Materials Literature
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A new method is proposed for the determination of energies of activation of oxidation of metals and alloys. Metals are oxidized under conditions of linearly increasing temperature, and the activation energy may be determined from one single oxidation run. In addition the method also gives the approximate temperature r…
Vapor phase reduction of boron trichloride with hydrogen on electrically heated filaments in flow systems was investigated as a potential method for the preparation of high‐purity boron. Experiments were conducted on laboratory and bench‐scale flow reactors. Conversion efficiency was a function of mole ratio of reacta…
All single crystals of MgO which have been available contain iron-group impurities in quantities easily detectable by e.s.r. absorption. For a given impurity, the fractions in the di- and tri-valent states depend in part upon the past heat treatment and upon the concentrations of the other impurities. Energetic radiat…
Abstract not Available.
D. R. Rosseinsky, Trans. Faraday Soc., 1958, 54, 116 DOI: 10.1039/TF9585400116
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolysoaps. II. The Preparation of Vinyl Soaps1HAROLD H. FREEDMAN, J. PHILIP MASON, and A. I. MEDALIACite this: J. Org. Chem. 1958, 23, 1, 76–82Publication Date (Print):January 1, 1958Publication History Published online1 May 2002Published inissue 1 January 1958https://pubs.a…
Two Aerobee rockets were employed to eject relatively large amounts of sodium vapor into the earth's atmosphere. One of the flights occurred during evening twilight and sodium was placed in the sunlit atmosphere from 75 to 110 km. Sodium D-line emission (λ 5890 A) was observed in the ejected trail above 90 km, and 589…
J. Scanlan and W. F. Watson, Trans. Faraday Soc., 1958, 54, 740 DOI: 10.1039/TF9585400740
M. F. C. Ladd and W. H. Lee, Trans. Faraday Soc., 1958, 54, 34 DOI: 10.1039/TF9585400034
S. Ahrland, J. Chatt, N. R. Davies and A. A. Williams, J. Chem. Soc., 1958, 264 DOI: 10.1039/JR9580000264
Abstract Pressure differences between foam bubbles of unequal size are the cause of gas transfer from small to larger bubbles. The rate at which the small bubbles decrease in size is calculated as a function of the radius of the bubbles, the surface tension of the liquid and the thickness and permeability of the liqui…
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Phase relationships in the system were determined in air in the range between and , using solid state and quenching methods. Three congruently melting compounds exist, , , and . The orthophosphate has a sluggish, reversible inversion at 942° and melts at 1060°±8°C. The pyrophosphate undergoes a rapid, reversible inver…
Abstract Intrinsic viscosities of cellulose acetates of degrees of substitution 2.86 and 3.00 and of cellulose trinitrate have been investigated as functions of temperature, solvent, and molecular weight. Large negative temperature coefficients ( ca. −0.6% per degree) of [η] appear to be characteristic of cellulosic c…
The first page of this article is displayed as the abstract.
An investigation was started on the solid solubility range of oxygen in alpha -zirconium. The solubility limit for samples heat-treated at 8O0 C was found to be about ZrO/sub 0.40. After annealing at 800 C, the sample ZrO/sub 0.30 gives x-ray powder photographs which show the oxygen atoms to be distributed at random i…
By the use of a feedback amplifier technique, the voltage appearing across a search coil wound on a ferromagnetic core can be made to follow any desired driving waveform, and the inherent harmonic distortion effects arising from non-linear B/H characteristics are reduced by an amount approximating to the loop gain. Th…
The paper describes an extensive investigation into the design of transformers with the aid of a high-speed digital computer. A general programme has been developed covering a range of transformers from 30 to 210 MVA, and has been tested for a wide range of designs within these limits. The subdivision of the process o…
A review of the periodical literature on the subject of impact and the coefficient of restitution ε shows that it depends not only on the materials (elastic moduli) of the colliding objects, but also on (1) their relative normal velocity at the instant of impact, (2) their shapes and sizes, (3) their masses, and (4) t…
Abstract Density data for a silica‐filled dimethylpolysiloxane rubber define incipient crystallization conditions and indicate the forms of crystalline growth for the unstressed rubber and for a sample at 200% elongation. Temperature—tension data for the same silicafilled rubber show incipient crystallinity temperatur…