Materials Literature
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The melting and crystallization of tetragonal phosphorus pentoxide has been investigated by the use of a microscopic technique. Superheating of about 50° above the melting temperature was possible. Melting was heterogeneous and began only at free surfaces or grain boundaries but never within a crystal. At a supercool…
An accurate electrochemical technique for the removal of extremely thin (10–1000 Å) uniform layers of metal from a tungsten target has been developed analogous to that used previously for range studies in aluminum. This technique has been used to obtain the range distributions of Xe 133 and Ar 41 ions in rolled tungst…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of the Thermal Decomposition of Calcium Dihydrogen PhosphideLouis L. Pytlewski and Eugene R. NixonCite this: Inorg. Chem. 1963, 2, 4, 763–764Publication Date (Print):August 1, 1963Publication History Published online1 May 2002Published inissue 1 August 1963https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkoxychlorosilanes and Alkoxysilanes Containing Silane HydrogenOlgierd J. KlejnotCite this: Inorg. Chem. 1963, 2, 4, 825–828Publication Date (Print):August 1, 1963Publication History Published online1 May 2002Published inissue 1 August 1963https://pubs.acs.org/doi/10.1021/i…
Thermal‐expansion measurements were made in an air atmosphere to 2200°C on polycrystalline single‐phase ceramic oxides. Specimens were fabricated by hot‐pressing, slip casting, and isostatic pressing. Magnesium oxide was tested in both air and argon; calcium oxide as well as magnesium aluminate and aluminum oxide spec…
Crystallographic analyses of dislocation networks in annealed b.c.c. iron observed in the electron microscope have been carried out by applying the kinematical theory of electron diffraction contrast at dislocations and Frank's formula for determining the dislocation content of a grain boundary from a crystallographic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen-Halogen Exchange between Silanes and Triphenylmethyl HalidesJoyce Y. Corey and Robert. WestCite this: J. Am. Chem. Soc. 1963, 85, 16, 2430–2433Publication Date (Print):August 1, 1963Publication History Published online1 May 2002Published inissue 1 August 1963https:/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyexomethylene Small-Ring Hydrocarbons: Tetramethylenecyclobutane and DihydrotetramethylenecyclobutaneG. W. Griffin and L. I. PetersonCite this: J. Am. Chem. Soc. 1963, 85, 15, 2268–2273Publication Date (Print):August 1, 1963Publication History Published online1 May 2002Pu…
The Jander, Dünwald‐Wagner, and Ginstling‐Brounshteǐn equations for isothermal reaction kinetics are discussed and compared directly. A table of α (fraction of total material reacted) versus Kt (product of isothermal reaction constant and time) is given for each of the three equations. In order of decreasi…
The concept of lamellar, crystalline polymers with molecular ends and comonomer components included in the crystal lattice as defects has been used to derive a relationship between first-order transition temperature, comonomer content, molecular weight, and lamellar thickness. The relationship is reduced to equations…
Abstract N‐Alkyl quaternary ammonium compounds inhibit the acid corrosion of steel, the effectiveness increasing regularly with alkyl chain length between 4 and 16 carbon atoms. The inhibition obtained with the longer chain compounds shows considerable persistence after treated samples are transferred to a pure acid b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBatch and Continuous Thickening. Basic Theory. Solids Flux for Rigid SpheresP. T. Shannon, Elwood Stroupe, and E. M. ToryCite this: Ind. Eng. Chem. Fundamen. 1963, 2, 3, 203–211Publication Date (Print):August 1, 1963Publication History Published online1 May 2002Published ini…
Abstract Deuterated analogs of polyvinyl chloride (PVC) have been prepared and their infrared spectra analyzed as an aid to the more detailed assignment of bands in the spectrum of PVC. The following deuterated polymers were studied: PVC‐α d 1 , PVC‐β d 1 , PVC‐αβ d 2 , and PVC‐ d 3 . These, as well as PVC, were polym…
The normal tungstates (R2O3·3WO3) of all rare-earth elements have been prepared as well as the 1:1 oxytungstates (R2O3·WO3) of all except Sc and Ce. Physical properties were studied with particular emphasis on luminescence.
An applied field of 105 V/cm produces electron emission from apparently smooth surfaces at room temperature. It is found experimentally that this prebreakdown emission is independent of emitter temperature up to 1000°K. Using a shadow electron microscope, projections about 2 μ high capable of producing field enhanceme…
It is shown that the bond length of an SO bond and the bond angle of an SO 2 group may be very satisfactorily correlated with the SO stretching frequency. The bond-length – stretching-frequency relationship is used to predict some bond lengths that have not been measured and the OSO angles in some sulphuryl compounds…
The "shell model" of an alkali halide is extended to take into account short-range forces between both first- and second-nearest neighbor atoms in the crystal, the polarizability of both ions, and the possibility that the ionic charge may be less than one electronic charge. The arbitrary parameters of the model have b…
The disordered structure above the Curie temperature (about 160°C) of NaNO 2 was studied by the X-ray diffuse scattering. The observed diffuse scattering, the satellites or the diffuse maxima and the plate-like diffuse scattering normal to the b * axis around them, can be interpreted on the basis of a certain disorder…
The relative phosphorescence to fluorescence quantum yields and phosphorescence lifetimes of naphthalene have been measured in a number of glassy media, some of which contain perturbing atoms of large atomic number. The intersystem crossing process S′→T is very sensitive to external heavy-atom perturbation. It is show…
Abstract The growing interest in the use of CO2 in crude oil recovery increases the need for data on the effect of CO2 on hydrocarbon physical properties. Data are presented on the solubility of CO2 in various dead oils, the swelling changes in CO2 -oil solutions and the effect of CO2 on dead oil viscosity. This later…