Materials Literature
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A simple treatment of pulsed and steady-state selective-excitation experiments in multilevel systems is given and used to interpret the fluorescence excitation and decay properties of ${\mathrm{Er}}^{3+}$ in La${\mathrm{F}}_{3}$. Fluorescence from eight different excited states was studied. From excitation spectra and…
The change in hyperfine field at a central cation site when the nearest-neighbor cation sites are occupied by magnetic ions is calculated. Two mechanisms dominate this effect: one an orthogonalization of the neighboring magnetic ion's $\ensuremath{\sigma}$ orbitals to the inner $s$ shells of the central cation; the ot…
Measurements have been made of the temperature dependence of the Hall effect in the range 1-300\ifmmode^\circ\else\textdegree\fi{}K, and of the transverse and longitudinal magnetoresistance at low temperatures, in [100] and [111] iron whiskers of high purity (resistance ratios extrapolated to $B=0$ ranged from 242 to…
Abstract The sources of drilling string corrosion are discussed, together with an economic estimate of the magnitude of this problem in our drilling industry. Problems associated with measuring the corrosion rate in drilling fluids under field conditions are reviewed. A technique for making corrosion rate evaluations…
Möglichkeiten zur Verfeinerung von Gußgefüge durch Schwingungsbehandlung der erstarrenden Schmelze. Versuche mit der Erstarrungsbeschallung an Zinn, Zink und Aluminium. Schwingungsbehandlung von Stahl beim Vakuum‐Lichtbogenschmelzen, beim Elektroschlackeschmelzen, beim Stranggießen und beim Sauerstoffaufblas‐Verfahren.
For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology.
Dimethyl silicone imparted wrinkle recovery values of 250-285° to various types of fabric when the silicone was cross-linked as a film on the cotton. To enhance this effect, a small amount of cellulose cross-linking was carried out using dihydroxydimethylol ethyleneurea without added metal salt catalysts. Conditioned…
Abstract The dielectric behavior of different polar high polymers at ultra‐high frequencies has been investigated by means of a dielectrometer, suitably modified to permit measurements at different temperatures. Experimental measurements were made at about 9 × 10 9 cps over the temperature range of −150 to 200°C. for…
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 R. C. Vehse, E. T. Arakawa, and J. L. Stanford, "Normal-Incidence Reflectance of Aluminum Films in the Wavelength Region 800–2000 Å*," J. Opt. Soc. Am.…
Abstract The γ‐ray‐initiated polymerization of dimethyl itaconate was studied. Dimethyl itaconate was polymerized by γ‐irradiation at temperatures where the monomer does not polymerize thermally; so long as the monomer is kept in a liquid state, even at temperatures below the melting point, the polymerization takes pl…
The electrical conduction transients of CeO2 and ca-doped CeO2 were investigated by employing a constant-current dc power source and a six-probe high-resistance input-isolated recording system. In contrast to the observations made by Kevane et al. neither voltage-time transients nor non-Ohmic behavior were observed wh…
Abstract The presence of a higher-order phase transition at around 60–70°C in phenanthrene crystal, previously suggested by the anomalies in electrical conductivity and in thermal expansion, and by the endothermic phenomenon, has been confirmed through an X-ray powder diffraction study. The results disclose the follow…
The diffusion of several solutes in liquid silver and tin is discussed in terms of the fluctuation model, the modified critical fluctuation theory and the ‘hole’ theory of liquid diffusion, assuming the solute as a point charge equal to the difference in the charge of the solute and solvent atoms. The additional coulo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanical Foam BreakingMorris Goldberg and Eliezer RubinCite this: Ind. Eng. Chem. Process Des. Dev. 1967, 6, 2, 195–200Publication Date (Print):April 1, 1967Publication History Published online1 May 2002Published inissue 1 April 1967https://pubs.acs.org/doi/10.1021/i260022…
Abstract A series of polyaryloxysilanes was prepared from aromatic diols and dianilino‐ and diphenoxysilanes. High molecular weight polymers were obtained at temperatures of 200°C. or higher by using melt‐polymerization procedures. The polymers, which combine the structures of silicones and polyaromatics, possessed hi…
Investigations in oxide system based on tellurium oxide resulted in preparation of new compounds of the type B 3 TeO 6 (B 2+ = Mg,Mn,Ni,Cu). Mg 3 TeO 6 and Mn 3 TeO 6 are isostructural, rhombohedral, pseudo-cubic. Ni 3 TeO 6 crystallizes with the ilmenite structure, whereas Cu 3 TeO 6 obviously belongs to the D 3 5 -s…
Temperature dependence of the dielectric constant and the d.c. electrical resistivity of single crystals of NaNO 2 were measured in the vicinity of the ferroelectric Curie point under precise control of temperature. Anomalies in the dielectric constant ε 22 and the resistivity ρ 22 are seen at 163.8°C (the Curie point…
The characteristics of light emission from hydrodynamic cavitation are given. Changes were examined for small variations in water temperature, pressure, and gas content. Using oxygen, nitrogen, and xenon dissolved in water, the shapes, intensities, and pulse height spectra for individual light pulses were determined.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of (CH3)4Sn3Fe4(CO)16Robert M. Sweet, Charles J. Fritchie Jr., and Robert A. SchunnCite this: Inorg. Chem. 1967, 6, 4, 749–754Publication Date (Print):April 1, 1967Publication History Published online1 May 2002Published inissue 1 April 1967https://doi…
The magnetic susceptibilities of the compounds [bipy-H2][MnCl5], [phen- H2]-[MnCl5], [MnCl3(H2O)bipy], [MnCl3(H2O)phen], [MnF3(H2O)phen], [MnCl3 trpy], [MnCl4 bipy], [MnCl3 bipy], [MnCl3 phen], and [MnO phen2](ClO4)2,0.5H2O have been determined over the temperature range c. 100-300°K. All compounds appeared to follow…