Materials Literature
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Eu3 +doped CaWO4 phosphors were prepared via hydrothermal method. The crystal structures,morphologies and luminescence properties of the powders synthesized at different pH values were characterized by X-ray powder diffraction( XRD),field emission-scanning electron microscopy( FE-SEM) and photoluminescence( PL). The e…
有效地得到热扩大系数(CTE ) 三维(3D ) 编织了 C/C composites 和学习变化，有图形的用户接口的一个 VC++ 程序被获得，基于纱单位模型和数字分析。与碳纤维和碳矩阵的有限基本性质， 3D 的 CTE 编织了 C/C composites 在 85 点被获得 ? 蔿??????? 頿 ???? 鄿吗？？
Die vorliegende Arbeit befasst sich mit der experimentellen Untersuchung und numerischen Simulation monolithischer Abgaskatalysatoren unter Berücksichtigung detaillierter Reaktionsmechanismen und Transportprozesse. Dabei wird der Einfluss verschiedener Modellparameter sowie Betriebsbedingungen auf das Umsatzverhalten…
1 Introduction Anhydrous sodium,mainly produced in the United States,Canada,Japan,is indispensable commodities and raw materials in daily life and industry.In recent years,anhydrous sodium sulfate of general size was much oversupplied[1].However particles anhydrous sodium sulphate of large size is not adequate to the…
At the beginning of the 21st century, civil engineers more than ever face the often-contradictory demands for designing larger, safer and more durable structures at a lower cost and in shorter time. Concrete has been used for many centuries as a safe and durable building material. Two of the main advantages of concret…
conformational 和为两个的聚丙烯(PP ) 的动态性质纯与不同的链 tacticity 融化并且相配被 isotactic (iPP ) 的蒙特卡罗模拟调查，协同不能(应用软件) 并且 syndiotactic (sPP ) 聚丙烯。纹理粗糙的 PP 模型的模拟在短期的合并的一个高协作格子和来自旋转同质异构的状态(RIS ) 的相互作用建模的远程的 intramolecular 和丙烷的潜在的功能分别地配对的 Lennard-Jones (LJ ) 上被执行。在二进制 PP/PP 混合的链的动力学与不同的链 taciticity 与 C150H302 的作文被调查。有不同立体化学的 PP 的散开率通常在顺序作为：iP…
与二烃链和一个 adamantane 核心，新奇的第四级的铵 cationic 双子座表面活化剂被三步的反应从 adamantane 设计并且综合。获得的表面活化剂的结构被这些表面活化剂的性质也是的分析和表面由表面紧张大小学习了的 1H NMR， FTIR 和元素证实。这些目标表面活化剂在比典型表面活化剂降低水的表面紧张展出低得多的批评 micelle 集中(CMC ) 和更高的效率。
A new poly ionic liquid( PIL) type adsorbent, poly( vinyl-benzyl-imidazolium) chloride( P[VBnim]Cl) was prepared facilely with overall yield above 75% through free radical polymerization of1-vinylimidazole at 70 ℃ and cross-linking of the resulting polymer with 1,4-bis( chloromethyl) benzene via quaternization reactio…
听双包括当钛增加是超过 0.10 时 ?% 。包括的那些二种类型在井分发，并且能负担得起原子核到团结过程。因此， equiaxed 地区的比率随钛增加的增加增加。从 42.1 的比率增加 ?% ～ 64.0 ? 有从 0.01 增加的钛增加的 %?% ～ 0.10 ?% ，和它增加到 85.7 ?% 当钛增加到达 0.34 时 ?% 。
腐蚀行为超离频在钠氯化物答案的力量钢 30CrMnSiNi2A 被重量损失和电气化学的方法学习。腐蚀产品的形态学用扫描电子显微镜学(SEM ) 被观察，作文用一个精力被分析散光谱学(版本) 和 X 光检查衍射(XRD ) 。试验性的结果证明腐蚀来自 pitting 腐蚀，锈层与小 -FeOOH 由外部锈层 -FeOOH 和内部锈层 Fe2O3 组成。在腐蚀率和测试时间之间的关联与指数的统治一致。极化方法测量的腐蚀电流比在长期的沉浸以后由重量损失方法计算了的高，主要原因是那 -FeOOH， -Fe2O3 由导致的 -FeOOH 转变了过高估计腐蚀率。腐蚀前期的过程从 XRD 和 EIS 结果被获得。腐蚀产品， Fe (哦) 2 在以…
The Al5Mo thin film anodes for Li ion battery were prepared using DC sputtering method in different conditions like deposition at room temperature (S0) and deposition at 300oC (S1). The thin films were deposited from Aluminum target tiled with Molybdenum discs in the ratio calculated on the basis of theoretical sputte…
