Materials Literature
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The negative charging process and its mechanism caused by low-energy electron beam (e-beam) irradiation have been clarified for an insulating thin film with a grounded conductive substrate. Numerical simulation is performed by considering both electron scattering and electron transport, in combination with the Monte C…
LaFe 1- y Co y AsO 1- x F x ( x =0.11) with various y values were prepared and their electrical resistivities, superconducting diamagnetisms and Hall coefficients have been measured. 75 As- and 135 La-NMR studies have also been carried out In spite of the successful Co-doping, we have not found any meaningful correlat…
In this paper a chemical method applied to synthesize exfoliated graphite (EG) is presented. In this method graphite intercalation compound (GIC) was firstly synthesized by chemical treatment of graphite flakes using a mixture of sulfuric and nitric acids followed by thermal shock of GIC at 1000°C to produce EG. The b…
In direct current (DC) power cable the electric field is affected by conductivity of the material, which is a function of both temperature and electric field. Loading in high voltage direct current (HVDC) cable results in a temperature gradient across the insulation and hence a radial distribution of the insulation co…
Electrical conductivity and oxygen nonstoichiometry (delta) have been measured, respectively, by a dc 4-probe technique and coulometric titrometry on the system of polycrystalline Ti0.99Ga0.01O1.995-delta against oxygen activity in the range of -20 < log aO2 < or = 0 at different temperatures in the range of 1073 < or…
Surface topography and surface chemistry can influence cell adhesion. This study evaluated how the combined effect of topography and chemistry can reduce cell spreading and proliferation. Silica nanoparticulate coatings ranging from 7, 14 and 21 nm in diameter were manufactured on glass substrates and chemically modif…
Correct finite-element method (FEM) computations of end-winding leakage inductances of MVA-range machines are discussed. This is shown through validations against total stator reactance measurements of 11 air-suspended stators and a reasonable agreement of FEM computations with the International Electrotechnical Commi…
We established a technique for constructing PEGylated gold nanoparticles (GNP) that have small compounds with almost complete functionalities on their surfaces using a newly synthesized hetero-telechelic poly(ethylene glycol) (PEG), and their association/dissociation behavior on an antibody-immobilized surface was eva…
Superhydrophobic surfaces, associated with the so-called Lotus effect, have attracted numerous studies in the past few years, originally motivated by their unique non-wetting properties and resulting applications (water-repellency, self-cleaning surfaces, etc.). It was soon recognized, however, that beyond their stati…
Equal channel angular pressing (ECAP) is so far the most viable severe plastic deformation procedure to extrude material by using specially designed channel dies without any substantial changes in geometry and to prepare an ultrafine grained material. Magnesium is the lightest of all structural metallic materials, but…
As copper concentrates are progressively becoming more complex and low in grades, it is meaningful to remove sulfur from complex copper concentrates for smelting them by a carbon reduction process. In the present work, a kinetic study on the oxidative roasting of complex copper concentrate was experimentally investiga…
An FEM algorithm was developed to determine the viscoelastic properties of soft tissues of agar/agar-gelatin gels based on the curve-averaged data from stress relaxation experiment of parallel plate compression and FEM optimization technique. This approach enabled more realistic and pertinent expression of the mechani…
Formation of foulants on food equipment surfaces causes reduction in the heat transfer as well as increase in the pressure drop across plate heat exchangers. Minimizing fouling is hence imperative to achieve better return on investment as well as to improve food quality. A plate heat exchanger (PHE) system operated in…
La1 − x Ba x FeO3 − δ (x = 0–1) perovskites were prepared by the mechanical activation of mixtures of binary oxides in a centrifugal planetary ball mill for 3 min followed by calcination at 1100°C for 4 h, and their phase composition was determined by X-ray diffraction. All samples up to x = 0.8 are single-phase oxide…
As reported in very researches, the majority failure mechanism in cable terminations is predominantly involving partial discharge deterioration caused by voids, contaminants and protrusion. The partial discharge measurement is an effective way to detect such defects. However, no research shows the relation between the…
Zeolite encapsulated nanocrystalline CuO is synthesized and characterized by powder XRD and HRTEM analyses which clearly show that the particles are less than 15 nm and the nanoparticles are highly dispersed. This nano CuO encapsulated CuY zeolite is used as catalyst in the oxidation of aromatic secondary alcohols. Cu…
We have demonstrated that patterned Cu-multiwalled carbon nanotube (MWCNT) composite emitters can be fabricated using a unique electrodeposition technique including a photolithography process. Well-regulated, patterned Cu-MWCNT composite emitters in diameter were formed on the conductive substrates. The MWCNTs were fi…
The peel performance of two aircraft fuel tank sealants was comprehensively investigated by means of a modified peel specimen previously developed. Experiments were carried out at five different peel angles in the range from 90 to 180° using seven sealant layer thicknesses in the range from 0.1 to 5 mm. The effect of…
Three generations of water-soluble flavin dendrons have been synthesized and the role dendrimer generation has on the physical and catalytic properties of these assemblies has been investigated.
The measurement of high-pressure signals is often hampered by cavitation activity. The usage of a fiber optic probe hydrophone possesses advantages over other hydrophones, yet when measuring in a cavitating liquid large variations in the signal amplitude are found; in particular when the pressure signal recovers back…