Materials Literature
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Abstract Silylated kaolinites were synthesized at 80°C without the use of inert gas protection. The method presented started with mechanical grinding of kaolinite, followed by grafting with 3- aminopropyltriethoxysilane (APTES). The mechanical grinding treatment destroyed the ordered sheets of kaolinite, formed fine f…
Aluminum nitride (AlN)/boron nitride (BN) bishell hollow nanofibers (HNFs) have been fabricated by successive atomic layer deposition (ALD) of AlN and sequential chemical vapor deposition (CVD) of BN on electrospun polymeric nanofibrous template. A four-step fabrication process was utilized: (i) fabrication of polymer…
Perovskite series GdCr 1− x Co x O 3 ( x = 0, 0.33, 0.5, 0.67 and 1) was obtained using a solution combustion method. The powder XRD was used for identification and structural characterization of the obtained perovskites. All compounds crystallize within the space group Pnma . The morphology of samples was studied usi…
Automated sewing is a complicated task in manufacturing. Due to the non-rigid work pieces and variations in the material characteristics, sensor-based control has to be used to accomplish the sewing operation. This paper presents a strategy for velocity synchronization and corner matching in an automated sewing cell b…
The manufacturing influence on the magnetic properties and iron losses in stator cores made of cobalt-iron is investigated in this study, with a focus on the annealing and stacking process. Hysteresis and iron loss curves from measurements as well as a microscopic structure analysis are presented. FEM simulations are…
Chromium dioxide (CrO2) is an ideal material for spin electronic devices since it has almost 100% spin polarization near Fermi level. However, it is thermally unstable and easily decomposes to Cr2O3 even at room temperature. In this study, we try to improve the thermal stability of CrO2 thin films by doping with Sn wh…
The etching characteristics of the commonly utilised Si (100) facet at high temperatures near the boiling point in surfactant‐modified tetramethylammonium hydroxide (TMAH) solutions are investigated. Solutions of 25 wt% TMAH are selected because of the etching stability and the rate of addition of the surfactant Trito…
Results of five induction motor efficiency measurements according IEC 60034-2-1 are presented. The uncertainty of the measurements is analyzed using scientific and numerical methods.
The structural (specific surface area, liquid-filtration coefficient, average pore radius, volume porosity, and structural-resistance coefficient) and electrokinetic (counterion transport numbers, specific electrical conductivity, and electrokinetic potential) characteristics of porous glasses with different compositi…
The electronic structure of tin dioxide has been theoretically studied within the linearized augmented plane wave method using the Wien2k program package. The total and local partial electron densities of states have been calculated. The X-ray emission K-spectrum of oxygen has been calculated. The X-ray absorption spe…
We report our theoretical calculations on the temperature and energy dependent electrical conductivity of gapped graphene within the framework of Boltzmann transport formalism. Since screening effects have known to be of vital importance in explaining the conductivity of gapless graphene therefore we first worked out…
The punching of electrical steel sheets to manufacture iron cores for electrical machines can influence drastically the final magnetic properties of stator and rotor cores. In this paper, the influence of punching on the magnetic properties is studied on 5 mm wide ring core samples. Six different fully processed non-o…
Quantum chemical calculations, based on DFT methods at B3LYP/6-31G** level of theory, were performed, by means of the G03 set of programs, on four pyridine-pyrazole compounds. The objective of this work was to attempt to find relationships between the intrinsic electronic properties and inhibiting efficiencies of two…
Magneto-dielectric effects in self-assembled core-shell nanoparticles of nickel ferrite (NFO) and barium titanate (BTO) have been investigated in the millimeter wave frequencies. The core-shell nano-composites were synthesized by coating 100 nm nickel ferrite and 50 nm barium titanate nanoparticles with complementary…
Evolution of the structure of tough-pitch copper upon severe deformation by high-pressure torsion at room temperature and in liquid nitrogen is studied. The thermal stabilities of the resulting structures are investigated. The state of grain boundaries is examined by means of Mössbauer emission spectroscopy. Factors t…
The desirable properties of a matrix for tissue engineering applications appears to shift from a minimal model of supporting cell growth to a more inclusive role as a matrix to trigger the regeneration process. This requirement has propelled efforts towards bio-functionalization of matrices both by chemical and textur…
In this study, an effort was made to develop an experimental protocol to study the effects of accelerated ageing on composite materials based on bamboo and steel fibers. The physic-mechanical properties of different types of steel and bamboo fibers were investigated. Specimens were subjected to environmental agents. M…
The occurrence of dysfunctional aortic valves is increasing every year, and current replacement heart valves, although having been shown to be clinically successful, are only short-term solutions and suffer from many agonizing long-term drawbacks. The tissue engineering of heart valves is recognized as one of the most…
Single-crystalline BaTiO 3 nanocubes were synthesized by a hydrothermal method using a water-soluble titanium complex and surfactants. Ordered assemblies of BaTiO 3 nanocubes were directly fabricated on substrates by the dip-coating method. To optimize the conjugation of the nanocubes, the sintering temperature was ch…
Graphene nanoribbons (GNRs) were synthesized by longitudinal unzipping of multiwall carbon nanotubes (MWCNTs), and changes in Raman spectra were followed. Transmission electron microscopy was used to investigate the longitudinal opening of carbon nanotubes. Height and height profiles of GNRs are observed by atomic for…