The dielectric relaxation spectrum of glass
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Materials Literature
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Further Studies on the Anodic Corrosion of Lead in H[sub 2]SO[sub 4] Solutions
Anodic corrosion of lead in sulfuric acid was studied in detail at potentials near the reversible potential. Results indicate that the first step in the corrosion process was reaction of lead with water to form lead dioxide. The solid‐phase reaction probably occurred below a certain potential, and this reaction plus t…
Improvement of bonding properties of polyethylene
Abstract If the surface of a polyethylene film is subjected to certain treatments, printing on the surface becomes possible, or, in other words, the bonding properties of the polyethylene film are improved. Two forms of treatment, involving the use of a Tesla coil discharge at atmospheric pressure and of a glow discha…
Experimental Test of the Theory of Penetration by Metallic Jets
Experimental measurements of jet velocity and of penetration velocity as functions of depth of penetration are described for lined cavity charges fired into several types of target material and under a variety of experimental conditions. The results show that the hydrodynamic theory of penetration of Pugh and of Hill,…
THE CRYSTAL STRUCTURE OF AMMONIA-BORANE, H3NBH3
Recently Shore and Parry described a new compound, H_3NBH_3, and as evidence of crystallinity they outlined its X-ray diffraction powder pattern. From these data it has proved possible to determine its crystal structure
Reactions Between Aluminum Oxide and Carbon The Al 2 O 3 —Al 4 C 3 Phase Diagram
A phase diagram of the system A1 2 O 3 ‐A1 4 C 3 is proposed. Two intermediate oxycarbides, A1 4 O 4 C and A1 2 OC, were established. Eutectic melting between alumina and A1 4 O 4 C occurred at 1840° C. No other low melting was observed. The alumina phase was not corundum but was similar to delta‐alumina. Because of t…
Remarques sur la théorie des propriétés magnétiques des couches minces et des grains fins
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Formation of Composite Scales Consisting of Oxides of Different Metals
This paper presents a theoretical analysis of diffusion processes during the oxidation of an alloy when oxides of different alloying elements are formed concurrently. For idealized conditions it is possible to calculate the decrease in the oxidation rate which results from alloying a base metal, having a relatively hi…
Pyrochlore-type compounds containing double oxides of trivalent and tetravalent ions
A study has been mad e by X-ray diffract ion analyses of t he A20 3 :2B02-type double oxides. It was found that many of t hese mixed oxides, after appropriate heat treatment, formed compounds of the formula type A2B20 7 Most of these compounds crystallized in the cubic system with a face-centered cell similar to that…
Pitting Corrosion of 18Cr-8Ni Stainless Steel
I . Factors controlling pitting corrosion and laboratory methods used for its study are reviewed. An electrolytically accelerated test was developed for investigation of pit initiation. A controlled direct current was passed through a cell whose anode was the stainless steel specimen and whose electrolyte was the pitt…
746. Magnetic studies with copper( II ) salts. Part I. Anomalous paramagnetism and δ-bonding in anhydrous and hydrated copper( II ) acetates
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Solid State Physics: Advances in Research and Applications
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Liquid-crystalline structures in solutions of a polypeptide
BY CONMARROBINSON BY CONMARROBINSON Research Laboratory, CourtauIds Ltd., Maidenhead, Berks Receired 29th June, 1955 The birefringent solutions of poly-y-benzyl-L-glutamatein several solvents have been studied. These show parallel equidistant lines which are visible even in natural light. The periodic
Variantes en la prefabricación de pasta cerámicas
Ventajas del método de prensado en seco en la industria cerámica. Consideraciones sobre la cocción a temperatura baja.
Empleo de ladrillos refractarios aislantes en los hormigones cerámicos intermitentes
Interés del empleo de ladrillos refractarios aislantes en la construcción, de hornos cerámicos con el f in de tener una mayor economía de combustible, un aumento de la producción, mejor calidad de las piezas y reducción en el coste de construcción.
Placas coloreadas de fibrocemento
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Burning cement in air-suspension
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Empleo de flutox para la protección de hormigón
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New lime kiln safety device
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Construcción y reparación de hornos rotatorios
El empleo de la soldadura facilita la reparación de los hornos rotatorios, acortando el tiempo necesario para dicha operación. Se presentan diversos ejemplos prácticos.