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。
The cathodic polarization of the electrodes sputtered on yttria stabilized zirconia electrolyte was studied at 800°C in air. The system showed high electrode activity for oxygen reduction. The study of the electrode resistance as functions of and temperature revealed that the rate‐determining steps for oxygen reductio…
Abstract Dolomite rock textures can be classified according to crystal size distribution and crystal boundary shape. The classification scheme presented here is largely descriptive but carries genetic implications because size distribution is controlled by both nucleation and growth kinetics, and crystal boundary shap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA modified UNIFAC group-contribution model for prediction of phase equilibria and heats of mixingBent L. Larsen, Peter Rasmussen, and Aage FredenslundCite this: Ind. Eng. Chem. Res. 1987, 26, 11, 2274–2286Publication Date (Print):November 1, 1987Publication History Published…
1. An Introduction to Electron Energy-Loss Spectroscopy.- 1.1 Interaction of Fast Electrons with a Solid.- 1.2. The Electron Energy-Loss Spectrum.- 1.3. The Development of Experimental Techniques.- 1.4. Comparison of Analytical Methods.- 1.4.1. Ion-Beam Methods.- 1.4.2. Incident Photons.- 1.4.3. Electron-Beam Techniqu…
Filtration in the Pharmaceutical Industry , Filtration in the Pharmaceutical Industry , کتابخانه دیجیتال جندی شاپور اهواز
The current status and prospects are examined of the rapidly developing field that studies the structure and properties of lyotropic nematic liquid crystals. Typical amphiphiles are presented, and systems based on them. Typical textures and their optical properties are examined. The physical properties of nematics are…
Cathodoluminescence studies of the 3.188 eV vibronic band in 12 C and 13 C synthetic diamonds show that the sharp peaks at around 3.0 eV are local-mode replicas of the zero-phonon line. Accurate measurement of the isotope shifts shows that one of these modes involves the vibration of a single nitrogen atom. This inter…
A woven, double velour Dacron vascular graft was made nonporous by coating it with a layer of collagen prepared from fresh, young calf skin. Grafts were implanted in the thoracic aorta of 24 mongrel dogs and were examined at intervals up to 180 days. The grafts did not require preclotting or special preparation before…
Absolute electron scattering cross sections for argon, krypton and xenon have been measured at low electron energies using the powerful technique of photoelectron spectroscopy. The measurements have been carried out at electron energies varying from 0.7 to 10 eV with an accuracy of +or-2.7%. The cross sections obtaine…
We report the first observation of the absence of the photodarkening (PD) effect in bulk chalcogenide glasses. In the prototype systems ${\mathrm{Cu}}_{\mathrm{x}}$(${\mathrm{As}}_{0.4}$${\mathrm{S}}_{0.6}$${)}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$ and ${\mathrm{Cu}}_{\mathrm{x}}$(${\mathrm{As}}_{0.4}$${\mathrm{Se}}_{…
Thin epitaxial layers of Ge-Si alloys have been formed on Si(100) substrates by steam oxidation of Ge-implanted samples. During the oxidation, the Ge is totally piled up ahead of the SiO2/Si interface. This segregation of Ge leads to the formation of a distinct, Ge-rich layer which is epitaxial with the underlying Si.…
Resonant Raman spectroscopy has been used to study amorphous hydrogenated carbon films. For films containing both sp2 and sp3 bonded carbon a well-defined high-frequency shift of the main Raman peak is observed with increasing exciting photon energy. This shift is interpreted in terms of scattering from π-bonded carbo…
1,12916MetricsTotal Downloads1,129Last 6 Months94Last 12 Months248Total Citations16Last 6 Months0Last 12 Months0View all metrics
10117MetricsTotal Downloads101Last 6 Months20Last 12 Months31Total Citations17Last 6 Months0Last 12 Months0View all metrics
During recent measurements of thermal conductivity using the transient hot-wire method, data were obtained for pressure-temperature coordinates corresponding to transitions amongst phases I, II, III and IV and NH 4 I which extended reliable knowledge of the phase diagram to pressures of 2 GPa. Comparison of the phase…
A detailed account is given of the matching procedure devised to calculate surface phonon and resonance dispersion curves. Each kind of phonon symmetry is studied separately. A secular equation is first derived which is shown to contain in particular all the information on the dispersion curves and density of states o…
The narrow-band noise (NBN) in the charge-density-wave conductor ${\mathrm{NbSe}}_{3}$ is found to fluctuate dynamically in frequency, amplitude, and harmonic content. The NBN width is dominated by slow frequency fluctuations rather than a spatial velocity distribution. Mode locking quenches these fluctuations yieldin…
Optical properties of β-Bi2O3 films prepared by activated reactive evaporation are studied from 0.5 to 3.5 eV. It is shown that β-Bi2O3 is an indirect band gap semiconductor with a band gap of (1.74 ± 0.5) eV and the optical transition leading to this is an allowed one. The direct gap of β-Bi2O3 is 2.6 eV.
Several high-intensity synchrotron x-ray sources have been constructed over the past few years in the United States, West Germany, Great Britain, Japan, France, Italy, and the Soviet Union. Crystallographers have begun to use these facilities for experiments that take advantage of the characteristics of synchrotron ra…
The structure and magnetic properties of equiatomic FeCo alloys with ternary additions of up to 1.92 at% Nb and 6 at% V are studied by means of Mössbauer spectroscopy, complemented with light and electron microscopy and the determination of magnetisation curves, as function of heat treatment. The main features of the…