Materials Literature
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This paper deals with maximizing dimethyl ether (DME) production from methanol due to its industrial importance as a future diesel fuel. The high acidity and the micro-porous structure of the catalysts encouraged this reaction. Catalysts containg 6% CuO supported on H-ZSM-5 and H-MOR zeolites give high activities for…
The linear and third-order nonlinear optical absorption coefficients (ACs) and the refractive index change (RIC) for a spherical quantum dot, having a hydrogenic impurity under an applied magnetic field have been theoretically studied. In numerical calculations, a variational scheme is adopted within effective mass ap…
This paper investigates the structural stability of intermetallics R 3 Ni 13− x Co x B 2 ( R =Y, Nd and Sm) with Nd 3 Ni 13 B 2 -type structure and the site preferences of the transition element Co by using a series of interatomic pair potentials. The space group remains unchanged upon substitution of Co for Ni in R 3…
This paper reports that the green phosphor BaAl 11.9 O 19 :0.1Mn 2+ is prepared by a flux assisted solid state reaction method. The effect of flux systems on the crystal structure, morphology and luminescent properties of the phosphor are studied in detail. The samples are characterized by the application of x-ray dif…
The authors propose 4-alkoxy-3,5-diisopropyl-phenyl (DIPP) group as the most suitable substituent to realize porphyrin based advanced materials (PAMs). Our experiments reveal that DIPP achieved the introduction of the following properties on porphine and/or PAMs: (1) easy synthesis, (2) high solubility, (3) good cryst…
In this paper we study the effects of Single Walled Carbon Nanotube (SWCNT) diameter variations on performance and stability of 6-T SRAM cells. Parametric and Monte Carlo simulations are performed for SRAM designs based on different SWCNT mean diameters. Parameters such as read/write delays, Static Noise Margin (SNM)…
In this study, we report first-principles calculations of the elastic and thermodynamic properties for CdO in both the B1 (rocksalt) phase and B2 (cesium chloride) phase. The calculations are performed within the framework of density functional theory, using the pseudopotential plane-wave method. From the theoretical…
Abstract There are several benefits of using the supercritical fluid microcellular injection moulding process. The part weight, melt temperature, viscosity, moulding pressure, shrink/warpage, and cooling/cycle time are all significantly reduced. The purpose of this study is to investigate the rheological behaviour of…
This paper reports on the results of an investigation of the luminescence and magnetic properties of europium(III) carboxylates, which are determined by the structure of the Stark and Zeeman sublevels. It has been established that the energy splittings λlum between the 7 F 0 ground level and the 7 F 1 term in the lumi…
Abstract The microwave-assisted synthesis of poly(glycolic acid-co-lactic acid) (PGLA) copolymers by ring-opening polymerization of glycolide (GA) and L-lactide (L-LA) was studied. The microwave irradiation time and feed ratios on the molecular weights, as well as the thermal properties of the copolymers were discusse…
We describe the design and implementation of a high voltage pulse power supply (pulser) that supports the operation of a repetitively pulsed filtered vacuum arc plasma deposition facility in plasma immersion ion implantation and deposition (Mepiiid) mode. Negative pulses (micropulses) of up to 20 kV in magnitude and 2…
High-alumina fenites in the Mont Saint-Hilaire alkaline complex, Québec, Canada, form bodies at the contact of peralkaline nepheline syenite. Fenites are subdivided into four types: corundum-spessartine-biotite-feldspar, muscovite-corundum-hercynite-biotite-feldspar, carbonated muscovite-biotite-hercynite-feldspar, an…
As a thermal interface material, thermal grease (TG) has been extensively applied to facilitate heat dissipation in electronic devices. Despite the superior thermal conductivity of diamond, researches on diamond-containing TGs remain rare. In this study, four kinds of TGs in which diamond served as essential filler we…
Abstract Summary: Chitosan films and microspheres were prepared and their surfaces were functionalized with first generation dendritic molecules. The films were modified by Weisocyanate dendron, while Behera's and bis Behera's amine dendrons were used to modify the microspheres. Prior to dendronization films were prep…
This paper reports that the film composed of flower-like ZnO micro-spheres, which consists of nano-sheets, is fabricated by chemical bath deposition. By adding hydrogen fluoride (HF) into the reaction solution, which contains zinc nitrate hexahydrate and hexamethylenetetramine, the ZnO crystal growth process is change…
Two vanadium oxides [Ni(en) 2 (H 2 O) 2 ][Ni(en) 3 ] 2 [V 16 O 38 Cl] ・3(H 2 O) (1) (en = ethylenediamine) and (H 3 O) 2 V 3 O 8 (2) were hydrothermally synthesized and characterized by single-crystal X-ray diffraction. 1 consists of [Ni(en) 2 (H 2 O) 2 ] 2+ and [Ni(en) 3 ] 2+ cations, discrete [V 16 O 38 Cl] 6− clust…
Computer simulation tools are used to study the feasibility of graphene's applications for thermal management of electronic circuits. We simulated heat propagation in generic 3-D chips built on silicon-on-insulator substrates. Graphene and few-layer graphene were considered to be incorporated within the chips as heat…
Manitobaite, ideally Na 16 Mn 2+ 25 Al 8 (PO 4 ) 30 , is a new mineral species from Cross Lake, Manitoba, Canada. It occurs as large crystals or cleavage masses intergrown with other phosphate minerals in a phosphate pod in the intermediate and core zones of pegmatite #22 on the southeastern shoreline of a small unnam…
Electroplated cadmium and hard chromium have been used extensively as protective coatings for the most demanding aerospace applications. Despite excellent technical performance and low deposition costs, these coatings are being phased out from industrial usage because of the serious health and environmental hazards th…
The effect of operating parameters such as flow rate of CO2 and concentration of Ca(OH)2 on the particle size distribution, crystallite size, and induction period of nano calcium carbonate synthesis in a sonochemical carbonization process has been investigated. Synthesis of calcium carbonate was carried out by bubblin…