Materials Literature
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A compilation of the S—O symmetric and asymmetric stretching frequencies is given for a large number of compounds containing an —SO 2 — group. It is shown that a linear relationship between [Formula: see text] is valid for a large number of sulphuryl and polysulphuryl compounds and that the actual frequencies depend i…
ABS>The solubility of oxygen in alpha -zirconium in the temperature region, 400-800 deg C, was investigated by x-ray methods. The solubility, which is independent of temperature, is 28.6 at.% (ZrO/sub 0.4//sub 0/). With increasing oxygen content, the length of the c axis increases over the entire solubility range whil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInstability Constants of Complex Compounds.F. BasoloCite this: J. Am. Chem. Soc. 1961, 83, 2, 507Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 January 1961https://pubs.acs.org/doi/10.1021/ja01463a075https://doi.org/…
The diffusion of helium through the walls of high-purity fused quartz hollow cylinders was studied using a mass spectrometer as a detecting device. By surrounding the outside of the hollow cylinder with helium and observing it diffuse through into the mass spectrometer, permeation rates and diffusion coefficients were…
J. H. Welch and W. Gutt, J. Chem. Soc., 1961, 4442 DOI: 10.1039/JR9610004442
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTESTERIFICATION OF THE SURFACE OF AMORPHOUS SILICAC. C. Ballard, E. C. Broge, R. K. Iler, D. S. St. John, and J. R. McWhorterCite this: J. Phys. Chem. 1961, 65, 1, 20–25Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 J…
Many aspects of the history of natural glasses are related to the physicochemical properties of silicate melts. Glasses are thermodynamically unstable; with time and under a variety of conditions, they become crystalline. When little water is present, devitrification may be described in much the same terms as those wh…
D. A. S. Ravens and I. M. Ward, Trans. Faraday Soc., 1961, 57, 150 DOI: 10.1039/TF9615700150
A brief review is given of possible ways to increase corrosion resistance of titanium in acids proceeding from analysis of its electrochemical characteristics and passive state stability. Rational ways of alloying titanium for acid resistance are indicated. Experiments include titanium alloys with palladium, chromium,…
Abstract not Available.
The powder diffractogram of vanadium dioxide crystals was found to change, rapidly and reversibly, at about 70 deg C, the most obvious feature being the disappearance of all reflections hkl with h odd. At 180 deg C the effect was even greater and the crystal structure was derived and found to be essentially of the rut…
B. J. Hathaway, D. G. Holah and J. D. Postlethwaite, J. Chem. Soc., 1961, 3215 DOI: 10.1039/JR9610003215
The kinetics of collagen reprecipitation from solutions of salt-extracted calf dermis in the presence of small amounts of mucopolysaccharide and nucleic acids (0.005 per cent in the final reaction mixture) has been reported by Wood (1960). The present paper is a parallel study using the same materials, and describes t…
On employing a sectioning technique with Cr 51 as the tracer, the diffusion of Cr ions in nitrogen‐equilibrated was determined from 1045° to 1550°C. Volume diffusion coefficients in hot‐pressed compacts of three different impurity levels conform to the expression . Additions of and do not cause a significant change. U…
Values of the elastic constants of single crystals of the bcc transition elements V, Nb, and Ta, are reported at T=27°C. They are, in units of 1011 d/cm2: c11c12c44V22.811.94.26Nb24.613.42.87Ta26.716.18.25Comparisons are made of the values obtained for two crystals each of V and Ta. A high-frequency cw resonance techn…
The cation distributions in copper ferrite-chromite series and the copper ferrite quenched from high temperatures are measured by X-ray diffraction method. The lattice parameters are also measured as a function of chromium ion content and of temperature. The critical fractions of copper ions on 16d and 8a sites for th…
Abstract A simple procedure for the determination of the crystalline fraction in isotactic polypropylene, suitable for routine work, is described. It gives lower figures for the crystalline fraction than the method recommended by N ATTA , C ORRADINI , and C ESARI in 1957. The correctness of the results (within the lim…
Polymerization and the Characterization of Polymers.Preparation, Fabrication, and Characterization of Polymers.Advanced Processing.Polyamides, Ureas, Urethanes, and Other Amide--Linked Polymers.Polyesters, Polycarbonates, and Polyurethanes.High Temperature and High Performance Polymers.Solid Phase Polymerization.Ring-…
Tracer diffusion mechanism in a polycrystalline medium with a plane source is discussed by assuming both the high diffusivity along the grain boundaries as compared with that inside the grains and the conservation of diffusant. The following theoretical results are obtained from the analytical solution of the problem.…
Abstract not Available.