Materials Literature
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The blue-green emitting Eu2+ and Nd3+ doped polycrystalline barium aluminate(BaAl2O4:Eu2+,Nd3+) phosphor, was prepared by a solution-combustion method at 500 oC without a post-annealing process. The characteristic variation in the structural and luminescence properties of the as-prepared samples was evaluated with reg…
The inhibitive action of two natural compounds—henna and rosemary extracts, on the corrosion of 304L stainless steel in 3.5% NaCl solution has been investigated through electrochemical techniques and surface analysis. Polarization measurements indicate that the investigated compounds are mixed type inhib itors, and th…
Nd3+-doped phosphate laser glass with the composition of 64P205-5.9A12O3-7.1K2O-19BaO-4.0Nd203(Wt%)was prepared by means of reaction atmosphere dehydration process.The dehydration efficiencies of O2+POCl3and O2+SOCl2were studied,and the influence of identical dehydrator on the fluorescence lifetime of the prepared Nd3…
Facile deposition of a water-splitting catalyst on low-cost electrode materials could be attractive for hydrogen production from water and solar energy conversion. Herein we describe fast electrodeposition of cobalt-based water oxidation catalyst(Co-WOC) on simple graphite electrode for water splitting. The deposition…
十五重型柴油机车辆被使用驾驶周期和燃料经济周期的典型的重税在底盘测力计上测试。从 exhaust 的空气被 2,4-dinitrophenyhydrazine 子弹取样， 23 羰基混合物被高效液体层析分析。羰基的平均排放因素是 97.2 mg/km，比轻型的柴油机车辆和汽油动力的车辆的高。甲醛，乙醛，丙酮和 propionaldehyde 是有最高的排放因素的种类。为羰基排出物的主要影响因素是车辆类型，平均速度和调整排放标准，并且车辆装载的影响不在这研究是明显的。从车辆用尽的柴油机的羰基的国家排放为中国被计算， 2011，基于两个，车辆英里旅行了并且燃料消费。柴油机车辆的羰基排放被估计是 45.8 Gg，并且比得上汽油动力的车辆…
The effects of Ni content and heat-treatment process on the toughness of a super ferritic stainless steel with26 wt% Cr and 3.5 wt% Mo were investigated. It was found that with the increase of Ni content, the Charpy impact toughness improved remarkably, and transformed from cleavage brittle fracture to the most ductil…
In this paper we study the surface absorption of graphene nanoparticles on Rhodamine 6G molecules and electron transfer from dye molecules to Diamond nanoparticles using laser induced fluorescence spectroscopy. Second harmonic of ND:YAG laser with wavelength of 532 nm is used for excitation. Our results indicate that…
A mathematic model has been presented to predict the decarburization kinetics of grain-oriented silicon steel sheet in the gas mixture of N2–H2–H2O during annealing.This model is based on the carbon flux balance between the oxidation reaction at the surface and the carbon diffusion inside the steel sheet.It can be num…
In this study, the outstanding biocompatibility of silk fibroin( SF) and the highly efficient anti-bacterial effect of nano silver( NS) were utilized to prepare SF / NS composite film with antibacterial property.The structure and property of the film were characterized.The results showed that the structure of SF in th…
