Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of activated carbon by thermal decomposition of used automotive tiresSadao Ogasawara, Mikiya Kuroda, and Noriaki WakaoCite this: Ind. Eng. Chem. Res. 1987, 26, 12, 2552–2556Publication Date (Print):December 1, 1987Publication History Published online1 May 2002Pub…
Domain splitting in the grains of ferroelectric ceramics reduces the internal elastic stresses which are caused by spontaneous deformation. Hysteresis switching reflects the increase or absence of internal stress. Small signal elastic and electric ac fields applied to the ceramic cause reversible domain wall motion th…
Nickel oxide ( NiO ) cathode solubility in the molten carbonate fuel cell (MCFC) electrolyte has been identified as one of the major technical obstacles facing fuel cell commercialization. The solubility of transition metal oxides is thought to be a function of the acid/base chemistry of the melt, controlled by the CO…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIn situ photoreduced silver nitrate as a substrate for surface-enhanced Raman spectroscopyAngela M. Ahern and Robin L. GarrellCite this: Anal. Chem. 1987, 59, 23, 2813–2816Publication Date (Print):December 1, 1987Publication History Published online1 May 2002Published inissu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBimetallic lanthanide complexes of the calixarenes: europium(III) and tert-butylcalix[8]areneBrenda M. Furphy, Jack M. Harrowfield, David L. Kepert, Brian W. Skelton, Allan H. White, and Faye R. WilnerCite this: Inorg. Chem. 1987, 26, 25, 4231–4236Publication Date (Print):De…
After briefly summarizing the most common reactions used in the chemical synthesis of polyoxyphenylenes, this paper reviews the electrochemical polymerization of phenols for metal protection. It also describes how the reaction media, sometimes in unexpected ways, influence the chemical composition of the coatings and…
A new method for the acid hydrolysis of protein is presented. Peptide bonds are cleaved by the action of an HCl/trifluoroacetic acid (TFA) vapor mixture. Contamination for the hydrolysis mixture is reduced to low levels (1-3 pmol). Recovery of hydrophobic amino acid is improved. Short reaction times are achieved and r…
The Stoner model of itinerant ferromagnetism in combination with self-consistent linear muffin-tin orbital non-spin-polarized calculations are used for analysis of metamagnetic behavior of fcc iron. The developed procedure enables one to identify all the possible ferromagnetic phases (stable, metastable, and unstable)…
A 104- to 105-times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence-lifetimes in H2O and D2O it can be deduced that in Eu nine or ten H2O molecules coordinate the Eu3⊕ ion, whereas…
Structural and electrical properties of rf-sputtered amorphous BaTiO3 thin films grown on water-cooled substrates have been investigated. The dielectric and electrical properties have been studied for films grown under varying sputtering gas composition (Ar+O2 gas mixtures) as a function of film thickness, frequency,…
The theory underlying the steady-state photocarrier grating technique is presented, including the effect of surface recombination. Experimental results for amorphous hydrogenated silicon and semi-insulating GaAs prove that diffusion lengths ranging from 200 Å to 10 μm can be measured with an accuracy of better than 5%.
The dissolution kinetics of TiO 2 powders in HF‐HCl solutions was studied as a function of time, temperature, and acid concentration. The rate of dissolution was linear with time, directly proportional to [HF], independent of [HCl], and exhibited an exponential temperature dependence with an activation energy of 74.9…
The zero-temperature value of the magnetocrystalline anisotropy (MCA) energy of trivalent rare-earth ions and its temperature dependence have been calculated for the whole series of the ${R}_{2}$${\mathrm{Fe}}_{14}$B compounds. The computations, performed with a single-ion origin of the anisotropy and within a molecul…
A dependence of the electric strength on thickness, area and volume of dielectric is demonstrated for polypropylene film. It is found that the electric strength of theoly polymer film decreases with volume. It is shown that theunc function of electric strength is not simply dependent on the volume as obtained from the…
A deterministic growth process, based on the solution of the lattice Laplace equation for the temperature field, is introduced for modelling pattern formation in dendritic solidification. By a simple parameterisation of the physical and environmental conditions during crystal growth a wide variety of dendritic pattern…
The dynamics of an electron described by the one-dimensional tight-binding Hamiltonian with quasiperiodic (Fibonacci) modulation is studied numerically. The width of an initially localized wave packet is found to increase with time t in an overall power-law form \ensuremath{\sim}${t}^{\ensuremath{\alpha}}$ (0<\ensu…
The use of ultra‐high‐purity powder processing and multiple solid‐solution additive doping has been evaluated as an effective approach for the fabrication of alumina ceramics. MgO was found to inhibit grain growth more strongly in very pure powders because of its stronger solute drag effect. The degree of inhibition w…
Following a major shortage of 99Mo in the 2009–2010 period, concern grew that the aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as the target material. The Organisation for Economic Co-...Read More
Changes in the structure of nylon 6 fibers annealed in dry and wet atmospheres were studied by small-and wide-angle x-ray diffraction. In the presence of water or saturated steam, fibers can be annealed to the same strucutral state at temperatures 70°C lower than in dry atmosphere. This is due to the enhanced mobility…
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