Materials Literature
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ABSTRACT ：Commercial grades of solution styrene-butadiene rubbers extended with high aromatic oils having high poly-cyclic aromatic compounds (PCA) and low PCA oils were used to study the effect of the processing oil particularly onthe crack propagation resistance and frictional wear resistance of the vulcanizates. Th…
The contribution discuses present state of art at description of the phase structure evolution in molten immiscible binary polymer blends in flow and in quiescent state on microrheological level. Discussion is focused on quality of predictions of the phase structure of immiscible polymer blends after mixing and proces…
Tunable selectivity provides a relatively simple and inexpensive way to manipulate peak positions and gain resolution in chromatographic separations. Length tuning utilizes two columns of different polarities connected in series. Selectivity is manipulated by changing the relative lengths of the two columns. However,…
In this study, intrinsic size effect — strong size dependence of mechanical properties — in materials deformation was investigated by performing atomistic simulation of compression on Au (114) pyramids. Sample boundary effect — inaccurate measurement of mechanical properties when sample size is comparable to the inden…
合成了一种新型三元铁基合金催化剂Fe（Pd）P，通过X射线粉末衍射（XRD）、等离子体发射（ICP）和扫描电子显微镜（SEM）等手段对催化剂进行了表征．将其应用于催化PH，分解的实验，初步探讨了催化反应条件．结果表明：三元铁基合金催化剂Fe（Pd）P具有很好的热稳定性及很高的催化活性，使用此催化剂在420℃，磷化氢的实际分解率可高达90％以上．
In order to improve the surface quality of strip head, and help to reduce the number of spare parts roller volume, as well as hot rolling mill to increase production efficiency. Study the rules of stress and pressure distribution in the expansion course of hot-rolled strip steel among layers in the full-hydraulic unde…
Coherent G-mode vibrations in SWNTs were studied with spectrum-resolved pump-probe experiments. Detection wavelength dependence of G-mode amplitude was explained by SARS and SSRS. We could drive one process by controlling the dispersion of ultrashort pulses.
Using cis-trans isomerization of azo polymers we can fabricate waveguides, gratings and other periodic structures. Here we have fabricated a two dimensional photonic crystal which acts as an active Add/Drop WDM switch.
Experimental investigation of A-type and B-type guided modes was performed in GaN-based film-transferred photonic crystal light-emitting diodes. Good agreement with the band structure calculated in the limit of two-dimensional free photon was obtained.
Among lightweight metal alloys, magnesium is the lightest structural material with density of 1.74 g/cm 3 , having many attractive physical and mechanical properties combined with processing advantages. Therefore, it represents very attractive material for large amount of applications starting from automotive industry…
近年來，環保意識抬頭，全世界都投入於綠色能源的研究。由於對環境友善以及低汙染，使得太陽能、氫能與燃料電池為目前的三大研究主流。在燃料電池的研究中，鋅空氣燃料電池由於具有重量輕以及結構簡單等優點，為目前科學研究的重點之一。鋅空氣燃料電池之效能取決於其電極、電解液以及觸媒特性，因此觸媒反應效率的改善為鋅空氣燃料電池研究的重點。磷鉬酸觸媒(H3PMo12O40．xH2O；簡稱PMo12)為目前被廣泛研究的新型觸媒。目前已有相關研究發表將磷鉬酸觸媒(PMo12)應用於質子交換膜燃料電池(PEMFC)以及直接甲醇燃料電池(DMFC)之電極觸媒以提升電池效能。本論文將強氧化劑磷鉬酸觸媒(H3PMo12O40．xH2O；簡稱PMo12)應用於鋅…
It is shown that the Ornstein-Zernike equation has two solutions, classic (analytic) and critical (not analytic). Closure equations of the HNC, PY, etc. types well known in the theory of liquids correspond to the first solution. The second solution presupposes that the bridge functional of a system has the form of the…
研究了智能动力混凝土各组成材料及外加剂对混凝土新拌性能的影响。结果表明,BASF新型黏度改性剂RheoMATRIX降低了混凝土对用水量与原材料质量波动的敏感性,但其掺量不宜过大,否则会引起混凝土流动性下降,但对混凝土强度无负面影响。此外,骨料的颗粒级配对于混凝土流动性能影响明显,在实际应用中需通过试验确定最佳骨料级配。大量的现场试验证明,Glenium 6xxx SDC能在中国多种原材料条件下,配制出性能优异的智能动力混凝土。
Generalized Ohm’s Law is used to model the phenomenon of broadband asymmetric reflectance recently observed in semicontinuous metal-dielectric films in the proximity of the percolation threshold. Qualitative agreement with experiment is achieved.
Regarding the ever increasing demand for net shaping, research on innovative technologies on tool material and design becomes an important factor for the overall efficiency and competitiveness. The tools in cold forging have to withstand damaging mechanisms of both fatigue and wear, which may act concurrently at diffe…
Fibrous composites materials are commonly used for thermal insulating purpose and cover a wide range of applications, from high temperature to building insulators. Their effective thermal properties strongly depends on the fibers arrangement, i.e. fibers orientations and number of fibers contacts., which are a consequ…
Crystalline germanium sulphoselenide having a wide band gap has attracted many researchers due to its important properties in solar energy converters. In this paper authors present their investigation on growth of off-stochiometric single crystals of germanium sulphoselenide GeS0.5Se 0.5 by direct vapour transport tec…
Sewage sludge has predominantly organic composition and can improve soil characteristics, such as fertility and erosion resistance. Therefore, its application as an amendment for agriculture is an adequate alternative for its final disposal. However, there is a lack of information concerning soil enrichment with radio…
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Various devices have been proposed which use magnetic domain walls (DWs) in nanosized magnetic structures to perform logic operations or store information. In particular in ‘Racetrack memory’ bits of information represented by DWs are shifted in a magnetic wire to be stored. For these memory and logic devices to be su…