与 gigapores 和 meso-macropores 包含层次 bimodal 毛孔结构的多孔的聚合物祷告(PPB ) 被导致聚合的阶段分离(果仁) 和乳剂模板技术在一只杯子里准备毛状的 microfluidic 设备(GCMD ) 。制造过程由使乳化包含了 water-in-oil 乳剂的准备水的答案进包含 porogen 的单体答案。乳剂被增加进 GCMD 制作(water-in-oil )-in-water 两倍乳剂微滴。搬运人的流动率连续阶段强烈影响了形成机制和微滴的尺寸。从滴下到微滴的 jetting 和尺寸转变的形成机制随搬运人的流动率的增加从 550 m 减少了到 250 m 连续阶段。准备微滴为聚合被开始由联…
Lots of lapping experiments were carried out for a single crystal sapphire by using a diamond fixed abrasive(FA)pad.The effects of different kinds of slurries on Material Removal Rate(MRR)and the surface quality of a workpiece were studied.The chemical influences of slurries on the surface of the crystal sapphire were…
Graphene 氧化物纸(GOP ) 能通过石墨氧化物溶液的简化过滤被准备。它拥有类似的性质到 graphene。在这研究，石墨氧化物答案借助于 Hummer 的方法从商业石墨被综合。它对应于被免职在一个纤维素过滤器上准备的弄干的 GOP。从石墨获得的弄干的 graphene 氧化物报纸的 mesophase 是 thermotropic，这被发现六角形的圆柱的液体水晶。它的更高的温度转变在 80 °C， 150 °C 和 170 °C–180°C 被发现。因此，它以后能被用于热存储和传导性的材料。
以便基于渗透的胀大原则与最佳形态学准备空乳胶粒子，有在核心的 40 wt% MAA 的 threelayer 核心 / 壳乳胶粒子首先经由 multistep 被准备播种乳剂 copolymerization，单体被一个半连续的过程在二种不同形式下面与单体增加在增加：纯单体混合(单体增加) ，和预先使乳化的单体(乳剂前增加) 。然后，有不同形态学的空乳胶粒子在碱以后被获得处理以后。在乳剂聚合和粒子形态学上喂模式的单体的影响被调查。结果证明 preemulsion 增加能显著地在每步改进聚合稳定性，并且极大地提高壳封装的一致性。粒子由乳剂前增加获得了的核心和核心 / 壳乳胶的尺寸比那些由单体增加综合的更小、更一致，并且有未经触动的形…
Using tabular alumina as aggregate,tabular alumina fines, reactive alumina ultra-fines, aluminum powders,silicon powders,carbon black,flake graphite,B4C and zircon fines as matrix,low carbon Al2O3- C refractories were prepared. Influences of zircon powders additions( 0,3%,5% and 7%,in mass,the same hereinafter) on pro…
这研究调查了退火的效果一张同样滚动的 Mg-9.26wt.%Li-3.03wt.%Al-1.10wt.%Zn (LAZ931 ) 合金表的机械性质上的温度。双阶段(+) 在厚度的 3 公里的 LAZ931 合金板被卷(67% 减小) 然后在 100 点在温度退火了 ????$
The ultrafast dynamics of excited states in 3-picoline was studied using femtosecond time-resolved photoelectron imaging, coupled with time-resolved mass spectroscopy. An ultrafast internal conversion from the S2 state to the vibrationally excited S1 state in about 910 fs was observed. This secondary-populated S1 stat…
The performance of smart structures in trajectory tracking under sub-micron level is hindered by the rate-dependent hysteresis nonlinearity.In this paper,a Hammerstein-like model based on the support vector machines(SVM)is proposed to capture the rate-dependent hysteresis nonlinearity.We show that it is possible to co…
Vibration characteristics of fluid-filled multi-walled carbon nanotubes are studied by using nonlocal elastic Flu¨gge shell model. Vibration governing equations of an N-layer carbon nanotube are formulated by considering the scale effect. In the numerical simulations, the effects of different theories, small-scale, va…
The dense FeTiNbO6 ceramics were prepared through a solid-state method. The phase structure and electrical behavior were investigated in detail. The results reveal that FeTiNbO6 are tetragonal rutile structure, and the refined lattice parameters are a=b=0.4652 nm and c=0.3013 nm. Compared with pure TiO2 rutile, the la…
To measure the thermoelectric characteristics of a high resistance nano film,a Seebeck coefficient measurement apparatus was designed and built.The temperature control accuracy and temperature difference generation mechanism were investigated and the weak voltage signals under a high resistance condition were measured…