Materials Literature
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Thermo-electricity offers an elegant solution to the problem of heat-to-electricity conversion. As a completely solid-state heat engine, thermoelectric materials confer many advantages in electricity generation and heat pumping. However, the efficiency of thermoelectric material, represented by the figure of merit, Z,…
The deconstruction and upgrading of lignocellulosic biomass dissolved in ionic liquids was studied as a potential alternative route to products traditionally synthesized from petroleum. While domestic biomass is a cheaper, lower carbon emission, alternative feedstock to petroleum, its utilization requires the selectiv…
The subject of this thesis is the metallurgical stability of an alloy selected for use in a ceramic oxide fuel cell. Fuel cells are a new and developing power generation technology with numerous designs and materials being considered for the construction of fuel cells. One particular design, a multilayer, laminated fu…
Abstract In this paper, the electrocatalytic behavior of urea oxidation on a nickel electrode in alkaline medium was investigated using various electrochemical techniques: cyclic voltammetry (CV), linear sweep voltammetry (LSV), and rotating disc electrode voltammetry (RDE). Possible mechanisms have been proposed on t…
A collection of images examining the microstructure of raw cocoons. The research investigates how the microstructure varies from one layer to another in the same cocoon and also from one cocoon variety to another. The research is being undertaken to study the structure and property relationships, specifically the anti…
采用DSC方法研究了PA1212-b-PEG在不同降温速率下的结晶过程,并利用Avrami方程研究了其非等温结晶动力学。在非等温结晶过程中,随着降温速率的增大,结晶温度向低温偏移。综合利用Avrami方程得到Avrami指数为4,说明结晶是以异相成核,三维生长。
Produksjon av elektrisk kraft fra offshore vindparker vil trolig bli en stor utfordring i fremtiden. Norges forskningsrad har i den forbindelse tilfelt SINTEF Energi femarsprosjektet; &# ...
教师的不均衡分布，是各类学校之间存在悬殊差距的重要原因，因此教育均衡需要教师的合理流动。然而，在现实中由于种种原因，教师流动存在着一些困难，要么有教师不愿流动，要么有教师被动流动。那么怎样让教师真心流动、争先流动呢？至少需要以下三种角色的转换。一是接受方在待遇上要厚待流动教师。流动教师不是“流放”，而是客人。
Optical properties of hybrid structures based on zinc oxide nanocrystals (NCs) and Gallium Nitride quantum well (QW) has been studied. The ZnO NCs thin films on the top of GaN QW structures were fabricated using spin coating. The surface morphology was characterized by scanning electron microscopy (SEM). We have perfo…
There is a strong interest in thermoelectric materials for energy production and savings. The properties which are integral to thermoelectric performance are typically linked, typically changing one of these properties for the better will change another for the worse. The intertwined nature of these properties has lim…
New materials are the foundation of 21st century technology. Nanosystems and materials industry one of the priority directions of science and technology, today affecting almost all areas of research and activities. An important and rapidly developing area of materials science is applied to the surface engineering of t…
Fra le specie annuali a uso energetico adatte \nai nostri areali, alcune sono ampiamente note \n(mais, colza, girasole, ecc.) e non comportano \nquindi particolari problematiche, altre sono \ninvece di nuova introduzione (sorgo, kenaf, \ne canapa) e quindi a più incerta collocazione \nnegli avvicendamenti colturali
以二正丁基胺、二硫化碳等合成了中间体二正丁基二硫代氨基甲酸钠,并用其通过亲核取代反应对氯化石蜡-52（T302）进行了化学改性。用红外、元素分析和热重等手段进行了表征和分析。采用多功能摩擦试验机、四球摩擦磨损试验机、旋转氧弹、PDSC等试验手段,考察了该添加剂在HVI150基础油中的摩擦学性能和抗氧化效应。结果表明,改性后的添加剂T302G具有良好润滑性能和辅助抗氧作用。
Выполнен анализ применяемых при производстве сварных строительных металлоконструкций сталей в современной отечественной и зарубежной практике. Выявлены общие тенденции и различия в системах легирования сталей, используемых для производства толстолистового проката из наиболее массово применяемых классов прочности. В ла…
Objective: The aim of this study was to investigate the effect of layering methods using a methacrylate-based composite, a flowable composite liner and a low shrinkage silorane-based composite on the polymerization shrinkage stress of light cured composites.\n\nMethods: Twenty four aluminum blocks were used to prepare…
The atomic structure, composition and epitaxial quality in the vicinity of the interface between GaN and InGaN in the multi-quantum wells (MQWs) determine the optical, electrical, and mechanical properties of the optoelectronic devices. GaN-based light-emitting diodes (LEDs) contain a quantum confinement structure wit…
The effect of microfibrillated cellulose on the pressability of TMP and filler mixtures and on paper properties
The main limitation of Al-Si-Mg castings is the considerable influence of the solidification and heat treatment conditions on the final microstructure and, consequently, mechanical properties. This generally leads to a wide scatter in their values in different parts of complex-shaped cast components, with detrimental…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 - August 2, 2012
The subject of the grain boundary segregation of solute has attracted considerable attention in recent years, since it is widely recognized that such solute segregations not only control many of the mechanical, chemical and electronic properties of technologically important materials but also induce grain boundary str…