Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCondensed System LiF-NaF-ZrF4-Phase Equilibria and Crystallographic Data.R. E. Thoma, H. Insley, H. A. Friedman, and G. M. HebertCite this: J. Chem. Eng. Data 1965, 10, 3, 219–230Publication Date (Print):July 1, 1965Publication History Published online1 May 2002Published ini…
The absorption spectrum of polycrystalline and single‐crystal magnesium oxide was determined in the 4000 to 166 cm −1 spectral region. In the range 4000 to about 1100 cm −1 , the absorption coefficient of the polycrystalline MgO was higher than that of the single‐crystal MgO owing to scattering by the grain boundaries…
The vaporization rates in vacuum of hot‐pressed HfC, TaC, and solid solutions of these carbides in the range 2225° to 2725°C were determined by a Langmuir‐type method. A composition near 80TaC.ZOHfC (mole %) exhibited the lowest vaporization rate of the compositions within this pseudobinary system. Variations in initi…
The theory is based on the assumption that the paths of all the filaments in a continuous-filament yarn are identical, except for a displacement along, and rotation about, the yarn axis. The path of the single filament is characterized by a regular periodic migration between the axis and the periphery; the form of thi…
Intergranular corrosion of nonsensitized stainless steels is reviewed, with emphasis on corrosion experienced in nitric-dichromate solutions. Electrical resistance changes occurring during corrosion of Type 304 stainless steel in nitric-dichromate solutions are used to measure the rate of intergranular attack. Effects…
The general, linearized, coupled magnetoelastic equations for arbitrarily anisotropic, magnetically saturated insulators, which were derived in a previous paper, are specialized to the important case of a homogeneous, static biasing state. The equations applicable in the special case of a material in cubic class m3m a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscosity of Glass-Forming Solvent Mixtures at Low TemperaturesHina Greenspan and Ernst FischerCite this: J. Phys. Chem. 1965, 69, 7, 2466–2469Publication Date (Print):July 1, 1965Publication History Published online1 May 2002Published inissue 1 July 1965https://doi.org/10.1…
Abstract The sorption of boron by clay minerals from natural waters has been studied experimentally. The quantity of boron sorbed per unit weight of clay mineral is dependent on both the salinity and the boron content of the solution. Previous work has shown that illite is the best clay mineral sorbent, though kaolini…
B. K. Vainshtein Translated and Edited by E. Feigl and J. A. Spink Oxford: Pergamon Press. 1964. Pp. vi + 420. Price 100s. The analysis of crystal structure by electron diffraction, particularly by the use of Fourier methods, is a subject which was originally developed in Russia, notably by Vainshtein, Pinsker and Zvy…
Measurements of the thermal conductivity, using a steady-state technique, and of the specific heat, using a transient technique, have been performed between 4.5° and 1°K on commercial samples of polytetrafluoroethylene (Teflon), polychlorotrifluoroethylene (Kel-F), nylon, and three samples of polyethylene of varying d…
Abstract An explanation is presented to account for the deterioration of the mechanical properties at very low concentrations of absorbed oxygen. The induction time as measured by the oxygen absorption technique overestimates the time to failure with respect to the mechanical properties. Furthermore, it is shown that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic Bonding and Micelle Stability1Douglas C. Poland and Harold A. ScheragaCite this: J. Phys. Chem. 1965, 69, 7, 2431–2442Publication Date (Print):July 1, 1965Publication History Published online1 May 2002Published inissue 1 July 1965https://pubs.acs.org/doi/10.1021/…
Abstract The mineralogy of the clay fractions of two soil profiles representing the end-members of a catena developed on a glacial till derived from basic lavas has been determined. Particular attention has been given to the assessment of the nature of the amorphous inorganic material in the clay fraction of these soi…
The magnitude of the linear electro-optic effect at 5461 Å in single-crystal barium titanate has been determined in the temperature range from 5° to 120°C. The low-frequency or stress-free values were obtained for r42 and rc = r33 − (na/nc)3r13. The polarimetric measurement did not separate r33 from r13. The quantity…
During the creep of magnesium, cavities form on some grain boundaries, limiting the ductility of the material and causing its density to decrease. It is shown that cavitation is eliminated if a hydrostatic pressure is superimposed which is equal to the creep stress. If the hydrostatic pressure is applied after cavitie…
Evaporated films may have different thermal expansion coefficients from their substrates. When the temperature of such a combination is changed, thermal strains are introduced into the film. Calculations of the thermal strains and strain energies for the differently oriented grains in a polycrystalline sample were mad…
A method was developed for preparing ultra‐ high‐purity submicron powders of refractory oxides from transition metal alkoxides. Compounds of the type M(OR) 3 and M(OR) 4 , where R is an alkyl group such as C 4 H 9 ‐, were thermally decomposed to oxides at 325° to 450°C at atmospheric pressure. Techniques were perfecte…
Abstract A sample of polyisoprene having a narrow molecular weight distribution has been degraded mechanically in several ways and molecular weight distributions of the degradation products have been determined. From these data we conclude that chain scission occurs at a point far removed from the ends, but not necess…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the Polymorphic Modifications of PhthalocyaninesJacques M. AssourCite this: J. Phys. Chem. 1965, 69, 7, 2295–2299Publication Date (Print):July 1, 1965Publication History Published online1 May 2002Published inissue 1 July 1965https://pubs.acs.org/doi/10.1021/j100891a026htt…
The principal thermomagnetic effects in semiconductors and semimetals are discussed, with emphasis on the physical processes which affect the transport coefficients. The Seebeck, Nernst, Righi-Leduc, Peltier, Ettingshausen and magnetothermal resistance coefficients are defined and the Kelvin-Onsager relations between…