Materials Literature
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High frequency current transformers (HFCT) are now widely used for partial discharges detection and measurement, specially for partial discharge location and source identification. However, many difficulties arise due to HFCT in the determination of the apparent charge in picocoulombs (pC) because of large variations…
A comparative study of pure CoFe2O4 nanoparticles and La-doped CoFe2O4 nanoparticles, prepared by microemulsion route has been performed. The samples were characterized using x-ray diffraction and transmission electron microscopy in order to obtain average particle size. The doping of small amount of La3+ ions (up to…
BACKGROUND: Nanoliposomes are designed as carriers capable of packaging drugs through passive targeting tumor sites by enhanced permeability and retention (EPR) effects. In the present study the biodistribution, pharmacokinetics, micro single-photon emission computed tomography (micro-SPECT/CT) image, dosimetry, and t…
Four important models for explaining the properties that are observed in polymer based nanocomposites are the multi-core model, the intensity model, the interphase volume model and the double layer model. This paper outlines a new model, based on those four, which aims to explain certain properties that are considered…
An electrochemical sensor was developed by using poly(3,4-ethylenedioxy thiophene) electrode in presence of different types of surfactants. Voltammetric behavior of isoniazid was studied at this electrode in the presence and absence of SDS and CTAB and interesting electrocatalytic effects were found. The presence of s…
Recent research results demonstrate that demagnetizing factors for various geometries can be precisely determined by employing 3-D electromagnetic field simulation. Using a technique developed by the authors, the demagnetizing factor resulting from the simulations match very well with experimental results for several…
Polyvinyl alcohol-degrading enzymes (PVAases) have a great potential in bio-desizing processes for its low environmental impact and low energy consumption. In this study, the effect of yeast extract on PVAases production was investigated. A strategy of four-point yeast extract addition was developed and applied to max…
Znic oxide nano- and submicro-structures have been synthesized controllably by the polymeric precursor method (Pechini). In this approach, zinc acetate Zn(CH3COO)2.2H2O, citric acid and ethylene glycol were used as the source of Zn2+, the chelating agent and the connecting agent, respectively. The microstructure of th…
Versatile high-throughput characterization tools are required for the development of new materials using combinatorial techniques. Here, we describe a modular, high-throughput test stand for the screening of thin-film materials libraries, which can carry out automated electrical, magnetic and magnetoresistance measure…
Galfenol (Fe100-xGax) and related alloys are very promising new magnetostrictive materials for broad applications. Using the density-functional full-potential linearized augmented plane wave method, we performed systematic theoretical investigations to explore the mechanism that governs the large enhancement of magnet…
Abstract With the publication of EN ISO 6892-1:2009 [1], the harmonisation of tensile testing at room temperature in Europe was achieved by combining EN 10002-1:2001 [2] with ISO 6892:1998 [3]. Essential changes are the introduction of the strain rate and the strain rate control as the significant testing rate or cont…
We report the geometric and electronic effects of amine (with one lone pair electron) and thiol (with two lone pair electrons) ligands on the structural transformation of Pt(55) nanoparticles (NPs) by first-principles calculation. Although a cuboctahedral (COh) structure is less stable than an icosahedral (Ih) structu…
Chemical and structural variations of 11 minerals of the cancrinite group having an Al,Si,O framework of the AB type are summarized and discussed. The total number of chemically studied samples is 360 (our data and literature data): cancrinite 192 and 35, vishnevite 21 and 13, cancrisilite 19 and 10, kyanoxalite and o…
In this paper we investigate the causes of the chromatic alteration observed in chloroform solutions of poly (2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) after gamma ray irradiation. Structural and chemical changes were analyzed by gel permeation chromatography, fourier transform infrared spectro…
The authors investigated the effects of a corner that affects the transmission characteristics of a partial discharge (PD) induced electromagnetic (EM) wave, using a gas insulated switchgear (GIS) model with an L-shaped branch. The authors also experimentally investigated the change of amplitude of PD-induced EM wave…
Abstract Gold nanorods (GNRs) are routinely prepared by the seed‐mediated growth method under the assistant of surfactant CTAB and it is important to understand the factors that control the formation process of GNRs. Here we investigated systematically how the pH conditions contribute to the GNR morphology and size ev…
To describe the vector magnetic hysteresis phenomenon of electrical steel sheets, an improved vector Jiles-Atherton hysteresis model is presented. The proposed model is developed based on Berqvist model. First, the anhysteretic magnetization function is improved by modifying the model parameters according to the excit…
Mechanical alloying of (Fe70Ni30)89Zr7B4powders leads to the formation of a γ-FeNi phase. In order to obtain single γ-phase, a powdered sample was solution annealed in the γ-phase field and water quenched. The Curie temperature of this powder was slightly higher than room temperature. The refrigerant capacity calculat…
This work describes the effect of sonication time and dispersing medium on the dispersion state of 0.1 wt.% MWCNT in a MWCNT/epoxy composite system. Epoxy, hardener, and epoxy/solvent were used as dispersing media in this study. Tensile strength, Young's modulus, and strain at failure were measured under different dis…
Since electric wires and cables play very important roles of supplying electric power and transmitting information and control signals, their degradation may cause a serious problem. In the present research, we examined the applicability of the broadband impedance spectroscopy (BIS) to monitor the degradation of cable…