Materials Literature
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The majority of power transformer high voltage bushings today are of the condenser oil impregnated paper (OIP) type. These bushings have a series of dielectric layers with conductive foils in between each layer, which improve electric field uniformity. This paper studies the electric field and potential distributions…
${\mathrm{Cr}}_{1\ensuremath{-}x}{\mathrm{Al}}_{x}$ exhibits semiconducting behavior for $x=0.15--0.26$. This Letter uses hard x-ray photoemission spectroscopy and density functional theory to further understand the semiconducting behavior. Photoemission measurements of an epitaxial ${\mathrm{Cr}}_{0.80}{\mathrm{Al}}_…
${\text{Gd}}_{5}{\text{Si}}_{x}{\text{Ge}}_{4\ensuremath{-}x}$ $(0\ensuremath{\le}x\ensuremath{\le}0.9)$ has been studied using neutron powder diffraction at a wavelength of $2.3724\text{ }\text{\AA{}}$. Antiferromagnetic ordering of the full $7\text{ }{\ensuremath{\mu}}_{B}$ Gd moments in the $Pn{m}^{\ensuremath{'}}a…
Sulphur hexafluoride (SF 6 ) has widely been used as an insulator in gas-insulated switchgear (GIS) applications. But due to the fact that it is a greenhouse gas, many researchers have been trying to find alternative solutions for it. Furthermore, SF 6 produces highly toxic and corrosive substances when it is subjecte…
The electronic ferroelectric lutetium ferrite (LuFe(2)O(4)) was studied by x-ray diffraction as a function of pressure. Pressure is shown to induce an irreversible rhombohedral to orthorhombic transition leading to a supercell determined by the combination of electron and synchrotron x-ray diffraction. This new config…
Phase states in sodium lauryl sulphate-water-1-decanol lyotropic liquid-crystalline system have been investigated for different temperature ranges. The dependence of triangle phase diagram types, phase boundaries, and sequence of lyotropic mesophases vs temperature has been found. The thermomorphologic, thermotropic,…
In this article, Ni0.5Zn0.5Fe2O4 ferrite powders were prepared by a reaction between Fe2O3, NiO, and ZnO powders in a molten salt. This article investigated the effects of firing temperature and holding time on the properties and microstructure of Ni-Zn ferrite powder via X-ray diffraction (XRD), field emission scanni…
A novel 1,3-dioxopyrrolo[3,4-b]porphyrin (2) has been synthesized in 70% yield following a [4 + 2] cycloaddition reaction of pyrrolo[3,4-b]porphyrin 1 with (1)O(2). The new imide was used as a template to other 1,3-dioxopyrrolo[3,4-b]porphyrins and to the corresponding open counterparts. The UV/vis absorption spectra…
Three new bimetallic oxamato-based magnets with the proligand 4,5-dimethyl-1,2-phenylenebis(oxamato) (dmopba) were synthesized using water or dimethylsulfoxide (DMSO) as solvents. Single crystal X-ray diffraction provided structures for two of them: [MnCu(dmopba)(H(2)O)(3)](n)·4nH(2)O (1) and [MnCu(dmopba)(DMSO)(3)](n…
We have investigated how the effectiveness of a corrosion inhibitor added to an aqueous solution to suppress the corrosion rate of steel is reduced by the addition of sand. The equilibrium adsorption isotherms of the inhibitor with respect to both the steel surface (consisting of iron carbonate under the corrosion con…
The ignition of magnesium alloy chips is an important problem during dry machining. In this paper, the influence of cutting speed, feed rate, and depth of cut on ignition of AM50A magnesium alloy during high-speed face milling was investigated. It was found that ignition could easily be caused under some cutting speed…
BaTiO 3 ‐based multilayer ceramic capacitors (MLCCs) using Ni base‐metal electrodes (BME) exhibiting EIA‐X7R dielectric behavior are represented by the characteristic microstructure of core–shell grains. In the present study, the crystalline phase contents in the mixture were determined quantitatively for two groups o…
Fluorescent conjugated polyelectrolytes (CPEs) have attracted considerable interest over the past decade as novel materials for developing biosensing schemes and sensing devices for biomolecules. This interest stems from the exquisite polymer sensitivity to the presence of fluorescence quenchers, enabling amplified se…
A new photo-controlled anticancer drug release system is reported based on the photo-induced electron transfer (PET) between semiconductor quantum dots (QDs) and N-methyl-4-picolinium (NAP) ester 1 under the excitation of visible light.
The reduction by CO under dry conditions of NO x species stored at 350 °C onto a Pt−K/Al 2 O 3 lean NO x trap catalyst is investigated by means of transient response methods (CO-TPSR and CO-ISC experiments) and complementary FT-IR spectroscopy. The results show that the pathway for the reduction of stored NO x by CO u…
In this research, a sol-gel auto combustion route has been proposed to synthesize LaAlO3 nanopowders, using lanthanum nitrate, aluminum hexahydrate, and different fuels such as citric acid, oxalic acid, and tartaric acid. The formation temperature of LaAlO3 and its crystallite size in the presence of different fuels w…
White light phosphors have been synthesized by solid-state reaction. The phosphors are characterized by X-ray diffraction patterns, room temperature photoluminescence excitation spectra, and room temperature photoluminescence (PL) emission spectra. Under host sensitization and direct 4f–4f excitation, the activator ex…
We employ a finite element framework, coupled to cohesive elements, to model material decohesion of a uniformly expanding ring. Our study focuses on the average fragment mass, the distribution of fragment masses, and the heaviest fragments. The computed fragment mass distributions are best captured by generalized gamm…
The ac conductivity spectra of xAgI-(1 - x)AgPO(3) fast-ion conducting glasses spanning the flexible, intermediate (isostatically rigid), and stressed rigid phases are analyzed. The rescaled frequency-dependent spectra are mapped into time-dependent mean-square displacements out of which a typical length scale charact…
The formation of the FeSe compound from a mixture of Fe and Se powders encased in a composite Cu/Nb sheath was studied in situ by means of high-energy synchrotron x-ray diffraction. Tetragonal β-FeSe does not seem to form directly from the starting elements. Instead, a sequence of FeSe 2 , Fe 3 Se 4 and Fe 7 Se 8 phas…