Materials Literature
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Doped and undoped titanium dioxide films have been deposited on indium tin oxide glass using the sol-gel technique. The percentage of rutile in the prepared TiO2, calcined at 823 K and determined by X-ray diffraction, was 23% compared to 24% of rutile in P25-TiO2. Cerium doped TiO2 showed mainly the anatase phase, as…
While Pb(Zn1∕3Nb2∕3)O3–PbTiO3 (PZN-PT) single crystals have shown superior ferroelectric properties, less scientific and technical interests have been placed on PZN-PT polycrystalline ceramics due to their poor thermodynamic stability and the difficult processing conditions. Here, we stabilized the PZN-PT based cerami…
3D CFD Model of High Temperature H2O/CO2 Co-Electrolysis Grant Hawkes1, James O’Brien1, Carl Stoots1, Stephen Herring1 Joe Hartvigsen2 1 Idaho National Laboratory, Idaho Falls, Idaho, grant.hawkes@inl.gov 2 Ceramatec Inc, Salt Lake City, Utah INTRODUCTION A three-dimensional computational fluid dynamics (CFD) model ha…
Microscopic one-dimensional noninteracting model for the description of the energy spectrum of the ion subsystem in ionic conductor is considered. The processes of ionic hoppings are described in terms of Pauli operators. Time-dependent correlation functions b(t)b + (0) j in Pauli operators are obtained using the exac…
Abstract Using site‐selective and time‐resolved spectroscopy technique in combination with single molecular spectroscopy technique the concentration quenching of the 1 D 2 luminescence of Pr 3+ ions has been examined in Y 2 SiO 5 :Pr 3+ nanocrystals. The direct comparison of the data obtained for nano‐ and bulk Y 2 Si…
We investigated the thermal expansion properties of a component in order to develop a thermoelectric generating device using a Pb-Te system comprising PbTe doped with 0.5 wt%PbI2and Pb0.5Sn0.5Te, which were selected forn- andp-type legs, respectively, and Ni and Fe, which were selected for the electrodes. [1] The depe…
A fast magnetization reversal accompanied by a large Barkhausen jump in Vicalloy wires was studied. An alternating magnetic field having a frequency of less than 1 Hz was applied only to the center region of the wires. Measuring the position dependence of the pickup coil suggests nucleation and propagation of a revers…
Plasma-induced charging damage (PID) in a damascene interconnect process was investigated in detail. We found that the antenna area dependence of the PID in the damascene interconnect process is not a simple relation to the upper surface area of the metal wiring. Since the charges are injected through the dielectric f…
Liquid crystalline properties of the homologous series of 4-dodecyloxybenzylidene-4′-alkyloxyanilines are described. Nematic, smectic A, smectic C, smectic B and smectic I mesophases were detected. The influence of an alkyl chain length on the mesophase sequence and the entropic effects are broadly discussed. The unex…
The effect of surface anisotropy on the magnetization reversal in small magnetic particles is investigated. The model considers particles of cubic shape cut from a tetragonal crystal with cube faces in the (001) and equivalent planes. In particles having diameters of less than about 10 nm, the coercivity approaches th…
Abstract This paper presents a model of carbon dioxide corrosion in a steel straight pipe under turbulent flow, which includes protective iron carbonate film formation, film undermining, and film erosion. The flow field was discretized using a finite volume technique, with mass transport of dissolved species accounted…
Nucleophilic substitution of chlorine in tetrachlorophthalonitrile by the reaction with aryloxy anions is studied. Depending on the reactant ratio, the products of substitution of one, two, and/or three chlorine atoms are formed. Their tetramerization gives aryloxychloro-substituted phthalocyanines having the absorpti…
ldquoDevelopment for advanced thermoelectric conversion systemsrdquo supported by the new energy and industrial technology development organization (NEDO) has been successfully completed as one of the Japanese national energy conservation projects. Three types of the cascaded thermoelectric modules operating up to 850…
The effects of alumina particle size and content on densification of a low-temperature cofired crystallizable K 2 O–CaO–SrO–BaO–B 2 O 3 –SiO 2 (TG) glass+alumina system have been investigated. The densification is improved by decreasing alumina content, or increasing alumina particle size. This is attributed to compet…
A technological process of removing a complex-shaped ceramic core from the interior of GTE thin-walled blade castings is considered. We propose an aluminium oxide-based method for removing a core by leaching accompanied by process intensification with a carboxylic acid additive.
The effect of silica and calcium carbonate fillers on the properties of woven glass fibre composite has been studied with an attempt to observe the amount of property loss due to replacement of expensive resin by cheap fillers. The silica and calcium carbonate fillers of the amount 25% and 50% respectively of the weig…
Single crystals of different phases of misfit cobalt oxides have been synthesized. Using these materials, the intrinsic power factor has been determined. By combining thermopower S and Hall coefficient measurements, we will show how S can be tuned by doping in this family of materials, the doping being strongly depend…
The anticorrosion performance of the surface film on octadecylamine (ODA) treated iron in electrolytes containing chloride, sulphate and carbonate ions was studied by electrochemical impedance spectroscopy (EIS). The EIS measurements for iron samples treated with various ODA concentrations revealed that the highest co…
A compact X-ray tube with a field emitter based on carbon nanotubes is developed. Over a long time interval, the X-ray tube maintains an anode current of 300 μA, an anode voltage of 10 kV, and the stable characteristics of the field emitter.
Nanocompósitos de polietileno de alta densidade/argila bentonita foram preparados por meio da técnica de intercalação por fusão. Para a modificação da argila foram utilizados quatro tipos diferentes de sais quaternários de amônio visando a sintetizar argilas organofílicas. A argila não modificada e modificada com os q…