Materials Literature
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The changes in the microstructural and electrical properties of multi stacked GeTe/InTe layers were investigated. When the GeTe layer was thicker than the InTe layer, a Ge(In)Te phase occurred only after annealing. Although crystallization should originate from the GeTe layers, there was a uniform distribution of Ge a…
A chemiluminescence-based analyzer of NOx gas species has been applied for high-throughput screening of a library of catalytic materials. The applicability of the commercial NOx analyzer as a rapid screening tool was evaluated using selective catalytic reduction of NO gas. A library of 60 binary alloys composed of Pt…
The ferromagnetism induced by nitrogen (N) or carbon (C) atoms in magnesium oxide (MgO) is studied by using ab initio calculation based on the density functional theory. The calculation shows that single N or C impurity may induce local magnetic moment to MgO due to the localization ofp-electrons. Moreover, the calcul…
The soundness of a gas-filled power transformer under an operating voltage is evaluated in partial discharge (PD) test of long-duration ac withstand voltage test. To establish clear control criteria for this PD test, the authors initially conducted a study on the harmful PD level of materials themselves used in a gas-…
Nuclear pseudoquadrupole resonance of 141Pr in Van Vleck paramagnet PrF3 has been observed in singlecrystal and micro- and nanopowder samples at a temperature of 4.2 K. The spectra of nuclear pseudoquadrupole resonance of 141Pr, as well as the spin-spin and spin-lattice relaxation parameters, have been obtained. The p…
Thermal expansion, permeability and magnetization measurements of the ferromagnetic shape memory alloys, Ni 2 MnGa 0.88 Cu 0.12 , were carried out across the martensitic transition temperature T M and the reverse martensitic transition temperature T R at atmospheric pressure. When cooling from the austenite phase, a s…
Adsorption isotherms of agar and agar/clay nanocomposite films prepared with different types of nanoclays, that is, a natural montmorillonite (Cloisite Na(+) ) and 2 organically modified montmorillonites (Cloisite 30B and Cloisite 20A), were determined at 3 different temperatures (10, 25, and 40 °C). The water vapor a…
So far available experimental data on the magnetic ground state and transport behaviors of CaCrO3 are conflicting, suggesting that the electronic structure may be fragile against intrinsic or external perturbations. In this work we perform full-scale first principles calculations on the magnetic ground state and elect…
UV photodetectors based on ZnO nanorods prepared by two methods have been fabricated by a simple drop casting procedure. The detectors show good performance at 375 nm giving satisfactory values of responsivity, external quantum efficiency and photoconductive gain. The performance of ZnO nanorods prepared at low temper…
Successive magnetic-field-induced charge-density-wave transitions in the layered molecular conductor α-(BEDT-TTF)2KHg(SCN)4 are studied in a hydrostatic pressure regime in which the zero field charge-density- wave (CDW) state is completely suppressed. It is shown that the orbital effect of the magnetic field restores…
Abstract Ba 1− x Dy x Co 2 Fe 16 O 27 ( x = 0.00, 0.05, 0.10, 0.15, and 0.20) was prepared by the solid‐state method. The phase structure was studied using powder X‐ray diffraction (XRD), the electromagnetic properties were measured, and the reflection loss of Dy 3+ ‐doped ferrite material was calculated using electro…
A ceramic based on zirconia partially stabilized by yttrium oxide has been prepared. The main properties of the prepared ceramic have been characterized: density, ultimate strength under twisting, microhardness, elasticity coefficients, etc. The microstructure and phase composition of the ceramic and its phase transfo…
Mass attenuation coefficients of glass systems xPbO: 20Na 2 O: (80-x)B 2 O 3 (x = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55% mol) were determined at 662 keV photon energy using gamma rays transmission method. The theoretical values of mass attenuation coefficients were calculated by WinXCom program. These coefficie…
At the Tritium Laboratory Karlsruhe stainless steel cross-piece ionization chambers have been used to measure the activity concentration of tritiated gases in experiments and processes for more than 10 years. New chambers with an optimized design in terms of the effective chamber volume were produced. Furthermore, the…
The article contains information on research carried out in Electric Faculty of Silesian University of Technology, made at test stations and aimed at diagnosis how is actual technical state of high voltage power oil transformers. Opinion on a state of transformers is based on analysis results of partial discharge meas…
The concept of energetic efficiency in equipments is highlighted nowadays, due to its implication with the global warming issues. Amongst industrial equipments, burners have one of the greatest impacts on this discussion, since they are large scale combustion devices. The search for more efficient burners is of paramo…
This paper, the first of three parts, deals with the penetration depth and concentration of silicone fluid in cable insulation and its duration when injected in real-size, service-aged 28-kV extruded cables and subjected to various simulated service conditions in the laboratory. There were four aging conditions, namel…
Crosslinked polyethylene (XLPE) has been used as cable insulation since the 1960s, due to its favourable combination of electrical and mechanical properties. However, a fundamental consequence of crosslinking is limited recyclability. Although technologies are being developed to facilitate the re-use of XLPE at the en…
The application of electroplated magnetic materials for improved shielding of inductive coil structures produced using printed circuit board (PCB) technology is demonstrated. In this way, the range of shielding materials available for use in PCB as a replacement for ferrite is increased, so that a wider range of appli…
We report a simple, low cost and eco-friendly synthesis of Cu2O nanoparticles by reduction of Fehlings solution using Manihot esculenta leaf extract containing reducing sugars which act as reducing agent. The purification process of the Cu2O product does not require expensive methods, since a solid product is obtained…