Materials Literature
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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-…
Nowadays, most Photovoltaic installations are grid connected system. From distribution system point of view, the main point and concern related to PV grid-connected are overvoltage or overcurrent in the distribution network. This paper describes the simulation study which focuses on ferroresonance phenomenon of PV sys…
Abstract Objective: Caralluma tuberculata is a succulent plant that grows in some regions of Baluchestan province in Iran, and is widely used by natives as antidiabetic agent. This study evaluates the antidiabetic effects of aerial part suspension of Caralluma tuberculata (SCT) at two doses of 100 and 200 mg/kg and it…
Diborides, including zirconium diboride (ZrB 2 ) and titanium diboride (TiB 2 ), have a number of desirable ceramic qualities that make suitable for preparing ceramic-matrix composites. However, synthesizing a composite based on these materials usually requires high temperatures and complex synthetic methods. In the p…
Partial discharge (PD) detection is an effective method for finding insulation defects in HV and EHV power cables. PD apparent charge is typically expressed in picocoulombs (pC) when the calibration procedure defined in IEC 60270 is applied during off-line tests. During on-line PD detection, measured signals are usual…
In this study, polycaprolactone (PCL)-based polyurethane prepolymers (PCLPU) with different types of hard-segments were used as compatibilizers to prepare compatible starch-PCL composites in an intensive mixer. The effects of the hard-segments in the PCLPU compatibilizers on the structure and properties of the compati…
The redox properties of vanadium 5,15-bis( о -methoxyphenyl)-3,7,13,17-tetrabutyl-2,8,12,18-tetramethyl-5,10,15,20-tetraphenylporphyrinates in the reaction with an organic peroxide, specifically dicumyl peroxide, were studied. The kinetic parameters of the reaction were determined and its possible mechanism was sugges…
The successive elimination of Н2 from a NaBH4 molecule surrounded by a few (up to eight) water molecules has been modeled in the framework of the cluster approach with the use of the 6-31G* basis set and hybrid density functional (B3LYP). Computations show that the elimination of the hydrogen molecule from the NaBH4 ·…
Functionalization is critical for improving mechanical properties of carbon nanotubes (CNTs)/polymer nanocomposites. A fundamental understanding of the role of the CNT/polymer interface and bonding structure is key to improving functionalization procedures for higher mechanical performance. In this study, we investiga…
We report the successful synthesis and characterization of a new layered diluted magnetic semiconductor (DMS) La(Zn,Mn,Cu)AsO which is isostructural to Fe-based "1111" superconductor. Mn and Cu are codoped into the same Zn sites to provide local moments and carriers, respectively. A ferromagnetic transition with the h…
Polypropylene (PP) is a kind of semi‐crystalline polymer so it is hard to foam with supercritical carbon dioxide (SCCO2). We used polypropylene block (PP‐B) copolymer as a modifier to improve the crystallization behaviors and foaming performance of polypropylene homo polymer (HPP). HPP, PP‐B, and a series of HPP/PP‐B…
The influence of the nanocrystalline state of Fe and Fe 75 Si 25 particles and their electrical resistance on the microwave properties of composite materials that contain these particles has been investigated experimentally. The main factors that determine changes in the frequency dispersion of the permeability are th…
Polyhydroxybutyrate (PHB) films with highly porous structures were synthesized using a one phase system comprising of metal chloride/methanol/PHB/chloroform (MCl 2 /CH 3 OH/PHB/CHCl 3 ). SEM analyses confirmed that the MCl 2 (where M = Cu 2+ or Ni 2+ ) induced porous structures with pore sizes ranging from 0.3 - 2.0 μ…
Abstract: Charge Contrast Imaging (CCI) is a low-vacuum scanning electron microscope (LV-SEM) technique that can be induced through partial surface charge suppression of uncoated nonconductive samples, imaged with a suitable detector such as a gaseous secondary electron detector (GSED). The technique commonly produces…
A facile strategy has been developed to synthesize double-shelled Zn(OH)2 nanoflowers (DNFs) at room temperature. The nanoflowers were generated via conversion of Cu2 O nanoparticles (NPs) using ZnCl2 and Na2 S2 O3 by a simple process. Outward diffusion of the Cu(2+) , produced by an oxidation process on the surface o…
This paper reports the structural and optoelectronics properties of prepared pure and Sb-doped ZnO nanoparticles using the co-sputtering technique. The phase purity and crystallite size of synthesized ZnO and Sb-doped nano-sized particles were characterized and examined using X-ray diffraction and scanning electron mi…
This comprehensive study declares experimentally the effects of IA/IIA metal carbonates on the formation of hexagonal boron nitride (hBN) with the aid of the available experimental methods as regards Fourier transform infrared spectroscopy (FT‐IR), powder X‐ray diffraction (XRD), scanning electron microscopy (SEM) and…
This work deals with a useful PID control scheme to impose a user defined temperature gradient on a Thermoelectric heater used as heat source for Thermoelectric Generators characterization. These devices used in both power supply and cooler/heater configurations are one of the most promising to provide electricity and…