Materials Literature
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Structural refinements of Sn-rich and Sn-poor colusite from the Lorano marble quarry, Italy, revealed that the crystals are isometric and belong to space group P43n. For Sn-rich colusite, CuS. and (As,Sn)S. tetrahedra are connected through comer sharing in a sphalerite structure with the composition CU26Sn2As,S32' and…
A detailed numerical investigation of anomalies in lossy metallic lamellar gratings is presented in a large interval of a wavelength-to-period λ/d ratio. A substantial increase in absorption (a decrease in the total diffracted energy) is observed. If λ/d is small enough (within the homogenized limit), the absorption c…
Abstract : In July 1980, the Department of Defense Explosives Safety Board (DDESB) Explosive Safety Standard DOD 6055.9-STD became linked with or referenced to the 1966 Kingery Hemispherical TNT Surface Burst airblast compilation. In 1984, a revised Kingery compilation was released. The 1984 Kingery paper presented th…
X‐ray photoelectron spectroscopy was used to study a lead‐based relaxor dielectric ceramic to identify the grain‐boundary phase most likely to be responsible for the insulation degradation of relaxor dielectric ceramics under humid loading conditions. The grain‐boundary phase consisted mainly of lead and oxygen. The b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDevelopment of Novel Functionalized Aryl Cyanate Ester Oligomers. 1. Synthesis and Thermal Characterization of the MonomersAdam Chaplin, Ian Hamerton, Brendan J. Howlin, and John M. BartonCite this: Macromolecules 1994, 27, 18, 4927–4935Publication Date (Print):August 1, 199…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotocrosslinking of Poly(4-hydroxystyrene) via Electrophilic Aromatic Substitution: Use of Polyfunctional Benzylic Alcohols in the Design of Chemically Amplified Resist Materials with Tunable SensitivitiesS. Ming Lee, Jean M. J. Frechet, and C. Grant WillsonCite this: Macro…
The penetration of cathodic protection potentials under disbonded pipeline coatings has been studied. A physical model based on laboratory data has been developed. In neutral-pH, low-conductivity trapped water, effective protection potentials were found to penetrate less than 10 cm (4 in.) into a simulated disbondment…
The low energy X-ray response of Ge detectors with amorphous Ge entrance contacts has been evaluated. The spectral background due to near contact incomplete charge collection was found to consist of two components: a low level component which is insensitive to applied voltage and a high level step-like component which…
A multi-layer a-Si:H based thermal neutron detector was designed, fabricated and simulated by Monte Carlo method. The detector consists of two a-Si:H pin detectors prepared by plasma enhanced chemical vapor deposition (PECVD) and interfaced with coated layers of Gd, as a thermal neutron converter. Simulation results i…
Abstract A stable 8.4 Å hydrate of kaolinite was prepared by exchanging ethylene glycol for water in the 10.8 Å intercalate of ethylene glycol in kaolinite. The hydrate of kaolinite was characterized by XRD, FTIR and TGA/DSC. From the TGA data, one can estimate that there is 0.60 water molecule per Al 2 Si 2 O 5 (OH)…
Mechanisms of the deposition of carbon thin films by the laser ablation of graphite were investigated by monitoring the plasma emission. Parameters such as electron density, ionization temperature, and vibrational temperature during plasma growth were evaluated as a function of the laser power density and the surround…
Many features of the structural, magnetochemical, spectral, electrochemical, and chemical behavior of transition metal complexes with redox-active dioxolene ligands indicate that most of them are valence-localized species with well defined and experimentally distinguishable metal- and dioxolene-oxidation states. The v…
Compositional dependence of spontaneous emission probabilities of Er 3+ was studied for silicate, borate, and phosphate glasses using the Judd–Ofelt theory. Through all of the glass systems, spontaneous emission probabilities of the 4 I 13/2 → 4 I 15/29 → 4 I 9/2 → 4 I J , and 4 S 3/2 → 4 I J ( J = 9/2, 11/2,13/2,15/2…
Abstract Impact modification was studied for a variety of engineering thermoplastics to determine if notched Izod data obtained at various temperatures and modifier concentrations could be correlated with particle size or surface‐to‐surface interparticle distance of the modifier. Elastomers evaluated were characterist…
Hydrogen embrittlement (HE) of two high-strength, low-alloy steels was studied in conditions typical of the marine environment. Double-cantilever beam specimens, heat-treated to produce the microstructure in the heat-affected zone of a weld, were tested in seawater containing sulfate-reducing bacteria (SRB) at a range…
The first part of this paper discusses the molecular design of selected examples of structural units containing taper-shaped exo-receptors and various crown ether, oligooxyethylenic, and H-bonding-based endo-receptors, which self-assemble into cylindrical channel-like architectures via principles resembling those of t…
The high intensity of an X-ray synchrotron source in combination with a curved position-sensitive detector covering 120° (CPS120 by INEL) has been used to collect complete powder diffraction patterns, suitable for Rietveld analyses, within minutes. From consecutive patterns (ΔT ≃ 5 K), detailed information was obtaine…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of the Swelling and Drying Kinetics of Thin Gelatin Gel Films by in situ InterferometryChi Wu and Chui-Ying YanCite this: Macromolecules 1994, 27, 16, 4516–4520Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 Au…
Abstract The reaction of potassium calcium tris(dithiooxalato)chromate(III) hexahydrate KCa[Cr(dto)3]·6H2O, a metal(II) salt and a tetrapropylammonium bromide (NPr4Br) in aqueous methanol forms bimetallic assemblies {NPr4[MCr(dto)3]}x (M = Fe (1), Co (2), Ni (3), Zn (4)), where the dto group bridges Cr(III) and M(II)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Polymorphic Modification of Tetrathiafulvalene. Crystal Structure, Lattice Energy and Intermolecular InteractionsArkady Ellern, Joel Bernstein, James Y. Becker, Sharona Zamir, Leah Shahal, and Shmuel CohenCite this: Chem. Mater. 1994, 6, 8, 1378–1385Publication Date (P…