Materials Literature
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A series of Zn1–xNixFe2O4 nano ferrite (with x=0, 0.2, 0.4, 0.6, 0.8, and 1) compositions were synthesized using the combustion technique. The powder samples were characterized by XRD. The X-ray analysis showed that the samples were single phase spinel cubic structure. The AC resistivity decreases by increasing the fr…
Silicon carbide ceramic matrix composites (SiC/SiC-CMCs) are promising materials for application in the hot section of gas turbines. SiC forms a protective SiO2 scale (TGO) which sufficiently protects the underlying material from oxidation at high temperatures in dry air. However, if rapidly flowing water vapour in a…
In the last twenty years, the continuous seek for alternative energy sources to power micro- and nano-electronic devices has marked the rise of interest toward thermoelectricity. Thermoelectric materials can turn directly, by Seebeck effect, the temperature difference into useful electric power. The energy lost as was…
In the last two decades, inorganic nanoparticles have become an active field of research due to their unique physical properties. The advancements in the control over size, shape and composition opened up many potential applications in a wide range of fields from optoelectronics to medicine. A lot of research focusses…
To improve the dehydrogenation thermodynamics of magnesium based hydride, i.e. MgH2, it is essential to weaken its structural stability. From density functional theory calculations, we show that the crystal structure and dehydrogenation thermodynamics of MgH2 are sensitive to the applied lattice strain. The metastable…
Graphene is a very promising optoelectronic material and has gained more and more attention. Due to the significance of computer-aided design of graphene, several simulation modeling methods have been developed. In this paper, a brief review of some widely used computational electromagnetic algorithms and correspondin…
Introdução: As feridas crónicas têm um impacto bastante significativo em várias componentes, tais como a física, psicológica e financeira. Estudos efetuados no âmbito da estimulação elétrica (EE) na cicatrização de feridas crónicas mostraram que as correntes bidirecionais, como o TENS (transcutaneous electrical nerve…
Green materials and structures have gained the worldwide attention over the past few years. Interest in the utilization of lignocellulosic biomass in the form of natural fibres (biofibres usually derived from plant) as organic filler into lightweight fibre reinforced composites for sustainable building constructions i…
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Organometal halide perovskites have recently emerged as promising materials for fundamentally low- cost, high-performance optoelectronics. In this thesis, we utilize thermal co-evaporation of PbI2 and CH3NH3 I to fabricate thin films of CH3NH3PbI3 . We first investigate the effect of stoichiometry on some of its struc…
Master Oficial en Fisica Avancada, , Facultat de Fisica, Universitat de Barcelona, Curs: 2016, Tutors: Ignacio Pagonabarraga Mora, Samuel Sanchez Ordonez
본 연구에서는 급속히 성장하고 있는 산업분야인 생분해성 플라스틱인 PLA(Poly Lactic Acid)를 사용하여 개발된 식생매트의 생분해기간에 따른 인장성능을 비교하였다. 시험방법은 한국산업표준(KS)에서 정한 방법을 준용하였다. 단일소재로 제작된 PLA 매쉬 및 PLA 플라스틱으로 실험한 두꼐, 인장강도 및 분자량은 5개월 생분해 기간에 반비례하는 결과를 나타내었다. PLA 매쉬의 두께는 11.2%~13.4% 수준까지 두께가 증가하였으며 PLA 매쉬의 인장강도는 32.4%~55.4% 수준까지 감소하였다. PLA 플라스틱의 인장강도 및 분자량도 시간경과에 따라…
Des couches ternaires de Mo-Cr-N ont été élaborées par PVD magnétron. L’analyse EDS des films Mo-Cr révèle l’existence du chrome et du molybdène. Ceci est en accord avec la composition de la cible (Cr 20% at. Mo 80 % at). L’épaisseur des films Mo-Cr-N augmente avec le temps de dépôt. Leur cristallinité se trouve améli…
This study presents a novel electrochromic (EC) device using WO_3/AZO/Au/AZO films. The films were prepared by simultaneous RF magnetron sputtering (for WO_3 and AZO) and ion sputtering (for Au). We investigated the effect of annealing conditions on the conductivity of the transparent electrode (AZO/Au/AZO films). The…
Due to the shielding effects of metal to the electromagnetic wave, when the thickness of the metal film is greater than the wavelength of the incident wave, the electromagnetic wave can't get through the metal film. This paper designed a new type of double-layer metal subwavelength circle array structure, by etching s…
Fabrication of optimal ultra-lightweight hybrid cellular materials via a two-step synthesis method of rapid prototyping followed by electrodeposition was accomplished in three distinct stages: modelling, fabrication, and validation. For the first stage, a baseline microtruss architecture with multiple geometric and ma…
도로포장의 조기파손에 의한 폐아스팔트 콘크리트(=RAP(Reclaimed Asphalt Pavement), 이하 ʻ폐아 스콘ʼ)의 증가와 노후 아스콘 포장의 유지보수 시 노면의 절삭으로 매년 상당한 양의 폐아스콘이 발생되고 있으며, 발생량에 따른 도로의 보수비 역시 매년 증가하는 양상을 보여 폐아스콘의 적극적인 사용이 필요 한 상황이다. 기존 도로의 유지보수 비용이 이전보다 매우 큰 비중을 차지하고 있으며 유지보수 기술이 발달함에 따라 폐아스콘을 재활용하는 기술의 요구 및 실용화 연구가 크게 진행되었다. 폐아스콘을 재활 용하기 위해 사용되는 재생 첨가제에 경우는 해…
Interest in platinum-chain complexes arose from their unusual oxidation states and physical properties. Despite their compositional diversity, isolation of crystalline chains has remained challenging. Here we report a simple crystallization technique that yields a series of dimer-based 1D platinum chains. The colour o…
There are lots of hazard chemicals able to effect marine environment, such as antifoulant, antibiotic medicine, and farming chemicals. Tributyltin is a toxic chemical used for various industrial purposes. Due to its widespread use as an antifouling agent in boat paints, TBT is a common contaminant of marine and freshw…
중국 연길은 경제가 발전하면서 물류의 원동력인 중차량이 많이 증가하고 있는 실정이므로, 2000년 이 후 부터는 일반 아스팔트 보다는 고내구성의 재료인 개질 아스팔트(Polymer Modified Asphalt, PMA), 보강아스팔트, 구스 아스팔트, 및 반강성 포장 등을 많이 적용하고 있으나, 값비싼 초기 비용 대비 장기 공용 성능 확보에 많은 어려움을 느끼고 있다. 이러한 문제를 해결하기 위하여 중국의 환경 및 교통 하중 조건에 대한 자료 및 아스팔트 포장 재료 품질규격, 시공기준을 고려한 현지화 기술 개발을 통한 도로 포 장의 파손 문제해결과 유지보수 비용…