Vapor corrosion inhibitors
Report describes effectiveness and materials compatibility of amine nitrites. Particularly of value to those interested in long-term corrosion protection.
Materials Literature
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Progress in Aberration Correction in the Stem
A STEM which includes a corrector for primary spherical aberration has been built and is being put into1operation. The microscope is expected to achieve a resolution of 1 Å at 50 keV. This high resolution is possible because of the correction of spherical aberration. The corrector and its operation have been described…
Two‐Photon Absorption of Anisotropic Excitons in β‐AgI
Abstract Exciton fine structure is measured in hexagonal AgI by two‐photon absorption. A detailed assignment of the different P‐exciton states is possible using the appropriate polarization configurations. The experimental results can be explained quantitatively taking into account anisotropy as the only perturbation…
Antifungal properties of α,ω-alkanedicarboxylic acids and their dimethyl esters
Thirteen alpha, omega-alkanedicarboxylic acids (C2-C12, C14, and C16) and their dimethyl esters were tested against Aspergillus niger, Trichoderma viride, and Myrothecium verrucaria in Sabourauc dextrose agar at pH 4.0 AND 5.6. Toxicity to Canadida albicans, Trichophyton mentagrophytes, and Mucor mucedo was determined…
Molten Clad Motion Model for Fast Reactor Loss-of-Flow Accidents
The motion and location of the molten clad during an unprotected loss-of-flow accident in liquid-metal fast breeder reactors are very important because of their effect on the reactivity and the subsequent fuel motion. The present study analyzes the clad relocation problem based on a single-channel film flow model and…
Temperature Dependence of the Enthalpy of Formation of Liquid Ge Te Alloys
Abstract Enthalpies of formation h 1 of Ge Te alloys were measured by direct reaction calorimetry in the temperature range 1030 < T /K < 1150 and at mole fractions 0.25 < x Ge < 1. The measurements were performed with a high temperature ( T /K < 1400) Tian‐Calvet calorimeter. When referred to liquid te…
Anisotropic Indirect Absorption Edge in GeSe
Abstract The absorption and reflection coefficients of GeSe single crystals are measured at various temperatures in the spectral range 0.8 to 2.2 μm using linearly polarised light. The main absorption mechanism is due to indirect interband electronic transitions with participation of two different phonons. Indirect en…
Atomic oxygen-metal surface studies as applied to mass spectrometer measurements of upper planetary atmospheres
An atomic oxygen beam and mass spectrometer were used to measure the oxygen atom reflection γ16, recombination γ32, general surface reaction γM, and occlusion γ0 probabilities on six different engineering surfaces as a function of atomic oxygen exposure. The materials studied include gold, Nichrome V, aluminum, titani…
Response by sugar beet to potassium and sodium fertilizers, particularly in relation to soils containing little exchangeable potassium
Summary Twenty experiments between 1970 and 1974 tested the effect of spring applications of all combinations of five amounts of potassium (0–333 kg K/ha) and two amounts of sodium (0, 150 kg Na/ha) on sugar-beet yield, profitability and the amount of K and Na in the crop in mid-summer. The experiments were in commerc…
Prediction of vinyl chloride monomer migration from rigid PVC pipe
Abstract Data on the solubility and diffusion of vinyl chloride monomer (VCM) in PVC resin powders have been combined with published solutions of Fick's diffusion equation to yield predictions of the amount and rate of loss of residual VCM (RVCM) from rigid PVC pipe under storage and service conditions. The principal…
Transport of hydrogen in liquid lithium
The solubilities and diffusion coefficients of H2 in liquid Li contained in cylinders of Nb and Nb/1%Zr were determined in the temperature range 625–905°C and pressure range 13–1333 Pa. Simultaneous radial and axial diffusion into a finite solid cylinder adequately described the transport of H2 into liquid Li. The dif…
Magnetic properties of some electrically conducting perylene-metal dithiolate complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of some electrically conducting perylene-metal dithiolate complexesLuis Alcacer and August H. MakiCite this: J. Phys. Chem. 1976, 80, 17, 1912–1916Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published inissue 1 Aug…
Crystallization of bisphenol‐A polycarbonate. I. Influence of trimellitic acid tridecyloctyl ester on the kinetics of crystallization
Abstract The crystallization of bisphenol‐A polycarbonate plasticized by trimellitic acid tridecyloctyl ester (Morflex 525) has been studied. A half‐crystallization time of 100 min is observed at 170°C with 10% of plasticizer compared with a figure of 18,000 min for the unplasticized material. The kinetic study is lim…
Formation of Phyllosilicates and Zeolites from Pure Silica-Alumina Gels
Abstract The hydrothermal aging of pure silica—alumina gels in presence of 10 ml of 0.1 N sodium hydroxide solution at 175, 150 and 130°C for 8–30 days led to the synthesis of zeolites and the phyllosilicates, beidellite and kaolinite. The solution was neutralized by a partial hydrolysis of the gel which readily reorg…
Bismuth centers in alkali halides
Bismuth enters into the alkali halide lattice in its trivalent and/or divalent state if it is introduced by diffusion of bismuth vapors at appropriate temperatures. In its trivalent state its ground state is $^{1}S_{0}$ and transitions from this level to the $^{3}P_{1}$, $^{3}P_{2}$, and $^{1}P_{1}$ states are the wel…
Quantitative structure-activity relationships. 3. A comparison of different Free-Wilson models
The Fujita-Ban model and the classical Free-Wilson model are shown to be linearly related: the de novo group contributions obtained by one model are linear transformations of those obtained by the other model. An example is given to illustrate this linear dependence. The Fujita-Ban model is characterized by a number o…
Metallization for integrated circuits using a lift-off technique
A special lift-off technique for realizing small metal interconnection geometries for integrated circuits is described. 0.6-/spl mu/m gaps between metal conductors can be obtained even at 0.8-/spl mu/m metal layer thickness. The slopes of the conductors are tapered. Etching problems inherent in alloy films or sandwich…
Optical properties of amorphous arsenic
The optical constants of sputtered and bulk amorphous As have been obtained from 0-03 to 30 eV by Kramers-Krönig analysis of the reflectivity spectra. The optical gap for oxygen free films occurs at 1-1 eV. The slope of the exponential absorption edge (12 eV−1) is contrasted with slopes reported for other elemental am…
Dimensional stability of fused silica, Invar, and several ultralow thermal expansion materials
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text J. W. Berthold, S. F. Jacobs, and M. A. Norton, "Dimensional stability of fused silica, Invar, and several ultralow thermal expansion materials," Appl.…
Appearance potential spectroscopy studies with Fe/Ni alloys
Soft X-ray appearance potential spectra were recorded for a series of Fe/Ni alloys whose compositions in the surface region were determined by means of Auger electron spectroscopy. The L 3 appearance potentials (correlated with the binding energies of 2p 3/2 electrons) of Ni increase by 0.5 eV between 0 and 30% Fe and…