Materials Literature
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Influence of lithium doping on the crystallization, the surface morphology, the chemical states and the luminescent properties of Y 2 O 3 : Eu 3+ phosphors was investigated. The structural, surface morphology characteristics and chemical states of the phosphors were analyzed by using X-ray diffraction (XRD), scanning…
Two new mesogenic homologous series of liquid crystalline cinnamates with substituted ethyl tails, β‐methoxyethyl [4‐(4′‐n‐alkoxycinnamoyloxy)benzoates (I) and β‐chloroethyl [4‐(4′‐n‐alkoxycinnamoyloxy)benzoates (II), have been synthesized and characterized by a combination of elemental analysis and standard spectrosc…
In this article, a new type of Cu-Ti3SiC2 composite powder prepared using the electroless plating technique was introduced. The initial Ti3SiC2 particles are 11 μm in diameter on an average. The Cu plating was carried out at middle temperature (62–65°C) with the application of ultrasonic agitation. The copper depositi…
Attenuated total reflection (ATR)-based dynamic compression modulation two-dimensional (2D) correlation study of poly(p-phenylene biphenyltetracarboximide) film is carried out in combination with spectral simulation analysis by density functional theory (DFT). The dynamic 2D infrared (IR) correlation spectra in the re…
A new, quaternary mercury and cadmium pnictidehalide semiconductor (Hg6Sb4)(CdI6) (1) has been prepared by the solid-state reaction and structurally characterized by single-crystal X-ray diffraction analysis. Compound 1 crystallizes in the space group R-3c of the rhombohedral system with four formula units in a cell:…
Abstract Summary: Reactive compatibilization of recycled low‐ or high‐density polyethylenes (LDPE and HDPE, respectively) and ground tire rubber (GTR) via chemical interactions of pre‐functionalized components in their blend interface has been carried out. Polyethylene component was functionalized with maleic anhydrid…
This study deals with safety aspects of batch reactors for styrene suspension polymerization. Polymerization is known to be the most frequent cause of thermal runaway incidents in the industrial chemical processes. Two sorts of safety problems have been studied in this work. The first one is related to an influence of…
An equation is derived for the impurity distribution in solidified distillates at a low impurity content and ideal stirring of the source material.
The reaction of [(AuCl)2dppm] (dppm=Ph2PCH2PPh2) with PhP(SiMe3)2 and P(SiMe3)3 leads to the formation of the gold cluster compound [Au18(P)2(PPh)4(PHPh)(dppm)6]Cl3 (1). The crystal structure investigation shows a central Au7P2 unit formed by two P centered gold tetrahedra sharing the central gold corner. This central…
The elemental and ionic surface compositions of (TeO2)0.8 (WO3)0.2 and (TeO2)0.7(WO3)0.2(La2O3)0.1 glasses annealed at different temperatures and bombarded with Ar+ ions for various lengths of time have been determined using x-ray photoelectron spectroscopy. The results indicate that the surface layer of the glasses c…
Improvement of the nuclear fuel exploitation has been one of the main objectives of reactor technology during the last decades. Today, in view of a sustainable nuclear energy production, development of advanced reactors re-proposes the choice of innovative fuel cycle concepts, in a context of greater expectations and…
The studies of dielectric permeability of CuInP 2 S 6 and CuInP 2 Se 6 crystals at hydrostatic pressure p atm < p <600 MPa in the temperature range 77 K< T <400 K are reported. The sign of the pressure-related shift of ferrielectric phase transition temperature is shown to be opposite in CuInP 2 S 6 and CuInP 2 Se 6 c…
In order to improve the resistance of solution-derived zinc oxide thin films against mechanical stress, nanostructured composite systems of soft organic and brittle ZnO layers were prepared by a bio-inspired process. As the organic component, polyelectrolyte multilayers were prepared by dip-coating using polystyrene s…
A procedure is developed for physical and chemical modeling and investigation of the weight, geometrical, and thermo-optical characteristics of polymer paneling materials of solar arrays and of the electric power of solar cells under the prolonged action of supersonic fluxes of atomic oxygen in orbit. The behavior of…
Micro-Raman spectra of CdS and CdSe nanocrystals embedded in different dielectric media (borosilicate glass, gelatin, polyacrylamide, polyvinyl alcohol) are studied. The observed Raman features are discussed with the account of confinement-related selection rules relaxation, scattering by surface phonons, and host mat…
Tellurium-containing cationic clathrates Si 46- x P x Te 8 ( x = 11–17) were synthesized using powder metallurgy. This study crystallized the P m 3 n (No. 223) structure and showed a p -type conductivity; their band gap energy is estimated to be 1.24 eV. Although the Si 46- x P x Te 8 samples with x = 16 and 17 were i…
Three sulfa drugs (sulfathiazole, sulfamethizole, and sulfabenzamide) were crystallized using carbon dioxide and water as antisolvents, and the effects of the type of solvent, the crystallization temperature, and the antisolvent injection rate were investigated. Sulfathiazole crystallized in granulate form from aceton…
Rheological properties of pulp suspensions play a very important role in the industry, mainly due to the consumption of energy for transporting pulp among the different parts of the paper mill. In this work, we determined the rheology of long- and short-fiber bleached kraft pulp suspensions by using a new rotational v…
Catalan and Scott 1 propose an alternative interpretation for our findings2 for CdCr2S4 in terms of Maxwell–Wagner effects. They also quote related isomorphs, such as HgCr2S4 (ref. 3), which has been discussed elsewhere4,5. As we have shown, Maxwell–Wagner relaxations can indeed strongly affect the dielectric properti…
Abstract Fully oriented, partially oriented, drawn, and quenched samples of poly (ethylene terephthalate) (PET) filaments were examined. Crystalline fraction and the average size of crystallites were measured by a wide angle X‐ray scattering diffractometer. Sample geometry in X‐ray diffraction was found to affect the…