Materials Literature
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A method for obtaining extremely wide-band light modulation by traveling-wave interaction in electro-optic or magneto-optic materials is described. When the intrinsic velocity of microwaves in the material is appreciably less than that of light, the synchronism conditions require the light to be directed obliquely wit…
Abstract not Available.
An oxide of titanium, apparently Ti 2 O 3 , showed solid solubility in Al 2 O 3 of 1.0, 1.8, and 2.5 mole % at 1400°, 1600°, and 1700°C, respectively, when heated in hydrogen with a dew point of about ‐50°C. At the same temperatures in air, however, no indication of solid solubility (of TiO 2 , presumably) was found b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDEHYDROXYLATION OF KAOLINITE. II. CONDUCTOMETRIC MEASUREMENTS AND INFRARED SPECTROSCOPYJ. J. Fripiat and F. ToussaintCite this: J. Phys. Chem. 1963, 67, 1, 30–36Publication Date (Print):January 1, 1963Publication History Published online1 May 2002Published inissue 1 January…
R. J. H. Clark and T. M. Dunn, J. Chem. Soc., 1963, 1198 DOI: 10.1039/JR9630001198
Films produced on titanium depend on the nature and concentration of electrolyte, forming voltage, current density, and temperature. In most cases, dense films of limited thickness are produced, but in some cases, thick, porous films result. Physical, chemical, and electrical nature of the coatings are discussed toget…
The zirconium-deuterium system in addition to α-Zr consists of three deuteride phases: γ, δ, and ε. Each phase exists over a wide range of compositions. The γ phase is tetragonal. The δ phase is cubic (CaF 2 -type). The ε phase is tetragonal. Its lattice constants vary with composition as it approaches stoichiometry o…
S. B. Hartley, W. S. Holmes, J. K. Jacques, M. F. Mole and J. C. McCoubrey, Q. Rev. Chem. Soc., 1963, 17, 204 DOI: 10.1039/QR9631700204
Abstract not Available.
Abstract Die Bakteriencellulose von Acetobacter xylinum besteht wie die Cellulose der pflanzlichen Primärwände aus Elementarfibrillen, die mit 35 Å Durchmesser (Fig. 1, 2) nurmehr etwa 36 Kettenmoleküle enthalten (Fig. 3). Diese verhalten sich wie spröde Kristallnadeln, woraus auf ein homogenes Kettengitter geschlosse…
The specific heat of atactic and isotactic polypropylene has been measured from 80° to 490°K. The isotactic sample was 64.9% crystalline, as determined by specific volume, and the atactic sample was 2–3% crystalline, as determined by the specific heat measurements. Below the glass temperature, which was found to be 25…
During the coagulation step in the wet spinning process, a concentrated, highly viscous polymer solution is transformed into protofibers which require further processing before they acquire textile fiber properties. The structure of these protofibers is strongly influenced by coagulation conditions, and this structure…
Studies of both single crystals and ceramics of samarium‐doped BaTiO 3 having identical compositions show that the positive temperature coefficient (PTC) electrical resistivity anomaly originates at the grain boundaries of the ceramic. The grain‐boundary region is visualized as an electron exhaustion layer, 10 2 to 10…
D. Dollimore, D. L. Griffiths and D. Nicholson, J. Chem. Soc., 1963, 2617 DOI: 10.1039/JR9630002617
The pure magnesium orthorhombic amphibole, anthophyllite, has been synthesized and its upper and lower stability limits have been established by reversible hydrothermal experiments. The synthetic mineral has refractive indices nx=1·587±0·001, ny=1·602±0·005, nz=1·613±0·001, and unit-cell dimensions of a0=18·61±0·02 Å,…
The mathematical treatment of light scattering by regular and random arrays of points is outlined. The diffraction patterns of two-dimensional models are compared with patterns from ideal crystals, imperfect crystals, and paracrystalline lattices. The effects of various types of crystalline imperfections and paracryst…
The diffusivity of the oxygen ion in vitreous silica has been directly determined by exchange measurements employing the stable isotope 18 O and mass spectrometer analysis. It was found that over the temperature range 925° to 1225°C the results can be represented by the equation D = 1.51 × 10 −2 exp (‐71,200/ RT ) cm…
E. A. Boudreaux, Trans. Faraday Soc., 1963, 59, 1055 DOI: 10.1039/TF9635901055
Transient radiation effects are defined to be manifestations of electrons excited in materials, i. e., ionization effects. Manifestations of particular interest are the emission of secondary electrons from surfaces, conduction in ionized gases, semiconductors and insulators, and the emission and absorption of optical…
A normalized formulation of the problem of isothermal bubble growth, dominated by viscosity and diffusion, reveals that in its full generality the problem involves eight dimensionless parameters. Limiting cases for extreme values of each of these parameters are investigated.