Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The temperature dependence of the fundamental absorption edge of SbSI is studied in the range 320 to 5 K. In the paraelectric phase the edge is described by the Urbach's rule. The pertinent parameters of the ferroelectric phase are found to be temperature dependent. The influence of spontaneous polarisation o…
The Zr-2.5 wt% Nb pressure tubes used in CANDU reactors are manufactured via hot extrusion, followed by cold-working. This manufacturing process causes the crystallographic structure of the alloy to be strongly textured and the grains to be elongated in the axial direction. The mechanical properties are consequently a…
The dependence of grain‐boundary resistivity and resistance per square centimeter of grain‐boundary surface on grain‐boundary density (D) in yttria‐stabilized zirconia was investigated using reported data. The grain‐boundary resistivity increased with increasing D in the high‐D region but was independent of D in the l…
SUMMARY The amounts and rates of release of the different categories of soil K were measured on 21 soils from field experiments in England, Wales and West Germany using a calcium saturated cation exchange resin. The soils contained various amounts of exchangeable, fixed and matrix K; some contained no fixed K at all.…
Abstract A single crystal of vivianite, Fe 3 (PO 4 ) 2 ·8H 2 O, has been investigated at room temperature using Raman spectroscopy. Using the site symmetry method, we have identified the internal modes of the PO 4 group. For the stretching modes we have observed: ν 1 ( A g )=950.5 cm −1 . ν 3 ( A g )=990.0 cm −1 , ν 3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPrediction of point efficiencies on sieve trays. 2. Multicomponent systemsHong Chan and James R. FairCite this: Ind. Eng. Chem. Process Des. Dev. 1984, 23, 4, 820–827Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 Oct…
By means of M\"ossbauer-effect spectroscopy, we study changes in the electronic structure of iron induced by substitutional impurity W atoms in a series of ${\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{W}}_{x}$ alloys containing up to about 9 at.% W. From the measured changes of the hyperfine (hf) fields and isomer shifts…
Abstract When reacted for periods of 5–10 min at temperatures of about 280–300°C in the presence of certain organic phosphites polymers that contain available carboxy and aliphatic amine groups undergo amidation. This reaction can increase the molecular weight of many aliphatic polyamides by their self‐reaction in an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlue gas denitrification. Selective catalytic oxidation of nitric oxide to nitrous oxideHans T. Karlsson and Harvey S. RosenbergCite this: Ind. Eng. Chem. Process Des. Dev. 1984, 23, 4, 808–814Publication Date (Print):October 1, 1984Publication History Published online1 May…
The macromolecular properties of 17 virgin commercial arterial prostheses and a series of explanted prostheses, both manufactured from poly(ethylene terephthalate) (PET) yarns, have been studied by gel permeation chromatography (GPC) and by differential scanning calorimetry (DSC). Only small differences were found bet…
A microstructurally based model of nonelastic deformation is proposed which is capable of predicting strain softening as well as a wide range of other deformation behaviors. The model, an extension of the MATMOD constitutive equations, now includes representations of both short range and long range internal stresses,…
Crystal structure parameters have been obtained for α-Al 2 O 3 , β -PbO 2 and (Mg, Fe) 2 SiO 4 by Rietveld analysis of Cu K α X-ray powder diffraction data collected on a conventional diffractometer using counting times ranging from 0.01 to 5 s per step. For all but the 0.01 s data collected on (Mg, Fe) 2 SiO 4 the st…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen-15 and cobalt-59 NMR study of the bent nitrosyl ligand in cobalt complexesJohn Bultitude, Leslie F. Larkworthy, Joan Mason, David C. Povey, and Barry SandellCite this: Inorg. Chem. 1984, 23, 22, 3629–3633Publication Date (Print):October 1, 1984Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonomeric and anion-bridged dimeric and polymeric oxamide oxime complexes of copper(II): preparation, crystal and molecular structures, and magnetic propertiesHelmut Endres, Dietrich Noethe, Elisabeth Rossato, and William E. HatfieldCite this: Inorg. Chem. 1984, 23, 22, 3467…
Abstract Chemical weathering taking place in a soil formed on till derived solely from dolerite was investigated. Initially, rock breakdown into smaller particles is by physical weathering. During this process, the ferromagnesian minerals weather chemically, releasing iron and magnesium which recrystallise to form iro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the mechanism of metal-catalyzed epoxidation: a model for the bonding in peroxo-metal complexesRobert D. Bach, Gregory J. Wolber, and Barry A. CoddensCite this: J. Am. Chem. Soc. 1984, 106, 20, 6098–6099Publication Date (Print):October 1, 1984Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution structure and properties of the [(2,2'-bipyridinyl-C3,N')bis(2,2'-bipyridine-N,N')iridium(III)](2+) hydrate ion, "pseudo-[Ir(bpy)3(OH)]2+"Paul S. Braterman, Graham A. Heath, Alan J. MacKenzie, Brian C. Noble, Robert D. Peacock, and Lesley J. YellowleesCite this: Ino…
Abstract Poly(ethylene terephthalate) (PET) fibers having a range of structure and morphology were prepared by heat‐setting commercial PET yarn at temperatures of 100–250°C for 5 min under two conditions, while the yarn was free to relax and when it was held taut at constant length. The crystallinity, crystallinity or…
Abstract Raman spectra have been obtained for solid iron phthalocyanine and a 10 −6 M solution of its tetrasulfonated derivative with Kr + laser excitation using the 6471 Å line. A normal coordinate analysis was carried out to determine assignments for the observed frequencies in terms of the various Raman active plan…
The single-crystal EPR spectra and the temperature dependence of the magnetic susceptibility of bis(hexafluor0- acetylacetonato)(4-hydroxy-2,2,6,6-tetramethylpiperidinyl-~-oxy)copper( 11) (Cu(hfac),(TEMPOL)) have been measured. The compound has a linear chain structure, with a TEMPOL ligand bridging two C ~ ( h f a cm…