Materials Literature
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DC magnetization measurements at 4.2K in applied fields up to 340 kG are reported. The smooth behaviour of the magnetization curves confirms that the anisotropy may be attributed to the octahedral site Mn ions.
Mossbauer and magnetization measurements have been carried out in Co 2 -Z compound. The Mossbauer data have been correlated to measurements of magnetization and anisotropy constants. The temperature dependence of the second-order anisotropy constant K 2 turn out to be of single-ion origin and essentially determined by…
The thermal and electrical resistivity and Seebeck coefficient of heavily doped, pressure-sintered germanium-silicon alloy specimens have been measured in the temperature range 300-1200K. The thermal resistivity was considerably in excess of that for corresponding crystalline samples at temperatures below that of the…
The change in the band gap of a semiconductor due to high doping is considered in the limit where the free carriers form a degenerate gas. In contrast to previous treatments, the effect of the change in the electron interaction on the whole band structure is considered within a self energy framework so that the differ…
The electrical resistivities of single crystals of LaB 6 and ReO 3 were measured in the temperature ranges of 4.2-360K and 4.2-300K, respectively. The residual resistance ratio of LaB 6 was 450 and that of ReO 3 was 90. The resistivity value of LaB 6 at 300K is 8.90*10 -6 Omega cm and for ReO 3 , 10.5*10 -6 Omega cm.…
Abstract A comprehensive method is given for describing in reduced terms pendent drops, emergent bubbles, sessile drops and captive bubbles of a fluid α within a fluid β as figures produced by revolution of their meridian curves (X, Z). Boundary conditions at a solid surface are: (a) with a constant contact radius XƟ;…
Long-wavelength (submillimeter plus millimeter) photoconductivity measurements in doped germanium have been performed under uniaxial compressive stress along the [111] crystal direction. The electron affinity estimated from newly observed spectra is smaller than that in a previous measurement without stress and is con…
$1T\ensuremath{-}{M}_{x}{\mathrm{Ta}}_{1\ensuremath{-}x}{\mathrm{S}}_{2}$ or $1T\ensuremath{-}{M}_{x}{\mathrm{Ta}}_{1\ensuremath{-}x}{\mathrm{Se}}_{2}$ with $M=\mathrm{F}\mathrm{e},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{o},\phantom{\rule{0ex}{0ex}}\mathrm{o}\mathrm{r}\phantom{\rule{0ex}{0ex}}\mathrm{N}\mathrm{i}$…
The dynamics of the helix-coil transition of single-stranded poly(C) (polyribocytidylate) and CpC (cytidyly(3'-5')cytosine) was investigated by an improved cable temperature-jump technique. The single-strand relaxation was characterized by following the ultraviolet (uv) absorbance changes at 248 and 280 nm. Poly(C) an…
SUMMARY The general principles laid down by Swart & Kritzinger (1974a) in a paper dealing with the unfaulting of Frank dislocation loops by the simultaneous action of two shearing Shockley dislocations are applied to explain the structure and electron diffraction contrast behaviour of certain complex single‐layer…
A series of $^{129}\mathrm{I}$ M\"ossbauer measurements have been completed on $4\ensuremath{-}n\ensuremath{-}\mathrm{hexoxybenzylidene}\ensuremath{-}{4}^{\ensuremath{'}}\ensuremath{-}^{129}\mathrm{iodoaniline}$ dissolved in the liquid crystal $4\ensuremath{-}n\ensuremath{-}\mathrm{hexoxybenzylidine}\ensuremath{-}{4}^…
The saturation magnetostriction of gadolinium single crystal has been measured from 4.2 K to 330 K, above the Curie temperature, by a strain gauge technique. The anomalous saturation magnetostrictions along the c - and a -axes in the a c plane were observed at low temperatures. These anomalies are explained by the hig…
The satellite structure observed in the XPS spectra of metallic Ni is identified with the separation in energy between 'one-hole' and 'two-hole' final states. Similar structure is observed in Co and can be associated with the Ni and Co levels in Ni 3 Fe and CoFe alloys. No such effects are resolved in Fe. The experime…
Abstract The contribution of plastics to the total amount of waste produced is increasing significantly. Not only do plastics present disposal difficulties, but traditional disposal techniques constitute a waste of valuable resources. A process to recycle plastic waste economically would provide an attractive solution…
This article discusses various technical and economic aspects of alum recovery from different sludges for coagulant reuse.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and Mechanism of Vapor Phase Oxidation of Furfural over Tin Vanadate CatalystK. Rajamani, P. Subramanian, and M. S. MurthyCite this: Ind. Eng. Chem. Process Des. Dev. 1976, 15, 2, 232–234Publication Date (Print):April 1, 1976Publication History Published online1 May…
Abstract The mechanism of the thickening reaction between alkaline earth metal oxides and acid group‐terminated polyester resins was studied. The thickening can occur either by the increase in molecular weight of the resin through neutral salt formation or by complex formation between the basic salt and carbonyl oxyge…
Moldable mixtures of paraffin wax and TiO2 powders (both rutile and anatase) are easily prepared and are shown to have dielectric constants continuously variable between 2.25 and 7.5 for concentrations of TiO2 up to 35% by volume. Comparison with theory suggests that neither powder has a spherical depolarizing factor,…
A criterion for the time-dependent failure of materials is developed based upon the concept that failure results from an incremental accumulation of damage. The failure criterion is thereby explicitly tied to the incremental flow law describing the inelastic deformations. The damage increment is assumed as a product o…
Niobium crystals, with a wide range of orientations, have been deformed at temperatures where slip takes place on the anomalous (011) plane. A strong orientation dependence of the axial yield stress was observed in both tension and compression; at 77 K the stress-strain curves were serrated. Both the yield stresses an…