Materials Literature
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Power factor, loss factor, dielectric constant, volume resistivity, surface resistance, and dielectric strength of epoxies, varying in viscosity and reactivity and cured with several types of hardeners, have been determined and form the basis for this report. The effect of cure, temperature, and frequency on electrica…
The anisotoropy of the galvanomagnetic effects in the single crystals of pure bismuth was investigated at the temperatures between -160° and 45°C. The results were analysed by the phenomenological theory of the galvanomagnetic effects. Two components of the resistivity tensor, two components of the Hall tensor, eight…
Abstract A method is presented for the analysis of a reaction between a porous solid and a gaseous reactant where the kinetic expression is linear in the concentration and where appreciable concentration gradients are established in the pore system as a result of diffusive transport rate. Two cases are treated mathema…
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Samples of both $n$-type and $p$-type ${\mathrm{Bi}}_{2}$${\mathrm{Te}}_{3}$ containing from 3\ifmmode\times\else\texttimes\fi{}${10}^{17}$ to 5\ifmmode\times\else\texttimes\fi{}${10}^{19}$ extrinsic carriers were prepared and the phase diagram in the region about ${\mathrm{Bi}}_{2}$${\mathrm{Te}}_{3}$ has been clarif…
Abstract The results reported in part I, together with similar results for sodium chloride, have been analyzed in terms of the spectrum of harmonic vibrations of the crystalline lattice; since the zero-point energy proves to be small, the analysis should conform fairly closely to that of a static lattice. ʘ0 and the c…
The resistivity change induced by electron irradiation of zone-refined copper maintained at \ensuremath{\sim}10\ifmmode^\circ\else\textdegree\fi{}K has been measured over the range of bombarding electron energies from 0.70 to 1.37 Mev. The cross section for damage production is shown to be insensitive to the choice of…
The collapse of foams produced under controlled conditions by bubbling carbon dioxide through beer has been studied with particular reference to the rate at which liquid separates from them. If the volumes of the sample and of the foam produced from it are suitably adjusted, liquid is found to separate at a logarithmi…
The general chemical composition of untreated fibers of hemp, jute. and kapok has been studied, and the results have been compared to the composition of the corresponding α-celluloses and of the cellulose nitrates obtained by direct nitration of the original materials. After correction for nonglucose sugar residues, t…
An alloy of high magnesium content, 0.008 to 0.1% beryllium and 0.25% alumninum, is reported. Calcium may aleo be present (0.02 to O.44%). The alloys could be melted in their oxide skin in air without taking fire, e.g., for aircraft landing mats. (auth)
The existing literature pertaining to the use of sulfonates as corrosion inhibitors is reviewed briefly. An account is given of radiometric adsorption and desorption studies made of sodium and amine salts of sulfonic acids. Corrosion inhibitor studies also were made of these salts in H2S and CO2 environments; some of…
The use of sodium silicate as a corrosion control agent for open-recirculating cooling water systems is discussed. Emphasis is placed on the results of tests made with low-carbon steel coupons in eight operating plants. The normal development of silica films, effect of prior corrosion and the influence of pH, water te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFree Energy of Immersion of Compressed Powders with Different Liquids. II. Silica PowderJ. J. Van Voorhis, R. G. Craig, and F. E. BartellCite this: J. Phys. Chem. 1957, 61, 11, 1513–1519Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCuring Process in Phenolic Resins Electron-Microscopic AnalysisRobert A. Spurr, Edward H. Erath, Howard. Myers, and Daniel C. PeaseCite this: Ind. Eng. Chem. 1957, 49, 11, 1839–1842Publication Date (Print):November 1, 1957Publication History Published online1 May 2002Publish…