Materials Literature
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Um estudo refinado dos filmes derivados do gel de pentxido de vandio foi realizado por meio de tcnicas espectroscpicas e microscpicas visando compreender melhor as caractersticas deste material na escala microscpica
La sintesi diretta di perossido di idrogeno prevede la solubilizzazione dei reagenti (H2 e O2) in un solvente liquido, dove reagiscono sulla superficie di un catalizzatori solido. In questa Tesi viene studiata la sintesi diretta implementando sistemi semi batch a pressione atmosferica e batch in pressione al fine di d…
Nel presente rapporto viene descritta la procedura operativa per l’analisi di campioni di grafite provenienti da un reattore di ricerca in fase di smantellamento. Più precisamentesi tratta del reattore RB3 sito presso la sede ENEA di Montecuccolino. e tale procedura rientra nelle modalità di lavoro per la disattivazio…
Gli acciai inossidabili Duplex sono una categoria di acciai aventi una microstruttura bifasica, composta da austenite e ferrite. Questi acciai sono classificati in base alla loro resistenza alla corrosione per vaiolatura (pitting), valutata mediante l'indice PREN (Pitting Resistence Equivalent Number. I materiali sono…
该文是一篇近两个月的锂电池文献评述，我们以“lithium”和“batter^＊”为关键词检索了Webo f Science从2012年12月1日至2013年1月31日上线的锂电池研究论文，共有628篇，选择其中100篇加以评论。层状氧化物正极材料继续受到关注的同时，高容量的si基负极材料一直是研究的热点，然而其体积膨胀、长循环效率低的缺点尚未被克服。固态电解质是解决锂离子电池安全问题的方案之一，但从目前的研究水平来看距离实际应用还有很长的路要走。新的聚合物电解质和具有高能量密度的Li-O2和Li-S电池也是研究热点，除了这些以材料为主的研究之外，针对电池特性和电池应用的研究论文也逐渐增多，对电池技术的创新也将产生促进作用。
The tanning industry produces high social, economic an especially environmental impact, due to the waste it generates. Within the solid waste, highlights the “Wet Blue Chips” (25% of the solids removed), composed by collagen – Cr complex. Therefore, they are arranged in special reservoirs, at an additional cost. Their…
Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2013.
This specification covers a corrosion-resistant steel in the form of welded and drawn or seamless and drawn tubing.
High temperature polymeric materials for electrical insulation and energy storage are needed for transformational power applications such as pulsed-power and hyrid electrical vehicles. One of the candidate materials has been polyetherimide, an amourphous thermoplastic with a glass transition over 200C. Here dielectric…
A twisted graphene bilayer exhibits a triangular Moire pattern in the local stacking, that smoothly alternates between the three basic types AA', AB' and BA'. Under an interlayer bias U, the latter two types develop a spectral gap, characterised by opposite valley Chern numbers. We show that for large enough Moire per…
The relativistic nature of charge carriers in graphene is expected to lead to an angle- dependent transmission through a potential barrier, where Klein tunneling involves annihilation of an electron and a hole at the edges of the barrier. The signatures of Klein tunneling have been observed in gated graphene devices,…
We calculated the magnetic anisotropy constant Ku of MnBi using a first principles approach, and obtained a negative Ku in agreeable with experimental results. Furthermore, we also found a band filling dependence indicating that a slight decrease in the valence electron number will change Ku from negative to positive.…
Slot coating process is commonly used in the manufacture of high technology products such as flexible circuits, LCD and OLED displays, among others. The thickness of the coated liquid film depends on the flow rate and substrate velocity. It is very important to study the flow in the coating bead region, because the fl…
To keep up with the growing demand for oil and gas, the oil and gas industry ventures into deeper waters. For a deep water pipeline project, South Stream, a pipeline test program is developed. Part of this program is the investigation of the resistance of an externally pressurised pipeline against local buckling colla…
Numerical simulations on non-woven-fibrous, porous structures were performed to determine material design space for energy storage device (battery and ultracapacitor) separators.
Las aleaciones Zinc-Aluminio (ZA) fueron desarrolladas en la decada de los sesenta por las companias productoras de zinc como alternativas a las fundiciones, hierros maleables y bronces, en un tiempo donde el suministro de cobre escaseaba. La adicion del aluminio al zinc, le proporciona a la aleacion, entre otras prop…
The relativistic nature of the charge carriers in graphene is manifested in the angle-dependent transmission across p-n junctions, where Klein tunneling involves annihilation of an electron and a hole at the p-n junction interface. The transmission probability is equal to unity and independent of the barrier height fo…
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Official journal of the Institute of Physics - Sri Lanka. Full text articles are available. The journal also has a website at http://www.ip-sl.org/sljp/The new email for the Editor is eic.ipsl@gmail.com.
Defect chemistry plays an important role in many aspects of electrode and electrolyte materials for Li-ion battery,particularly physical and chemical properties,rational design and optimization.In this article,the influence of defects on electrode materials properties and performance is mainly discussed.This includes…