Materials Literature
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Lithium ferrite materials with different concentrations of Bi 2 O 3 and V 2 O 5 additives are prepared by the conventional ceramic technique. The x-ray diffraction analysis proves that the additives do not affect the final crystal phase of the lithium ferrite in our testing range. Both Bi 2 O 3 and V 2 O 5 additives c…
By using finite element method (FEM), nanofibers' deposition behavior including the orientation and alignment of nanofibers that are approaching to fiber collectors was simulated and systematically investigated in term of the effects of electrostatic field. Based on the simulation results, we have experimentally demon…
For the excellent characters such as lightweight, high ratio-strength, high rigidity and reuse, magnesium alloy is used widely in vehicle lightweight redesign. Selecting AM60B as material, the process of magnesium alloy material substitution redesign for wheels of electric bicycle is advanced. The structure of aluminu…
Despite numerous attempts to explain the phenomenon of transport and magnetoresistance in manganites based on Jahn–Teller phonon coupling and double exchange mechanisms, satisfactory results could not be reached. The small polaron transport mechanism, based on the valence exchange arising from Madelung energy, is show…
Rheological properties of highly concentrated oil-in-water (O/W) emulsions (HCEs), formed by mixing palm-based nonionic surfactant, C12E6 (HLB = 11.7, CMC = 25μM), water and olive oil volume fraction ≥78vol% were investigated. Samples with lower oil volume fraction (<85%) and surfactant concentration (<8%) exhibited p…
This contribution is focused on the application of laboratory dielectric losses measurements to the insulation of service aged oil-impregnated HV power cables. The goal is to investigate the dependence between the electrical and temperature stresses to impregnated paper insulation at different aging stages. By means o…
The scarcity of ore and environmental intensity of copper production creates a strong incentive to explore alternative materials for conducting electricity. Single-walled carbon nanotubes (SWCNT) rely on plentiful feedstock materials (i.e., graphite) and exhibit high theoretical conductivity on a per mass basis. Howev…
The FIND algorithm is a fast algorithm designed to calculate entries of the inverse of a sparse matrix. Such calculation is critical in many applications, e.g., quantum transport in nano-devices. For a 2D device discretized as N × N mesh, the best known algorithms have a running time of O(N4), whereas FIND only requir…
The challenge of high quality SEM imaging of defects at the bottom of dense and high aspect ratio structures is addressed here. We present a method that leverages the natural voltage contrast developed along dense topographies, by amplifying the information from the bottom of dense structures, using a secondary electr…
Phase change RAM (PCRAM) is one of the best candidates for the next-generation nonvolatile memory. Recently lateral PCRAM using a thin phase change bridge was proposed as a promising approach to achieve high density due to simpler fabrication process and lower RESET current. This paper proposes a new lateral PCRAM str…
The effect of accumulation of the tert -butyl groups in the phenyl rings of tetraphenylporphine on the complex formation rate of tetra(3,5-di- tert -butylphenyl)porphine ( I ) with copper(II), zinc(II), and cadmium(II) acetates in acetic acid and in a mixed ethanol-benzene solvent was studied by the chemical kinetics…
Purpose The purpose of this paper is to describe two new thick film paste systems (one glass‐based and the other polymer‐based) for insulating aluminium substrates and allowing components like high‐intensity light‐emitting diodes to be attached to a conductor deposited on the dielectric. Design/methodology/approach Co…
This study describes synthesis of FeCo nanoparticles by using a method which couples electrodeposition of metals with the employment of high power ultrasound. A 20 kH titanium alloy horn ultrasound generator, a &#x201C;sonoelectrode&#x201D;, generated short current pulses which were triggered and followed by u…
We report an experimental investigation by electron paramagnetic resonance of the doublet of lines split by ∼1.3 mT and centered on the E′γ center resonance line in the spectrum of irradiated amorphous SiO2. Commercial and sol-gel materials, some of which subjected to hydrogen-deuterium exchange, were investigated. Ex…
Zn ( 1 − x ) Mg x O alloys have been grown by using metal-organic vapor phase epitaxy (MOVPE) technique on ZnO substrates at 800°C. The photoluminescence spectroscopy was used to determine the alloy composition. Mg solid compositions up to 20% have been obtained by MOVPE, depending on the relative Mg∕Zn pressure ratio…
Concrete panels are usually used to provide protection against incidental dynamic loadings such as the impact of a steel projectile. In this paper finite element technique is used to investigate the dynamic behavior and failure conditions of reinforced concrete panels subjected to the projectile impacts. Finite elemen…
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Recent advances in glass shell production from the pyrolysis of silicon-doped glow discharge polymers have led to the new ability to manufacture glass shells with germanium dopant in the wall. Comparison of the strength and helium permeability properties of these glass shells relative to their pure silicon dioxide cou…
Partial discharges (PD) diagnostics play an important role in insulation diagnosis of HV power cables all over the world. By application of such diagnostic it is possible to asses the quality of final product (cable) during factory test, during after-laying test or during service life. In this way knowledge about the…
Modern industry has frequently employed ethylene glycol ethers as monomers in plasma polymerization process to produce different types of coatings. In this work we used a stainless steel plasma reactor to grow thin polymeric films from low pressure RF excited plasma of diethylene glycol dimethyl ether. Plasmas were ge…