Materials Literature
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BiFeO3 ceramics were prepared by using the sol-gel technique with adding excess amount of bismuth. Different concentrations of excess bismuth were used to study the evolution of crystal structure and physical properties of BiFeO3. The phase purity and crystal structure of all samples have been studied by powder X-ray…
In this work, the thermal stabilities of a series of polyethylene glycols (PEG 4000, 6000 and 10000) were investigated after compositing with different kinds of inorganic salts, such as ammonium molybdate tetrahydrate (AMT), NH4VO3, (NH4)2SO4, NH4NO3, Na2SO4, Na2MoO4. It was first observed that all the ammonium salts…
Ytterbium doped TiO2 nano-particles were prepared via Sol-Gel Technique under varying conditions to investigate the effects of Ytterbium ion doping on the Titania optical properties in MID IR range. X-ray diffraction analyses show that prepared Yb3+ doped TiO2 samples have polycrystalline structure in Anatas phase. FT…
A method is described for the preparation of functional polybutadiene (PB) with hydroxyl groups along the polymer chain. This material can be used directly or as the starting substrate for further polymerization in both academic and industrial processes. We have developed a convenient method to obtain a polymer with a…
By reevaluating the experimental study of Zhang et al. (2005), here we demonstrate that the extent of grain growth, previously proposed to be solely driven by external stress, may have been significantly overestimated. A new physical mechanism, termed as free surface assisted stress‐driven grain growth (or self‐mechan…
We have prepared CaMoO4:Tb@Fe3O4 hybrid nanoparticles by co-precipitation and polyol method. Their temperature kinetics for hyperthermia temperature ∼43 °C under different applied AC fields and the luminescence properties under UV-radiation are investigated. A strong green emission is observed due to the presence of T…
A selective catalytic reduction process is generally used to treat NO(x); however, this approach results in the leakage of ammonia and requires expensive catalysts. In light of these issues, the specific objective of this study was to develop a new treatment method for a NO(x) gas stream with a Mg-Al oxide slurry. In…
The effect of thermal cycling on multistage martensitic transformation (MMT) in aged Ti–50.8 at% Ni alloy was investigated. The specimens were solution-treated at 1273 K for 3.6 ks and then aged at 773 K for 3.6 ks in vacuum without atmosphere regulation. Upon cooling, the aged specimens clearly showed quadruple-stage…
Highly selective nanoscale etching of a low-dielectric constant (low- k ) organosilicate (SiCOH) layer using a mask pattern of chemical-vapor-deposited (CVD) amorphous carbon layer (ACL) was carried out in CF 4 /C 4 F 8 /Ar dual-frequency superimposed capacitively-coupled plasmas. The etching characteristics of the Si…
A new ionic conjugated polymer with pentafluorobenzoyl moieties, poly(2-ethynyl-N-pentafluorobenzoylpyridinium chloride) [PEPBPC], was synthesized via the non-catalyst polymerization of 2-ethynylpyridine using pentafluorobenzoyl chloride. The polymerization proceeded well to provide a high yield of polymer. The chemic…
Ferroelectric glass-ceramics of the sodium-niobate-aluminum-silicate (NaO-Nb2O5-SiO2+Al2O3) system, with various amounts of ZrO2 added, were synthesized through melt casting followed by controlled crystallization. The crystallization behavior, microstructure, and dielectric performances of the glass-ceramics were inve…
An investigation was carried out to quantify and characterize the corrosion behavior of AZ61A magnesium alloy joints. Extruded 6-mm-thick Mg alloy plates of AZ61A grade were butt-welded using a solid-state, environmentally cleaner welding process, the friction stir welding process. The weld specimens underwent immersi…
Generalized replica exchange method (gREM) computer simulations are performed on model glass formers, polydisperse Lennard-Jones (LJ) systems at constant pressure, and discuss the effect of size polydispersity on the gas-liquid and liquid-crystal transitions, and on the liquid-glass crossover. At high temperatures in…
Dynamic light scattering (DLS) was performed on dilute suspensions of colloidal particles, where the scattering intensity was minimised by ellipsometric optics as in ellipsometric light scattering. Measurements at minimum intensity settings are dominated by the incoherent scattering properties, i.e. the deviations fro…
We present here a Density Functional Theory (DFT) study on the electronic structures and binding properties of chalcogenolate-bridged molecular wheels of ruthenium and osmium [M(ER)2(CO)2]n (M = Ru or Os, E = S or Se, R = alkyl or aryl group, and n = 6 or 8). Both the electronic structures and absorption properties of…
This paper considers a composite cylindrical structure, with low-enriched uranium (LEU) foil enclosed between two aluminum 6061-T6 cylinders. A recess is cut all around the outer circumference of the inner tube to accommodate the LEU foil of open-cross section. To obtain perfect contact at the interfaces of the foil a…
Pb-partitioning phenomenon was investigated in PbTiO3 nanopowders produced via sol-gel processing in order to achieve highly crystalline and single phase tetragonal perovskite PbTiO3 nanoparticles. The calcination conditions were selected based on the simultaneous thermal analysis of the PbTiO3 gels, including complet…
Ferroelectric relaxor behavior of Ba0.92-xCa0.08Ndx(Zr0.18Ti0.815Y0.0025Mn0.0025)O3 (x = 0, 0.5%, 1.0% and 2.0% mol) ceramics has been investigated. All the compositions have only tetragonal perovskite structure at room temperature. The dielectric peak constant of samples decrease and broaden, dielectric peak temperat…
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OBJECTIVES: To elucidate the predisposing factors and clinical characteristics related to the occurrence of stitch abscess after surgery in patients with oral squamous cell carcinoma (SCC). PATIENTS AND METHODS: The subjects were 232 patients who underwent excision and/or reconstruction and/or neck dissection for oral…