Materials Literature
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The use of unconventional methods for the preparation of Nanosized catalysts for the selective hydrogenation of acetylene and its homologs is considered. Based on published data and experimental data obtained in this work, it is shown that catalysts based on nanoparticles of palladium have a high activity, although th…
La 1-x Sr x MnO 3 (x = 0.1, 0.2, and 0.3) nanoparticles (LSMO NPs) were successfully synthesized by a simple sonochemical-assisted method. The prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The compositions of samples were…
Chemistry gives us the ability to manipulate atoms and molecules into nanometer and micrometer scale building blocks, while the science of crystallography is concerned with the spatial arrangement of atoms, ions, and molecules and thus the morphology and structures of materials. Complex three-dimensional ZnS nanostruc…
Abstract The interface formation between Au polycrystalline substrate kept at temperature of liquid nitrogen and Al deposit and its evolution during sample thermal treatments have been investigated by means of XPS. The intermixing of the Al and Au atoms at the interface occurred readily already at temperature of liqui…
In this work the magnetocaloric effect in ferrimagnetic rare-earth iron garnets R3Fe5O12 where R=Y and Dy was theoretically investigated considering a model Hamiltonian, which takes into account three coupled magnetic sublattices in the mean field approximation. In Dy3Fe5O12 the inverse magnetocaloric effect was predi…
ZnAl 2 O 4 : Cr 3+ (Co 2+ ) nanopowders were prepared by hydrothermal method and annealed at various temperatures. The samples were characterized by X – ray diffraction, transmission electron microscopy, photoluminescence and photoluminescence excitation spectra. The results show that crystal structure and optical pro…
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This study presents deodorizer (DO) distillate as a cheaper source of fatty acid to prepare alkyd resins. DO distillate-based alkyd resins provide encouraging film properties, except for color and clarity of resins. Thus, DO distillate based fatty acids are being explored as raw materials for alkyd resins in architect…
During the calibration or irradiation of dosemeters, typical irradiation geometries (collimated beams) and source-to-detector distances (1-5 m) lead to the fact that for photon energies above a few hundred keV, the secondary charged particle equilibrium is usually not ensured. The reason is that the effective beam rad…
Symmetry and electrostatic equilibrium in europium compounds are revisited with the aim of improving the role of obtaining the charge factors ( g j ), of the nearest neighbours (NN) of the lanthanide site, j running over the NN, now using the g j vs. R j (the NN position) linear behaviour. An inferior limit of the g j…
Simple strontium peroxodisulfate SrS 2 O 8 · 4H 2 O was synthesized by the reaction of solid Sr(OH) 2 · 8H 2 O taken in 30% excess with an aqueous solution of (NH 4 ) 2 S 2 O 8 ; simple magnesium peroxodisulfate MgS 2 O 8 · 6H 2 O was synthesized by the reaction of an aqueous solution of BaS 2 O 8 with a stoichiometri…
Abstract— Intensive research in bio-engineering has been conducted in the search for flexible biomaterials that could support cell growth and cells attachment. Flexible synthetic materials that support cell growth without the aid of synthetic extracellular matrix proteins are still rare. Cholesteryl liquid crystal c…
Sn-doped ZnO (x=0·0, 0·05, 0·10 and 0·15) films as antireflective coating (ARC) were successfully synthesised by electron beam evaporation method. X-ray diffraction (XRD) analysis confirmed that the as deposited films were hexagonal crystal structure of ZnO which is deteriorated by Sn dopant addition. Investigation of…
The River Axe, a lowland river in South-west England is used as a model system for describing how ecological status assessments can be applied in practice. Seasonal sampling over a three-year period established a strong baseline against which future changes could be assessed. These indicated that the river was enriche…
Abstract There are numerous bentonite deposits, formed by the alteration of volcanic rocks, in the Kapıkaya area (Eskişehir, western Turkey). These deposits can be classified into three groups according to their stratigraphical levels. X-ray diffraction (XRD), scanning electron microscope (SEM), major, rare-earth and…
Uma das principais vantagens do processo MIG/MAG é a alta produtividade. Na maioria das aplicações utiliza-se a polaridade positiva, devido a maior estabilidade do arco, geração de menos respingos e formação de cordões com geometria adequada. No entanto, em algumas aplicações, se demanda uma maior capacidade de produç…
Surface acoustic wave (SAW) propogation in Y-cut and Z-cut relaxor-based 0.67Pb(Mg(13)Nb(23))O(3)-0.33PbTiO(3) (PMN-33%PT) ferroelectric single crystals poled along [001](c) cubic direction has been analyzed theoretically. Characteristic curves were obtained for the phase velocity, electromechanical coupling coefficie…
Barium borate glasses doped with complex Pb 4 Lu 2 YbF 17 fluoride have been synthesized and investigated. Heat treatment produced glass ceramics containing the crystalline BaF 2 :Yb 3+ phase. The changes in the structural and optical properties of the glass ceramics were revealed by X-ray diffraction, Raman spectrosc…
A series of complexes of chitosans of various molecular weights (3000–150000) with copper, iron(II), and zinc sulfates were examined. Participation of amino groups of the polymer in coordination bonding with the metal was proved by IR spectroscopy. The affinity of chitosan for iron ions was enhanced by introducing phe…
A detailed understanding of blasting induced rock damage and fragmentation process is important to blasting design and parameter optimization. Due to the complexity of rock property and damage evolution, it is useful to deal with such problems through statistical methods. In this study, according to the critical fract…