1-[(1-ethoxycarbonyl)-ethyl]-4-[4-(2,3,5,6-tetrafluoro-4-alkoxy-phenyl)ethynyl)-phenyl] terephthalates have been synthesized(n=5,6,7,8)and studied by thermal polarizing microscopy and DSC measurement.The effect of fluorosubstituent and bridge on the mesomorphic properties were discussed.These compounds exhibit enantio…
Gold nanoparticles were prepared by a bioreduction of chloroauric acid with vine tea powder extracts,and characterized by UV-Vis, TEM and size distribution. The process of biosynthesis was investigated by control variate method. The results show that pH of the reaction solution,temperature and the quantities of the ch…
The effects of precipitates on grain size and mechanical properties of as-cast AZ31-x%Nd magnesium alloy were investigated, and the affecting mechanism was also discussed. The results indicated that Al2Nd phase, Al11Nd3 phase and a few Al-Mn-Nd-Fe phase were formed when adding 0.38 wt.%–1.46 wt.% Nd into AZ31 melt, co…
混合力量来源在电的车辆区域吸引了许多注意。特别地，因为 supercapacitors 的高力量密度，电电的混合 powertrain 系统由 supercapacitor 模块和锂离子电池组成广泛地被使用了。在这研究，我们设计包含在平行和一节锂离子电池的基于电极的 supercapacitor 模块包装的二多孔的碳的一个混合 powertrain 系统。与严峻的车站的构造，使用的 supercapacitor 模块的表演和稳定性在与 supercapacitor 的结构的关联被调查，电极材料的性质适用。到 48.5 V 的从 20 V 的电压颤动的反应时间从 20 A 随应用电流的增加从大约 490 s 在收费或排出的过程期间减…
Lithium-sulfur(Li-S) battery is a promising choice for the next generation of high-energy rechargeable batteries, but its application is impeded by the high dissolution of the polysulfides in commonly used organic electrolyte. Room temperature ionic liquids(RTILs) have been considered as appealing candidates for the e…
Butylene fipronil-loaded microcapsules were prepared by layer-by-layer self-assembly of oppositely charged chitosan and sodium alginate as shell materials. Sodium dodecyl benzene sulfonate was selected as the dispersant by flowing point method. The prepared microcapsules were characterized. The effect of drug loadings…
Hollow microspheres of ZnxCo1-xFe2O4 were synthesized by ultrasonic assisted solvothermal method. The microstructure and morphology of synthesized microspheres were characterized by Xray diffraction(XRD) and transmission electron microscope(TEM). The results show that hollow microspheres of ZnxCo1-xFe2O4 show cubic cr…
一系列代替的帕拉 -- ， fulleropyrrolidine 的 meta-nitrophenyl 和 ortho-nitrophenyl 衍生物被综合由使用不变的吸收和荧光系列在电子性质上调查替换的位置的效果，与 DFT 计算结合了。结果证实替换的位置在吸收和荧光系列上有小效果，而重要效果在他们的 LUMO 精力层次上被观察。理论计算表明 ortho-nitrophenyl 的 LUMO 精力代替了衍生物被增加帕拉替换和元替换的在那些上面的 0.1 eV。ortho 替换的突出的效果被归因于通过空间在空间地关上的撤退电子的 nitro 之间的轨道的相互作用组和 fullerene 笼子。这些调查结果能在提起基于 C60 的电…
La15Fe77B8 hydrogen storage alloys were prepared using a vacuum induction-quenching furnace. The results of X-ray diffraction(XRD) and scanning electron microscopy(SEM) suggested that La15–xSmxFe2Ni76Mn5B2(x=0, 2, 4, 6) alloys had multiphase structure including the main LaNi5 phase, La3Ni13B2 phase and(Fe, Ni) phase.…