The Properties of Electrodeposited Metals and Alloys. A Handbook
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An empirical model relating the molecular weight distribution of high-density polyethylene to the shear dependence of the steady shear melt viscosity
An empirical model has been developed to relate molecular weight distribution to the shear dependence of the steady shear viscosity in high-density polyethylene melts. It uses a molecular weight, Mc, which partitions molecular weights into two classes; those below Mc contribute to the viscosity as they do at zero shea…
Tensile strength and work hardening of ultrafine-grained high-purity copper
Sputter-deposited high-purity copper specimens with grain sizes from 8.4 to 0.056 μm were tested in tension to investigate the influence of grain size on yield strength for small grain sizes. The smallest grain size in the sputter-deposited copper was a factor of 40 smaller than the smallest grain size previously avai…
Raman Scattering from Five Phases of Silver Iodide
Abstract The Raman scattering is investigated from five phases of AgI that can be reached with moderate pressure and temperature. Particularly noteworthy is the strong negative pressure coefficient of the 17 cm −1 E 2 mode in the wurtzite phase. Its mode gamma is −7.5. The intensity of this mode decreases above 1 kbar…
Debye temperatures and cohesive properties
Values of crystalline-solid Debye temperatures depend both on the method and temperature of measurement. Simple relationships between Debye temperatures and such cohesive properties as compressibility and melting point were derived over 60 years ago by Madelung, by Einstein, and by Lindemann. Debye temperatures ΘXR of…
Die Kristallstruktur von YbFe2O4
The crystal structure of YbFe 2 O 4 was determined and refined by the x-ray method. This compound crystallizes trigonal in the space group R [unk] m with the unit-cell dimensions a = 3.455 ± 0.001, c = 25.054 ± 0.010 Å. The unit cell contains three formula units. The structure consists of the alternating layers of YbO…
Adsorption of hydrogen peroxide on the surface of titanium dioxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of hydrogen peroxide on the surface of titanium dioxideA. H. Boonstra and C. A. H. A. MutsaersCite this: J. Phys. Chem. 1975, 79, 18, 1940–1943Publication Date (Print):August 1, 1975Publication History Published online1 May 2002Published inissue 1 August 1975https…
The Mineralogy of Glauconite
Abstract The mineral in monomineralic glauconite pellets is an iron-rich mixed-layer illite-smectite (here called glauconite), often composed almost entirely of illite layers. The nature of the interlayering is closely analagous to that of aluminous illite-smectite and varies with the proportions of the layer types: &…
Thermal cis–trans isomerization and decomposition of polyacetylene
Abstract Thermal cis‐trans isomerization and decomposition of polyacetylene film prepared with a Ti(OC 4 H 9 ) 4 –Al(C 2 H 5 ) 3 (Al/Ti = 4) system were investigated under inert gas or in vacuum by means of thermal analysis and infrared spectroscopy. Thermograms of differential thermal analysis of cis ‐polyacetylene r…
Notizen: Vacancy Ordering in Anion-deficient LaNiO3
Abstract LaNiO 3 loses oxygen in well-defined equilibrium stages. Electron diffraction studies show the presence of super-structure due to vacancy ordering in an anion-deficient sample.
Crystal structures and dehydrated divalent-copper-exchanged faujasite
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structures and dehydrated divalent-copper-exchanged faujasiteI. E. Maxwell and J. J. De BoerCite this: J. Phys. Chem. 1975, 79, 17, 1874–1879Publication Date (Print):August 1, 1975Publication History Published online1 May 2002Published inissue 1 August 1975https://do…
Lattice-resolution electron microscopy in structural studies of non-graphitizing carbons from polyvinylidene chloride (PVDC)
A lattice-imaging technique is applied in a study of the intimate structure of non-graphitizing PVDC C atoms heat treated in the range 803 K to 2973 K. Fine detail in the resulting electron micrographs indicates that the bulk material consists of a high proportion of intertwined crystallites comprising turbostraticall…
Estimation of mechanical properties for rigid polyurethane foams
Abstract Rigid plastic foams find application in construction mainly as core materials for loaded sandwich structures—in buildings, ground vehicles, and airplanes. This work provides an equation for the mechanical behavior of polyurethane foams as a function of foam density. Starting from a model conception and the qu…
Origin of secondary-electron-emission yield-curve parameters
From an analysis of the one-dimensional constant-loss theory of secondary electron emission, maximum yield (δm), primary electron energy at maximum yield (Eom), and both crossover energies EIoc and EIIoc are shown to depend on the surface and bulk properties of the emitting material through simple relations. In partic…
Superconductivity and electronic properties of layered compounds
The electrical, optical, and magnetic properties of layered compounds of dichalcogenides of transition metals and intercalated crystals are considered. Particular attention is paid to the anisotropy of these properties and to the analysis of the changes produced by intercalation. Experimental data are presented on the…
Model for Anomalous Self-Diffusion in Group-IVBTransition Metals
A model for anomalous diffusion in the bcc phase of group-$\mathrm{IV}B$ transition metals is proposed, based on the identity of structure of the activated complex for diffusion and the basal plane of the low-temperature metastable $\ensuremath{\omega}$ phase. An expression for the diffusion coefficient is derived fro…
Percolation Conductivity in W-Al2O3Granular Metal Films
The growth of W grains in sputtered W-${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$ films as a consequence of annealing results in a narrowing of the transition region from metallic to nonmetallic conductivity. The conductivity, $\ensuremath{\sigma}$, as a function of the volume fraction of the metal, $x$, exhibits a critical…
ChemInform Abstract: COMPLEXES OF LA(III), PR(III), ND(III), SM(III), GD(III), DY(III) AND Y(III) WITH 4‐AMINOANTIPYRINE
Abstract Die Titelkomplexe (I) wurden durch Reaktion des Liganden mit den Lanthanoidperchloraten dargestellt und durch Leitfähigkeits‐ und IR‐Untersuchungen ch siert.
Factors Affecting Design Stresses in Marine Propellers
The paper is concerned with the development of a satisfactory basis for assessing design stresses. An attempt is made to trace the prime factors involved and details are given of corrosion fatigue tests at various mean stresses on propeller alloys in the form of heavy castings. A new philosophy of design stressing has…
Electron spin resonance in V1-xCrxO2
Electron spin resonance has been studied in V 1-x Cr x O 2 compounds in the range fo compositions (0.3%<x<3%). The behaviour of the Cr 3+ resonance in the three insulating phases M 1 , T and M 2 has been examined. Strong modifications of this resonance occur at the M 1 -T phase transition, for which an interpretation…