Materials Literature
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The development and use of electron and X-ray diffraction techniques to study the structure of grain boundaries in crystalline materials is reviewed. The fundamental questions that need to be answered about the structure of boundaries are discussed. The scattering expected from a small-angle twist boundary is calculat…
The steam electrolysis between 800° and 950°C has been investigated with a cell consisting of the following elements: electrolyte, 400μ of ytterbia stabilized zirconia; anode, 100μ of vacuum deposited tin doped india; cathode, a sputter deposited cermet of nickel and urania doped ytterbia stabilized zirconia. These ce…
The discovery, at Chalk River Nuclear Laboratories, of a simple method of wetproofing platinum catalysts so that they retain their activity in liquid water stimulated a concentrated research program for the development of catalysts for the hydrogen-water isotopic exchange reaction. This paper reviews 10 years of study…
The effect of two-magnon-one-phonon scattering processes on the lattice thermal conductivity of antiferromagnets is studied. Transition matrix elements are obtained by expansion in lattice displacements of the exchange and anisotropy for an anisotropic Heisenberg Hamiltonian. Relaxation times for the phonons are deter…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBi- and polynuclear antiferromagnetic metal complexes (copper,nickel) with salicylaldimines and acetate-type ligands. New modes of acetate bridgingRay J. Butcher, John W. Overman, and Ekk SinnCite this: J. Am. Chem. Soc. 1980, 102, 9, 3276–3278Publication Date (Print):April…
The apparatus described is based on the Faraday law of electromagnetic induction and is especially suited for toroidal samples of ferrimagnetic compounds. The measurements can be performed at frequencies from 1 to 100 kHz and temperatures from 80 to 900K. In addition to the initial permeability and the Curie temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Kinetics of Porphyrin Hydrodemetallation. 2. Vanadyl CompoundsChi-Wen Hung and James WeiCite this: Ind. Eng. Chem. Process Des. Dev. 1980, 19, 2, 257–263Publication Date (Print):April 1, 1980Publication History Published online1 May 2002Published inissue 1 April 1980http…
Slow cooling of a hot acetonitrile solution of tetrathiafulvalene (TTF) and iodine yields a mixture of crystalline products including monoclinic crystals of high iodine composition: TTF I3. A single crystal X-ray structure analysis has been carried out on these crystals of symmetry P2 sub 1/n with 4 molecules per unit…
The thermal decomposition of solid PVC was studied in the presence of added hydrogen chloride and hydrogen bromide over the temperature range 170–210°C. Under certain conditions the decomposition was shown to be dependent in a first-order manner on the hydrogen halide pressure. These gases acted as catalysts, increasi…
The toughening mechanism was investigated by means of mechanical and optical techniques including electron microscopy and polarized light scattering for wide variety of domain morphologies of di-and triblock copolymers and their blends with corresponding homopolymers. Two types of plastic deformation mechanisms of gla…
Abstract The crystallization behavior of high density polyethylene/isotactic polypropylene blends (HDPE/PP) was investigated. The overall kinetics of crystallization of HDPE may be strongly influenced by the addition of a small fraction of PP. At 398 K the half crystallization time of the blend containing 10% by weigh…
The transformation of graphite to diamond by impact-produced shock waves has been examined using a gas gun to launch projectiles onto graphite and a graphite-metal mixture. Analysis of the mechanism of transformation is complicated by the post shock graphitization of most of the diamond produced. It is argued that the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic susceptibility study and ground-state zero-field splitting in manganese(III) porphyrinsD. V. Behere and Samaresh MitraCite this: Inorg. Chem. 1980, 19, 4, 992–995Publication Date (Print):April 1, 1980Publication History Published online1 May 2002Published inissue 1…
The subjective assessment of a textile material obtained from the sense of touch is an essential consideration in fabric manufacture and marketing. This paper reviews what the authors judge to be the most significant contributions to the problems of evaluating hand in an organized and quantitative manner.
Abstract The silhouette of a sessile drop submerged in a transparent bulk phase appears to possess a contact angle of 180° with a plane solid support, when the drop is separated from the solid surface by a thin film of surrounding fluid. A computer‐aided analysis of the generalized sessile drop form leads to an explic…
Considering the magnetic symmetry of a screw spin structure, it was shown that the sense of the screw spin structure can be controlled by a magnetoelectric cooling. It was confirmed experimentally in ZnCr 2 Se 4 by means of a polarized neutron diffraction.
Abstract Photoresponsive membranes have been constructed by incorporating the amphiphatic alkylammonium salts containing azobenzene chromophores into dipalmitoylphosphatidylcholine liposomes.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemplate synthesis of macromolecules. Synthesis and chemistry of functionalized macroporous poly(divinylbenzene)Kenneth J. Shea, Evan A. Thompson, Sue D. Pandey, and Philip S. BeauchampCite this: J. Am. Chem. Soc. 1980, 102, 9, 3149–3155Publication Date (Print):April 1, 1980…
A cathodoluminescence detector on a V.G. Microscopes HB5 STEM has been used to form high-resolution cathodoluminescence images of single dislocations in natural type-IIb diamond. The cartridge and light-collection systems are described and stray-electron effects are discussed. The cathodoluminescence and transmitted-e…
A new class of nematic liquid-crystal storage effects with potential display applications is described. We have developed structures, produced by special surface alignment patterns, exhibiting bistable configurations. Switching between states has been demonstrated with both electric and magnetic fields. The movement o…