Intentos para expresar las relaciones existentes entre ciertas características físicas y mecánicas de los ladrillos de tierra cocida
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Radioactive rays control Clinker depth
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On the Magnetic Properties of a CrBr3 Single Crystal
Magnetic properties of single crystals of CrBr 3 have been measured with a magnetic balance and also with a torque magnetometer. The ferromagnetic Curie point has been found to be 37°K from the temperature dependences of magnetization and of torque. Based on the data of the magnetic susceptibility above the Curie poin…
Magnetic Properties ofMn3O4and the Canted Spin Problem
The magnetic properties of single crystals of hausmannite (${\mathrm{Mn}}_{3}$${\mathrm{O}}_{4}$) have been investigated between 4.2\ifmmode^\circ\else\textdegree\fi{}K and the ferrimagnetic Curie point at 41.9\ifmmode^\circ\else\textdegree\fi{}K. The $c$ axis was found to be the hard direction of magnetization and th…
Cascade Capture of Electrons in Solids
Enormous capture cross sections in the range ${10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{2}$ to ${10}^{\ensuremath{-}12}$ ${\mathrm{cm}}^{2}$ have been observed for a wide variety of Coulomb attractive centers in Si and Ge, some involving binding energies many times the Debye energy. Whereas multiphonon transitions to t…
Crystal Structure of β-Ga2O3
The crystal structure of β-Ga2O3 has been determined from single-crystal three-dimensional x-ray diffraction data. The monoclinic crystal has cell dimensions a=12.23±0.02, b=3.04±0.01, c=5.80±0.01 A and β=103.7±0.3° as originally reported by Kohn, Katz, and Broder [Am. Mineral. 42, 398 (1957)]. There are 4 Ga2O3 in th…
DEFORMATION MODES OF SINGLE CRYSTAL URANIUM DIOXIDE FROM 700 C TO 1900 C
Single crystals of uranium dioxide were deformed in compression at 700 to 1900 deg C. The most active slip plane at all temperatures was {100}, with {110} and {111} becoming more active as the temperature was increased. The slip direction for {100} slip was determined as. Fracture occurred on {111} planes with a singl…
The crystal structure of the R phase, Mo–Co–Cr
The crystal structure of the R phase in the Mo-Co-Cr system, with atom ratio 30. 4-51.3-18.3, has been determined by single-crystal X-ray diffraction analysis. The crystal has space group C~i-R-3, with 53 atoms per rhombohedral cell. The rhombohedral lattice constants are a 0 = 9.011 /~, a = 74 27"5', hexagonal lattic…
On the mechanism of ozone degradation of SBR
Abstract The reaction mechanism of the ozone attack of SBR copolymers was studied to obtain information for use in the development of elastomeric materials having improved resistance to deterioration in service. Techniques of ultracentrifugation and viscometry were utilized to follow molecular changes induced by ozone…
23—THE MECHANICS OF TWISTED YARNS : FURTHER STUDIES OF THE TENSILE PROPERTIES OF CONTINUOUS-FILAMENT YARNS
This paper reports continued studies of the tensile properties of twisted continuous-filament viscose rayon, Tenasco, acetate, nylon and Terylene yarns, with particular reference to the influence of twisting tension, the differences between ring-twisted and uptwisted yarns, values of the work of rupture and the yarn c…
Optical Rotatory Dispersion Studies on Polysaccharides. II. Conformation of Partially Methylated Cellulose in Solution1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical Rotatory Dispersion Studies on Polysaccharides. II. Conformation of Partially Methylated Cellulose in Solution1Brock NeelyCite this: J. Am. Chem. Soc. 1960, 82, 16, 4354–4357Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Publishe…
Reactions Between Steel Surfaces and Zirconium in Liquid Bismuth
The variables affecting corrosion and mass transfer of steels by inhibited liquid Bi are discussed and explained in terms of the variables affecting formation of the ZrN or ZrC inhibiting films. Corrosion is acclerated by increasing the maximum temperature of operation, the temperature differential, and the Cr content…
Gitterkonstanten, Ausdehnungskoeffizienten, Dichten, Fehlordnung und Aufbau der Phase Titan(II)‐Oxyd
Abstract Fünf Präparate verschiedener Zusammensetzung innerhalb der homogenen Phase TiO wurden durch Sintern von TiO 2 ‐ und Ti‐Mischungen bei 1400° hergestellt, bei 1000° homogenisiert und dann von dieser Temperatur abgeschreckt. Gitterkonstantenmessungen ergaben für das TiO stöchiometrischer Zusammensetzung den Wert…
Thermal Conductivity of Eight Halide Crystals in the Temperature Range 220°K to 390°K
The thermal conductivity of eight halide crystals has been measured over the temperature range 220°K to 390°K. The thermal conductivities of potassium bromide, potassium chloride, and sodium chloride vary inversely with temperature for the lower part of this temperature range, and are nearly independent of temperature…
Communications- Preparation and Chemistry of Tetracyanoethylene Anion Radical
ADVERTISEMENT RETURN TO ISSUEPREVArticleCommunications- Preparation and Chemistry of Tetracyanoethylene Anion RadicalO Webster, W Mahler, and R BEnsonCite this: J. Org. Chem. 1960, 25, 8, 1470Publication Date (Print):August 1, 1960Publication History Published online1 May 2002Published inissue 1 August 1960https://pub…
Structure of Glass-Forming Halides. II. Liquid Zinc Chloride
Measurements of viscosity and electric conductivity in liquid zinc chloride indicate that at temperatures near the melting point, the melt is associated. The degree of association diminishes rapidly with increasing temperature as shown by the decreasing energies of activation for both viscous flow and conduction. Liqu…
Trapped Electrons in Irradiated Quartz and Silica: I, Optical Absorption
Evidence is given for the correlation between an optical absorption band at 2300 a.u. and an electron spin resonance system developed in quartz after 60 Co γ‐irradiation. The results of bleaching γ‐irradiated quartz and silica at 78°K. and at room temperature are presented and discussed. Also, further observations upo…
Radiation Effects on Dimethyl-diphenyl Siloxane Copolymer. I. Protective Effect of Phenyl Radical on the Cross-linking.
The radiation effects both of polydimethyl siloxane and dimetyl-diphenyl siloxane copolymers were studied by the use of gamma rays of cobalt-60 in order to estimate the protective effect due to phenyl radical against the radiation-induced cross-linking. The viscosity of irradiated sample increased with the absorbed do…
Mechanism of amine crosslinking of fluoroelastomers. I. Solution studies
Abstract Solution studies of Kel‐F elastomer and Viton A with various amines have shown that dehydrohalogenation is the primary step in crosslinking and usually proceeds at temperatures lower than those required for gelation. There is a difference in the reactivity between the two polymers; dehydrohalogenation and gel…
X-Ray Reflection Studies of the Anneal and Oxidation of Some Thin Solid Films
The technique of the total reflection of x rays has been applied to the study of thin films of Cu, Ni, Ge, and Se vacuum-deposited onto polished glass substrates. Starting with fresh films, ``smooth'' enough to exhibit pronounced x-ray interference fringes in the region just beyond the critical angle, the effects of v…