Pseudoternary system calcium oxide-monocalcium aluminate(CaO.Al2O3)-dicalcium ferrite(2CaO.Fe2O3)
Pseudoternary System Calcium
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Inhibition of Foaming. IX. Changes in the Rate of Attaining Surface Tension Equilibrium in Solutions of Surface-active Agents on Addition of Foam Inhibitors and Foam Stabilizers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInhibition of Foaming. IX. Changes in the Rate of Attaining Surface Tension Equilibrium in Solutions of Surface-active Agents on Addition of Foam Inhibitors and Foam StabilizersSydney Ross and R. M. HaakCite this: J. Phys. Chem. 1958, 62, 10, 1260–1264Publication Date (Print…
Microwave and Low-Frequency Oscillation Due to Resonance Instabilities in Ferrites
Received 12 September 1958DOI:https://doi.org/10.1103/PhysRevLett.1.239©1958 American Physical Society
Effect of Oxide Additions on Sintering of Magnesia
The effect of transition metal, alkali, alkaline‐earth, and heavy metal oxide additions on the sintering of magnesia was determined by measuring bulk density and shrinkage. Polished specimens were made on selected compositions and the grain structure was photographed. The unusual effect of titanium, zirconium, silicon…
Wetting of Polymer Surfaces. I. Contact Angles of Liquids on Starch, Amylose, Amylopectin, Cellulose and Polyvinyl Alcohol
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWetting of Polymer Surfaces. I. Contact Angles of Liquids on Starch, Amylose, Amylopectin, Cellulose and Polyvinyl AlcoholB. Roger Ray, J. R. Anderson, and J. J. ScholzCite this: J. Phys. Chem. 1958, 62, 10, 1220–1227Publication Date (Print):October 1, 1958Publication Histor…
Thin Film Magnetization Reversal by Coherent Rotation
Several theoretical analyses of the process of magnetization reversal in thin films by coherent rotation of the magnetization vector have been published. However, these analyses suffer from the use of questionable assumptions and from a lack of generality. This paper presents results obtained by employing an electroni…
Polymeric Peroxide of 1,3-Butadiene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymeric Peroxide of 1,3-ButadieneC. T. Handy and H. S. RothrockCite this: J. Am. Chem. Soc. 1958, 80, 19, 5306–5308Publication Date (Print):October 1, 1958Publication History Published online1 May 2002Published inissue 1 October 1958https://pubs.acs.org/doi/10.1021/ja01552…
The Corrosion Resistance of Ductile Iron
The internal structure of ordinary grey iron, pearlitic ductile iron, ferritic ductile iron, malleable iron and mild steel are compared. Differences in the amount of carbon present and in the form in which it occurs are responsible for some differences in the corrosion behavior of these materials. This is explained on…
The Ammonia Oxidation Process for Nitric Acid Manufacture
It is little more than fifty years since the first manufacture of nitric acid by the oxidation of ammonia over a platinum catalyst. Ostwald’s original industrial plant had an output of some 100 tons of acid a year; today the world capacity for nitric acid manufacture by this process is about ten million tons a year. T…
Organoboron Compounds. VIII. Dihydrobenzoboradiazoles1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganoboron Compounds. VIII. Dihydrobenzoboradiazoles1Robert L. Letsinger and Stephen B. HamiltonCite this: J. Am. Chem. Soc. 1958, 80, 20, 5411–5413Publication Date (Print):October 1, 1958Publication History Published online1 May 2002Published inissue 1 October 1958https://…
The Magnetic Properties of the Cobalt Oxide–Alumina System
ADVERTISEMENT RETURN TO ISSUEArticleNEXTThe Magnetic Properties of the Cobalt Oxide–Alumina SystemJ. T. Richardson and L. W. VernonCite this: J. Phys. Chem. 1958, 62, 10, 1153–1157Publication Date (Print):October 1, 1958Publication History Published online1 May 2002Published inissue 1 October 1958https://pubs.acs.org/…
Antireflection Coatings for Germanium and Silicon in the Infrared*
Very hard and durable single layer antireflection coatings for Ge and Si have been made which result in a peak transmittance of better than 98% at any desired wavelength in the infrared up to about 15μ. Silicon monoxide makes an excellent antireflection coating for silicon and germanium in the near infrared, but canno…
The nephelinekalsilite system; II, Phase relations
Phase equilibrium studies in the system NaAlSiO ~4~ -KAlSiO ~4~ at subsolidus temperatures have demonstrated that a solvus, or miscibility gap, is present and in a general way it is similar to the solvus between albite and orthoclase. At low temperatures the miscibility gap extends in composition from Na ~3~ KAl ~4~ S…
Molecular Motion in Polypropylene, Isotactic and Atactic
Molecular order and motion in isotactic and atactic polypropylene molecules have been studied by proton magnetic resonance methods over the temperature range 77–400°K, and by x-ray diffraction. It is shown that some motion persists at the lowest temperatures, and becomes pronounced in the temperature interval 77–110°K…
Theoretical Values of the Dynamic Stretch Moduli of Fiber-Forming Polymers
Employing concepts first applied to textile fibers by Meyer and Lotmar in calculating the elastic stretch modulus of the crystalline domain of cellulose, the moduli of crystalline polyhexamethylene adipamide (α form), and polyethylene terephthalate have been derived. The treatment employs interatomic force constants f…
Notes - Base Strengths of Some Alkylhydrazines
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNotes - Base Strengths of Some AlkylhydrazinesRichard HinmanCite this: J. Org. Chem. 1958, 23, 10, 1587–1588Publication Date (Print):October 1, 1958Publication History Published online11 June 2003Published inissue 1 October 1958https://pubs.acs.org/doi/10.1021/jo01104a629htt…
The magnetization of cobalt-aluminium, cobalt-silicon, iron-aluminium and iron-silicon alloys
The rate of change of magnetic moment with composition in several ferromagnetic cobalt-rich and iron-rich alloys of these systems has been derived from measurements of the variation of spontaneous magnetization with temperature. The measurements were made on the high-temperature face-centred cubic phase of the cobalt…
Adiabatic Elastic Moduli of Single Crystal Alpha-Uranium
The adiabatic elastic moduli at 25°C for single crystal alpha-uranium are reported here as derived from measurements of high-frequency ultrasonic wave velocities. A detailed description is given of the specimens used, and of the technique employed for obtaining small plates of proper orientation suitable for the probl…
Dependence of the ultimate properties of a GR‐S rubber on strain rate and temperature
Abstract The tensile properties of an unfilled GR‐S rubber were measured with an Instron tensile tester at strain rates between 0.158 × 10 −3 and 0.158 sec. −1 and at fourteen temperatures between −67.8 and 93.3°C. The tensile strength and ultimate strain at the various strain rates and temperatures were superposed to…
Thermal Expansion of Some Crystals with the Diamond Structure
The linear coefficient of thermal expansion of silicon, germanium, and indium antimonide has been measured in the range 4.2\ifmmode^\circ\else\textdegree\fi{}K-300\ifmmode^\circ\else\textdegree\fi{}K using an interferometric method. In the cases of silicon and germanium, these values are used to calculate the variatio…