Materials Literature
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Amorphous materials in the system , with or without the addition of , were synthesized by mechanical milling treatment of starting oxides in a dry atmosphere at room temperature. These materials, obtained as fine powders, worked as an anode for a lithium‐ion secondary battery using a conventional liquid electrolyte. T…
Raman spectra were measured for the full range of hole doping of the orthomanganites of the form ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ $(0<~x<~1)$ from ambient temperature to 75 K. Two high-frequency phonons that we assign to stretching modes of the oxygen atoms in the ${\mathrm{M…
The scanning reference electrode technique (SRET) has been used to study the influence of a range of anodic and cathodic corrosion inhibitors on patterns of localized corrosion occurring on the intact zinc surface of galvanized sheet steel. SRET spatially can resolve localized anodic and cathodic activity occurring ac…
The photocurrent measurements in combination with a modulation of the depletion region is a method which has the potentiality to determine the diffusion length profile in semiconductors directly. In this article the method is applied to strongly compensated (Au-doped) silicon. The expressions for signal description ar…
The highly branched ester rac-1 has been prepared. It exists in the form of a conglomerate (m.p. 90–92 °C) in which the two enantiomers are present in separate crystal lattices, as indicated by the melting point diagram. Both enantiomers of 1 have been isolated by crystallization [m.p. 112–114 °C, [α]D22 = +24.4 ± 0.7…
The paper presents the results of a study of kinetics of the recombination processes in crystals LiB3O5 (LBO) obtained by the use of time-resolved luminescence and optical absorption spectroscopy. It was revealed that the observed peculiarities of the recombination processes in LBO are due to a participation of the tr…
Highly oriented strontium barium niobate (SBN) thin films have been grown on MgO {100}substrates by pulsed laser deposition. The films have been characterised by X-ray diffraction (XRD), scanning electron microscopy and atomic force microscopy. XRD theta - 2 theta scans indicate that the single phase crystalline SBN l…
Abstract Preliminary investigations to study the feasibility of using polystyrene grafted with acrylic acid to blend polystyrene (PS) and nylon 6,6 (N66) have been done. The graft copolymer (PS‐g‐AA) was synthesized by reacting polystyrene with acrylic acid in the presence of a free radical initiator using the solid p…
Highly oriented strontium barium niobate (SBN) thin films have been grown on MgO{100} substrates by pulsed-laser deposition. The films have been characterized by X-ray diffraction (XRD), scanning electron microscopy and atomic force microscopy. XRD θ–2θ scans indicate single-phase crystalline SBN layers with the {100}…
This paper presents a new foaming technology using supercritical carbon dioxide as a blowing agent to obtain large volume expansion of biodegradable polyester foams of over forty-fold. The basic approach for the promotion of a large volume expansion ratio with carbon dioxide was to prevent cell coalescence by using a…
Abstract Fourier Transform Raman spectroscopy is employed to study the mechanism of reversion and the influence of the antireversion agent, 1,3 bis(citraconimidomethyl)benzene (BCI-MX) in squalene as well as in low molecular weight synthetic polyisoprene. The formation of non-sulfidic main chain modifications, such as…
A lamellar ABA triblock copolymer brought to equilibrium in the presence of a B-compatible solvent generally swells or transforms into an A-dispersed (cylindrical or micellar) morphology, depending on solvent content. If the A blocks of the copolymer are glassy, they serve as physical cross-links and stabilize a gel n…
Ytterbium–yttrium mixed oxides, which are potential emitter materials for thermophotovoltaic energy converters, were prepared using two different synthesis methods. The results of a characterization using Raman spectroscopy and x-ray powder diffraction (XRD) are presented. The purpose of this study was to confirm whet…
The structural parameters of needle punched nonwoven composites have been examined using image analysis system. Fourteen plies of carded webs of E Glass fiber were stacked and needle punched at different punching densities of 15, 30, 45, 60, and 90 penetrations per square centimeter. The needle punched webs were forme…
In the quest to improve the thermooxidative aging of the poly(vinyl chloride)/epoxidized natural rubber (PVC/ENR) blend, nitrile rubber (NBR) was incorporated into the blend to yield a ternary blend of PVC/ENR/NBR. A Brabender Plasticorder with a mixing attachment was used to perform the melt mixing at 150°C and 50 rp…
The Gibbs phase rule relates the number of degrees of freedom to the number of components and number of phases in a system at thermodynamic equilibrium. In determining the number of components, one must determine the number of independent reactions and the number of stoichiometric constraints. Textbooks focus on the p…
A design of experiments was employed to optimize the conditions of synthesis in order to electrogenerate thick polypyrrole films suitable for application as a cathode in polymeric batteries or supercapacitors. The influence of five main variables: potential of polymerization, generation time, monomer concentration, el…
Ferroelectric domain structures of epitaxial BaBi 4 Ti 4 O 15 (BBiT) thin films with different orientations have been imaged for the first time at the nanometer scale. Using the piezoresponse mode of scanning force microscopy it was demonstrated that the spontaneous polarization of BBiT has no component along the c -a…
We suggest that the 550-nm “yellow” emission in CdWO4 is due to Bi3+ ions substituting for Cd2+ ions. The absorption band corresponding to this emission has a peak near 350 nm. This yellow emission was only observed in crystals that contained bismuth impurities. Electron paramagnetic resonace has identified two new ce…
Critical flow intensities expressed in terms of critical wall shear stresses for initiation of flow induced localized corrosion (FILC) at carbon steel under CO{sub 2} corrosion conditions (1 M NaCl, 5 bar CO{sub 2}, 80 C) were evaluated using the submerged jet impingement method. Flow independent pitting facilitates F…