Materials Literature
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Purpose To make easier and faster the designing of transformers using scale models. Design/methodology/approach The scale modeling in designing of transformers is included. Both computer and physical models of high leakage reactance (HLR) and 3-phase (TP3C) transformers have been considered. The 3D field computations…
Purpose To develop a homogenization technique to directly and efficiently take the eddy current effects in laminated magnetic cores within time domain finite element (FE) analyses. Design/methodology/approach The technique is developed for being used within a 3D magnetodynamic b ‐conform FE formulation, e.g. using a m…
Single-phase of was synthesized by citric-gel processing and photoluminescence (PL) properties in the range of were investigated. The bands below with maxima at approximately in excitation spectra were assigned to the host lattice absorption, the bands above with a maximum at about 235 and in and , respectively, corre…
Abstract Although metamaterials and so-called left-handed media have originated from theoretical considerations, it is only by their practical fabrication and the measurement of their properties that they have gained credibility and can fulfil the potential of their predicted properties. In this review we consider som…
It is demonstrated that icosahedral carbon nanoparticles in which the local environment of carbon atoms is virtually identical to the local environmental of carbon atoms in a diamond can be formed in the nanosize range. The general principle that governs the formation of structures of icosahedral diamond-like nanopart…
Symmetrical dialkyl trithiocarbonates were obtained from various alkyl halides with an equivalent of carbon disulfide and cesium carbonate in polar aprotic solvents, although the conventional synthesis of trithiocarbonates had required large excess amount of carbon disulfide. This reaction proceeds under ambient condi…
This paper deals with the dynamic modeling of a hydrogen production system using gPROMS. The model includes mass balances, liquid-gas equilibrium relations, mass transfer laws and kinetic reaction equations. The initial reaction mixture is a sodium borohydride solution that reacts via a self-hydrolysis mechanism in th…
In addition to the conventional measurements of partial discharges (PD) recommended in IEC 60270, currently non-conventional PD detection methods are increasingly used, such as the electrical PD detection in the HF / VHF / UHF range as well as the employment of acoustic, optical and chemical procedures. All these meth…
The dimensional stability of wood and its resistance to decay and fire can be improved by depositing inorganic materials in the wood matrix and forming wood-inorganic composites. In this paper, four novel wood-inorganic (aluminum) composites were developed. The composites are referred to according to the oxy-aluminum…
Nanocrystalline ceria powders have been synthesized by combustion technique using citric acid as a fuel and nitrate as an oxidizer. The auto-ignition of the gels containing cerium nitrate and citric acid resulted in ceria powders. A theory based on adiabatic flame temperature for different citric acid-to-cerium nitrat…
By measurements of the contact angle with water(W),glycerol(G),formamide(F), diiodomethane(D) and ethylene glycol(E) on polypropylene(PP),polyethylene(PE),polyvinyl chloride(PVC),polystyrene(PS),poly(ethylene terephthalate) (PET),acrylonitrile-butadiene-styrene(ABS) and polycarbonate(PC),the Lifshitz-van der Waals and…
A theoretical and experimental study was conducted to investigate the critical condition at which a liquid drop slides down on an inclined plate. When the drop starts to slide down, it is suggested that the advancing and receding contact angle may appear on the circumference of the contact area of drop on the plate. T…
The reduction of environmental burdens is required in recent years to mitigate global warming, ozone layer depletion and etc. in manufacturing fields. Hence, prediction system of environmental burden for machining operation has been developed so far. Hence, the evaluation indicator for eco-efficiency of process and op…
We investigated the uniformity of content, rheological properties and chemical stability for prescription of Kindavate® ointment diluted with white petrolatum. When the ointment was levigated with white petrolatum (Propeto® for dilution) by a pharmacist or mixed by an autorotation/orbital mechanical mixer, a uniform o…
Semi-metal tanning systems have gained importance in recent times as an alternative for chrome tanning. Many reports are available regarding vegetable-aluminum combination tanning systems, but the mechanism of interaction between the aluminum and the vegetable tanning molecules has not been elucidated in detail. This…
Sputtered-deposited nickel titanium thin films are commonly amorphous when synthesized and require annealing to crystallize them. The resulting microstructures, which are governed by nucleation and growth kinetics, dictate the actuation properties. The evolution of these microstructures was studied using in situ trans…
Digital photography is used to follow corrosion-driven delamination at 95% relative humidity when NaCl contacts an artificial coating defect on carbon steel loaded with an emeraldine salt (ES) of polyaniline (PAni) base layer and polyacrylate overlayer. Changes in the optical properties of the PAni layer reveal delami…
Aseries of aqueous anionic polyurethane dispersions with ionic groups in the soft segments were synthesized from a polyether glycol, maleic anhydride modified castor oil, isophorone diisocyanate, and α,α-dimethylol propionic acid according to the prepolymer mixing process. Samples were neutralized by the addition of t…
Nanometallic iron and aluminium, along with hydrogen and electricity, are among the proposed alternatives to the petroleum-based fuels for future transportation. The advantages of the metallic fuels appear to be high volumetric energy densities and zero greenhouse gas emissions during the operation of the vehicle. How…
It is well known that the electric and thermal conductivities of materials depend largely on their crystal orientation. Meanwhile, the imposition of a high magnetic field is a very effective method of obtaining highly crystal-aligned structures. Recently, thermoelectric materials, that is, materials which can directly…