Materials Literature
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This thesis investigates how the properties of foams can be modulated by the addition of particles to the foam solution. As a model system hydrophobic and hydrophilic silica particles were used. The de-agglomeration of hydrophilic silica particles in water and surfactant solutions was studied. Two methods are investig…
Although absorbing materials are a useful part of modern-day defence systems, very little published knowledge exists on the fabrication of such materials especially microwave absorbing materials. The present research attempts to fabricate absorbing material compositions suitable for microwave absorption from 8 to 18 G…
An antiferromagnetic order with a Nel temperature TN = 17.5 K, a strong ferromagnetic exchange evidenced by a positive CurieWeiss temperature CW = 77.3 K, the fuzzy peaks in the real component of susceptibility (T ) and the disappearance of the second critical eld were established. The curvature of specic heat C(T ) a…
The existence of a thermotropic biaxial nematic liquid crystal phase has been a topic of great interest for almost half a century. Of the various mesogenic shapes suggested as being able to form this phase, theory has suggested that the V-shaped or molecule is one of the most promising candidates. In this thesis we us…
Miniaturisation of devices and components is becoming increasingly important in the field of molecular devices. The design of multicomponent supramolecular systems that undergo photoinduced energy or electron transfer processes has been well recognised in view of its potential for development of nanosized molecular de…
Continued progress in macromolecular science requires a fundamental understanding of miscible blends to make a connection between microscopic structure and end-use properties. As the interdisciplinary research of "soft matter" grows, the need for more rigorous experimental techniques that provides component-specific i…
Zinc oxide lms dedicated for hybrid organic/inorganic devices have been studied. The lms were grown at low temperature (100 ◦C, 130 ◦C and 200 ◦C) required for deposition on thermally unstable organic substrates. ZnO layers were obtained in atomic layer deposition processes with very short purging times in order to sh…
Control and management of cathode airflow in a solid oxide fuel cell gas turbine hybrid power system was analyzed using the Hybrid Performance (HyPer) hardware simulation at the National Energy Technology Laboratory (NETL), U.S. Department of Energy. This work delves into previously unexplored operating practices for…
We give a rigorous semianalytical definition of impedance for square and triangular ͑hexagonal͒ lattice two-dimensional photonic crystals ͑PCs͒.Our impedance is a small matrix, derived from transfer matrices, which stores the information required to calculate the reflection and the transmission between PCs.We apply ou…
The discovery of the colossal magnetoresistance (CMR) in the manganese oxides with perovskite structures T1-xDMnO3 (T = La, Pr, Nd; D=Sr, Ca, Ba, Pb) and its potential technological application motivated theoretical and experimental researchers to study the itinerant ferromagnetism. A rst theoretical description of th…
In this study, the corrosion process of enamel-coated deformed rebar completely immersed in 3.5 wt.% NaCl solution was evaluated over a period of 84 days by EIS testing. Three types of enamel coating were investigated: pure enamel, 50/50 enamel coating, and double enamel. Surface condition of the enamel coatings that…
ZnO nanofibre networks (NFNs) were grown by vapour transport method on Si-based substrates. One type of substrate was SiO2 thermally grown on Si and another consisted of a Si wafer onto which Si nanowires (NWs) had been grown having Au nanoparticles catalysts. The ZnO-NFN morphology was observed by scanning electron m…
The solubility of VOSeO3-SeO2-H2O system was studied within the temperature interval 50-300 °C. The phase diagram of vanadyl(IV) selenites was plotted and the crystallization fields were determined for the different phases. Depending on the conditions for hydrothermal synthesis, several types of selenites were obtaine…
Developments in feasible recycled poly (ethylene terephthalate) (PETr) reinforced with surface treated date palm leaf fiber (DPLF) nanocomposites with enhanced mechanical and thermal properties have been studied. Surface modified date palm leaf fiber reinforced PETr/MMT nanocomposites were prepared using twin-screw ex…
The aim of this paper is to optimize the machining of Ti-6Al-4V alloy, by studying the chip formation, roughness and tool wear for different cooling conditions. The results were compared between cooling methods, minimal quantity of fluid (MQF) and flooding, and also without fluid for the tool H13A. The turning of Ti-6…
Η παρούσα διατριβή αποτελείται από δύο εργασίες στην περιοχή των μερικών διαφορικών εξισώσεων, οι οποίες ασχολούνται με δύο φυσικά φαινόμενα αλλαγής φάσεων. Η πρώτη ασχολείται με το φαινόμενο της ωρίμασης Ostwald και αναπαράγει μία εκδοχή της θεωρίας των Lifshitz, Slyozov και Wagner μέσω ομογενοποίησης ενός προβλήματο…
Copyright: 2012 The author. Proceedings of the Microscopy Society of Southern Africa, vol. 42, p. 69
核融合エネルギーの早期実現を目指す幅広いアプローチ活動のもと、国際核融合材料照射施設(IFMIF)の工学実証・工学設計活動(EVEDA)を2007年より実施している。この活動の中で実機のリチウムターゲットを実証する目的で世界最大流量率(3000リットル/分)を有し、幅100mmで厚さ25mmの形状で最速20メートル/秒までの範囲で安定したリチウム流を実証試験を行うために液体リチウム流動試験装置を原子力機構大洗研究開発センターに建設し、その実証試験を開始したところである。本試験装置の各種機器の機能性試験及びそれに続く、ターゲット部でリチウム自由表面を持つ15m/sの流動試験までに関する第一段階確証試験を成功させた所である。また、これ…
[Abstract] Mechanochemical routes for synthesis of spinel(MgAl2O4) from low-crystalline magnesia, which was made by pyrolysis of basic magnesium carbonate, and transition aluminas,γ- and χ-alumina, were investigated. The mixture of low-crystalline magnesia and γ -alumina after milling 24 hours were calcined at tempera…
原遺跡，神郷大塚遺跡，大内氏館跡， 岡の台遺跡)の９遺跡である．このうち，岩淵遺跡，原遺跡， 岡の台遺跡の３遺跡は瓦質土器焼成窯遺構が検出されており， 生産地の土器試料である． ２．分析方法と試料 分析方法は，蛍光Ｘ線分析法と実体顕微鏡による土器表面 の胎土観察の２つの方法で検討した． 蛍光Ｘ線分析法では，胎土の成分(元素)量を測定し，そ の成分量から分析試料の違いについて調べた．測定した成分 (酸化物)は，SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , MnO, MgO, CaO, Na 2 O, K 2 O, P 2 O 5 の10成分である．測定装置はエネルギー分散 型蛍光Ｘ線分析計(ｾｲｺｰｲﾝ…