
Morphology-controllable Cu2SnS3 thin films on Mo-glass were prepared via a facile in situ one-step solvothermal process and used in dye-sensitized solar cells as counter electrodes. The effects of different solvents on the morphology of films were investigated. DSC based on the porous net-like Cu2SnS3 thin film as cou…
Three kinds of Europium complexes,Eu( Hhqc)3( TEL),Eu( Hhqc)3( TPL) and Eu-( Hhqc)3( TBL) were synthesized by the reaction of 2-hydroxyquinoline-4-carboxylic acid( H2hqc)with Eu Cl3·6H2O under the treatment with triethylamine( TEL),tripropylamine( TPL) and tributylamine( TBL),respectively. Three complexes were charact…
分离。依靠答案散开分离机制的传统的聚合的膜服从于在生产率(渗透) 和效率(选择) 之间的折衷，它作为 Robeson 的上面的界限被知道[1 ] 。因为他们基于尺寸和形状分开分子的能力，膜能基于分子的筛材料克服这限制[2， 3  ； and ； 4 ].2。在沸石 membranesA 的成就沸石是无机的分子的筛。不同于非结晶的碳的分子的筛，水晶的沸石包含分子的尺寸的一致地大小的毛孔，它为分子的筛膜使他们成为理想的候选人。最后二十年在沸石膜的合成见证连续进步。几策略和技术为沸石膜的合成被开发了，在原处包括结晶化[5 ] 并且第二等(播种) 生长[6 ] 。在膜性能的重要改进被沸石膜的微观结构优化完成了。例如， Ts…
The mono-and/or few-layers graphene oxide (GO) was synthesized by modified Hummers method. The (GO) incorporated ZnO composites were fabricated by sonochemical method. The X-ray diffraction (XRD) pat- terns of 2.5 wt% GO incorporated composite showed co- existence of GO and ZnO-wurtzite peaks in composite sample. Base…
intercritical X80 管道钢的影响热的地区(ICHAZ ) 被使用 Gleeble-3500 模仿热 / 机械的模拟器根据在职的焊接的热周期。有不同的冷却的率的 ICHAZ 的微观结构被检验，并且坚硬，坚韧和相应金属断面的显微镜观察被调查。结果显示出那 untransformed bainite 和铁酸盐以及 retransformed 罚款 bainite， martensiteaustenite (麻省) 成分组成 ICHAZ 的微观结构。麻省成分的二不同形态学是 stringer 和块。主要 Ti， Nb， C， Fe 和 Cu 创作了的第二个阶段粒子在 ICHAZ 变粗。与焊接状况的正常相比，当因为大区域部分…
Syngas is a main product from dry reforming of methane (DRM) which is efficient reaction to convert two main greenhouse gases (CH4 and CO2) into hydrogen and carbon monoxide with H2/CO ratio equal to 1. This study investigated the bimetallic NiCo on alumina-supported catalysts prepared by sol-gel method with different…
爬 Super304H 奥氏体的钢的行为在 923973K 的提高的温度并且在 190210MPa 的应用应力被调查了。结果证明在 creep 变丑的明显的压力代表和激活精力分别地在不同温度从 16.2 ～ 27.4 并且从 602.1 到 769.3kJ/mol。这些高价值由于在脱臼之间的一个相互作用暗示一个阀值压力的存在并且 Cu 富有猛抛在期间爬变丑。creep 机制与脱臼爬被联系由矩阵格子散开管理了。阀值压力的起源主要被归因于在矩阵导致由的连贯紧张 Cu 富有猛抛。理论上估计的阀值压力从 Cu 富有猛抛与试验性的结果相当同意。
Currently, the topological behavior of materials is a hot topic in condensed matter physics. As a new class of topological quantum states, Weyl semimetals have attracted extensive interest. Taking the pyrochlore iridates A2Ir2O7(A=Y or rare earth element) as an example, we discuss the novel properties of Weyl semimeta…
试验性、数字的模拟被承担在压力酒吧(SHPB ) 试验的裂口 Hopkinson 在压力波浪上估计有瑕疵的条件的效果。photonic Doppler velocimetry (PDV ) 测量结果证明一个事件的上升和秋天时间与一个增加的倾斜角度挥动增加；另外，事件波浪的变化随倾斜角度的增加逐渐地消失。为在 SHPB 的各种各样的缺点的下列特征被数字模拟获得：(1 ) 一个弄弯的酒吧的影响是可以忽略的；(2 ) 错误排列平常地影响变化特征，并且弯曲飘动以这个条件被产生；(3 ) 影响结束表面的倾斜和缩进在这个事件上有大影响波浪，和他们俩由增加缺点的度增加事件波浪的上升时间。鉴于在 SHPB 的结果，错误排列，倾向，和缩进，实验应该…
在阳极的氧化铝层的常规 nanopore 安排上的铝底层的微观结构的效果被调查。铝板上的不一样的微观结构和质地被各种各样的冷滚动和热处理准备，并且阳极的氧化铝 nanoporous 层被在草酸酸答案在 40V 阳极化方法的二步制作。为有除了纯净的类似的表面质地和退火的状况的铝板，阳极的氧化铝层上的 nanopore 安排的整齐与铝底层的纯净增加了。艾尔表上的表面质地的差别不与纯净和底层铝的热处理相比是为订的 nanopore 数组的形成的批评参数。调查建议纯净和铝底层的合理退火温度是很重要的过程在阳极的氧化铝层上获得高度命令的 nanopore 数组。
Five amino-functionalized mesoporous materi- als were directly synthesized by an evaporation-induced self-assembly method. A series of environmentally friendly surfactants as templates were used, including dimethyl dioctadecyl ammonium bromide, polyethylene glycol (PEG), alkyl polyglucoside, and cetyl dimethyl betaine…
The through-thickness corrosion inhomogeneity of 7050-T7451 Al alloy thick plate was studied using immersion tests, potentiodynamic polarization, electrochemical impedance spectroscopy(EIS), slow strain rate testing(SSRT) technique combined with optical microscopy(OM), scanning electron microscopy(SEM) and transmissio…