Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Mixed-layer clays composed of randomly interstratified kerolite/stevensite occur as lake and/or spring deposits of probable Pliocene and Pleistocene age in the Amargosa Desert of southern Nevada, U.S.A. The percentage of expandable layers of these clays, determined from computer-simulated X-ray diffractograms…
We have studied the adsorption of pure CO and CO:H2 mixtures on powdered ZnO using the combined techniques of transmission infrared spectroscopy and temperature programmed desorption (TPD). When CO is adsorbed alone, the vibrational frequency ωCO decreases from 2192 to 2178 cm−1 with increasing CO coverage, and a repu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting-crystallization and premelting properties of sodium nitrate-potassium nitrate. Enthalpies and heat capacitiesDerek J. Rogers and George J. JanzCite this: J. Chem. Eng. Data 1982, 27, 4, 424–428Publication Date (Print):October 1, 1982Publication History Published onli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew copper chemistry. V. New heterocuprates with greatly improved thermal stabilitySteven H. Bertz, Gary Dabbagh, and G. M. VillacortaCite this: J. Am. Chem. Soc. 1982, 104, 21, 5824–5826Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Pu…
The fabrication of transparent conducting films of ZnO is described. These films are deposited on room temperature glass substrates using an enhanced reactive evaporation technique in which the power in a dc glow discharge, the oxygen pressure, and the zinc evaporation rate are controlled separately. Each of these par…
Abstract Deposits of sepiolite, trioctahedral smectite (mixed-layer kerolite/stevensite), calcite, and dolomite, found in the Amargosa Flat and Ash Meadows areas of the Amargosa Desert were formed by precipitation from nonsaline solutions. This mode of origin is indicated by crystal growth patterns, by the low Al cont…
We explain the compensation effect by counting the ways in which the heat bath can furnish the energy necessary to surmount the barriers.Received 15 March 1982DOI:https://doi.org/10.1103/PhysRevB.26.3774©1982 American Physical Society
The design of concentric-neutral plastic-insulated power cables has been optimized for the transmission and distribution of large quantities of 60-Ηz power at high voltages. Understanding the mechanism of high frequency propagation in these cables is important in order to evaluate the sensitivity of partial discharge…
J. E. Turner, H. G. Paretzke, R. N. Hamm, H. A. Wright, R. H. Ritchie, Comparative Study of Electron Energy Deposition and Yields in Water in the Liquid and Vapor Phases, Radiation Research, Vol. 92, No. 1 (Oct., 1982), pp. 47-60
Abstract The relationship was determined between sub‐ T g molecular motions and the transport of O 2 and CO 2 in amorphous polyesters and copolyesters based on poly(ethylene terephthalate) [PET] and poly(1,4‐cyclohexylenedimethylene terephthalate) [PCDT], Modifications of the polyester with certain acid co‐monomers re…
Novel low threshold nematic mixtures are presented exhibiting very low dielectric crossover frequencies fc ≃ 1 kHz at 20°C and unusually large, low- as well as high-frequency dielectric anisotropies ΔEL > 4 and ΔEH < 4 respectively. ΔEL and ΔEH are shown to be independently adjustable. The frequency and temperature de…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular theory of nematic liquid crystalsWilliam M. GelbartCite this: J. Phys. Chem. 1982, 86, 22, 4298–4307Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Published inissue 1 October 1982https://doi.org/10.1021/j100219a007RIGHTS & PER…
Individual platinum-group elements, as well as Au, Cu, and Ni, were determined in borehole cores of the UG-2 chromitite layer from different localities in the Bushveld Complex. The average noble metal content of the layer is about 7 ppm; Pt is most abundant, followed by Pd, Ru, Rh, Ir, and Au, in that order. Noble met…
A linear least-squares computer program that implements the procedure described by Shoemaker & Bassi [Acta Cryst. (1970), A26, 97–101] has been written. With this technique constraints appropriate to the lattice symmetry may be imposed during refinement of the coefficients of the orientation matrix. Cell parameters an…
The validity of simpler additive models, accounting for nonlinear optical properties of van der Waals crystals in terms of independent molecular contributions is questionable in the case of more associated molecular structures such as examplified by the hydrogen-bonded crystal lattice of urea. A number of one-electron…
Preliminary investigations have shown that a family of chalcogenides may be deposited in technologically useful thin film form by an inexpensive technique of spin deposition from solution. The materials which are amorphous and microstructure free retain many of the properties of the solute (e.g., As2S3, As2S2, As2Se3,…
Transmission electron microscopy (at 100 and 1000 kV potential) and analytical scanning transmission electron microscopy were used to study α‐Al 2 0 3 second‐phase particles and their interactions with grain boundaries in two high‐conductivity Y 2 0 3 /Yb 2 0 3 stabilized zirconia ceramics containing deliberate additi…
The intensity of the small-angle X-ray and neutron scattering from a polydisperse system of randomly oriented independently scattering particles is shown to be proportional to h−α for all values of the scattering vector h when the distribution of particle dimensions is proportional to r−(2d + 1 − α), where h = 4πλ−1 s…
The crystal structure of α-SiO2 (low quartz) has been refined at 296, 78, and 13 K from time-of-flight neutron powder diffraction data. The major effect of temperature from 296 to 78 K is a nearly rigid body rotation of the SiO4 tetrahedra. Below 78 K, tetrahedral rotation is substantially reduced giving rise to a muc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCounterion and solvent effects on the electrode reactions of manganese porphyrinsS. L. Kelly and K. M. KadishCite this: Inorg. Chem. 1982, 21, 10, 3631–3639Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Published inissue 1 October 1982h…