Materials Literature
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Nous avons resolu la structure cristalline de la jagueite, de composition ideale Cu 2 Pd 3 Se 4 , monoclinique, a 5.672(5), b 9.909(9), c 6.264(6) A, β 115.40(2)°, groupe spatial P2 1 /c, par methodes directes, et nous l'avons affinee jusqu'a un residu R 1 de 5.52% en utilisant 956 reflexions uniques mesurees avec ray…
We have investigated the crystal growth mechanism of spherical Si fabricated by a dropping method. The Si spheres were classified into two categories by surface morphology. The grain size of a Si sphere with a smooth surface is larger than that with a rough surface. To investigate the crystal growth mechanism of the s…
The frequency-dependent electrical data of the bismuth germanate silicate (BGSO) glasses have been discussed in the framework of the electric modulus representation and the power-law conductivity. The activation energies of the mean electric relaxation time and the direct current (dc) conductivity obtained by the comp…
The many-body theory of photoemission in solids is reviewed with emphasis on methods based on response theory. The classification of diagrams into loss and no-loss diagrams is discussed and related to Keldysh path-ordering book-keeping. Some new results on energy losses in valence-electron photoemission from free-elec…
The changes in visibility range in smoke generated during thermal decomposition and combustion of polyester materials (PES) in the model scheme: room-corridor (Fig. 1), during 1st stage of a fire development, were analyzed. The effects of external heat flux density and flame-retardants on the course of changes of visi…
|Cu x|[Si yAl]-MFI and |Co x|[Si yAl]-MFI catalysts were prepared by ion exchange from |Na|[Si yAl]-MFI zeolites (y = 12, 25 and 45). The activity of the catalysts was evaluated in the reduction of NO to N2 in an oxidative atmosphere using propane or methane as reducing agents. The Cu catalysts were only active with p…
Using the potential morphing method within the finite depth square-well effective mass approximation, we calculate the exciton energy of narrow band gap colloidal PbS, PbSe, and InAs quantum dots, assuming a size dependent dielectric function. Concerning the behaviour of the effective band gap with the quantum dot rad…
Article Plasticity Characteristic Obtained by Indentation Technique for Crystalline and Noncrystalline Materials in the Wide Temperature Range was published on April 1, 2006 in the journal High Temperature Materials and Processes (volume 25, issue 1-2).
The behavior of residual magnetization M r , initial magnetic permeability μ, and coercive force H c of steels subjected to plastic extension both in the loaded state and in the unloaded state during “slow” and “fast” loading is explained from a unified point of view. It is shown that, upon unloading, the appearance o…
Abstract The aim of this work was to investigate whether neoformed Ni-phyllosilicates can be observed and identified using transmission electron microscopy (TEM) in combination with energy dispersive spectroscopy (EDS). The investigations focused on Ni-phyllosilicates formed from Ni-doped montmorillonite. The reaction…
A novel chlorinated diamine monomer with keto group, 4,4′-dichloro-3,3′-diamino benzophenone (DADCB) was prepared through the nitration of dichloro benzophenone (DNDCB) followed by catalytic reduction with SnCl4 and HCl. Chlorinated polyimides (IVa-e) were synthesized from the above diamine with various commercially a…
We report the synthesis of a red light‐emitting and photopolymerizable smectic liquid crystal (reactive mesogen). We investigate the suitability of polymer networks formed from smectic reactive mesogens for use in organic light‐emitting diodes (OLEDs). The use of mixtures of smectic reactive mesogens is shown to lower…
In this study, a range of carefully selected wool and cashmere yarns as well as their blends were used to examine the effects of fiber curvature and blend ratio on yarn hairiness. The results indicate that yarns spun from wool fibers with a higher curvature have lower yarn hairiness than yarns spun from similar wool o…
Plane wave shock loading produces twins or twin faults in many metals and alloys, and, especially for fcc materials with decreasing stacking fault energy (SFE), a critical twinning pressure (CTP), and crystallographic orientations which control the onset and extent of twinning. The CTP increases with increasing SFE, a…
A side-chain methacrylamide copolymer, poly{( N -[3-(4-(4‘-methoxyphenylazo)-2-nitrophenoxy)propyl]- N -[3-(dimethylamino)propyl]methacrylamide)- co -( N -[3-(dimethylamino)propyl]methacrylamide)} (PNA) functionalized with a 2,4,4‘-substituted chromophore, 2-nitro-4‘-methoxyazobenzene was prepared and characterized. T…
Kinetic modeling to reproduce the experimental chemiluminescence of OH*, CHO*, CH* and C2* excited radicals formed in C2H2/O2 combustion in a closed chamber was evaluated. A reaction mechanism with 37 species and 106 elementary reactions for C2H2/O2 combustion at phi=1.00 and phi=1.62 was validated through chemilumine…
It is necessary to measure the performance of outdoor/protective clothing materials in terms of comfort properties under dynamic enduse conditions. A vertical type human-clothing-environment simulator was used to evaluate the thermal comfort performance of layered textile materials under dynamic conditions. Fabric lay…
To define the origin of the electronic excited states of single-walled carbon nanotubes, femtosecond fluorescence up-conversion and frequency-resolved transient absorption measurements were used for selective excitation/probing of particular nanotubes in a micelle-dispersed preparation enriched with individual nanotub…
This paper presents a new approach in tomographic instrumentation for agriculture based on Compton scattering, which allows for the simultaneous measurements of density and moisture of soil samples. Compton tomography is a technique that can be used to obtain a spatial map of electronic density of samples. Quantitativ…
The corrosion resistance of 17-4PH powder injection-molded (PIM) martensitic stainless steel (SS) was evaluated in naturally aerated sodium chloride (NaCl) solution (3 wt%) at 25°C. This resistance was investigated by analyzing the curves of the evolution of open-circuit potential with time (Eocp vs. time), electroche…