Materials Literature
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Magnetization processes and structure changes in helical and modified helical spin arrangements due to application of a magnetic field are studied for finite temperatures and absolute zero in a number of cases of different anisotropy energy. In the case of a strong anisotropy giving rise to a propser helical structure…
The internal morphology of isothermally bulk-crystallized fractions, and of whole polymer, Marlex 50 polyethylene is revealed by fracture experiments. Three distinctly different types of lamellae are then observable if one uses suitable electron microscopic techniques: (1) regular or type I lamellae which are similar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of Ethylenediaminetetraacetato Complexes. II. The Structure of Crystalline Rb[Fe(OH2)Y].H2O. III. The Structure of Crystalline Li[Fe(OH2)Y.2H2OM. D. Lind, M. J. Hamor, T. A. Hamor, and J. L. HoardCite this: Inorg. Chem. 1964, 3, 1, 34–43Publication Date (Prin…
Equations for the apparent heat capacity in the glass-transition interval as functions of temperature, heating rate, and thermal history have been developed and programmed for computation. The hole theory of liquids was used as basis for the analysis of the glass transition. Experimental information was derived from d…
Radio noise due to corona discharges on suspension insulators is studied as influenced by atmospheric humidity, insulator-surface pollution and harmonic contents in the alternating-voltage wave applied across the insulator. The radio-noise level is also measured under direct-voltage conditions. The tests are carried o…
The fundamental parts of the nautiloid shell are (1) conch, (2) septa, (3) connecting ring, (4) siphonal deposits, and (5) cameral deposits. It is important to recognize that the septal neck and connecting ring, ordinarily considered the two hard parts of the siphuncle universally developed, are discrete structures. C…
A sample of soil taken from the field will contain mineral particles of very different sizes. There may be sizeable stones in it which have to be removed in order to obtain a homogeneous sample on which to conduct soil investigations. This is unfortunate because the field behaviour of a soil may be markedly affected b…
J. J. Gilman, Discuss. Faraday Soc., 1964, 38, 123 DOI: 10.1039/DF9643800123
Electrical signals induced in semiconductor devices by a high-resolution scanning electron beam have been used to determine the boundaries of doped (p or n) regions, even when these boundaries lie beneath passivating oxide layers, or beneath evaporated metal leads. The uniformity of planar junctions lying beneath the…
The reactions between boron and phosphorus to form the boron phosphides are described. The elements were compacted into pellets and dropped into a preheated reaction zone. The reaction between zinc phosphide and boron also resulted in the formation of the boron phosphides and the complete removal of zinc in the vapor…
The examination of yarns containing one coloured filament enables the behaviour of individual filaments within twisted continuous-filament yarns to be studied. By this means it is possible to correlate the radial position at any one point in a yarn with that at all subsequent points. This has been done for a series of…
The course of isothermal crystallization of a series of high molecular weight polyethylene oxide copolymers was studied with a microdensity balance. The comonomers, butylene and styrene oxides, ranged from 0.2 to 4 mole%; several examples of different polymerization conditions were also studied. The consequence of add…
The anodic dissolution of gold in alkaline cyanide solutions has been studied by potentiostatic and galvanostatic techniques under high‐purity conditions. Measurements were made at room temperature and in the p H range 11–13, the concentration varying from 0.05 to 0.50%. The results show that gold has three current ma…
The experimental work leading to the development of Zircaloys -1, -2, -3, and -4 is reviewed. The corrosion properties of Zircaloys -2 and -4 in high temperature water and steam, and the effects of composition, heat treatment, and water chemistry upon oxide film formation and hydrogen absorption during corrosion are a…
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Among 22 compounds examined for photoluminescence, only , and the metaniobates of Mg Ca, Zn, and Cd show appreciable room temperature emission. With the exception of , all of these have the columbite structure; moreover, the only essentially nonluminescent columbite‐type compound noted was . The absorption edges of th…
Zone‐refined iron corrodes at the same rate whether cold‐worked or annealed. Cold‐working of iron containing 0.007–0.15% carbon increases the corrosion rate in 0.12 N HCl ( p H = 1.01 ) , the rate increasing still more after heat treating the iron at 77°–100°C for 2 hr. Cold‐working of iron containing 0.01–0.02% nitro…
The infrared spectra of solid crystalline films of ammonium nitrate were measured at temperatures ranging between the melting point (169 °C) and liquid air temperature (−190 °C). Four different spectra were obtained which are shown to belong to phase I, II, IV, and (very probably) VII. Phases III and V were not encoun…
Abstract Some experiments were carried out to prove the validity of the assumption of a simple series model for the calculation of the elastic modulus of crystalline regions in oriented linear polymers from X‐ray determination of lattice extension. Various specimens such as filaments, fibers, and films were prepared f…
The first page of this article is displayed as the abstract.