Materials Literature
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SynopsisThe results are presented of a quantitative study of the phosphoric acid anodizing of high purity aluminium. The effects of electrolyte concentration, temperature, anodizing time, current density and air agitation on the coating weight, metal loss, coating ratio and density of the anodic coating were investiga…
S. J. Gregg and R. K. Packer, J. Chem. Soc., 1954, 3887 DOI: 10.1039/JR9540003887
In order to explain the origin of the uniaxial ferromagnetic anisotropy induced by cold work or by magnetic annealing in cubic solid solutions, the anisotropy energy caused by an anisotropic distribution of solute atoms produced by cold work or magnetic annealing has been calculated using the same model as in Van Vlec…
Abstract New fiber‐forming polyamides containing heterocyclic groups were prepared form furan 2,5‐dipropionic acid and the corresponding tetrahydrofuran compound which were found to be prepared easily from furfural and levulinic acid. For example, poly‐decamethylenetetrahydrofuran 2,5‐dipropionamide (intrinsic viscosi…
Article The Crystal Structure of Stromeyerite, AgCuS: A Possible Defect Structure was published on December 1, 1954 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 106, issue 1-6).
S. M. Nelson and R. C. Pink, J. Chem. Soc., 1954, 4412 DOI: 10.1039/JR9540004412
A quantitative measurement of the current-density distribution over the surface of monocrystalline tungsten field emitters is obtained by densitometric analysis of calibrated photographic negatives of emission patterns observed with a modified Mueller projection tube. Analysis of distributions thus obtained permits an…
Lanthanum oxychloride can be activated to show strong fluorescence under excitation by cathode rays. Bismuth as an activator gives a blue emission extending into the ultraviolet with the peak at 3580 Å; antimony a greenish white with the peak at 4960 Å, and samarium a reddish orange emission composed of a series of li…
The oxide layer, giving the so‐called electron diffraction pattern and formed by heating copper in air at 600°C, has been examined by high‐resolution electron diffraction and electron microscopy. It is shown that the intensity anomalies which differentiate the pattern from the normal pattern are not due to impurities…
The rate of reaction of nitrogen with high‐purity zirconium was determined for the temperature range of 975° to 1640°C at 1 atm pressure. The reaction followed a parabolic law and the parabolic rate constant in (ml/cm 2 ) 2 /sec was calculated to be where 48,000 ± 1500 cal/mole is the activation energy for the reactio…
Aiming to obtain an interpretation of the cause for variance in behaviours between fish skin and terrestial animal hide, the relation between hydroxyproline content in the collagen and shrinkage temperatur (Ts) of different animal skins was determined. As a result, it has proved that there was a direct proportion betw…
J. M. Skinner, G. M. D. Stewart and J. C. Speakman, J. Chem. Soc., 1954, 180 DOI: 10.1039/JR9540000180
Les charges négatives d'un minéral argileux ne peuvent être neutralisées localement que par des cations monovalents. La saturation du minéral par des cations bi ou polyvalents crée nécessairement des défauts de neutralisation locale. On peut relier à cette circonstance la grande stabilité des états solvatés d'une argi…
Abstract Melting temperatures of cellulose trinitrate (13.96% N) in mixtures with γ‐butyrolactone have been determined dilatometrically, and also by an optical method depending on depolarization of polarized light when transmitted through a semicrystalline sample. Results obtained by these two methods, and also by dir…
High temperature x‐ray diffraction patterns and electrical resistivity measurements show that thorium of 99.8% purity transforms from face‐centered cubic to body‐centered cubic on heating to 1400 ± 25° C. At 1450° C the lattice constant of body‐centered cubic thorium is 4.11 ± 0.01 Å. The extrapolated lattice constant…
S. E. S. El Wakkad, A. M. S. El Din and J. A. El Sayed, J. Chem. Soc., 1954, 3103 DOI: 10.1039/JR9540003103
J. S. Dave and M. J. S. Dewar, J. Chem. Soc., 1954, 4616 DOI: 10.1039/JR9540004616
P. F. Clark, J. A. Elvidge and R. P. Linstead, J. Chem. Soc., 1954, 2490 DOI: 10.1039/JR9540002490
L. L. Bircumshaw, F. M. Tayler and D. H. Whiffen, J. Chem. Soc., 1954, 931 DOI: 10.1039/JR9540000931
ANODIC OXIDE FILMS ON TANTALUM ELECTRODES PART 1. THICKNESS AND CURRENT EFFICIENCY OF FORMATION ANODIC OXIDE FILMS ON TANTALUM ELECTRODES PART 1. THICKNESS AND CURRENT EFFICIENCY OF FORMATION BY L. YOUNG Metallurgy Division, A.E.R.E., and Dept. of Chemistry, Imperial College Received 7th September,