Materials Literature
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High-resolution synchrotron-radiation powder data for quartz and Mg2GeO4, an olivine homologue, were obtained with a 365 mm long parallel-slit collimator with 0.05° aperture. The crystal structures were refined using a pseudo-Voigt profile fitting function and POWLS. Fourier maps were calculated from the measured stru…
The transfer function of a transformer winding is deconvoluted in the frequency domain from the digitally recorded neutral current and high voltage applied during impulse tests. The integrity of the winding insulation is determined by comparing the transfer function obtained at full and reduced test voltage. Differenc…
Results are presented for the measured single‐crystal elastic constants of yttria‐stabilized zirconia, for yttria contents of 1.7 to 20 mol%. The results cover a range of materials which vary from a mixture of monoclinic, tetragonal, and cubic to those which are fully cubic. These single‐crystal measurements are used…
The kinetics of molecular-beam epitaxy are examined by means of Monte Carlo simulations in combination with a new approach for monitoring surface growth, i.e., by calculating the evolution of the surface step density. The evolution of the step density is shown to have a remarkable correspondence to that of the measure…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWet oxidation catalyzed by ruthenium supported on cerium(IV) oxidesSeiichiro Imamura, Ikumi Fukuda, and Shingo IshidaCite this: Ind. Eng. Chem. Res. 1988, 27, 4, 718–721Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 Ap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical reactions of imidazole with metallic silver studied by the use of SERS and XPS techniquesGi. Xue, Quinpin. Dai, and Shuangen. JiangCite this: J. Am. Chem. Soc. 1988, 110, 8, 2393–2395Publication Date (Print):April 1, 1988Publication History Published online1 May 200…
Abstract The build‐up of a positive charge during the XPS measurement of nonconducting materials can severely affect the spectral resolution leading to line broadening and time‐dependent energy shifts. The use of a low kinetic energy electron flood gun in conjunction with a metal screen placed in close proximity to th…
The development and the present state of a few key aspects of the theory of plasticity are sketched as a guide to the literature for those new to or not centrally involved in the subject. Only a small fraction of this extensive literature is cited. Special attention is paid to the frequently inspirational but more oft…
A novel oligonuclear compound, containing six manganese( 11) ions and six nitronyl-nitroxide radicals NITPh (NITPh = 2-phenyl-4,4,5,5-tetramethyl-4,5-dihydr1oH- -imidazolyl- 1- oxy1 3-oxide), [Mn(hfac),NITPh],, was synthesized, and its crystal structure, magnetic properties, and EPR spectra are reported. This cyclohex…
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Quantitative bulk ferromagnetic behavior has been established for the molecular/organic solid [Fe(III)(C(5)Me(5))(2)].(+)[TCNE].(-). Above 16 K the dominant magnetic interactions are along a 1-D chain and, near T(c), 3-D bulk effects as evidenced by the value of the critical exponents dominate the susceptibility. The…
New optoelectronic materials based on polymer dispersed liquid crystals (PDLC) show great potential for application in displays, temperature sensors, optical computing and for solar energy control. We report liquid crystal, termoset or thermoplastic materials. PDLC materials may be formed by several different processe…
Electrochemical impedance spectroscopy (EIS) has been used to characterize the surfaces of anodized Al alloys during exposure to 0.5 N NaCl . The EIS‐data show pronounced effects of anodizing procedure (sulfuric acid, chromic acid), sealing procedure (unsealed, hot water, dichromate), and alloy chemistry (Al 2024, Al…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIndium in organic synthesis: indium-mediated allylation of carbonyl compoundsShuki Araki, Hirokazu Ito, and Yasuo ButsuganCite this: J. Org. Chem. 1988, 53, 8, 1831–1833Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 Ap…
Using a first-principles total-energy pseudopotential method, we investigate the transition mechanism for a pressure-induced martensitic transformation hcp\ensuremath{\rightarrow}bcc which occurs in Mg at pressures around 50 GPa. Two internal structural degrees of freedom are selected and one lattice is transformed in…
In the 1960s the Fourier and variance methods superseded the use of the FWHM and integral breadth in detailed studies of microcrystalline properties. Provided that due allowance is made in the analysis for systematic errors, particularly the effects of truncation of diffraction line profiles at a finite range, these r…
Abstract Crystal growth theory was applied to describe edge sites of phyllosilicates. Three face configurations were found to exist. One face has one tetrahedral site per tetrahedral sheet and two octahedral one-coordinated sites per crystallographic area ac sin β , where a and c are layer dimensions and β is the angl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen bonding in polymer blends. 4. Blends involving polymers containing methacrylic acid and vinylpyridine groupsJoon Y. Lee, Paul C. Painter, and Michael M. ColemanCite this: Macromolecules 1988, 21, 4, 954–960Publication Date (Print):April 1, 1988Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuaternary ammonium tetrakis(diperoxotungsto)phosphates(3-) as a new class of catalysts for efficient alkene epoxidation with hydrogen peroxideCarlo Venturello and Rino D'AloisioCite this: J. Org. Chem. 1988, 53, 7, 1553–1557Publication Date (Print):April 1, 1988Publication…
We report a size effect on the ferroelectric phase transition in ${\mathrm{PbTiO}}_{3}$ ultrafine particles. The samples were synthesized by an alkoxide method. The size was determined by x-ray analysis with the aid of Scherrer's equation. When the particle size is less than 50 nm, the transition temperature ${T}_{c}$…