Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTJahn-Teller effect of titanium(3+) in octahedral coordination: a spectroscopic study of hexachlorotitanate (TiCl63-) complexesR. Ameis, S. Kremer, and D. ReinenCite this: Inorg. Chem. 1985, 24, 18, 2751–2754Publication Date (Print):August 1, 1985Publication History Published…
Carlosturanite is a new rock-forming silicate occurring in a network of veins crosscutting the antigorite serpentinite of Sampeyre in the Monviso ophiolite, Italy. It is light-brown, asbestiform, and the [010] fibers are paralleled by fibrous diopside and chrysotile. The mineral is monoclinic Cm, with a = 36.70, b = 9…
Abstract A new mathematical model has been developed for the continuous esterification process of terephthalic acid (TPA) and ethlene glycol (EG) with consideration of oligomer characteristics. The liquid weight fraction in the reaction mixture, β, has been selected as a principal parameter in this model. The solubili…
Hydrogen permeation transients for low-carbon iron were measured at room temperature; pure nickel and 17Cr-12Ni austenitic stainless steel (SS) specimens were electrochemically charged with hydrogen. The results for unstrained specimens were compared with those obtained under conditions of continuous stretching. A sli…
Abstract Density and wide angle x‐ray scattering techniques were used to study the form II to form I phase transformation in polybutene‐1. The influence of deformation by cold rolling, orientation produced by melt processing (film blowing), and certain additives blended with the homopolymer on the phase transformation…
Summary Alkaline chemicals in enhanced recovery operations are used (1) as preflush agents, (2) with polymers and surfactants, and (3) as a principal recovery agent. In these chemical flooding techniques, the precipitation reactions of multivalent hardness ions with alkalis are of particular concern. These reactions m…
Abstract Simha's equation of state provides the relation between reduced pressure, temperature, and volume (P̃, T̃, and Ṽ, respectively) and the occupied site fraction, y = y (P̃, T̃). The latter theoretical parameter combines the P and T effects on the occupied and unoccupied (“free volume”) part of the model liquid.…
Liquid-crystal lens-cells shaped like a plano-convex Fresnel lens with homogeneous alignment are prepared. Their focal length can be varied from the value f e for an extraordinary ray to nearly f o for an ordinary ray by applying an electric field across the cell. The response and recovery times within several seconds…
A scratch test was used to study the pitting of an Fe-19Cr-10Ni alloy in a solution containing 0.25 molar (M) Na2SO4 and 0.025 M Na2S2O3. Pitting was confined to a range of potentials from − 325 to −100 mV (SCE). The maximum susceptibility was at −225 mV, where pitting was very rapid. In this system, pitting can occur…
Measurements of the properties of shallow underwater explosions have been obtained in recent experiments with 0.82-kg SUS (signal underwater sound) charges at depths from 23.5 to 194.5 m. The data were recorded in the farfield with a high-resolution digital recording system to ensure good reproduction of both the high…
Abstract The conversion of smectite to illite by way of a mixed-layer illite/smectite (I/S) series was found to be the major depth-related reaction in clay-mineral assemblages from two cored sedimentary sequences in the Rocky Mountains. The I/S reaction occurred in both interbedded sandstone and shale of Upper Cretace…
The electrochromism of amorphous V 2 O 5 thin films prepared by the vacuum evaporation of V 2 O 5 powder was studied through optical absorption, XPS and SIMS measurements. The films were colored and bleached with the aid of an electrolyte consisting of lithium perchlorate (LiCLO 4 ·3H 2 O) in propylene carbonate (CH 3…
The dispersive refractive index n(λ) and thickness d of thin films are usually determined from measurements of both transmission and wavelength values. Many factors can influence transmission values, leading to large errors in the calculated values of n(λ) and d. A method is presented to determine n(λ) and d in the re…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZinc oxide: an outstanding example of a binary compound semiconductorWolfgang H. HirschwaldCite this: Acc. Chem. Res. 1985, 18, 8, 228–234Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pubs.acs.org/…
The detailed study of optical transmittance and reflectance in Al-doped ZnO thin films prepared by rf magnetron sputtering is described. Films obtained with Al 2 O 3 content up to 10 wt% showed an average transmittance above 85% in the visible range. The absorption edge was blue-shifted with increasing carrier concent…
The experimental evaluation of the parameters of a general stochastic model for the initiation of pitting corrosion on stainless steels is described. The variation of these parameters with experimental conditions is used in the development of a microscopic model. A microscopic model which accords with the observed beh…
Abstract Effective chain extenders for linear polyesters were investigated among some bis‐heterocycles, which were capable of coupling carboxyl terminals of the polyesters through addition reaction. Consequently, 2,2′‐bis(2‐oxazoline), 2,2′‐bis(5,6‐dihydro‐4H‐1,3‐oxazine) and N , N′ ‐hexamethylenebis(carbamoyl‐2‐ oxaz…
Abstract The infrared amide I band of collagens (rat and cod skin) and related compounds (polyproline, polyglycine, and polytripeptides) was studied. Assignment of amide I‐band components for polyproline II and polytripeptides (Gly‐Pro‐Pro) n and (Gly‐Pro‐Gly) n in the solid state and water solution was made. Three am…
An experimental study of the liquidus projection in a phase diagram of the Nd-Fe-B ternary system has been carried out. In the Nd-poor region, it is found that two phases, Fe 2 B and Nd 2 Fe 7 B 6 (T 2 ), coexist with the liquid. Two monovariant curves, L\rightleftharpoonsFe+Fe 2 B and L\rightleftharpoonsFe 2 B+T 2 ,…