Materials Literature
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Optical reflectance studies of the $c$ face of pyrolytic boron nitride were carried out at room temperature in the photon energy range 0.45---10 eV. A Kramers-Kronig analysis was performed to determine the in-plane real (${\ensuremath{\epsilon}}_{1}$) and imaginary (${\ensuremath{\epsilon}}_{2}$) dielectric functions.…
A new, highly multiplexable liquid crystal display is described, which has a superior image quality than a twisted nematic display multiplexed at the same high level. The display cell consists of a chiral-doped nematic layer with tilted boundaries and a twist angle of ∼270°. It operates in a birefringent optical mode…
High-resolution vanadium $K$-edge absorption spectra have been recorded for a number of selected vanadium compounds of known chemical structure with use of the synchrotron radiation available at the Stanford Synchrotron Radiation Laboratory (SSRL). The compounds studied include the oxides VO, ${\mathrm{V}}_{2}$${\math…
The phenomenon of cavitation occurs when a tension, applied to a liquid, exceeds a certain critical value known as the breaking tension or cavitation threshold. The present review article considers various ways in which liquids have been subjected to tension and how the accompanying cavitation has been studied. The im…
A recently developed Landau description of short-range icosahedral order in supercooled liquids and metallic glasses is used to calculate density correlation functions in these systems. The theory predicts frustration-broadened peaks in the structure factor, at positions determined by the symmetries of an ideal, curve…
We have observed a metallic solid (Al-14-at.%-Mn) with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations. Its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice. The solid is metastable and forms from…
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1 Introduction.- 1.1 Scope of the Book.- 1.2 General Remarks on the Use and the Behavior of Ceramic Materials.- 1.3 The History of Alumina.- 1.4 Preceding Summarizing Literature on Alumina.- 2 Physical Properties.- 2.1 Structure.- 2.2 Thermal Properties.- 2.3 Diffusion.- 2.3.1 General Remarks on Diffusion Phenomena in…
We introduce electrochromic coatings for use on "smart windows" with dynamic control of radiant energy. Applications, operating principles, materials options, and device configuration are briefly reviewed. We then focus on electrochromic WO3 and investigate crystalline films by computations aimed at assessin…
Article Structural and antiferroelectric phase transitions in betaine phosphate, (CH3)3NCH2COO · H3P04 was published on November 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 168, issue 1-4).
Domain modifications due to compressive stress applied perpendicular to the rolling direction (RD) of coated HI-B sheets are discussed. Both single and stacked sheets were investigated. Compressive stress normal to the sheet surface, as well as compressive stress within the sheet plane, was found to cause refinement o…
Article Crystal structure, polarity and morphology of 4-0-β-D-galactopyranosyl-ɑ-D-glucopyranose monohydrate (ɑ-lactose monohydrate): a redetermination was published on November 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 168, issue 1-4).
Abstract not Available.
Neutron activation technique was used to measure the amounts of I, Ag and Na elements in zeolite samples. The samples were nonradioactive before the activation analysis; this facilitated various operations to investigate the chemical form of the sorbed iodine. It was found that the Ag+ ions positioned in three types o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel organic photochromicS. D. Cox, C. W. Dirk, F. Moraes, D. E. Wellman, Fred Wudl, M. Soltis, and C. StrouseCite this: J. Am. Chem. Soc. 1984, 106, 23, 7131–7133Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1 No…
Abstract A comparative study of the cure behavior of thiocarbamyl sulfenamides both in the presence of MBTS and thiazole sulfenamides has been made at 140 and 170°C. It is observed that most of the NR vulcanizates obtained at 170°C are capable of retaining a considerable portion of torque, modulus, and tensile values…
Abstract Complexes of urea with polyethers, \documentclass{article}\pagestyle{empty}\begin{document}$\rlap{‐‐} [\left( {{\rm CH}_2 } \right)_m {\rm O\rlap{‐‐} ]}_n$\end{document} ( m = 2–4, 6, 8–10), were prepared, and their crystal structures and decomposition temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical alloying, a novel method for the preparation of homogeneous selenium-tellurium (SexTe1-x) alloysThomas W. Smith, Steven D. Smith, and Santokh S. BadeshaCite this: J. Am. Chem. Soc. 1984, 106, 23, 7247–7248Publication Date (Print):November 1, 1984Publication History…
The common corona charger consisting of wire or needle, gnrd, and one side metalized sample has been modified to obtain a more uniform surface potential over the area of interest. The better uniformity is obtained by adding an aperture between grid and sample close to the surface to be charged. This aperture is connec…
The dielectric constant ε′(ω) and the a.c. conductivity σ(ω) of undoped and lightly doped (0·5% Al, 0·8% Ti, 0·5% W) crystals of vanadium dioxide (VO2) are reported for the temperature range 4·2–77 K and the frequency range 0·1–100 kHz. The 0·5% W-doped sample shows a strong dispersion in ε′(ω) and a frequency-indepen…