Materials Literature
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Half-Heusler compounds TiCoSb, ZrCoSb, HfCoSb were prepared by a spark plasma sintering (SFS) technique. Their thermoelectric and thermophysical properties were measured. The band gap energy estimated from the electrical resistivity becomes small in the following order: TiCoSb (0.16 and 0.40 eV), ZrCoSb (0.14 eV), HfC…
A fully aromatic unfluorinated polyimide (PI) exhibiting high transparency in the visible region and small thermal expansion was designed and prepared. The formation ability of charge transfer (CT) interactions in PIs estimated using the density functional theory clarified that polychlorine-substituted benzidines shou…
The syntheses of new ceramic superionic materials based on Bi 2O3 (BIMEVOX and δ-Bi2O3), their elemental analyses, thermodynamical stability, and electrical properties are presented. The materials show high ionic conductivities (ca. 0.1 S/cm) at a relatively low temperature (600 °C), which makes them applicable as ele…
IHI is currently investigating applications of thermoelectric conversion systems based on the usage of radiant heat for industrial furnaces. The thermoelectric module units, which have been connected to a water-cooled jacket wall inside an electric resistance-heating-type industrial furnace, receive the heat originati…
Using π-orbital tight-binding model, we investigate the transport properties of a coiled carbon nanotube (also called carbon nanotube spring), which we construct by connecting carbon nanotubes periodically in three-dimensional (3D) space. Theconductance is quantized due to the translational symmetry in the coiled dire…
The effects of nickel content and heat treatment conditions on the creep strength of precipitation-strengthened 15Cr ferritic steel were investigated. The creep strength of the 15Cr ferritic steel was drastically improved by solution treatment and water quenching. However, over the long term, the detrimental effect of…
In situ acoustic emission (AE) was coupled with linear-sweep voltammetry from anodic to cathodic potentials to study 5N5-aluminum behavior in 4 M aqueous potassium hydroxide solution. We clearly highlight a correlation between the AE and electrochemical signals. Moreover, the different types ( e.g. , in terms of frequ…
Heat stress responses are analyzed in cancer cells by applying different microscopy techniques for targeting various fluorescently labeled or native structures. Thermotreatments are performed at 40, 45, 50, and 56 degrees C, respectively, for 30 min each, while controls were kept at 37 degrees C. Actin cytoskeletons l…
Six polyaromatic amines, polyaniline, poly(o-toluidine), poly(m-toluidine), poly(m-anisidine), poly(2-aminopyridine), and poly(2-amino-6-methylpyridine), have been prepared by the chemical oxidation of their monomers using potassium persulphate. These polymers were incorporated into styrene-butadiene rubber (SBR) mixe…
A simple theoretical model based on electric-field-assisted growth and dissolution of the barrier oxide has been proposed to understand the mechanisms for formation of a one-dimensional (1D) anodic aluminum oxide (AAO) nanopore array. It is shown that formation of a one-dimensional horizontal nanopore array is the nat…
The reforming behaviors of hexane and isooctane were studied using microwave steam plasma under atmospheric pressure without additional plasma supporting gas. The experimental results showed that the reforming process for both hydrocarbons was rapid and that the product gas consisted predominantly of hydrogen and carb…
We have been examining the effects of superposition of a high-frequency voltage to various voltages such as dc, low-frequency (0.1 to 5 Hz), and power-frequency voltages on the development of water trees in polyethylene. We have made clear that the number of voltage zero-crossings is a decisive factor in the length of…
An unusual k = [½ ½ ½] magnetic structure is reported in Sr2FeO3F at low temperature. The magnetic structures of LaBaFeO4, LaSrFeO4, LaCaFeO4, Ca2FeO3Cl, Ca2FeO3Br, Sr2FeO3F, Sr2FeO3Cl, Sr2FeO3Br and solid solutions in the series Sr2Fe1−xCoxO3Cl have been examined and only Sr2FeO3F exhibits this structure. The La2CuO4…
In this paper, we investigate the polyvinylferrocene (PVF) redox behavior in contact with a bathing solution containing L -glutamine (Gln) by electrochemical quartz crystal microbalance (EQCM). Our study shows that the interaction of PVF with Gln is dramatically different from PVF redox behavior in salt solutions, e.g…
Several stainless steels have been developed for the use as interconnect materials in solid oxide fuel cells in order to reduce costs, while maintaining the required performance. The materials however, are subjected to humid air, at high temperatures up to 800°C leading to enhanced oxidation. High temperature X-ray di…
Estimates of the rate of heat loss from animals to the environment are used to determine food requirements ofdomestic species in relation to weather or their need for shelter, and to establish the extent to which climate influences thebehavior and distribution of wild species. A mechanistic model was developed to pred…
This work reports on the investigation of nanosized CeO2-ZnO systems prepared by Pechini's method. The structural and morphological characterization of CeO2-ZnO systems as well as the characterization of CeO2 and ZnO separately, showed that the employed method result in powders with spheroidal particles whose size are…
During the first stage of a multi-year research program, BAE SYSTEMS and Ovonyx have designed, fabricated and tested a series of test chips to demonstrate full integration of a chalcogenide-based non-volatile memory element into a radiation hardened CMOS process. The test structures range from simple two- and four-poi…
Morphology- and size-controlled nickel powder was synthesized via the thermal decomposition of nickel oxalate, which was prepared by mixing a solution containing nickel chloride hexahydrate (NiCl2·6H2O) and aqueous ammonia (NH3·H2O) with a solution of sodium oxalate (Na2C2O4) under controlled conditions. Nickel precur…
An 800 nm-SiC powder (75 vol%) was mixed with a 30 nm-SiC powder (25 vol%) in a 0.05-0.3 M-Y(NO3)3 solution containing an Al2O3 powder of median size 0.2 μm at pH 5 to distribute homogeneously the sintering additives (Al2O3+ yttrium ions) around the SiC particles. In a 20 vol% SiC suspension, the network structure of…