Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of Discrete Eight-Coördination. I. Basic AnalysisJ. L. Hoard and J. V. SilvertonCite this: Inorg. Chem. 1963, 2, 2, 235–242Publication Date (Print):April 1, 1963Publication History Published online1 May 2002Published inissue 1 April 1963https://pubs.acs.org/d…
A systematic unified review is given of the basic statistical theory of the multiple scattering of fast charged particles in the small-angle range. The approximation considered is that of the Snyder-Scott-Moliere theory, and only slight attention is given to the less accurate Gaussian approximation. The single-scatter…
Abstract This paper reports measurements and theory concerning stationary, resonant single bubbles which have been formed in a vertically vibrating liquid column at frequencies of 40–1050 c./s. With liquids of high viscosity (ca. 10 poise) the bubbles can be made large enough to occupy the entire cross‐section of the…
Silicon single crystals are grown by the Czochralski method with a variety of growth rates and rotation rates. Segregation coefficients of impurities are found to depend on the growth conditions as is expected by the existing theory. Diffusion coefficients of impurities in silicon melt are determined for B, Al, Ga, In…
Aqueous solutions of lead salts (1, 2) and saturated
Black phosphorus undergoes two reversible structural transitions at high pressures. The first is to a structure of the type arsenic A7. This structure is transformed to a simple cubic structure at higher pressures. The reversibility between the A7 and simple cubic structures at 111 kilobars indicates that the transiti…
Calcite-aragonite equilibrium, determined with an oscillating Griggs-Kennedy squeezer over the range 100 degrees to 575 degrees C, is given by P = 5500 (+/- 500) + 12.6 (+/- 1.5) T where pressure is in bars and temperature is in degrees Celsius. Our new determination agrees with earlier high-temperature work but is si…
A method is described which complements present techniques and enables measurements to be made of the secondary electron emission coefficient, $\ensuremath{\gamma}$, for ions on materials for which $\ensuremath{\gamma}$ is difficult or impossible to measure by the "flashing" or heating technique. The method allows ope…
A high temperature furnace with a sharp temperature gradient has been designed and constructed. A maximum temperature gradient of 2550°F/in. was obtained. The versatility of this design may permit many uses in materials research. Its capability of growing a silicon-iron single crystal was demonstrated.
MANY workers have shown the effectiveness of oiling eggs in maintaining albumen quality and reducing the weight loss. Recently interest has centred upon the various methods of applying the oil and the best time at which it should be applied (Schwall et al., 1961; and Goodwin et al., 1962). Mueller (1958) showed that t…
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 John S. Humphreys, Charles J. Martin; Determination of Transient Thermal Stresses in a Slab with…
The Debye temperature of α-iron at 298°K has been determined from Geiger-counter measurements of the Bragg intensities from a polycrystalline sample (using Mo Kα) and theoretical atomic scattering factors. The value obtained (⪹D = 398 ± 9°K) is somewhat less than the average value (418 ± 4°K) calculated from all the a…
Studies of the fabrication of uranium oxide fuel pellets by the low‐temperature sintering of nonstoichiometric oxide are described. Completer reversion to stoichiometric UO 2 in the sintered pellets was attained by two methods: (1) Sintering in a nitrogen atmosphere which contained a small amount of hydrogen and (2) s…
Abstract Some of the properties of carbon blacks in rubber are ascribed to its “structure”. This paper presents results on the sinusoidal dynamic straining of rubber/carbon black vulcanizates over an amplitude range including strains less than 0.1% and suggests that an elucidation of structure effects and the nature o…
The $\ensuremath{\alpha}\ensuremath{-}\ensuremath{\beta}$, $\ensuremath{\beta}\ensuremath{-}\ensuremath{\gamma}$ and the direct $\ensuremath{\alpha}\ensuremath{-}\ensuremath{\gamma}$ phase transformations in uranium have been studied up to 45 kbar at cooling and heating rates of 3-5\ifmmode^\circ\else\textdegree\fi{}C…
Detailed calculations of the relaxational behavior of the central resonance line corresponding to transitions between levels $m=\ifmmode\pm\else\textpm\fi{}\frac{1}{2}$ have been made for $I=\frac{7}{2}$ and $I=\frac{9}{2}$ in noncubic or imperfect cubic crystals. The behavior of the central line depends on the relati…
Theoretical calculations are given for the electrical conductivity of graphite in the hexagonal layer planes. The resistivity increases with temperatures as T 1.2 between 25°K and 77°K. In the long wave-length limit, the lattice vibrations of graphite are approximatly grouped into two modes, polarization being in the…
peer reviewed
-benzoquinone, rhodizonic acid, triquinoyl (cyclohexanehexone), croconic acid, and leuconic acid (cyclopentanepentone). Certain derivatives and color tests, as well as infrared and ultraviolet spectra, are reported for their identification.
Abstract Aus Glühdrahtexperimenten, bei denen blanke sowie mit RuO 2 bedeckte Ru‐Drähte in O 2 N 2 ‐Atmosphäre erhitzt wurden, konnte abgeleitet werden, daß die Verflüchtigung des Rutheniums bei Temperaturen ≧ 1200°C im wesentlichen als RuO 3 erfolgt. Mitührungsmessungen bestätigten dieses Ergebnis. Sie zeigten ferne…