Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Two-fluid flows play an important role in many industrial applications. One attractive property is their ability to induce significant increases in mass and/or heat transfer. Bouncing and sliding bubbles are one of the two-fluid flow mechanisms which are known to give rise to very high heat transfer coefficients in he…
Consolidated Nuclear Security (CNS) Pantex took the initiative to organize a Review Panel of subject matter experts to independently assess the adequacy of the Pantex Tripping Man Analysis methodology. The purpose of this report is to capture the details of the assessment including the scope, approach, results, and de…
Recently, many studies for enhancing the thermoelectric performance by tuning the phonon dispersion and introducing the phonon scattering via nano-structuring have been reported. For example, simulations have predicted that the thermal conductivity of graphene can be tuned by strain. However, they have shown the contr…
응고 침전법으로 제조한 폴리스티렌(PS)/탄소나노튜브(CNT) 나노복합재료의 유변물성 및 전기적 물성을 고찰하였다. CNT의 분산성 향상을 위해 도입하는 일반적인 방법인 화학적 개질이나 계면활성제 도포 방법은 CNT의고유 물성을 저하시킬 수 있다. 이를 방지하기 위해 본 연구에서는 PS와 CNT를 dimethylformamide에 분산시킨 후증류수에 응고 침전시키는 방법으로 나노복합재료를 제조하였다. 응고 침전법에 의한 CNT의 분산은 매우 효과적이어서 제조한 나노복합재료는 우수한 전기 전도도를 나타내었다. 또한 PS 매트릭스에 poly(styrene-co-divi…
Dredged sea soil contains various contaminants. First priority to recycle dredged sea soil is to pretreat it to remove various contaminants because recycling dredge sea soil without any pre-treatment may cause a secondary contamination due to the leaching of hazardous chemicals. In this study, pretreated dredged sea s…
DSC 실험 데이터를 이용하여 고에너지 물질의 반응속도식을 추출해내는 이론적 방법을 제안하고 heavily aluminized explosives에 대한 반응속도식 추출을 수행하였다. DSC 실험 결과는 Friedman Isoconversional methiod로 분석되며 AKTS software를 사용하였다. 질량분율에 따른 활성화에너지와 빈도인자를 추출해 내어 반응속도식을 완성하였다. 추출된 반응속도식은 고에너지 물질의 화학반응과정을 몇 단계의 주요단계로 가정하는 형태가 아닌 전체 화학반응 과정을 나타내는 형태를 갖는다. 이는 기존의 ODTX 실험을 통해 추출되…
the present work describes the evaluation as a photolabile prodrug of a fluorescent conjugate of the tetrapeptide AAPV labeled at the C-terminus with 7-methoxycoumarin. This conjugate was submitted to photocleavage studies at different wavelengths of irradiation in different solvents and simulated physiological enviro…
Gd2O3-doped bismuth titanate (Bi4-xGdxTi3O12: BGT) and pure Bi4Ti3O12 (BIT) thin films with random orientation were fabricated on Pt/Ti/SiO2/Si substrates by rf magnetron sputtering technique. These samples had polycrystalline Bi-layered perovskite structure without preferred orientation, and consisted of well develop…
The effect of MgO-Y2O3 additives on densification, microstructure and mechanical properties of hot-pressed Al2O3-TiCN composites was studied. The MgO-Y2O3 additions had little influence on densification of Al2O3-TiCN composites. The Al2O3-TiCN composites without additives had coarsening microstructure, whereas that co…
International audience
Four Ti (C,N)-based cermets with Cr3C2 content of 0.3%, 0.6%, 0.9% and 1.2 % in mass ratio were sintered in vacuum at 1430oC, 1450oC, 1465oC and 1480oC. The mechanical properties of the specimens were determinted and microstructures were observed using the scanning electron microscope (SEM) to study the effect of Cr3C…
Recent advances in direct-use plasmonic-metal nanoparticles (NPs) as photocatalysts to drive organic synthesis reactions under visible-light irradiation have attracted great interest. Plasmonic-metal NPs are characterized by their strong interaction with visible light through excitation of the localized surface plasmo…
Considering that Ca2+has the similar ion radius and the substituted ability as Sr2+and Ba2+but the same family, CaxSr1-x-yLayO•nFe(2n-z)/nCoz/nO3ferrites have been synthesized by the conventional ceramic process. Structure and magnetic properties of CaxSr1-x-yLayO•nFe(2n-z)/nCoz/nO3compounds have systematically been i…
The ferroelectricity of Bi3.25Tm0.75Ti2.97V0.03O12 (BTTV) ceramic prepared at 1200°C by a conventional ceramic technique was investigated. The ceramic possess random-oriented polycrystalline structure. The remanent polarization (Pr) and coercive field (Ec) of the BTTV ceramics are 25 μC/cm2 and 70kV/cm, respectively.…
The electrical properties of Dy-doped bismuth titanate,Bi4-xDyxTi3O12(BDT) ceramics prepared by a conventional electroceramic technique were investigated. XRD analyses revealed Bi-layered perovskite structure in all samples. SEM micrographs showed randomly oriented and plate-like morphology. For the samples with x=0.2…
After laser ablation treatment, there are grooves on the surfaces of Ba0.5Sr0.5Co0.8Fe0.2O3δ(BSCFO) membranes. These grooves with width about 150μm and depth about 25μm increase the specific surface of these membranes. The oxygen permeation fluxes through these membranes, which sides were treatment by laser ablation,…
The ferroelectricity of Bi3.2Tb0.8Ti3O12 (BTT) and Bi3.2Tb0.8Ti2.97V0.03O12 (BTTV) ceramics prepared at 1100°C by a conventional ceramic technique was investigated. These ceramics possess random-oriented polycrystalline structure. The remanent polarization (Pr) and coercive field (Ec) of the BTT ceramics are 16 μC/cm2…
The environmental friendly catalyst, H4SiW12O40/TiO2-SiO2 was prepared by the impregnation method. The synthesis of cyclohexanone glycol ketal was as the probe reaction and investigated the different influences on the catalytic activity of H4SiW12O40/TiO2-SiO2 by the quality of the carrier TiO2-SiO2 ratio, load of het…
The ferroelectricity of Bi3.25Sc0.75Ti3O12 (BST), and Bi3.25Sc0.75Ti2.97V0.03O12 (BSTV) ceramics prepared at 1100°C by a conventional ceramic technique was investigated. These ceramics possess random-oriented polycrystalline structure. The remanent polarization (Pr) and coercive field (Ec) of the BST ceramics are 18 μ…
We present the results of a combined experimental and theoretical investigation of drop impact on a fiber. Our systematical experiments reveal that droplet motions critically depend on inertial force and surface tension, and the motions are thus prescribed by Weber number. We identify three different groups of the mot…