Materials Literature
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The effect of carbonyl groups on crystalline polyethylene has been studied through computation of the energy band diagram and density of states using density functional theory (DFT). Carbonyl impurity states reduce the effective band gap by about 2.35 eV.
In order to investigate the different properties of electric charge accumulation by electron beam irradiation between a saturated hydrocarbon and an aromatic hydrocarbon, an electron affinity and a trap depth for both hydrocarbons were calculated by using Molecular Orbital method. From calculated results, the relation…
Electronic structures of individual β-FeSi2 nanodots were investigated using electric field modulation spectroscopy combined with scanning tunneling microscopy (STM-EFMS) by optimizing experimental conditions to enhance the inherently small signal due to a small number of photocarriers generated in a single nanodot. T…
A study of fluctuation is one of the main issues in fusion plasma researches. The potential and its fluctuation are measured by a gold neutral beam probe (GNBP) in the tandem mirror GAMMA10. Since there is no stable isotope ((197)Au approximately 100%), there are little measurement errors. GNBP system can measure the…
The electron work function, contact potential difference, and surface tension of elastically deformed faces of metal with an insulating coating have been calculated within the Kohn-Sham method. The calculations demonstrate the opposite deformation dependences of the electron work function and contact potential differe…
Thin films and coatings of permanent magnetic materials are very important for different electronic and micromechanical applications. This paper deals with the fabrication, using pulsed laser deposition (PLD) technique, of good quality magnetic SmCo thin films on polycarbonate, steel, silicon and amorphous quartz subs…
Physicochemical properties of condensed sodium tetrafluoroaluminate are investigated by methods of thermogravimetry, high-temperature X-ray phase analysis, and thermodynamic calculations of the phase diagram of the NaF-AlF 3 system. It is shown that it is possible to use this compound as a correcting additive to elect…
Highly oriented ZnO nanorod arrays were successfully prepared on the indium tin oxide (ITO) substrate using a galvanostatic electrodeposition method. The ITO substrate was pretreated with ZnO nanoparticles via simple low-temperature solution route. The crystallinity, micro- structure of surface, and optical properties…
Abstract The scanning vibrating electrode technique (SVET) was applied to study the corrosion resistance of partially coated (Zn and various Zn‐Co‐Fe alloys) and partially exposed steel samples in 10 mM NaCl solution. The sacrificial properties and the protection range decreases with increase in Co content in the allo…
The Tl 2 MoO 4 -Nd 2 (MoO 4 ) 3 -Hf(MoO 4 ) 2 system was studied in the subsolidus region using X-ray powder diffraction. New triple molybdates were found to exist in this system: Tl 5 NdHf(MoO 4 ) 6 (5: 1: 2), TlNdHf 0.5 (MoO 4 ) 3 (1: 1: 1), and Tl 2 NdHf 2 (MoO 4 ) 6.5 (2: 1: 4). The first TlNd(MoO 4 ) 2 single cry…
Sgr A* is the closest massive black hole and can be observed with the highest angular resolution. Nevertheless, our current understanding of the accretion process in this source is very poor. The inflow is almost certainly of low radiative efficiency and it is accompanied by a strong outflow and the flow is strongly v…
C. G. Bathke, G. D. Jarvinen, R. K. Wallace, J. R. Ireland, and M. W. Johnson, Los Alamos National LaboratoryBrad W. Sleaford, Bartley B. Ebbinghaus, and Keith S. Bradley, Lawrence Livermore National LaboratoryBrian A. Collins, Brian W. Smith, and Andrew W. Prichard,Pacific Northwest National Laboratory10
The article is a continuation of the review concerning edible food packaging made of natural polymers (proteins or polysaccharides, see Part 1. Polimery, 53, No. 9). Various methods of modification (physical, chemical or enzymatic cross-linking) of packaging films made of such materials were presented. Cross-linking i…
In this paper, a hybrid power system supplied by a fuel cell and a lead-acid battery is realized by using the digital signal processor (DSP) TMS320LF2407 for power management and interleaved control. When the power provided from the fuel cell is higher than the load power, the extra energy may be used to charge the le…
This paper describes how to optimize the winding structure of LSPM with FEM, which includes the determination of turns ratio of the main and auxiliary windings, and the selection of capacitor. The motor can be optimized on the ground of the rough value of the windings ratio and the capacitor. The winding structure of…
The paper mainly researched how the Wye and delta connection affect the copper losses in induction motor under over-voltage condition. The multi-slice time-stepping finite element method (FEM) was utilized to calculate the copper losses of a 5.5-kW skewed motor under no-load and different load conditions respectively.…
Abstract Cold neutrons have a wavelength that is in the same range as the dhkl spaces for polycrystalline metal materials. Therefore imaging of polycrystalline materials with monochromatic cold neutrons provides a unique contrast due to coherent Bragg scattering. Here, we present investigations of metallic materials w…
The distinctive characteristics of nanoparticles (NPs), resulting from properties that arise at the nanoscale, are stimulating the use of these particles in the biomedical sector for diagnostic and therapeutic purposes. However, these same characteristics of NPs also underlie widespread concerns regarding potential to…
Electrical arc furnace (EAF), acting as a fast varying real power and reactive power sink, not only induces the power quality pollution back to utility, but also prevent the effective production of metal industry. In this paper, a methodology of designing an energy storage system (ESS) for EAFs is presented. Based on…
Partial discharge (PD) pattern recognition and interpretation is still often the key to assess the presence and the nature of defects inside electrical insulation. In the case of external PD source, as when surface partial discharges are concerned, the PD pattern can be strongly influenced by the environmental conditi…