Materials Literature
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FTIR spectra are reported of CO adsorbed at 303–573 K on Pt/Al2O3, Rh/Al2O3 and Pt–Rh/Al2O3. Catalysts containing Rh were precalcined at either 673 K or 873 K before reduction in hydrogen and exposure to CO. The intensities of infrared bands due to gem-dicarbonyl and linear carbonyl species were a function of both the…
In this paper, the acid-base interaction in terms of the molecular interaction is discussed from a broader background. Thus, the overall nature of the acid-base interaction consists of electrostatic, charge (or electron) transfer, exchange, polarization, and dispersion components. Among them, the electrostatic (or ion…
Work undertaken to elucidate failures of standard austenitic stainless steels in indoor swimming pool atmospheres which have occurred in recent years in Europe and North America is described. The unusual feature of these failures is that they occurred by a stress corrosion cracking (SCC) mechanism at ambient temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcessible precursor for boron nitride coatings and matrixesKazimiera J. L. Paciorek, Steven R. Masuda, Reinhold H. Kratzer, and Wayde R. SchmidtCite this: Chem. Mater. 1991, 3, 1, 88–91Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Pu…
The purpose of the research was to find effective ways of improving the chemical durability of phosphate glasses while maintening a thermal expansion coefficient superior to 175.10 -7 °C -1 and retaining other desirable properties which are needed for sealing to low melting, high expansion metals and alloys.The genera…
The batch-type hot-dip Zn and 5%Al-Zn coatings were investigated in the present work for correlations between their corrosion resistance, electrochemical behaviors, and microstructures. The microstructures of the coatings were altered with air cooling and water quenching for studying the corrosion resistance mechanism…
Single-crystal X-ray work has been carried out on crystals containing the 1-methylimidazole adduct of µ-oxo-bis[(phthalocyaninato)iron(III)], [{Fe(pc)(mim)}2O]·[Fe(pc)(mim)2]·3Me2CO. The crystals are monoclinic, space group C2/c, with a= 35.236(5), b= 14.173(2), c= 23.220(3)Å, β= 103.56(10)° and Z= 4. The structure wa…
The ground-state Coulomb energy and zero-point vibrational energy are calculated numerically for the perfect two-dimensional (2D) Wigner crystal and for a 2D Wigner crystal containing interstitials and vacancies. In the limit of large systems, only the vacancy and the interstitial with threefold rotational symmetry ar…
This paper describes the structural (species richness, species diversity, pattern-diversity, biomass, coverage, specific distribution, homogeneity) and functional (production, PIB ratio) changes observed during the annual cyc1es of eight phytobenthic Mediterranean communities by using PCA analysis. The first axis obta…
Abstract Depending on the size of the pores and on the temperature and pressure of the fluid, flow in microporous materials can be through gas diffusion, surface diffusion, and viscous liquid flow driven by capillary forces or by hydraulic pressure. We have studied these flow regimes with toluene in untreated Vycor gl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer-precursor routes to metal borides: synthesis of titanium boride (TiB2) and zirconium boride (ZrB2)Kai Su and Larry G. SneddonCite this: Chem. Mater. 1991, 3, 1, 10–12Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published iniss…
The chemistry of the surface of activated carbon has been analysed. Five activated carbons obtained by a modification of raw carbon were investigated. The following techniques were employed: elemental analysis, acid—base reactions, thermal decomposition, IR spectroscopy, calorimetric heat determination, wetting with w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-phase model for continuous final stage melt polycondensation of poly(ethylene terephthalate). 1. Steady-state analysisClaude Laubriet, Brice LeCorre, and Kyu Yong ChoiCite this: Ind. Eng. Chem. Res. 1991, 30, 1, 2–12Publication Date (Print):January 1, 1991Publication His…
An extract of the seed of Sandoricum koetjape has yielded two new limonoids, sandoricin [1] and 6-hydroxysandoricin [2]. Both compounds are effective antifeedants when incorporated into artificial diets and fed to fall armyworm (Spodoptera frugiperda) or European corn borer (Ostrina nubilalis) larvae. Reduced growth r…
As described in a previous paper (Wright and Adams, 1990), with the advent of new techniques it has become practical to consider using single orientation measurements for texture investigations. Advantages of using single orientations measurements over the traditional bulk measurement using pole figures are: direct ac…
Theoretical models for rail internal self-inductance and resistance are proposed which include material saturation and hysteresis. Model data are obtained using experimentally derived ferromagnetic material B-H loops. Analytical methods for deriving the impedance variations with current and frequency for large-signal…
Alpha-zirconium is a very poor solvent for most alloying metals. Moreover, it has a high affinity for these metals. Consequently, intermetallics are easily formed and highly visible in zirconium and its alloys. Many researchers believe that the corrosion resistance of zirconium and its alloys depends strongly on the d…
We show that the classical variants of the integral method for single-and multiple-coated gratings are not optimal with respect to their computational cost. More economical variants are presented here. Further we describe an integral method for gratings with partial overcoated surfaces.
Abstract Cost effective loss prevention requires an optimizing strategy to prevent, moderate (relieve) and contain runaway reactions. Ensuring that an emergency relief system design will either avoid or accommodate two‐phase vapor‐liquid flow is of particular importance. Use of adiabatic runaway reaction test informat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnergy- and electron-transfer shuttling by a soluble, bifunctional redox polymerJanet N. Younathan, Wayne E. Jones Jr., and Thomas J. MeyerCite this: J. Phys. Chem. 1991, 95, 1, 488–492Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Publ…