Materials Literature
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Abstract The electrical resistivity of peroxide and radiation crosslinked polyethylene/carbon black compounds was studied as a function of black concentration and, temperature in heating/cooling cycles. Different carbon blacks in compounds with polyethylene responded differently, regarding electrical resistivity, to t…
Abstract The title reaction was studied in a stirred‐flow reactor at six temperatures ranging from 228 to 297 K and for pressures near 2 torr. The experiments were performed under O‐atom‐rich conditions, and the HOONO 2 concentration was monitored with a modulated molecular‐beam mass spectrometer. O‐atom concentration…
Abstract Calcium carbonate (CaCO 3 ) was precipitated by equilibrating samples of calcareous soil and noncalcareous soil with a dilute sodium bicarbonate solution at two soil‐to‐solution ratios. Different degrees of supersaturation of the soil solutions prior to precipitation were thus achieved by releasing variable a…
Abstract A poly(vinyl chloride) (PVC) plastisol is a suspension of fine particles of PVC dispersion resin in a plasticizer. The particle size ranges typically from about 15 to 0.2 µm and smaller. The PVC particles in the plastisol consist of the primary particles, which are products of polymerization, and of the agglo…
One of the effects of heavy doping is that the dielectric constant varies with impurity density, and thus with position. The general form of Poisson’s equation is solved numerically for a Gaussian p-n junction using a model for ε(N) which is consistent with the experimental data reported by Castner. The results indica…
After a review of previous work, the authors show their results obtained in the study of the effect of pressure on the magnetization mechanisms of polycrystalline soft ferrites up to 1.5 kbar and in a temperature range from 263°K to 573°K. Three kinds of pressures were applied : hydrostatic pressure, lateral pressure…
Magnetocrystalline anisotropy and magnetostriction were measured for the single crystals of Fe-Si-Al alloys lying near the Sendust composition (85%Fe, 9.6%Si, 5.4%Al). The constants K1, λ100, λ111and λsare plotted in the concentration diagram of the Fe-Si-Al system. It was found that K1= 0 is realized in the region of…
Abstract not Available.
Abstract The partial vapor pressures of Mg(g) over the spinel solid solution system, MgO·nAl2O3(n=1.0, 2.0, and 2.8), have been measured by the mass-spectrometric Knudsen-cell method. In the temperature range from 1850 to 2300 K, the pressures are described by these equations: log[P(Mg,g)over 1.0-spinel/atm]=7.72±0.24…
Untersuchungen an vier ferritisch‐perlitischen Stählen unterschiedlicher chemischer Zusammensetzung und Korngröße sowie einem bainitischen Stahl mit Streckgrenzenwerten zwischen 200 und 630 N/mm 2 . Ermittlung deroberen und unteren Streckgrenze im Temperaturbereich zwischen 77 und 370 K bei Dehngeschwindigkeiten zwisc…
Recent researches on high silicon iron alloys in our laboratory are presented. In the field of 6.5%Si-Fe alloy sheet, the substitution of 1.5% aluminum for silicon improves the cold workability and retains the good magnetic properties of 6.5%Si-Fe sheet. By a splat cooling technique, XSi.YAl.(100-X-Y). Fe ribbons (4.0…
By heat-treating in the ridge region of the miscibility gap, the magnetic properties of the Fe-Cr-Co permanent magnet alloys have been remarkably enhanced. The optimum procedure of the heat treatments, such as thermomagnetic treatment and step-aging sequence for the "ridge" alloys, is examined. Such heat treatments ar…
Fine-grained sediments are those rocks, both hard and soft, carbonate and clastic, that have a dominant grain-size in the clay or silt grades (<63 μm). They are the most abundant sediments on the earth's surface and form between 50 and 750f the geological column. Classifications of fine-grained sediments have been…
Abstract Tervalent cobalt complexes of octaethylporphyrin (OEP) and tetraphenylporphyrin (TPP), [CoIII(OEP)(H2O)2]X (X=ClO4, BF4), [CoIII(OEP)(THF)2]ClO4, [CoIII(TPP)(H2O)2]X (X=ClO4), and [CoIII(TPP)(H2O)Y] (Y=Cl, Br, SCN, N3) were synthesized. Molecular weight measurements indicate that only [CoIII(TPP)(H2O)2]BF4 an…
Abstract The radiation crosslinking of poly(vinyl chloride), PVC, with trimethylolpropane trimethacrylate, TMPTMA, has been examined. The polyfunctional TMPTMA undergoes rapid polymerization incorporating the PVC into a three‐dimensional network. The kinetics and mechanism of these crosslinking reactions were studied…
In the most general case the orientation distribution of crystals in a polycrystalline sample is to be described by a function of orthogonal transformations which splits up into two functions of rotations corresponding to right- and left-handed crystals. The properties of these functions are influenced by crystal and…
This paper begins with a survey of amorphous magnetic alloy systems which are of interest for applications in electronics. Saturation, permeability, losses, shapes of the hysteresis loop, technological and elasto-magnetic properties are considered in comparison to crystalline alloys. The following applications are mai…
Because specialty fibers are expensive and are often blended with wool, there is a need to be able to distinguish between the two groups. Certain lustrous wools are even in diameter and have long scales like mohair, but there are visible differences in scale thickness and brightness. Cashmere and camel hair are fine a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetalloporphyrins with unusual geometries. 2. Slipped and skewed bimetallic structures, carbene and oxo complexes, and insertions into metal-porphyrin bondsKazuyuki Tatsumi and Roald HoffmannCite this: Inorg. Chem. 1981, 20, 11, 3771–3784Publication Date (Print):November 1,…
The deposition of zinc on Pb, Tl, Sn, and In has been investigated using cyclic voltammetry, potential pulse methods, x‐ray diffraction, and scanning electron microscopy. There is no evidence of underpotential deposition on any of the substrates and the nucleation overvoltage is 30–;40 mV. Thallium forms a surface all…