Materials Literature
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High‐resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM) were used to investigate the structure and chemistry of (0001) α‐A1 2 O 3 / A1 interfaces in melt‐infiltrated polycrystalline alumina composites. HRTEM revealed an interfacial region different from both Al and α‐A1 2 O 3…
Slica‐based composite materials incorporated with a terbium bipyridyl complex, SiO 2 : Tb ( bpy ) 2 3 + , were prepared by a sol‐gel method. The thermal stability of Tb ( bpy ) 2 3 + was improved by incorporation into the silica matrix, and its green emissiom lines were intensified by heat‐treatments under appropriate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-Layered Carbon Nanotubes Synthesized by Catalytic Assistance of Rare-Earths in a Carbon ArcYahachi Saito, Kenichiro Kawabata, and Mitsumasa OkudaCite this: J. Phys. Chem. 1995, 99, 43, 16076–16079Publication Date (Print):October 1, 1995Publication History Published on…
A novel solid oxide fuel cell (SOFC) system, which does not need to separate the supply of fuel and oxidant gases and generates electric power as well as chemicals, was studied. The fuel cell consisted of Pt | BaCe 0.8 Y 0.2 O 3 − α | Au , in which two electrodes were exposed to the same mixture of CH 4 and air. Elect…
Low-frequency Raman spectra of metaphosphate glasses (${\mathrm{Sm}}_{2}$${\mathrm{O}}_{3}$${)}_{\mathit{x}}$(${\mathrm{P}}_{2}$${\mathrm{O}}_{5}$${)}_{1\mathrm{\ensuremath{-}}\mathit{x}}$, (${\mathrm{Eu}}_{2}$${\mathrm{O}}_{3}$${)}_{\mathit{x}}$(${\mathrm{P}}_{2}$${\mathrm{O}}_{5}$${)}_{1\mathrm{\ensuremath{-}}\mathi…
Magnetotransport measurements of high-quality single crystals of ${\mathrm{La}}_{0.6}{\mathrm{Pb}}_{0.4}\mathrm{Mn}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ and ${\mathrm{Nd}}_{0.6}{({\mathrm{Sr}}_{0.7}{\mathrm{Pb}}_{0.3})}_{0.4}\mathrm{Mn}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ show a close relati…
Abstract Wetting of glass fibers was visualized using an oil with the same refractive index. With both a video‐enhanced microscope and a high‐magnification video camera we followed the flow front and qualitatively measured the entrapped air bubbles by image analysis. Due to different permeabilities between the fiber m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat and Mass Transfer Effects in Multistage Polymerization Processes: Impact PolypropyleneJon A. Debling and W. Harmon RayCite this: Ind. Eng. Chem. Res. 1995, 34, 10, 3466–3480Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published i…
The article describes the ESCA microscopy beamline dedicated to high spatial resolution quantitative and qualitative analysis on surfaces and interfaces. The scanning microscope is constructed to work both in transmission and photoemission within the photon energy range from 200 to 1200 eV with a spatial resolution of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Study of Decavanadate-Pillared Hydrotalcite-like Anionic Clays Containing Transition Metal Cations in the Layers. 1. Samples Containing Nickel-Aluminum Prepared by Anionic Exchange and ReconstructionF. Kooli, V. Rives, and M. A. UlibarriCite this: Inorg. Chem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexanuclear and Dodecanuclear Macrocyclic Copper(II) and Nickel(II) Complexes with Almost Planar "Benzene-like" Metal ArraysSantokh S. Tandon, Laurence K. Thompson, J. N. Bridson, and Cristiano BenelliCite this: Inorg. Chem. 1995, 34, 22, 5507–5515Publication Date (Print):Oc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsotropic and Anisotropic Magnetic Exchange Interactions through .mu.-N1,N2 1,2,4-Triazole and .mu.-Sulfato Bridges: X-ray Crystal Structure, Magnetic Properties, and Single-Crystal EPR Study of (.mu.-4-Amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole-N',N1,N2,N'')(.mu.-sulfato-O,…
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Abstract A new class of SEM has evolved over the past few years which provides some startling capabilities never before available to electron microscopists. These instruments, typically referred to as environmental SEMs or variable pressure SEMs. have opened up a host of new applications that are difficult or impossib…
The tautomerism of 5-hydroxytetrazole is discussed on the basis of its fragmentation patterns and molecular orbital calculations by MNDO and PM3 methods.The calculated results of the fully optimized structures of 5-hydroxytetrazole and radical cations indicate that, in the gaseous phase, the enol form is energetically…
Extensive experience with the refilling of the Amersham Mk IV 1.85 PBq uranium pots has shown that helium-3 resident in the uranium matrix causes “blanketing” of the metal surface and subsequent operational problems. This paper reviews the operational procedures and results observed at Ontario Hydro’s dispensing facil…
Partial molar densities of oxides in natural silicate melts can be estimated to useful precision by exploiting their strong correlation with densities of the corresponding solid oxides, reflecting the close structural similarity between silicate solids and silicate melts. Using this extrapolation method, partial molar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethane Elimination During Silation of Partially Dehydroxylated .gamma.-AluminaStefan V. Slavov, Karl T. Chuang, and Alan R. SangerCite this: Langmuir 1995, 11, 10, 3607–3609Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published iniss…
Four Si‐based ceramics—siliconized SiC (Si‐SiC), sintered α‐SiC, and two grades of SiC‐particulate‐reinforced A1 2 O 3 —were exposed to a typical western coal ash with high calcium content (Wyodak) and a typical eastern coal ash rich in iron (Illinois #6) at two temperatures for 300 h in a muffle furnace. After exposu…
An upgraded version of a metal hydride based clean-up systema for tritium gloveboxes has been recently designed. An earlier version of a prototypical, recirculating system has been under evaluation in tritium service at OHT for nearly 2 years. A metal getter alloy, Zr2Fe, is used to remove tritium and trace impurities…