Materials Literature
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Several chromophores with donor–acceptor properties and containing a carboxylic or sulfonic group [coumarin-3-carboxylic acid (3-CCA), 9-anthracenecarboxylic acid (9-ACA), 4-benzoylbenzoic acid (4-BBA) and 2-naphthalenesulfonic acid (2-NSA)] have been intercalated into Mg–Al hydrotalcite-like compounds, both via anion…
Abstract By using reverse emulsion templating, siliceous hollow spheres with ultra large mesopore wall structures (∼50 nm in pore diameter, ∼200 nm in wall thickness) have been synthesized with a high surface area (674 m2/g) and pore volume (1.25 cm3/g).
Abstract A short‐range force constant model was applied for the first time to investigate the phonons in RFeO 3 ( R = Tb , Dy, Ho, Er, Tm) perovskites in the orthorhombic phase. The calculations with the 12 stretching and three bending force constants provide good agreement for the observed Raman and infrared wavenumb…
We consider Casal's strain gradient elasticity with two material lengths $\ell,{\ell}'$ associated with volumetric and surface energies, respectively. For a Mode III finite crack we formulate a hypersingular integrodifferential equation for the crack slope supplemented with the natural crack-tip conditions. The full-f…
Total surface free energy, γS TOT, for several solids (glass, PMMA, duralumin, steel and cadmium) was calculated from the surface free energy components: apolar Lifshitz–van der Waals, γS LW, and acid–base electron–donor, γS -, and electron–acceptor, γS +. Using van Oss and coworkers' approach (Lifshitz–van der Waals/…
The scanning Kelvin probe is used to study the influence of trivalent cerium cations ( Ce 3 + ) on the kinetics and mechanism of corrosion-driven delamination processes affecting polyvinyl butyral (PVB) coatings adherent to the intact zinc surface of hot dip galvanized steel. Placing aerated aqueous sodium chloride on…
ABSTRACT: Tensile strength (TS), elongation (E), water vapor permeabilities (WVP) and solubilities were determined for highly carboxymethylated starch (HCMS)‐based edible films plasticized with sorbitol (S), xylitol (X), mannitol (M) and glycerol (G). TS and E of HCMS‐based film increased as the concentration of plast…
A technique is proposed to effectively and efficiently compensate for secondary current of current transformers, particularly in the presence of remanent flux. The technique first utilises the wavelet transform to accurately distinguish the distorted section from the healthy section of a secondary current waveform. Se…
Acetan is a water-soluble polysaccharide produced by a bacterial cellulose (BC) producer, Acetobacter xylinum. An acetan-nonproducing mutant, EP1, was generated from wild-type A. xylinum BPR2001 by the disruption of aceA, which may act to catalyze the first step of the acetan biosynthetic pathway in this bacterium. EP…
Abstract The formation of molecular films of 2,9,16,23-tetraamino metal phthalocyanines [TAM(II)Pc; M (II) = Co, Cu, and TAM(III)Pc; M = Fe] by spontaneous adsorption on gold and silver surfaces is described. The properties of these films have been investigated by cyclic voltammetry, impedance, and FT-Raman spectrosco…
The corrosion of stainless steel under anodic conditions in salt solutions was strongly suppressed by an ultrathin layer of polyelectrolyte complex, applied using the layer-by-layer deposition method. Voltammetric scans over a wide potential region, as well as constant potential measurements in the metastable pitting…
Molybdenum disulfide, MoS2, nanoparticles can be synthesized either at high temperature as mono- and polycrystalline materials or at low temperature using various (electro)chemical routes. In the work presented, MoS2 nanoparticles were obtained using a low temperature (140 °C) method via a chemical solution reaction r…
The oxygen reduction reaction (ORR) was examined on copper, platinum, and glassy carbon electrodes, with regard to its inhibition by exposure of the electrode to chromate ion in NaCl solution. All three electrode materials exhibited a mass transport limited current for the ORR at sufficiently negative potentials, but…
Abstract Coalescence in polymer blends was modeled by combining population dynamics with three coalescence theories: Smoluchowski, trajectory, and film drainage. Modeling results are compared with our previous coalescence experiments on polystyrene/high density polyethylene blends. Comparison of the Smoluchowski theor…
Research Article| January 01, 2002 The Crystal Chemistry of Beryllium Frank C. Hawthorne; Frank C. Hawthorne Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2, frank_hawthorne@umanitoba.ca Search for other works by this author on: GSW Google Scholar Danielle M.C. Huminicki D…
This paper describes experimental results of a magnetic refrigerator operated at room temperature. Spheres of Gadolinium, 2.2 kg in weight and 0.3 mm in diameter, are used as a magnetic working material. The magnetic materials were divided into two vessels and reciprocated between high and zero magnetic fields. High m…
Description Twenty-seven peer-reviewed papers give you the latest research in thermal engineering. Topics cover: Materials—vacuum panel insulations, a new category of high performance products, are used wherever high thermal resistance is desired in confined space applications, such as transportation, equipment, and a…
Fourier transform infrared microspectroscopy has been used to provide a better understanding of filiform corrosion processes on coated aluminum alloys. Results from scanning Kelvin probe microanalysis are also presented. The investigations were performed on untreated or chromium-free pretreated AA6016 covered with an…
Pulse discharge sintering (PDS) technique was employed to synthesize the ternary compound Ti3SiC2 from four starting powder mixtures. The experimental results demonstrated that when the starting material of 3Ti/Si/2C or 3Ti/SiC/C was used high content of the secondary phase, TiC, higher than 30 mass%, was found in the…
A supported lanthanum gallate (LSGM) electrolyte thin-film solid oxide fuel cell with Ni-YSZ cermet anode and strontium-doped lanthanum manganite (LSM)-yttria stabilized zirconia (YSZ) composite cathode was, for the first time, fabricated and tested. The cell was prepared by an unconventional approach, in which an LSG…