Materials Literature
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The structural, electronic and optical properties of two principal representatives of spinel oxides CdGa2O4 and CdIn2O4 have been investigated using the full-potential augmented plane-wave plus local orbitals method within density functional theory. We used the generalized gradient approximation (GGA) for the exchange…
For dental orthodontic applications, NiTi wires are used under bending conditions in the oral environment for a long period. The purpose of this study was to investigate the effect of bending stress on the corrosion of NiTi wires using potentiodynamic and potentiostatic tests in artificial saliva. The results indicate…
The goals of this study were first to prepare and second to test albumin-based beads containing maghemite nanoparticles dispersed on them. Incorporation of maghemite nanoparticles in the albumin-based template, allowing full control of the magnetic content, was accomplished by adding ionic magnetic fluid to the albumi…
Synergy study is of great importance to optimize the two-stage plasma-facilitated catalysis system and also necessary to gain a mechanistic understanding of the overall reaction process. In this paper, the effects of the long-lived chemical products of plasma pretreatment on the subsequent selective catalytic reductio…
To lower the insulation specifications (specifically, the lightning impulse withstand voltage) of oil-immersed transformers and thus reduce equipment cost while maintaining high insulation reliability, it is important to identify the insulation characteristics under non-standard lightning impulse waveforms that are as…
O uso de ardósia em construções tem frequentemente resultado na produção de uma grande quantidade de resíduos particulados que tem pequeno valor mercadológico e grande potencial de danificação do meio ambiente. Neste trabalho, partículas de ardósia foram testadas como agente de reforço em polipropileno. Polipropileno…
Recently, dendrimers are attracting much attention for their development as biomedical nano-devices. In the present paper, we introduce dendrimer photosensitizers, composed of a focal photosensitizing unit surrounded by poly(benzyl ether) dendritic wedges, for photodynamic therapy (PDT). Ionic dendritic porphyrins (DP…
Measuring partial discharge (PD) activity in high voltage plant is a well established technique use to monitor insulation integrity. A partial discharge is a surge of electrons within a dielectric normally caused by insulation degradation or overstressing. This movement of electrons creates electromagnetic radiation.…
Abstract It was found that the corrosion rate of steel in the sea mud with sulfate‐reducing bacteria (SRB) could be as high as 10 times of that in the sea mud without SRB. And the hydrogen permeation reaction would occur when metals were corroded. So it is necessary to investigate the effect of living SRB on hydrogen…
Partial discharge characteristics in air under a low vacuum region were studied to develop a diagnosis technique to determine the gas pressure in a vacuum interrupter. The pressures were set at from 1.3 Pa to 2.6 kPa in order to simulate the leakage of gas into the vacuum interrupter. The structure of the vacuum inter…
We report a simplified single emulsion (oil-in-water) solvent evaporation protocol to synthesize surface functionalized biocompatible magnetic nanospheres by using highly concentrated hydrophobic magnetite (gel) and a mixture of poly(D,L lactide-co-glycolide) (PLGA) and poly(lactic acid-block-polyethylene glycol-malei…
Cobalt ferrite CoFe2O4crystalline nanoparticles (50-100 nm) were produced by carbon combustion synthesis of oxides (CCSO). In this combustion synthesis process, the exothermic oxidation of carbon generates a thermal reaction wave that propagates through the solid reactants mixture of CoO and Fe2O3converting it to coba…
The present experimental work is aimed at studying the effect of different loading rates on the mechanical behavior of jute/glass reinforced epoxy hybrid composites. Surface modification was done in order to get better interfacial bonding between jute and resin. The hybrid composite showed insensitive behavior at high…
Compositions near the morphotropic phase boundary (MPB) of the BiScO 3 –Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 ternary system showed high‐temperature relaxor properties (1 kHz) of T max ∼250°C and a permittivity maximum of ∼16 000. Transmission electron microscopy (TEM) was used to investigate the nature of the microstructure…
We describe the solubilization/dispersion of as-produced and purified single-walled carbon nanotubes (raw-SWNTs and p-SWNTs) with protoporphyrin IX derivatives and tetraphenylporphyrin iron(III) chloride, the spectral behavior of the octaalkylporphyrins-solubilized shortened-SWNTs (s-SWNTs), and the electrochemistry o…
A dual-cathode arc plasma source was combined with a computer-controlled bias amplifier to synchronize substrate bias with the pulsed production of plasma. In this way, bias can be applied in a material-selective way. The principle has been applied to the synthesis of metal-doped diamondlike carbon films, where the bi…
The Ba0.5Sr0.5Co0.2Fe0.8O3 (BSCF) cathode material was synthesized and evaluated for cathode in low temperature solid oxide fuel cells (LTSOFCs). Using Ni as anode, Sm0.2Ce0.8O2(SDC)-carbonate composites as electrolyte and the BSCF as cathode to construct the fuel cell (LTSOFC), maximum power output of 860 mW/cm2 has…
Sympathetic inrush current phenomenon occurs when a transformer is switched on in a power system network containing other transformers which are already energized. In this paper, the phenomenon of sympathetic inrush current is investigated using nonlinear-transient field-circuit coupled finite element formulation. The…
With the development of power electronic techniques, pulse-width modulated (PWM) inverters are widely used to control electrical machines, to feed transformers and to interface renewable energy systems. There are abundant high frequency harmonics in the output voltage of a PWM inverter, which increase the iron loss an…
Four homologous series of orthoconic (45 degree tilt) antiferroelectric liquid crystals, containing either a terphenyl or fluorosubstituted terphenyl core as mesogenic unit, have been synthesized and their mesomorphic behaviour investigated by the DSC and polarized light microscopy were discussed. X-ray diffraction st…