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。
Abstract Co‐B amorphous alloy catalysts supported on three kinds of mesoporous silica (common SiO 2 , MCM‐41 and SBA‐15) have been systematically studied focusing on the effect of pore structure on the catalytic properties in liquid‐phase hydrogenation of cinnamaldehyde to cinnamyl alcohol (CMO). Structural characteri…
Abstract In this study, the polyetherblock amide (PEBAX)® nanocomposites with 2.5 % and 5 wt.% organoclay, based on Cloisite 30B (montmorillonite intercalated with dimethyl, 2-ethyl hexyl hydrogenated tallow alkyl ammonium cation), were prepared by the melt-intercalation process. The structural properties, thermal beh…
Manufacturing and high heat-flux testing of brazed actively cooled mock-ups with Ti-doped graphite and CFC as plasma-facing materials, García-Rosales, C, Pintsuk, G, Gualco, C, Ordás, N, López-Galilea, I, Ramos Fernández, J M, Martínez Escandell, M, Centeno, A, Blanco, C, Linke, J, Grattarola, M, Mataloni, F
Abstract The compatibilization effects provided by different amines in the synthesis of polypropylene/amine modified montmorillonite clay nanocomposites (PP/ A-MMT) were studied. Nanocomposites were prepared by melt processing using a twin-screw extruder, by compounding maleic anhydride grafted polypropylene (PPgMA) w…
The micro- and mesoporous structures of microemulsion templated mesocellular foam (MCF) silica materials aged at different temperatures were investigated by using nitrogen sorption α s -comparison plots and positron annihilation lifetime spectroscopy (PALS). The impact of surface amino functionalization with (3-aminop…
Bi1 − x Sr x FeO3 − x/2 (I), Bi1 − x Sr x Fe1 − x MnxO3 (II), and Bi1 − x Ca x Fe1 − x Mn x O3 (III) solid solutions have been obtained. Their magnetization has been measured by X-ray and neutron diffraction and Mössbauer spectroscopy. According to the Mössbauer spectroscopy data, iron ions are in the trivalent state…
The dielectric and acoustic properties of (1 − x )SrTiO 3 - x BiFeO 3 (0 ≤ x ≤ 0.04) solid solutions have been studied in the temperature range 10–300 K. The polar state exhibiting permittivity dispersion and dielectric hysteresis loops has been revealed at temperatures of 40–100 K. At 20–40 K, we have observed one mo…
We investigated propagation of electromagnetic waves through composite structures with negative refractive index, the popular ”left-handed metamaterials”, for the case when there is a gradient of refractive index. We obtained the exact analytical solutions to the Helmholtz equation valid for arbitrary steepness of the…
Epitaxial graphene channel top-gate FETs on Si substrates are fabricated and their transistor operation is observed. Although the device characteristics is still primitive, this approach is a promising way to put graphene to the mainstream of the semiconductor manufacturing of the beyond-CMOS era.
In this work the process for the realization of Oxidised Macro Porous Silicon (OMPS) layer as a material for thermal isolation has been studied. Macro Porous silicon layers are created by anodisation of P-type (10-20 ¿-cm) silicon with HF and DMF (Dimethylformamide), which are then followed by thermal oxidation in ord…
Abstract A silane‐containing diamine, bis( p ‐aminophenoxy) diphenylsilane (BADPS), was prepared by the condensation of p ‐aminophenol with dichlorodiphenyl silane in the presence of triethylamine. Then, BADPS was condensed with 4,4‐azobis(4‐cyanopentanoyl chloride) to prepare macroazoinitiators containing silane unit…
The effect of the oxygen concentration in a melt on the characteristics of sodium-reduced tantalum powders, which were produced from potassium heptafluotantalate-based melts with tantalum pentaoxide additions, is studied. An increase in the oxygen content in the initial melt from 0.35 to 2.0 wt % leads to an increase…
Carbon removal in the so-called remote areas, where no energetic species can reach the surface, is investigated with low-temperature glow discharges in pure oxygen. Plasma-deposited amorphous hydrogenated carbon thin films are used as a model system for redeposited films. Erosion measurements are performed on flat sub…
This paper describes a new member of the eudialyte group named in honor of Alexander Alexandrovich Voronkov (1928–1982), the prominent Russian crystallographer. The new mineral has been found in the Shkatulka hyperalkaline pegmatite body at Mt. Alluaiv, Lovozero alkaline pluton, Kola Peninsula, Russia. The mineral is…
Abstract An optimized and high-performance Monte Carlo simulation is developed to take thorough account of the influence of chain-length-dependent termination rate constant on polymer microstructure in ATRP. According to the simulation results, bimolecular termination rate constant sharply drops throughout the polymer…
Abstract Ge, GeTe, and GeSbTe (GST) films are grown on both planar TiAlN/Si substrates and a trench structure (diameter 120 nm; depth 200 nm) using layer‐by‐layer, metal‐organic (MO) CVD. The GeTe and GeSbTe films completely fill the trench structure, and show well‐crystallized phases with a rhombohedral and hexagonal…
This paper investigates the parameters of aerosol particles that occur in the course of spontaneous vapor thermal condensation and bubbling of the saline blend in 66 LiF-34 BeF2 eutectic compound (mol %) with helium in the vertical-bubbles flow mode in an ampoule device to create medical reactor radioisotopes produced…
Abstract This work deals with the study of the processability of blends based on PA6 and NBR. The aim is to achieve reduced PA 6 melting temperatures in order to avoid degradation of the NBR phase during processing. The effect of different additives in PA has been studied. For this purpose PA6 was blended with nonylph…
We present our investigation on the critical behavior of the spinel compound CdCr2S4 via the ac susceptibility and dc magnetization measurements. The analysis of ac susceptibility in terms of scaling behavior yields exponent values of δ=5.38±0.01, γ+β=1.77±0.03 and γ=1.44±0.02. Both δ and γ are slightly larger than th…
The carrier type reversal (CTR) from p- to n-type in semiconducting chalcogenide glasses is an important and a long standing problem in glass science. Ge–Se glasses exhibit CTR when the metallic elements Bi and Pb are added. For example, bulk Ge42−xSe58Pbx glasses exhibit CTR around 8–9at.% of Pb. These glasses have b…