Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Function of Fluxes in the Preparation of Infrared Sensitive Phosphors of the Alkaline Earth Sulfides and Selenides1,2William Primak, R. Keith Osterheld, and Roland WardCite this: J. Am. Chem. Soc. 1947, 69, 6, 1283–1287Publication Date (Print):June 1, 1947Publication His…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe System CaO-SiO2-H2O and the Hydration of the Calcium Silicates.Harold H. SteinourCite this: Chem. Rev. 1947, 40, 3, 391–460Publication Date (Print):June 1, 1947Publication History Published online1 May 2002Published inissue 1 June 1947https://pubs.acs.org/doi/10.1021/cr6…
Abstract Since the permeability of rubberlike substances to gases is related to the solubility and rate of diffusion of the gases in those materials, these individual values should be known. The permeability of a membrane was measured manometrically and the diffusivity was derived from the time lag of the permeation.…
An interference filter of the reflection type consists in its simplest form of a perfectly reflecting mirror on which is placed a thin layer of a dielectric material. The outer surface of the dielectric is coated with a very thin metallic film. When properly constructed such a filter reflects 100 percent of radiation…
A theory of oriented crystallization in elongated polymers having network structures (e.g., in vulcanized rubber) is developed through the application of statistical mechanical procedures similar to those employed in rubber elasticity theory. Expressions are derived which, within the limitation imposed by the simplify…
Abstract A survey (is presented) of the work of the Corrosion Research Section of Chemical Research Laboratory (Department of Scientific and Industrial Research), Teddington, since 1939. The topics discussed include the “high‐speed rotor apparatus” for accelerated immersed corrosion tests; the investigation of high‐du…
It cannot be denied that our elementary discussions of the principal phenomena connected with surface tension and capillarity are often vague and unsatisfying. The simple statics of the systems dealt with are frequently obscured and circumvented by the introduction of the concept of free surface energy to replace surf…
Abstract Following an historical introduction, a short survey is given of the chemical properties of trimethylamine oxide. The results of determinations of the content of trimethylamine oxide in Norwegian marine products, as well as results of investigations of the fate of trimethylamine oxide during bacterial decompo…
One factor influencing the suitabilty of fabrics for clothing is resistance to the passage of water vapor. Measurement of the low resistances of woven fabrics requires a different technique from that for the high resistances of waterproofing and packaging materials, since the resistances are close to that of air itsel…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Richard A. Ogg; The Mechanism of Nitrogen Pentoxide Decomposition. J. Chem. Phys. 1 May 1947; 15…
Abstract Es wurden die folgenden Spinelle zum Teil erstmalig hergestellt und auf ihre Struktur hin untersucht: MgV 2 O 4 , ZnV 2 O 4 , Mg 2 VO 4 , 3ZnO · 4VO 2 , MgCr 2 O 4 , ZnCr 2 O 2 , MgRh 2 O 2 , ZnRh 2 O 4 und CdGa 2 O 4 . Von diesen Spinellen besitzen nur die beiden Vanadin(1V)‐Spinelle Mg 2 VO 4 und 3ZnO·4VO 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal Structure of Sodium BorohydrideA. M. SoldateCite this: J. Am. Chem. Soc. 1947, 69, 5, 987–988Publication Date (Print):May 1, 1947Publication History Published online1 May 2002Published inissue 1 May 1947https://pubs.acs.org/doi/10.1021/ja01197a002https://doi.org/10.1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThin Oxide Films on Aluminum.Earl A. Gulbransen and W. S. WysongCite this: J. Phys. Chem. 1947, 51, 5, 1087–1103Publication Date (Print):May 1, 1947Publication History Published online1 May 2002Published inissue 1 May 1947https://doi.org/10.1021/j150455a004RIGHTS & PERMISSIO…
In this paper, effort is directed toward explaining various diverse luminescent properties of solids in terms of a simple model of potential energy versus configuration coordinate. Three states of different multiplicities—a normal, metastable and an emitting state—are involved. The luminescent process consists of the…
Abstract A theory is given of the break-up of the metal case of a cylindrical ring-bomb, in which the lines of fracture perpendicular to the axis of the bomb are predetermined. From the theory an expression is given for the length of the average fragment; this is shown to depend, if certain hypotheses are made, on the…
The structure of the electronic energy bands and Brillouin zones for graphite is developed using the "tight binding" approximation. Graphite is found to be a semi-conductor with zero activation energy, i.e., there are no free electrons at zero temperature, but they are created at higher temperatures by excitation to a…
Abstract Barium titanium oxide, which is tetragonal at room temperature, changes about 120° C to a cubic structure. This change has been followed in detail by means of X-ray powder photographs taken in a 19 cm. powder camera at intervals of a few degrees over a range covering the transition point. The unit cell, whic…
The mechanical behavior of grain boundaries in metals has been a subject of constant controversy. The present research is designed to examine thoroughly the mechanical behavior of grain boundaries in metals in a quantitative manner. A simple torsional apparatus has been devised for measuring four types of anelastic ef…
A bstract The surface tension of a number of optical glasses made at the National Bureau of Standards was measured by a modification of the anchor ring method. The values for the flint glasses at 1300 °6, were in the range 210 to 230 dynes per cm., the barium crowns ranged from 260 to 310, while the other types of gla…
Abstract Durch die Überlegungen in Kap. 1 wird zunächst festgestellt, daß die Coulombsche Abstoßung das Verhalten des "Fermi-Gases" der Leitungselektronen im Metall entscheidend beeinflußt. Zwar spielt diese Abstoßung keine allzu wichtige Rolle für die Elektronen, deren Energie kleiner ist als die Grenzenergie des Fer…