Materials Literature
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A building block of our experimental char-forming flame retardants is pentaerythritol phosphate alcohol or PEPA. We present examples of the synthesis of several PEPA derivatives, notably bis-PEPA carbonate (BPC) and bis-PEPA PEPA-phosphonate (BP3). The syntheses are complicated by steric hindrance to reaction, and the…
Ultra-violet (uv) light of wavelength 300 nm was irradiated on Fe-18Cr alloy during passivation in a deaerated 0.1 kmol·m−3 H2SO4 solution to modify the property of passive film. XPS analysis of the passive film revealed that uv light irradiation during passivation enhanced Cr enrichment in the oxide layer of the pass…
An important and not-obvious demonstration made in this work is that replacing a closed double-shell axial cylindrical shield with a similar but open-ended shield can lead to an increasing in not only the axial shielding factor, but in the residual uniformity as well. It is shown that a self-compensation of the residu…
Carbon dioxide reforming of methane on Ni/γ-Al2O3 catalyst was studied. A new 10 wt% Ni/γ-Al2O3 catalyst prepared by the liquid phase oxidation method (L10O) exhibited much higher activity as well as resistances to both sintering and coke formation during the reaction than the catalyst prepared by the conventional imp…
Polishing of a low dielectric constant fluorinated carbon blanket layer is performed by a magnesium oxide slurry. Although deep scratches are formed at the surface when polished by fumed silica and cellium oxide slurries, such scratches are not formed when polished by slurry. A tantalum nitride barrier layer is also p…
A spin cast film of polyetherimide (Ultem® 1000, GE Plastics) was analyzed by XPS using monochromatic Al Kα excitation. The measured atomic composition closely matched the expected stoichiometry of the polymer. Peak positions of the individual chemically shifted C 1s, O 1s, and N 1s components are reported. The result…
Correlation coefficients (CCs) between the mean atomic displacement parameters (B values) of the main-chain and the side-chain atoms in selected high-resolution protein structures are distributed over a broad range (0.5-1.0). The distribution of CCs is found to be related to the mean difference in B values of Calpha a…
The potential use of 4,5-dicyanoimidazolate ion (DCI–) as a bridging ligand for magnetically interesting co-ordination polymers has been explored. New CuII–bipy complexes containing DCI– were prepared and characterised; crystal structure analysis revealed DCI– co-ordinated CuII in one of the complexes. The ESR and mag…
SUMMARY: Rigid-rod benzobisthiazole (Bipy-PBZT), benzobisoxazole (Bipy-PBO) and benzobisimidazole (Bipy-PyBI) polymers containing 2,2'-bipyridine-5,5'-diyl moieties were synthesized from 2,2'-bipyridine-5,5'-dicarbonyl dichloride and one of the following monomers: 2,5-diamino-1,4-benzenedithiol, 4,6-diamino-1,3-benzen…
Band structure of an epitaxial thin film of InSe determined by angle-resolved ultraviolet photoelectron spectroscopy, A Amokrane, F Proix, S El Monkad, A Cricenti, C Barchesi, M Eddrief, K Amimer, C A Sébenne
From antiquity, humans have created 2-dimensional art on flat surfaces (the Euclidean plane) and on surfaces of spheres. However, it wasn't until recently that they have created art in the third classical geometry, the hyperbolic plane. M. C. Escher was the first person to do so, doing all the needed constructions lab…
A statistical model of resistor networks is proposed to describe a polymer structure and to simulate the real and imaginary components of its ac resistivity. It takes into account the polydispersiveness of the material as well as intrachain and interchain charge transport processes. By the application of a transfer-ma…
An underground system of tanks was installed to delay the discharge of 131I waste from the thyroid therapy unit to the on-site sewage treatment plant. As a consequence, the level of radioactivity discharged to sewage has fallen by a factor of 530, reducing the radiation dose to hospital and auxiliary service staff. Ca…
The crystal structure and morphology of the commercial ethylene−propylene−ketone terpolymer has been investigated by X-ray diffraction, DSC, and transmission electron microscopy. Crystallization from both the bulk and from dilute solution was considered. In both cases crystallinities were found to be <50%. Two crystal…
Electrical Conductivity of Gd y Ce 1−y O 2-y/2-x (y=0.1, 0.2), as a function of temperature and oxygen partial pressure, was measured with a complex impedance method. It is shown that the increase of electrical conductivity with reducing oxygen partial pressure can be described well by a model that assumes constant mo…
A new brucite-like Mg/In layered double hydroxide of composition [Mg 0.725 In 0.275 (OH) 2 ][CO 3 ] 0.137 ·0.70H 2 O has been studied.
Metal injection molding (MIM) is a recognized processing route for net- and near-net-shape complex parts for use in medical, automotive, industrial, and consumer industries. The MIM process holds great potential for cost reduction of orthopaedic implant devices for applications such as femoral components, tibial bases…
Abstract The reaction of methanetricarboxylates 1a,b with 2‐aminopyridine, 2‐aminopyrimidine, 2‐aminothiazole as well as 2‐aminobenzothiazole yields corresponding heteroarylcarboxylic acid esters 2a,b , 5 , 8 , 11a,b . These heterocyclic esters were used as a starting material by the reaction with primary amines to ob…
Platelike BaMnAl11O19-α particles were grown in a Ce-TZP matrix by the solid-state reaction of Ce-TZP, BaCO3, MnCO3 and α-Al2O3 powders. The addition of Mn was found to be effective in lowering the formation temperature of single-phase barium hexaaluminate (BaMnAl11O19-α) by 400°C. The Ce-TZP/20 mass% BaMnAl11O19-α co…
Due to the heavy current passing through the steel cover plates of power transformers. some areas are subject to serious local overheating. It affects the safety and reliability of the expensive equipment and power delivery.