Materials Literature
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All articles of this category This review describes the synthetic approaches to tetrathiafulvalenes (TTF) and their selenium analogs-tetraselenafulvalenes (TSeF). Synthetic methods are conveniently classified according to the general mechanistic paths found in the literature. Preparation of the precursors of tetrathia…
The effect of different modes of co-ordination on the i.r. spectrum of the acetate ion is reviewed. Infrared and 1H n.m.r. spectra of a series of metal acetates and acetato-complexes are reported. and the type of co-ordination identified: B2O(O2CMe)4 and Na[B2O(O2CMe)5] contain both bridging and unidentate acetate; Al…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConvenient preparation and physical properties of lithium intercalation compounds of Group 4B and 5B layered transition metal dichalcogenidesDonald W. Murphy, Francis J. Di Salvo, George W. Hull Jr., and Joseph V. WaszczakCite this: Inorg. Chem. 1976, 15, 1, 17–21Publication…
By means of the techniques of laser-induced fluorescence line narrowing, the emission spectrum of ${\mathrm{Eu}}^{3+}$ in a sodium-barium-zinc silicate glass, and the temporal dependence of the emission, were measured as functions of of excitation wavelength. Large variations were observed in the intensities and wavel…
A model is proposed for exchange interaction taking into account the impact of the m.o. concept in inorganic chemistry. We define four principles that such a model should follow; invariance with respect to a unitary transformation between the orbital basis functions, validity of Heitler–London wavefunctions for the lo…
All unstabilized organic polymers are degraded upon exposure to terrestrial sunlight in the presence of oxygen. However, the rates of photooxidative deterioration vary enormously with polymer structure, and range from a few months outdoor lifetime for polypropylene (PPH) and poly(l,3-phenylene isophthalamide) up to se…
A survey is given of the available cross-section data for ionization of inner-shell electrons by incident electrons in the range of interest for electron-probe microanalysis and for Auger-electron spectroscopy of solid surfaces. Owing to the paucity of data, the bulk of the discussion is limited to $K$-shell and $L$-s…
Abstract The first part of the paper deals with a brief review over the present stage of the (kinematical) theory of the broadening of X‐ray diffraction lines of crystals containing dislocation distributions. In the second part experiments of X‐ray line broadening of plastically deformed Cu and NaCl single crystals ar…
A number of iodine compounds are studied as solids, in particular some iodine-oxygen and iodine-chlorine compounds and the tri-iodide ion. The chlorine 2p electron binding energy for I2Cl6 can be resolved into two peaks of intensity ratio 2:1 corresponding to terminal and bridging chlorine atoms. The iodine 3d electro…
X-ray photoelectron spectroscopy has been used to determine the oxidation state of copper in various kinds of copper minerals. Cuprite Cu2O is found to be stable to air oxidation. Photoelectron spectra of carrollite Co2CuS4, germanite Cu3(Ge, Fe) (S, As)4 and covelline CuS reveal that these minerals contain univalent…
In a composite material consisting of a piezoelectric and a piezomagnetic phase which are mechanically coherent, electric and magnetic fields are converted into each other by a two-step process involving mechanical deformation as the intermediate step. We have developed such a material on the basis of a Co ferrite-Ba…
The electrical resistivity of ZnO doped with Al 2 O 3 was measured in air and under reduced pressure (∼0.5 mm Hg) in the range from 30° to 680°C as a function of the degree of sintering. The data obtained were explained in terms of the effects of the microstructure of the sintered body and the chemisorbed oxygen. Ther…
Research Article| September 01, 1976 Kinetics of illite formation DENNIS EBERL; DENNIS EBERL 1Department of Geology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 Search for other works by this author on: GSW Google Scholar JOHN HOWER JOHN HOWER 2Department of Geology, Case Western Reserve Univers…
A method is proposed to determine design forces for earthquake-resistant design of reinforced concrete structures. The method uses a modified linear model of the structure and recognizes the effect of energy dissipation in the nonlinear range of response. Thus, the designer is provided with a procedure, at the level o…
By means of dielectric measurements and a Raman-scattering experiment, the uniaxial stress dependence of the ferroelectric and structural phonon modes in SrTi${\mathrm{O}}_{3}$ crystal has been studied at liquid-helium temperature. The ferroelectric phase transitions were induced by a stress normal to the (100) or (11…
We discuss the equilibrium properties of flexible chains adsorbed on a flat surface, assuming that a) adsorption is weak, resulting in large thicknesses D for the adsorption layer, b) the chains are very long, c) the solvent is good, so that excluded volume effects become important (contrary to an early opinion of Hoe…
Papers are presented concerning hydrogen for energy, effects of internal hydrogen, effects of hydrogen-producing environments, effects of external hydrogen, hydrogen transport, hydride-forming materials engineering applications, and hydrogen research. Thirty-six of the papers were individually abstracted. (JRD)
A method was developed to determine the kinetic parameters controlling structural relaxation in the glass transition region from data acquired during continuous heating or cooling. The nonexponential character of the relaxation is accounted for by assuming an equilibrium isothermal relaxation function of the form exp…
The fracture toughness of Al 2 O 3 is considerably increased by the incorporation of fine monoclinic ZrO 2 particles. Hot‐pressed composites containing 15 vol % ZrO 2 yield K lc values of ∼ 10 MN/m 3/2 , twice that of the A1 2 O 3 matrix. It is hypothesized that this increase results from a high density of small matri…
Measurements of the dielectric constant κ in high-purity BaTiO3 ceramics as a function of temperature show that κ is quite dependent on grain size in the ferroelectric state while it is almost independent of grain size in the paraelectric state. In the ferroelectric orthorhombic and rhombohedral phases, κ decreases ra…