Oxidation of carbons and graphites by atomic oxygen an electron microscope study of surface changes
H. Marsh, T. E. O'Hair and R. Reed, Trans. Faraday Soc., 1965, 61, 285 DOI: 10.1039/TF9656100285
Materials Literature
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Angular Variation of Coercivity in Orthoferrite Single Crystals
The coercive force Hc as a function of the angle between the easy axis of magnetization and the external field has been studied in orthoferrite single crystals using the vibrating sample technique. The experimental results are in good agreement with the Kondorsky 180° wall motion model which predicts the relation Hc(0…
A Study of the Phase Transitions in PbZrO[sub 3]
An investigation of the linear thermal expansion of high purity specimens of polycrystalline has revealed that a ferroelectric phase is stable in this compound between 226° and 236°C on heating. The same phase exists between 226° and 212°C on cooling. The data were all obtained at a constant heating and cooling rate o…
The Effect of Composition and Structure on the Electrochemical Reactivity of Nickel
The electrochemical reactivity of nickel is defined in terms of the parameters of the anodic polarization curve as determined potentiostatically. The effect of structure and the effect of the additives carbon, silicon, sulfur, selenium, tellurium, and phosphorus on the parameters of the polarization curve have been de…
Reflection Spectra of Lanthanides in Cubic Oxides Containing Titanium (IV), Zirconium (IV), Indium (III), Tin (IV), Cerium (IV), and Thallium (III)
Reflection spectra are measured at 100°K of M= neodymium(III), samarium (III), europium (III), dysprosium (III), holmium (III), erbium (III), and ytterbium (III) in mixed oxides such as M x M′1- x O 1,5 [M′=yttrium (III), indium (III), lanthanum (III), gadolinium (III) or thallium (III)] and M x M′1- x O 2 -0.5 x [M′…
High-Temperature Specific Heats of Ge, Si, and Ge-Si Alloys
The specific heats of Ge, Si, and Ge-Si alloys were determined in the temperature range 300° to 1000°K, by a novel temperature-modulation technique. The specific heat at constant pressure cp exceeds appreciably the Dulong-Petit value cDP at high temperature. Above the Debye temperature θD the divergence can be represe…
Hydrogen Bonding and Complex Formation in Solutions of t-Butyl Hydroperoxide1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen Bonding and Complex Formation in Solutions of t-Butyl Hydroperoxide1Cheves Walling and LaDonne HeatonCite this: J. Am. Chem. Soc. 1965, 87, 1, 48–51Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965…
1194. The chemistry of polynuclear compounds. Part III. Magnetic properties of some carboxylic acid derivatives of copper(II)
J. Lewis, Y. C. Lin, L. K. Royston and R. C. Thompson, J. Chem. Soc., 1965, 6464 DOI: 10.1039/JR9650006464
Poly‐1,3,4‐oxadiazoles. I. Polyphenylene‐1,3,4‐oxadiazoles
Abstract Polyphenylene‐1,3,4‐oxadiazoles have been prepared from benzenedicarboxylic acids or their derivatives and hydrazine by solution polycondensation in fuming sulfuric acid or polyphosphoric acid. These polymers were characterized by good thermal stability, and the molecular weights attained were high enough for…
Comparative Interpretation of Absorption Spectra of Technetium (IV) and Rhenium (IV) Hexahalides
Absorption spectra of aqueous solutions of TcX 6 - and ReX 6 - (X = F, Cl, Br, I) are measured between 8 000 and ∼ 50 000 cm -1 and theoretically discussed. The electron transfer spectra indicate the optical electronegativity x opt = 2.25 for Tc (IV) and 2.05 for the less oxidizing Re (IV). The spectrochemical paramet…
Performance of synthetic insulating materials under polluted conditions
Both the dust/fog and IEC methods have been used to investigate the resistance to surface tracking and erosion of a range of synthetic insulating materials under polluted conditions. The relative merits of these test methods are discussed, and reasons given for preferring the dust/fog test. Consideration is also given…
Optical Absorption and Photoluminescence of Cu‐Doped Alkali Halide Crystals
Abstract Absorption, excitation, and and emission spectra of KCl, KBr, and KI single crystals doped with Cu, are investigated in the spectral range from 200 to 1200 nm at temperatures from 77 to 700 °K. The absorption and excitation spectra of KBr:Cu at 77 °K show three bands centred at 210, 235, and 265 nm. Since the…
The crystal structure of silver tetraborate Ag 2 O.4B 2 O 3
Crystalline Ag~O. 4B203 has been prepared and fotmd to be monoclinic with unit-cell dimensions a=6.5500-003, b=8-671 0.004, c=17.511___0.008 A; fl=90 18'6'.
The Instability of the Work Hardened State. II. Slip in “Alien” Dislocation Distributions
Abstract The mechanism of slip in copper crystals with extraneously deformed surfaces was investigated using an etch pit technique. Some suggestions are made as to the deformation of crystals with hard surface layers. Slip in crystals oriented for multiple glide and in polycrystals is also discussed. Experiments of th…
Structural and thermodynamic aspects of phosphate glasses
T. R. Meadowcroft and F. D. Richardson, Trans. Faraday Soc., 1965, 61, 54 DOI: 10.1039/TF9656100054
Farbe und Konstitution bei anorganischen Feststoffen. VIII [1] B. Die Lichtabsorption des zweiwertigen Nickels in den Mischkristallen Mg1—xNixO und in tetraedrischer Koordination
Abstract Die Lichtabsorption der Mischkristalle Mg 1–x Ni x O wird im Spektralgebiet zwischen 4000 und 28 000 cm −1 untersucht. Eine Deutung der beobachteten Depression der Racah‐Parameter B und C mit steigendem x und der anomalen Intensitätsverschiebungen innerhalb des Bandensystems bei zunehmender Ni 2+ ‐Konzentrati…
UV Absorption of Ag+ Doped Alkali Halide Crystals
Abstract Absorption spectra of Ag + doped NaCl, KCl, KBr, and KJ are measured at low temperatures in the spectral range from 6.8 to 4.4 eV. The fine structure of the Ag + bands and their temperature dependence are investigated. The oscillator strenghts at low temperatures are in the order of 10 −3 . These Ag + absorpt…
Diffusion of Gold into Silicon Crystals
Profiles are obtained for gold diffusing into silicon wafers of finite thickness. The profiles do not obey Fick's law. The effects of shallow diffusions of phosphorous and boron on the gold concentration are described; gold concentration is higher in areas of high phosphorous concentration.
Tracer Diffusion in β‐Titanium
Abstract Tracer diffusion measurements in β‐titanium are reviewed and new data presented for solutes Sc 46 , Sn 113 , and P 32 . All Arrhenius plots are curved and give unusually low activation energies and frequency factors. Various explanations are outlined and it is suggested that monovacancy diffusion dominates bu…
Electrical Properties of LixNi(1-x)O Single Crystals
Aiming at a better understanding of still vague conduction processes in NiO, extensive measurements of the electrical resistivity ρ were made between 300 and 1020°K on Li x Ni (1- x ) O single crystals epitaxially grown on the MgO substrates, where x from zero up to 0.065 was controlled by diffusion method. The main r…