Materials Literature
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Helium, deuterium, and neon permeability, diffusivity, and solubility have been measured for CGW-7740 glass. The results indicate that gas migration occurs primarily through the silica-rich phase. Reaction of deuterium with the glass structure is evident at temperatures exceeding 300°C. The activation energy associate…
An improved band structure of Pd calculated by the empirical pseudopotential method is used to compute the density of states and the reflectivity, R( omega ). The reflectivity of Pd with dipole matrix elements calculated by the actual wave functions is given for 0<or=h(cross) omega <or=10eV and is compared with measur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of Infinite-Dilution Activity Coefficients for Predicting Azeotrope Formation at Constant Temperature and Partial Miscibility in Binary Liquid MixturesVincenzo BrandaniCite this: Ind. Eng. Chem. Fundamen. 1974, 13, 2, 154–156Publication Date (Print):May 1, 1974Publicatio…
Various types of insulators have been energized with ±250 kV dc voltage and exposed to natural conditions by the seaside continuously. Salt deposit density and flashover phenomenon of these insulators have been investigated extensively for about two years. According to the results obtained so far, the influence of dc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExistence of associated species in lanthanum (III) chloride-potassium chloride meltsVictor E. Maroni, Ellen J. Hathaway, and G. N. PapatheodorouCite this: J. Phys. Chem. 1974, 78, 11, 1134–1135Publication Date (Print):May 1, 1974Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of di-.mu.-chlorobis[dichloro(guaninium)copper(II)] dihydrate. Second determinationRobert F. Drake, Van H. Crawford, Nancy W. Laney, and William E. HatfieldCite this: Inorg. Chem. 1974, 13, 5, 1246–1249Publication Date (Print):May 1, 1974Publication Histo…
Synthetic crystals of silver iodide are shown to form polytypes other than the previously reported wurtzite-type β-AgI and sphalerite-type γ-AgI. Four new polytypes have been discovered and their layer sequences determined by X-ray diffraction. The constant of proportionality between percentage hexagonality and birefr…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation S. M. Curry, A. L. Schawlow; Measuring the Diameter of a Hair by Diffraction. Am. J. Phys. 1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence quenching of dicyanobis(1,10-phenanthroline)ruthenium(II) by cupric ion in aqueous solutions. Dynamic and static processesJ. N. Demas and J. W. AddingtonCite this: J. Am. Chem. Soc. 1974, 96, 11, 3663–3664Publication Date (Print):May 1, 1974Publication History P…
The optical constants of Se and CdTe have been measured in the far ir from 10 cm(-1) to 100 cm(-1) using Fourier transform spectroscopy. An oscillator model has been fit to the available data for both materials over the entire ir range from 10 cm(-1) to 10,000 cm(-1). Several three-phonon absorption peaks have been ob…
In this paper an experimental study is reported of the pure bending and recovering properties of wool plain-knitted fabrics for bending in the two principal directions of the fabric. The mechanisms of fabric bending were found to be relatively complex and were studied from both a geometrical and rheological point of v…
The exact solution for diffraction by a perfectly conducting quarter plane has been previously determined. This solution is general and needs some simplification before it can become a useful tool for diffraction studies. A tractable approximation to be used in the "Geometrical theory of diffraction" is being sought.…
Analytical methods for the study of orthogonal-flux systems and parallel-flux systems are presented. The analyses are applied to study and compare orthogonal-flux and parallel-flux controllable inductors. It is found that the two systems have a great qualitative similarity but differ in the magnitudes of similar effec…
Abstract The polymeric hydrogen form of phthalocyanine is found to be more conductive than the metallic derivatives, in contrast to the behavior of the monomers. In addition, the polymers were found to be much more conductive than the corresponding monomers with the resistivity of the polymers ranging from 7 ohm‐cm to…
The static and dynamic properties which characterize the structural phase transitions in NaNb${\mathrm{O}}_{3}$ have been widely investigated by transient NMR measurements of the ${\mathrm{Na}}^{23}$ and ${\mathrm{Nb}}^{93}$ nuclei in a powdered sample (no large-enough single crystal was available). The temperature ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of 1,2-dithiosquarate salts and x-ray crystal structure of potassium bis(dithiosquarato)nickelate(II)D. Coucouvanis, F. J. Hollander, R. West, and D. EggerdingCite this: J. Am. Chem. Soc. 1974, 96, 9, 3006–3008Publication Date (Print):May 1, 1974Publication History…
Theoretical counterparts are presented for the experimental efficiency curves obtained by Hutley and Bird in the visible region for a holographic grating covered consecutively with films of silver, aluminium and gold. It is thus shown that the recently developed formulation of Maystre, which takes into account the fin…
The strain-hardening of α-brasses is examined in terms of the condition for the generation of a new slip band at the head of a pile-up of dislocations against a grain boundary. The flow stress of high-zinc brasses appears to be determined by this condition, but the development of intragranular dislocation cells eventu…
This paper reports results obtained through computer simulation of the thermally activated glide of an idealized dislocation through a random array of point obstacles. The array size is fixed at 999, and the dislocation-obstacle interaction is taken to have a simple step form. The variables governing glide are then th…
Abstract Studies were conducted in the greenhouse and in the field to evaluate several phosphate rocks for flooded rice ( Oryza sativa L.). A close relationship was found to exist between first‐crop yield response to applied P and citrate solubility in a series of phosphate rocks representing the theoretical range in…