Materials Literature
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This paper shows the space charge behavior of LDPE-based nanomaterials containing graphene oxide as a filler. Space charge was evaluated through the pulse electroacoustic technique at 40 kV/mm and two temperatures, i.e. 20°C and 40°C. From experiments a massive bipolar charge injection and accumulation at room tempera…
Functionalized wool with cobalt(II), copper(II), and iron(II) tetrasulfophthalocyanine (CoTSPc@wool, CuTSPc@wool, and FeTSPc@wool) have been synthesized and their structures characterized by flame atomic absorption spectroscopy (FAAS), FT-IR, UV-vis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning…
This paper presents an experimental investigation of semi-conductive internal defects present in a 69 kV composite insulator based on E-field measurements. For this purpose, an electro-optic sensor with compact E-field probe was used. In order to simulate the presence of internal defects, an experimental 69 kV composi…
Introduction Various works have shown that diamond-like carbon (DLC) coatings are able to improve the cells adhesion on prosthesis material and also cause protection against the physical wear. On the other hand there are reports about the effect of substrate polishing, in evidence of that roughness can enhance cell ad…
Multi-physical processes of a strong electric field perturbations in a solid dielectric near various water micro-inclusions jointed by conductive channels are studied. It is simulated the closely located water micro-inclusions of spheroid shape with water treeings on its surface, which are connected by cylindrical cha…
The paper presents the study of diffusion of chemical elements through a brazing joint, between two thin components (0.5mm) made of stainless steel 304. An experimental brazing filler material has been used for brazing stainless steel component and then the diffusion phenomenon has been studied, in terms of chemical e…
Abstract In this work the X-ray diffraction, scanning electron microscopy, Raman and dielectric studies of lead free perovskite (1 – x)Ba0.06(Na1/2Bi1/2)0.94TiO3–xNaNbO3(0 ⩽ x ⩽ 1.0) ceramics, prepared using a standard solid state reaction method, were investigated. X-ray diffraction studies of all the ceramics sugges…
The synthesis of CaAl-layered double hydroxide (CaAl-LDH) nanoparticles has been reported as a carrier of anticancerous drug, methotrexate (MTX) that has been intercalated into the LDH interlayer space by simple anion exchange technique. The insertion of the calcium ion, having larger ionic radius (114 pm) compared to…
Sodium potassium niobate (NKN) piezoceramics have been paid much attention as lead-free piezoelectric materials in high temperature devices because of their high Curie temperature. The temperature dependency of their material parameters, however, has not been determined in detail up to now. For this purpose, we exploi…
In this study, activity of some Schiff bases as aluminum corrosion inhibitor was investigated using artificial neural network (ANN). Hence, corrosion inhibition efficiency of Schiff bases (in any type) were gathered from different references. Then these molecules were drawn and optimized in Hyperchem software. Molecul…
We report on a simple and fast procedure to create arrays of atomically flat terraces on single crystal SrTiO3 (111) substrates and the deposition of ferroelectric BiFeO3 thin films on such single-terminated surfaces. A microwave-assisted hydrothermal method in deionized water and ammonia solution selectively removes…
Abstract The crystal structure of (4E)-2-amino-3-cyanobenzo[b]oxocin-6-one, denoted as 4(E)-ACBO, was analyzed using X-ray diffraction technique. The dielectric and AC electrical conductivity measurements of the bulk 4(E)-ACBO in the form of pellet were studied in the range of frequency 42 Hz to 5 MHz and the temperat…
ZnO nanocombs with 25 μm comb teeth were synthesized by chemical vapor deposition (CVD) method. Experiments were carried out to investigate the influence of carrier gas flow rate and temperature on ZnO comb teeth growth. The growth mechanism was demonstrated according to the morphology of prepared nanocombs under diff…
Summary Low molecular weight gelators bearing 2,2,6,6‐tetramethyl‐piperidine‐1‐oxyl (TEMPO) were synthesized and demonstrated to have reversible electrochemical redox properties. The gelation tests showed that the compounds have excellent gelation properties in γ‐butyrolactone and propylene carbonate. Atomic force mic…
A novel crosslinkable amino-functionalized conjugated polymer PFN-V is used as the cathode interlayer for high performance polymer solar cells, as reported by Lei Ying, Fei Huang, and co-workers in article number 1502563. The film can be rapidly crosslinked by UV-curing within 5 s in a nearly quantitative yield based…
In recent years there has been an increasing demand to recycle wastes produced by the agricultural and industrial processing. The aim of this paper is to investigate the suitability of date palm (Phoenix dactylifera) as lignocellulosic materials for the production of wood-cement composite boards, in addition to enhanc…
In this paper, an analytical solution describing the deflection of a cracked beam repaired with piezoelectric patch is introduced. The solution is derived using perturbation method. A novel analytical model to calculate the proper dimensions of piezoelectric patches used to repair cracked beams is also introduced. Thi…
In this present work, carboxymethyl cellulose (CMC) – ammonium chloride (NH4Cl) solid polymer electrolyte (SPE) films were prepared by solution casting method. The ionic conductivity and electrical properties of SPE films were investigated using Electrical Impedance Spectroscopy. SPE film containing 16 wt. % NH4Cl exh…
This paper provides an overview of the development and case studies from installations of On-line Partial Discharge (OLPD) Condition Monitoring (CM) systems for complete MV and HV networks in the Oil and Gas industry. The range and number of assets and geographical spread coupled with problems of restricted access and…
Silicone gels are gaining popularity as insulating materials in electrical applications, owing among others, to their good thermal stability, high elasticity, easy processing and good dielectric properties. In this paper results of dielectric strength measurements performed for a commercially available insulating RTV-…