Materials Literature
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A new instrument has been developed which allows simultaneous measurement of partial discharge (PD) and radio-interference voltage (RIV) in insulation of high-voltage power apparatus. A distinctive feature of this instrument is that it fulfills the low input impedance (150-Ω) requirement of the RIV measuring standard…
The intermetallic compound ScFe2 is capable of absorping large amounts of hydrogen, which can be derived from the measured absorption isotherm and from the lattice constant before and after charging. The magnetic properties of ScFe2 are sensitive to small variations in the stoichiometry and are changed significantly a…
Abstract The complete manuscript of this communication appears in: Angew. Chem. Suppl. 1982 , 457. DOI: 10.1002/anie.198204570
Abstract When mixing EPDM and BR in the Brabender a heterogeneous blend results; the dispersed phase is first sheared into fibrous strands and then broken down into micron sized particles. At low doses of irradiation, the morphology of the blend only has a minor effect on the energy to break, whereas at high doses the…
Abstract The new mineral theophrastite, Ni(OH) 2 , from Unst, is Mg-bearing and occurs associated with a very poorly crystalline Ni-containing mixed hydroxide of the pyroaurite type and/or zaratite on chromitite. X-ray powder diffraction data show a shift in d spacing toward brucite compared with pure Ni(OH) 2 . Infra…
Optical transmission and reflection measurements are reported for the quasi one dimensional solids perylene-TCNQ (P1T1) and (perylene) 3 -TCNQ (P3T1) in the region from 300 to 1200 nm. Raman spectra of single crystals of both compounds were obtained from 20 to 3000 cm −1 . With 457.9 nm excitation, combinations and ov…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusual electronic spectra of the pseudotetrahedral complex [tris(3,5-dimethyl-1-pyrazolyl)ethylamine]cobalt(II) bis(tetraphenylborate)Lucia Banci, Cristiano Benelli, Dante Gatteschi, and Fabrizio ManiCite this: Inorg. Chem. 1982, 21, 3, 1133–1136Publication Date (Print):Mar…
Abstract The glass transition behavior of two sets of ABA poly(styrene‐ b ‐isoprene) block copolymers was examined by differential scanning calorimetry. In one series, the triblock copolymers had different total molecular weights and the same (30 wt %) polyisoprene content, in the other, the molecular weight was const…
ABSTRACT Experiments indicate that gypsum can be precipitated by the mixing of seawater brines of different stages of evaporation, in addition to the previously recognized mechanisms of direct evaporative crystallization and crystallization due to temperature changes. A proposed geologic model shows how gypsum precipi…
The magnetic susceptibility for 14.3 at.% Mn and 14.3 at.% Co aluminosilicate glasses has been measured via a sensitive pendulum magnetometer from 4 to 300 K in a field of 5 kOe. For temperatures above 80 K a Curie–Weiss law was obeyed in both systems; however, below 80 K strong deviations from this law occurred. From…
Abstract Found on a specimen in the mineral collection of the National Museum of Wales, no. NMW 27.111.GR414, from the Aberllyn mine, Llanrwst mining field, North Wales, with hydrozincite on a breccia cemented by sphalerite, quartz, calcite, and ankerite. Atomic absorption and TGA analyses gave ZnO 37.8, CuO 22.0, SO…
A general theory of X-ray intensity statistics for twins by merohedry is developed based on mathematical analogy of this problem to a one-dimensional random walk. Probability distribution functions are derived (a) for intensities from a single twinned specimen, and (b) for the differences in intensities from two separ…
The temperature dependence of the magnetostriction from 80–300 K, as a function of applied field, was investigated in a series of SmxDy1−xFe2 (x = 0.86, 0.70, 0.55, 0.40, and 0.20) polycrystalline compounds. Large strains are observed in Sm0.86Dy0.14Fe2 with λ∥−λ⊥ = −1688×10−6 at room temperature and −2725 ppm at 80 K…
Abstract The effect of carbon black upon the reversion process in the sulfur-accelerated vulcanization of natural rubber has been studied. It is found that black-filled cure systems have a faster rate of vulcanization and better reversion resistance. The net decrease of trans -methine content, which is equivalent to t…
Abstract Sediments of the Tertiary Akata and Agbada Formations have been studied by mineralogical and petrographic techniques. In the Akata and Agbada shales the clays are largely detrital, with only minimal alteration attributable to the effects of burial diagenesis. Clay minerals occur in minor (<10%) amounts in…
Studies have been made of the magnetization of GdFeB and GdCoB amorphous thin films in which ratios of Gd to transition metal and B to transition metal were varied. In GdCoB alloys the Co moment decreases as the sum of the B and Gd concentration increases. Assuming a charge transfer mechanism, each Gd contributes 1.4…
Abstract This lecture reviews some representative types of aqueous corrosion problems encountered in the various facets of the petroleum industry. The fundamental processes underlying these corrosion problems are examined. In addition, commonly used methods for corrosion prevention and control which rely on modificati…
A single-ion anisotropy mechanism is considered to discuss the volume average of magnetostriction in macroscopically isotropic amorphous ferromagnetic alloys. Within the framework of our phenomenological theory, the macroscopic magnetostrictive strain vanishes only if the volume average of the local anisotropy coeffic…
In this paper a method for solving wave propagation problems of an infinite bar of arbitrary cross section has been presented. The frequency equation for finding phase velocites for longitudinal, torsional, and flexural waves have been obtained by making use of the Fourier expansion collocation method which has been d…
The magnetic susceptibility of the mixed quasi-one-dimensional system ${({\mathrm{CH}}_{3})}_{4}\mathrm{N}{\mathrm{Mn}}_{x}{\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Cl}}_{3}$ has been measured down to 0.32 K for $x$ ranging between 0 and 1. At 4.2 K the susceptibility starts to increase with $x$ up to $x\ensuremath{\si…