Materials Literature
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Core and valence band XPS spectra were obtained from a lead metal foil. The XPS data were collected with a VSW HA150 spectrometer equipped with a monochromatic Al Kα x-ray source and multichannel detector. The sample is a high purity lead foil (99.99%) that was cleaned prior to data collection by Ar-ion sputtering. Th…
Anthropometric data for the purpose of spectacle frame design are scarce in the literature. Definitions of facial features to be measured with existing systems of facial measurement are often not specific enough for frame design and manufacturing. Currently, for individual frame design, experienced personnel collect d…
Abstract Luminous properties of a red phosphor, Eu–Y2O3 (Eu-doped Y2O3) have been studied by 89Y (nuclear spin 1/2)-static NMR. Pure Y2O3 showed an anisotropic pattern with the peak centered at 299 ppm assigned to the Y atom in the site, where none of the 12 nearest neighbouring Y atoms are substituted by an Eu atom.…
Abstract Extruded thermoplastic sheet is widely used in the production of thin‐gauge tubs and containers for the food and beverage industry using the thermoforming process. The production of high quality thermoformed parts is critically dependent on the standard of extruded sheet feedstock used. The extrusion process…
Abstract A comparative study of NO and N2O decomposition over Cu/ZSM-5 and Cu/Y zeolites with various Cu loading levels has been carried out at 523—823 K. The Arrenhius plot of NO decomposition tended to level off above 773 K, as reported in the literature, while that of N2O decomposition was linear. It was noted that…
The structure and formation mechanisms of low-angle grain boundaries (LAGB) in chlorite have been investigated using HRTEM to resolve each cation sheet in chlorite. The LAGB are abundant in two hydrothermally formed ferromagnesian chlorite specimens. Abundant LAGB, which are almost parallel to (001), divide chlorite g…
The mesogenic 4,4′-bis[4-(n-octyloxy)benzoyloxy]azobenzene (HL) ligand reacts with [(PhCN)2PdCl2] to give the dinuclear cyclometalated complex [(μ-Cl)(L)Pd]2 (1), from which the mononuclear half-sandwich [(η5-C5H5)(L)Pd] (2) species has been obtained by reaction with Tl(C5H5). The PtII analogue of 2, [(η5-C5H5)(L)Pt]…
The room‐temperature tensile strengths of chemically‐vapor‐deposited SCS‐6 silicon carbide fibers were measured after 1 to 400 h heat treatments in 0.1 MPa of argon at temperatures up to 2100°C. The fibers heat‐treated for 1 h above 1400°C and those heat‐treated for 400 h above 1300°C showed strength degradation. Scan…
A series of Mo/TiO2 catalysts was prepared by equilibrium adsorption from aqueous solutions of (NH4)6Mo7O24 by varying the pH of the solution from 9.8 to 4. The Mo loading increases from 0.8 to 3.6 wt.% as the pH of preparation decreases. The surface coverage of the calcined catalysts was monitored by CO2 chemisorptio…
Barium titanate ceramic samples of four different average grain sizes from 0.5 µm to 20 µm were studied by means of the ac calorimetric method. The ferroelectric-to-paraelectric transition temperature decreased with decreasing grain size. The temperature dependence of heat capacity showed hysteresis during a heating/c…
Several charge-transfer (CT) complexes derived from 1,5-diphenyl-3-(p-substituted-phenyl)- verdazyl radicals and TCNQF 4 (2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane) or DDQ (2,3-dichloro-5,6-dicyano-1,4-benzoquinone) were prepared and their magnetic properties were investigated. The X-ray crystal structural…
Abstract A computer‐based method is described for the determination of the interfacial tension between pendant and sessile drops in a surrounding continuous phase. This has been used to determine the effect on interfacial tension of increasing amounts of aliphatic alcohols, from methanol up to n‐octanol, equilibrated…
The crystal structure and thermal displacement parameters of potassium hexachloroplatinate, K 2 PtCl 6 , have been studied as functions of temperature between 8 and 380 K, using four single crystal neutron diffraction, five single crystal X-ray diffraction and two neutron powder diffraction data sets. Third-order anha…
Low cycle fatigue properties of zirconium and zircaloy-4 were investigated at RT and 400°C. The microscopic structure was determined using scanning electron microscopy and transmission electron microscopy techniques. On the basis of analyses of fatigue damage mechanism, it is believed that fatigue is an irreversible e…
Abstract An indolyfulgide has been trapped in a hybrid organic-inorganic matrix prepared by the sol-gel process using methyltriethoxysilane. Photochromic properties of doped films have been studied.
A phenomenological theory is developed for uniaxial and biaxial nematic phases, based on a two component tensor order parameter. Phase diagrams are plotted and investigated in the plane of two thermodynamic parameters. Anomalies in thermal properties are studied in the vicinity of an isolated four-phase critical point…
An algorithm was developed in which galvanostatic regulation of electrochemical impedance measurements is conducted with an amplitude of current perturbation that is adjusted at each frequency to yield a desired variation in potential. Measurements of three previous frequencies are used to estimate the value of the im…
Chromium based ODS alloys are being discussed as interconnector materials in solid oxide fuel cells (SOFC's). One of the major requirements for the interconnect material is sufficient corrosion resistance in the anode and cathode side gases at the operating temperature of around 950°C. In the present study the corrosi…
The in vitro antiproliferative activity and in vivo phototoxicity of some methyl derivatives of 5-methoxypsoralen and 5-methoxyangelicin, i.e. 4,4'-dimethyl-5-methoxyangelicin (compound I), 3,4'-dimethyl-5-methoxyangelicin (compound II), 4,4'-dimethyl-5-methoxypsoralen (compound III); and 3,4'-dimethyl-5-methoxypsoral…
The effect of carburisation on the ductility in terms of Charpy V-notch impact energy of five nickel-base alloys (alloy 45-TM, alloy 600H, alloy 617, alloy 601 and alloy 602CA) and three iron-nickel-chromium alloys (alloy 800H, alloy AC66, alloy DS) with different concentrations of aluminium, chromium and silicon was…