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Barium titanate single crystals have electrical characteristics in the orthorhombic and rhombohedral phases which are similar to those observed in the tetragonal region. At a phase transition the coercivity, determined from 60 cps hysteresis loops, decreases sharply from its value at temperatures above the transition.…
Relations between the phase angles of complex structure factors (analogous to the sign relations which are known to apply for real structure factors) are derived, and their possible application to crystal-structure analysis is discussed.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalystsBenjamin H. DanzigerCite this: Ind. Eng. Chem. 1955, 47, 8, 1495–1500Publication Date (Print):August 1, 1955Publication History Published online1 May 2002Published inissue 1 August 1955https://doi.org/10.1021/ie50548a019RIGHTS & PERMISSIONSArticle Views115Altmetric-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlasticizers for Poly(Vinyl Chloride) ResinsCharles J. Knuth and Paul F. BruinsCite this: Ind. Eng. Chem. 1955, 47, 8, 1572–1578Publication Date (Print):August 1, 1955Publication History Published online1 May 2002Published inissue 1 August 1955https://pubs.acs.org/doi/10.102…
The tensile behavior of a Hookean material elongated by rapid impact at one end has been calculated, using a theory in which wave propagation is considered. As a result of these calculations, limits have been established on the applicability of a simpler theory, discussed in a preceding publication, in which wave prop…
Theoretical consideration of possible mechanisms to account for the action of inorganic corrosion inhibitors of the XO4n- type led to the discovery that the pertechnetate ion, TcO4-, inhibits the corrosion of iron and carbon steels in aerated water at temperatures from 23 to 250 C, which was the highest temperature in…
Hardenable stainless steels, like other high-strength steels, are susceptible to cracking under the combined influence of tensile stress and corrosion, depending on the severity of the stress, the nature of the media and to a large extent, on their hardness. The most severe conditions are acid solutions containing sul…
The tracer diffusion of iron in 18−8 stainless steel has been measured over a wide temperature range by the surface activity decrease method, using radioactive Fe55. The results show that the lattice diffusion coefficients can be described by the equation D=0.58 exp(−67 100/RT) cm2 sec−1. The effect of variations in g…
The magnetic domain structure of polycrystalline grain-oriented 3¼% silicon steel has been investigated by the magnetic-powder-pattern technique and the orientation of individual grains determined by the etchpit optical-goniometer technique. A semiquantitative relationship has been found between the domain patterns an…
Abstract The spherulites are built of distinct fibrillar units and their fine‐structure presents two problems: the arrangement of these units and their internal structure. In the present paper the first has been treated in greater detail. Based on direct observations, and on earlier works on nonpolymeric spherulites,…
The decomposition of ethyl mercaptan to ethylene and hydrogen sulphide was studied at various temperatures, with and without a catalyst. Metal sulphides (copper, nickel, and cadmium) proved to be the most efficient catalysts for cracking ethyl mercaptan into unsaturated end products, the optimum temperature being 500–…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Spontaneous Transformation from Macrocrystalline to Microcrystalline Phases at Low Temperatures. The Heat Capacity of MgSO4·6H2O1W. P. Cox, E. W. Hornung, and W. F. GiauqueCite this: J. Am. Chem. Soc. 1955, 77, 15, 3935–3938Publication Date (Print):August 1, 1955Publicat…
An alloy of composition close to Mn3AlC was prepared by induction melting. In the as-cast state the alloy was feebly magnetic at room temperature and the magnetic property was retained after homogenization at 1000°c. This alloy was composed of a single phase possessing an ordered face centred cubic structure with latt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic Reductions by Sodium Aluminum HydrideA. E. Finholt, E. C. Jacobson, A. E. Ogard, and P. ThompsonCite this: J. Am. Chem. Soc. 1955, 77, 15, 4163Publication Date (Print):August 1, 1955Publication History Published online1 May 2002Published inissue 1 August 1955https://…
Angular distributions have been measured for the elastic scattering of 40-Mev alpha particles from Ta, Au, Pb, and Th in the angular range 21\ifmmode^\circ\else\textdegree\fi{} to 155\ifmmode^\circ\else\textdegree\fi{}. If the ratios of the measured cross sections to the Coulomb cross section are assumed equal to 1.0…
Abstract i) Densities, sorption of water vapor and infrared absorption spectra were measured on four kinds of PVA films, which were prepared from the same PVA powder specimen and subjected to different heattreatments. ii) It was found by the present investigation that the 1146 cm−1 (8.74μ) band is the so-called crysta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectra and Structures of Cobalt Carbonyls1R. A. Friedel, I. Wender, S. L. Shufler, and Heinz W. SternbergCite this: J. Am. Chem. Soc. 1955, 77, 15, 3951–3958Publication Date (Print):August 1, 1955Publication History Published online1 May 2002Published inissue 1 August 1955h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPeroxides. II. Preparation, Characterization and Polarographic Behavior of Longchain Aliphatic Peracids2Winfred E. Parker, Constantine Ricciuti, C. L. Ogg, and Daniel SwernCite this: J. Am. Chem. Soc. 1955, 77, 15, 4037–4041Publication Date (Print):August 1, 1955Publication…
Summary: The cells of Navicula pelliculosa become invested in a gelatinous capsule when they cease to divide. This may occur when the culture medium becomes depleted of some necessary element, such as silicon, phosphorus, or nitrogen. A method for the extraction of the capsular fraction has been devised, which is base…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Diagram of the System KNbO3-KTaO3 by the Methods of Differential Thermal and Resistance AnalysisArnold Reisman, Sol Triebwasser, and Frederic HoltzbergCite this: J. Am. Chem. Soc. 1955, 77, 16, 4228–4230Publication Date (Print):August 1, 1955Publication History Publish…