Materials Literature
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Phase equilibria of the vanadium‐oxygen system have been restudied in the composition range in order to establish the conditions required for stable existence of the phase. Using this knowledge, it was possible to prepare films of exhibiting transition in conductivity between semiconducting and metallic states. Films…
Abstract The synthesis of a new generation of high‐capacity oxidation‐resistant ion‐exchange resins and membranes is described which are sulfonic acid polyelectrolytes prepared from high molecular weight poly‐α,β,β‐trifluorostyrene. The difficult sulfonation of poly‐α,β,β‐trifluorostyrene is discussed in terms of the…
The occurrence of volume diffusion during anodic dissolution of Cu‐Au alloys at room temperature is shown again by x‐ray and electron diffraction, confirming the result of a previous study. After dissolution the intensity of the diffracted x‐rays is increased at Bragg angles, θ, corresponding to intermediate Cu‐Au com…
A re-determination of the crystal structure of platinum phthalocyanine has shown that there are two closely similar structures, both differing from that published by Robertson and Woodward. The basal projection of the original structure agrees with those of the two structures here described, but the space groups and t…
Abstract Star‐shaped macromolecules have been obtained by anionic block copolymerization of a monofunctional monomer and a divinyl compound with cumylpotassium or butyllithium as initiator. The polymer molecule is a crosslinked nodulus, to which n linear, solvated chains are attached. The shielding effect of these cha…
Shear stress/shear strain curves for nickel single crystals containing 9 ppm hydrogen (0.045 at.-%) have been compared with those of hydrogen-free crystals over the range −196 to 100°C. The presence of hydrogen causes serrated yielding of the nickel and an increase in the shear stress τIII between − 125 and 0° C, but…
The electric field and potential distribution in the gap between a cylindrical rod having a hemispherical tip and an infinite plane perpendicular to the cylinder axis was determined using a charge simulation technique. This method assumes a charge at the center of the hemisphere and a finite number of semi-infinite ax…
Abstract It is shown that the application of the so‐called Drude's rule in obtaining the k ≈︁ 0 longitudinal optic mode frequencies (LO's) of multi‐resonance damped oscillators is not correct, although it may be used as an approximate method only when a few oscillators, all of appreciable strength, are present. A rigo…
Abstract The morphological character of the surface region of polyethylene has been considered with respect to adhesion and adhesive joint strength. By melting polyethylene onto a high‐energy surface (e.g., aluminum) we have provided for extensive nucleation and the formation of a transcrystalline region in the polyme…
New data are presented for single crystals of Na0.33V2O5. Conductivity along the b axis follows a dependence of the form σT = A exp( − E / kT) with E = 0.067 eV below 140°K and E = 0.057 eV above 140°K. The Seebeck coefficient changes from − 225 μV deg−1 at 70°K to − 135 μV deg −1 at 150°K; thereafter, it remains cons…
Abstract Flammability determinations have been made for epoxy resin formulations. The oxygen index, defined as the volume fraction of oxygen in an oxygen/nitrogen atmosphere that is required just to sustain steady candlelike burning of a stick of the material, has been used as the measure of flammability. The formulat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-state reactions of iron(II) hexacyanochromate(III)David Basset Brown, Duward F. Shriver, and Lyle Howard SchwartzCite this: Inorg. Chem. 1968, 7, 1, 77–83Publication Date (Print):January 1, 1968Publication History Published online1 May 2002Published inissue 1 January 1…
The heat capacity of uranium monosulfide was measured from 1.5° to 22°K by an isothermal (isoperibol) method and from 6° to 350°K by an adiabatic technique. The ferromagnetic transition at 180.1°K has a characteristic lambda shape and associated magnetic ordering entropy and enthalpy increments of 1.62 ± 0.2 cal °K−1m…
Description The papers in the Symposium on Metal Corrosion in the Atmosphere were given at the 70th Annual Meeting of the Society held at Boston, Mass., 25-30 June 1967. W. H. Ailor, Jr., Reynolds Metal Corp., and S. K. Coburn, U.S. Steel Corp., were the co-chairmen of this symposium sponsored by Committee G-1 on Corr…
The Symposium on Applications Related Phenomena in Titanium Alloys was presented 18-19 April 1967 in Los Angeles, Calif. ASTM Committee B10 on Reactive and Refractory Metals and Alloys sponsored the symposium. Hans Conrad, University of Kentucky, was the
The preparation and spectral and magnetic properties are reported for complexes of cobalt(II), nickel(II), and copper(II) with 2-methylimidazole (Mlz). The complexes (Mlz)2CoX2(X = Cl, Br, or I), (Mlz)2NiX2(X = Br or I), and (Mlz)2CuX2(X = Cl or Br) have tetrahedral structures whereas (Mlz)2NiCl2 has a polymeric octah…
Mössbauer spectra of compounds having the general formulae bis(1, 2-cyclohexanedione dioxime) iron (II) XY and phthalocyanineiron(II)(Z)2, where X, Y, Z represent ligands at the axial positions, have been measured at 77°K and in some cases at room temperature. The spectra consist of quadrupole-split doublets, from whi…
Abstract The spectrum of the fundamental absorption and reflection of n‐type InSe single crystals is studied in the energy region 1 to 5 eV and in the temperature range 293 to 90 ° K. In the spectrum an absorption is observed which may be related to direct and indicrect interband transitions. The main parameters chara…
The preparation and magnetic susceptibilities over the temperature range 80–300°K of eighteen iron(III)–Schiff base chloro- or bromo-complexes are reported. The complexes fall into two groups, uninuclear and binuclear. The magnetic data for the binuclear complexes have been interpreted by use of the dipolar coupling a…
Potentiodynamic polarization experiments were performed in 0.1 N hydrochloric acid and in 1 N sodium chloride with austenitic alloys containing 18 to 20% Cr, 13 to 39% Ni, 0 to 5% Mo, and balance Fe. The pitting potentials varied consistently with alloy content and correlated well with the results of exposure tests in…