Materials Literature
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This paper presents an improvement of the procedure to determine the parameters of the simplified model for metal-oxide surge arresters, derived from the IEEE standard model. The main innovation introduced by the paper lays in the possibility to define an approximate dynamic model even if data about residual voltages…
Abstract Four new thioantimonate(III) compounds with the general formula [ TM (tren)]Sb 4 S 7 , TM = Mn 1 , Fe 2 , Co 3 and Zn 4 , were synthesized under solvothermal conditions by reacting elemental TM , Sb and S in an aqueous solution of tren ( tren = tris(2‐aminoethyl)amine). All compounds crystallize in the monocl…
A number of alloys, including stainless steels, aluminum, and nickel-based alloys, are used in seawater for various applications. The localized corrosion of these materials is affected, among other factors, by temperature, microbial activity, chlorination, and flow rate. A predictive model, based on the calculation of…
We have investigated the adsorption and lubrication properties of a series of poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) (PEO−PPO−PEO) block copolymers (“Pluronic”) to examine the feasibility of using them as aqueous lubricant additives. The adsorption behavior of PEO−PPO−PEO onto poly(dimethylsil…
Fibers/fabrics coated with conductive polymers exhibit sensing capacities for external stimuli like strain, temperature, relative humidity, etc. In this paper, we present our recent investigation of the sensing behavior and mechanical analysis of polymer fibers coated with an intrinsically conductive polymer, i.e., po…
Abstract An error analysis for numerically evaluating random uncertainties in x‐ray photoelectron spectroscopy has been implemented in version 2003 of the spectra treatment and analysis software UNIFIT in order to improve the understanding of the statistical basis and the reliability of the model parameters for photoe…
This paper clarifies the operating principles of a controllable reactor of transformer type (CRT). In nature, a CRT is equivalent to a multi-winding transformer for which the low-voltage windings (control windings) operate at short-circuited states in turn. This kind of reactor possesses such advantages as smooth powe…
Abstract Low‐dielectric‐constant (low‐κ) materials are a critical requirement for future generations of computer microprocessors. As a unique class of porous silicas, pure silica zeolites (PSZs) have been shown to be a promising low‐κ material with excellent mechanical strength (e.g., elastic modulus of 16–18 GPa) due…
Photo-optic materials offer the possibility of light controlled photonic devices, intelligent and environmentally adaptive optical materials. One strategy for creating these materials is the combination of structure formation through holographic photopolymerization and the variable optical properties of liquid crystal…
The temperature-dependent complex shear modulus G * of an amorphous, 300 nm thick Zr 65 Al 7.5 Cu 27.5 film is measured using a double-paddle oscillator as a substrate, oscillating in its torsional eigenmode at about 5440 Hz. At high temperatures, the loss modulus is dominated by viscous flow that leads to an α-relaxa…
Abstract The compound [K(18‐crown‐6)] 8 [Ge 9 =Ge 9 =Ge 9 =Ge 9 ] ˙ 8en ( 1 ) featuring a [Ge 9 =Ge 9 =Ge 9 =Ge 9 ] 8‐ cluster anion was synthesized from K 4 Ge 9 for the first time. The X‐ray single crystal analysis shows that, in many respects such as bond connection and packing style, compound 1 is quite different…
In search of a candidate EBC material for silicon nitride ceramics, water vapor corrosion test was performed for a series of monolithic materials such as Al 2 O 3 , TiO 2 , ZrO 2 , HfO 2 , Al 2 TiO 5 , Al 6 Si 2 O 13 , Lu 4 Hf 3 O 12 , Ln 2 Si 2 O 7 (Ln = Yb and Er) and mullite/Lu 2 Si 2 O 7 eutectic bulk at above 130…
The linear interaction energy (LIE) method is combined with energy minimization and finite-difference Poisson calculation of electrostatic solvation for the estimation of the absolute free energy of binding. A predictive accuracy of about 1.0 kcal/mol is obtained for 13 and 29 inhibitors of beta-secretase (BACE) and H…
The surface charge distribution under impulse voltage is measured using a static capacitance probe. A probe with very small charge leakage is designed. The condition of surface charge accumulation under impulse voltage is analyzed, and it is concluded that micro discharges in the gas near the insulator surface such as…
We have carried out a magnetophotoluminescence excitation spectroscopy study on micelle-suspended single-walled carbon nanotubes in high magnetic fields. By analyzing field-dependent spectral changes, we determined the degree of magnetic alignment of the observed semiconducting nanotubes at 45 T. This, together with a…
The origin of the variety of body colors exhibited by South Sea Pearls is in part due to a newly recognized structure of the nacre, the edge-band structure, which gives rise to interference colors characteristic of its width. With the pearl oyster, Pinctada maxima, the colors include a range of silver tones, creams, y…
The techniques of X-ray diffraction (XRD), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were employed to investigate dispersion and structural characteristics of V 2 O 5 /CeO 2 −MO 2 (M = Si 4+, Ti 4+, and Zr 4+ ) catalysts calcined at different temperatures from 773 to 1073 K. The CeO 2 −MO 2 (…
Abstract Mechanical properties and deformation mechanisms of polypropylene (PP)/wood fiber (WFb) composites modified with maleated polypropylene as compatibilizer and styrene‐butadiene rubber (SBR) as impact modifier have been studied. The addition of maleated polypropylene to the unmodified polypropylene/wood fiber c…
Abstract The mainstream magnetic iron oxide particles used as contrast media for magnetic resonance (MR) imaging are composed of a magnetic iron oxide core surrounded by a dextran or carboxydextran coat. The core size ranges from 2 nm to less than 10 nm, and the hydrodynamic diameter ranges from 20 nm to about 120 nm.…
Abstract A simple and effective method is described for the fabrication of robust zeolitic membranes with three‐dimensional (3D) interconnected macroporous structures. The membranes were prepared by electrostatically seeding mesoporous silica sphere (MSS) self‐assembled films with silicalite‐1 nanoparticles, followed…