Materials Literature
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Electronic structures, magnetic and optical properties of Ce-doped zinc-blende ZnO are studied by the first-principles of local spin density approximation based on the density function theory (DFT). Band structures, total density of states (TDOS), partial density of states (PDOS), ferromagnetic (FM), antiferromagnetic…
The magnetic properties of nonstoichiometric lanthanum manganites La1–x Mn1–y O3 have been studied in the temperature range 80 K < T < 650 K. The Curie temperature T C changes nonmonotonically as the number of Mn4+ ions increases. In the paramagnetic region, there exist isolated Mn ions and magnetic polarons which can…
DC and AC electrical properties of hybrid films, consisting of carbon nanotubes and tungsten disulfide nanotubes (and fullerene like nanoparticles) were studied within the 2 – 300 K temperature range and over the 20 Hz – 1 MHz frequency range. The temperature dependences of the resistance R(T) exhibit behavior typical…
Sulfur nanoparticles (S NPs) were prepared by a quick precipitation method in the absence and presence of tetraoctylammonium bromide (TOAB) that was used as a stabilizer to control the nanoparticles size. Scanning electron microscope (SEM), transmission electron microscope (TEM) and X-Ray Diffraction (XRD) were used t…
This paper will discuss insulation dissection for different insulation systems and different failure mechanisms. The preparation process and inspection tools necessary for dissection will be presented. The key principles for performing insulation dissection on different insulation systems will be presented along with…
The wear behaviour of thick molybdenum coatings deposited by electric arc thermal spray on steel support was investigated by micro-abrasion, a relatively recent introduced method for small scale wear testing. The wear mechanisms and wear rates without coatings penetration were investigated with respect of time corresp…
An image converter tube with a magnetic lens was used to obtain static images of moiré fringes formed by electron beam. These moiré fringes are formed due to the interference between the anode mesh and the photocathode containing slits of various spatial frequencies. Moiré fringes are observed at an accelerating volta…
Abstract Complexes of the type [MCl 2 (7‐nitro‐1,3,5‐triaza‐adamantane) 2 ] (M = Zn(II), Pd(II), Pt(II)) and [MCl 2 (H 2 O) 2 (7‐nitro‐1,3,5‐triazaadamantane) 2 ] (M = Mn (II), Co(II), Ni(II)) have been prepared and their structures have been analysed by X‐ray crystallography, elemental analysis, IR and solid state 13…
Microfibrillated cellulose (MFC) can be used in many industrial areas such as composites for construction, automotive, furniture and new materials for electronics and pharmaceutical applications as well as thickener in cosmetic products. It can be isolated from different lignocellulosic materials using numerous techno…
The article offers the finite element meshing algorithm for calculating the stress-strain behavior of various structures with stress-raisers. The advantages of the developed algorithm over the algorithm realized in ANSYS are shown.
We investigate the possibility of fabricating high-mobility hydrogen-doped indium oxide (IO:H) using gaseous hydrogen instead of water vapor during sputtering. A sputtering tool equipped with a residual gas analyzer allows us to monitor the partial pressure of H2, O2and H2O in the system, and to link the gas compositi…
We demonstrate that self-collimation effects in the invisibility cloak medium formed from 2D dielectric Photonic Crystal (PhC) can support wave propagation along curvilinear paths around an object to be hidden, with superluminal phase velocities controlled by deformation of PhC lattice cells. These effects can be used…
ZnO nanorods (NRs) were synthesized using an in situ low-temperature hydrothermal method. In order to investigate the effect of different seed layers on quality of ZnO NRs arrays, alcoholic, alkaline and acidic seed solutions were deposited by spin coating on ITO-glass substrate. Experimental results revealed that the…
The summary reflects wave propagation of microwave bands from 3.2 till 4.4 GHz in foams with bubbles of size 0.7–2 mm. Results of experimental research and calculations of the electric characteristic e and tgd were presented.
Severe plastic deformation is a technical method to produce functional material with special properties such as high strength and specific physical properties. Selection of an efficient severe plastic deformation for grain refinement is a challenging field of study and using a modeling technique to predict the refinem…
RESUMO O isolamento de nanocristais de celulose (CNCs) de fibras vegetais é uma alternativa promissora para sua aplicação como reforço em matrizes poliméricas. A caracterização dos CNCs é fundamental para a confiabilidade da técnica, além de determinar as aplicações possíveis a partir de cada tipo de fibra. A partir d…
This article considers the problem of evaluating the effectiveness of energy-saving solutions in the aspect of the task to determine the timing of capital repairs of apartment buildings. The method of numerical simulation lifecycle of buildings is offered as a solution to this problem. It is proved that implementation…
Utilization of plastic waste can be used as an ingredient added to the binder layer of asphaltconcrete (AC-BC). The purpose of this study was to determine the characteristics of the Marshallparameters due to the addition of PET (Polyethylene Terephthalate) in the binder layer of asphaltconcrete (AC-BC) using the metho…
Substantial defects are produced in Al 2 O 3 by 4 MeV Au ion irradiation with a fluence of 4.4 × 10 15 cm −2 . Rutherford backscattering spectrometry/channeling and cross-sectional transmission electron microscopy methods are used to investigate the irradiation damage. The 190 keV H ions with a fluence of 1 × 10 17 cm…
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