Materials Literature
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Abstract Clays can act as osmotic membranes and thus give rise to osmotically induced hydrostatic pressures. The magnitude of generated osmotic pressures in geologic systems is governed by the theoretical osmotic pressure calculated solely from solution properties and by value of the membrane's three phe-nomenological…
Lattice parameter and density data were compiled for Y 2 O 3 ‐Stabilized ZrO 2 , both from the literature and from experimental measurements. The data are described very well over a wide range of composition by the model of Aleksandrov et al. , which assumes Y substitution for Zr in the unit cell with compensating ani…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexasulfonated calix[6]arene derivatives: a new class of catalysts, surfactants, and host moleculesSeiji. Shinkai, Seiichi. Mori, Hiroshi. Koreishi, Takayuki. Tsubaki, and Osamu. ManabeCite this: J. Am. Chem. Soc. 1986, 108, 9, 2409–2416Publication Date (Print):April 1, 1986…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution aluminum-27 NMR of aluminosilicatesE. Lippmaa, A. Samoson, and M. MagiCite this: J. Am. Chem. Soc. 1986, 108, 8, 1730–1735Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEpoxidation of olefins with cationic (salen)manganese(III) complexes. The modulation of catalytic activity by substituentsK. Srinivasan, P. Michaud, and Jay K. KochiCite this: J. Am. Chem. Soc. 1986, 108, 9, 2309–2320Publication Date (Print):April 1, 1986Publication History…
A low temperature thermal cleaning method for Si molecular beam epitaxy (MBE) is proposed. This method consists of wet chemical treatment to eliminate carbon contaminants on Si substrates, thin oxide film formation to protect the clean Si surface from contamination during processing before MBE growth, and desorption o…
Data on the chemisorption of oxygen on a number of metals (Pt, Pd, Ir, Ru, Ni, etc.), obtained by SED, EAS, XES, etc., have been reviewed. The bond energies and principal properties of the two types of Oads on metals (non-reconstructive and reconstructive), and also the conditions for the realisation of each type of a…
Series solution calculations of cooling rates are applied to a variety of samples with different thermal properties, including an analog of an Apollo 15 green glass and a hypothetical silicate melt. Cooling rates for the well‐studied green glass arid a generalized silicate melt (density = 2.5 g/cm 3 , heat capacity =…
The interest in the subject of ion-containing polymers has continued unabated since the development of organic ion-exchange resins in the 1940's. This interest is due to the variety of properties and applications that result from the interactions of ions bound to organic macromolecules. These interactions affect the p…
The effect of a slowly receding electron on the shape and location of an Auger line is investigated for Auger transitions following photoionisation of an inner-shell electron. The theory of Niehaus and Morgenstern (1977) is reformulated and extended to take into account the time it takes for the fast Auger electron to…
An ionic fluid is modelled as a mixture of dipolar hard spheres (the solvent) and charged hard spheres (the ions). The free energy is expanded in a power series in the inverse temperature. Some of the terms in this expansion are infinite. However, these terms can be resummed to give a finite result. This expansion red…
Evidence is presented for the presence of a "shakedown" satellite near threshold in the $\mathrm{C}\ensuremath{-}\mathrm{KVV}$ Auger spectrum of graphite. Its origin is shown to be an electron in a relatively long-lived valence-core excitonic level (populated as a result of dynamic core-hole screening) which participa…
A modified dispersion formula describing two-dimensional (2D) plasmons in AlGaAs/GaAs heterointerfaces was derived and its validity was experimentally checked by observation of the far-infrared signal from grating coupled 2D plasmons in selectively doped AlGaAs/GaAs heterointerfaces. The plasmon resonance frequency sh…
Using optical absorption measurements of synthetic diamond under uniaxial stress at room temperature two bands were identified with peaks at 3.9 eV and at 3.3 eV, being polarised perpendicular and parallel, respectively, with respect to a trigonal (111) axis. They are attributed to transitions between the ground and f…
Abstract The room-temperature mechanical properties of austenitic stainless steel (AISI 304H) internals removed from fluid catalytic cracking unit (FCCU) regenerators were evaluated after 7 to 16 y of service. Mechanical property testing included tensile testing, notched-tensile testing, and charpy V-notch impact test…
Abstract A number of leaks were discovered at refinery piping welds in lean amine service at temperatures which, in the past, had been considered to be below the threshold temperature for stress-corrosion cracking. Therefore, these welds had not received post weld heat treatment. Subsequent metallurgical examination r…
Ions dissolved in nematics screen the flexoelectric polarization induced by distortions. I show that for long-range distortions (long compared to the Debye length), the free energy associated with these effects varies as the fourth power of the distortion wave vector. This free energy has a magnitude at least ${10}^{5…
We consider densely packed assemblies of icosahedra, such that icosahedral bond-orientational order is enforced throughout the sample. The peaks in the calculated diffraction patterns may be put in a one-to-one correspondence with the electron and x-ray diffraction patterns from icosahedral Al-Mn alloys, allowing the…
Transmission electron microscopy study of hot-pressed and hot-deformed Nd0.14(Fe0.94B0.06)0.86 magnets shows that the magnetic alignment is achieved by the formation of a microstructure consisting of platelets of Nd2Fe14B grains with the c axis normal to the platelet surface and parallel to the press direction. Magnet…
A complete systematic IR study (400 to 4000 cm−1) of AgNO3 is carried out over a wide range of temperature (30 to 195 °C) and new results are reported for the order–disorder phase transition II–I. The study includes measurements and interpretations of the IR spectral band shape, intensities, and frequencies of the int…