Materials Literature
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A high-precision and low cost system was built for the electrical characterization of ceramic thermistors at low temperatures, using components readily available in materials research laboratories. The system presented excellent reproducibility in the electrical characterization of NTC ceramic sensors from -75 ºC (195…
For the following systems Al-Ti, Al-Ni, Al-Zr, Al-Cr, Al-Fe, Al-V the wide range of intermetallic\ncompounds based on aluminum was considered. Thermodynamic parameters such as Gibbs energy\nand formation enthalpy characterizing the properties of resulting intermetallic compounds were\ncalculated. The relations of thes…
Active Power Filter has become popular choice to address the harmonic pollution present in power system. It relies on fast and accurate detection of reference current to guarantee efficient compensation performance. In this paper harmonic extraction using d-q Synchronous Reference Frame (SRF) for single phase system a…
Polycrystalline Cadmium sulfide (CdS) films were deposited onto Corning glass substrates from alkaline solutions containing CdCl2, KOH, Na3C6H5O7 and CS(NH2)2 at different deposition times (10, 20, 30, 40 and 50 min), bath temperatures (80 ±2 °C) and different concentration of the reactants. A comparative study was pe…
A general system of equations for a corona discharge has been derived and reduced to a dimensionless form using the methods of the similarity and dimension theory. Criteria and conditions for the similarity of the processes occurring during a corona discharge have been determined. Formulas for free space-charge densit…
Abstract This paper presents investigations of a sequential machining process which incorporates CBN hard turning with cryogenic pre-cooling of the workpiece (CHT) and ball burnishing (BB). The main goal of this study was to select machining conditions enhancing the quality of parts machined by hard turning including…
Abstract Novel mixed ligand complexes containing thiophene-2-carboxylic acid (HTCA) and imidazole (im) ligands, [M(TCA) 2 (H 2 O) 2 (im) 2 ] (M: Mn, Co, Cd) and [Cu(TCA) 2 (im) 2 ] were obtained. The complexes were characterized by X-ray single crystal diffraction. Also, spectroscopic (IR and UV-Vis), magnetic and the…
The results of the chemical analysis of alkali silicate glass of the Li 2 O-LiF-BaO-SiO 2 system are under consideration. Conclusions on the fluorine loss from the melt in the form of LiF and SiF 4 during the synthesis were drawn.
Metastable graphite inclusions have been studied in diamond, forsterite, and orthopyroxene synthesized in silicate-carbonate-fluid and aqueous chloride systems at 6.3–7.5 GPa and 1400–1600°C. The graphite inclusions were studied using optic microscopy and Raman spectroscopy. It has been established that graphite in di…
The microstructures and magnetic properties of FePt(-SiOx-C) thin films grown on TiON and TiON/TiN intermediate layers were studied. TiON possessed smaller surface energy and smaller lattice constant than TiN. With increasing TiOx doping concentration, FePt grain shape changed from semi-spherical to square and grain s…
Abstract In order to establish a strategy for minimizing Pt usage in catalysts for aqueous-phase reforming of glycerol, we studied turnover frequency (TOF) using a series of Pt/Al2O3 catalysts with different mean Pt diameters. It was found that TOF increases with decreasing Pt diameter, and the increase is drastically…
Bulk heterojunction (BHJ) organic photovoltaic (OPV) devices are generally composed of a blend film of a π-conjugated polymeric electron donor and a C60 derivative electron acceptor intercalated between an anode and a cathode, typical of a two-dimensional device structure. Often, a regioregular poly(3-hexylthiophene)…
The effect of the preliminary holding of the BS-100 “white soot” at 150–155°C for 6 to 7 h and the crystallization conditions on both the characteristics of powdered MOR zeolite samples (degree of crystallinity, composition, particle size composition, and adsorption of C 6 H 6 molecules) and their catalytic properties…
The effect of the processes of the electrodischarge treatment of organic liquids and the generated gases on carbon nanomaterials (CNM) and hydrogen has been experimentally studied. It is shown that the three-stage treatment of organic liquids and the generated gases in a flow mode allows the increase of the efficiency…
Soils in the Kansas Cherokee Prairies have formed in various parent materials and exhibit differences in the degree of expression of vertic properties. Despite large clay contents, few soils meet the criteria for a Vertisol. In an effort to investigate the cause of these differences, pedogenic processes, primarily cla…
Abstract Poly(vinylidene) fluoride (PVDF) nanocomposite samples were prepared by incorporation of carbon nanotubes (CNT) and nanoclay into PVDF using a twin screw extruder. Carbon nanotube was added to improve electrical conductivity and nanoclay was included to enhance β crystal formation for piezoelectric property.…
Nonlinear inductors have wide applications in DC/DC converters. The multi-hole multi-permeability nonlinear inductors have been proved to have gradually changing wide-range inductance curve while requiring no extra DC bias, which makes them suitable in various high efficiency DC/DC converters. This paper focuses on th…
Present growing demand for renewable, environment friendly and biodegradable insulating liquids for high voltage applications lead to find the potential alternative to petroleum based mineral oil as insulating medium. In this paper, an attempt is made to find the alternative insulating fluid with better insulating cha…
Abstract Basing on long-standing cyclic measurements of sludge-originated biogas composition and considering statistical analysis of their results, a regression model describing time variation of biogas desulfurization using bog iron ore has been developed. The model was verified by theoretical calculations and result…
Abstract Flake graphite cast iron was hot-dip coated with pure aluminium or aluminium alloys (AlSi11 and AlTi5). The study aimed at determining the influence of bath composition on the thickness, microstructure and phase composition of the coatings. The analysis was conducted by means of an optical microscope and a sc…