Materials Literature
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The Harman method, which is generally utilized in the evaluation of the figure of merit, Z, has been improved to measure several thermoelectric properties. We fabricated equipment for simultaneous measurement of not only the resistivity /spl rho/ and Z but also the Seebeck coefficient /spl alpha/. The thermal conducti…
Decomplexation of organic ligands through redox titration has been applied to catalyst synthesis, developing an improved preparation method for Fe-ferrierite (Fe-FER), the catalyst showing excellent performance and durability for N2O decomposition under realistic conditions for nitric acid plants.
Single crystalline beta-Ga2O3 nanowire and nanoribbon materials were synthesized, and electrical and mechanical properties were studied for sensing applications. The structural analysis showed that the Ga2O3 nanomaterials were stoicheometric and had the same crystal lattice structure as the beta phase Ga2O3 crystal. T…
The process of vegetable tanning is hindered by the astringency of the tannins, which affects the development of their use as organic tanning agents for modern purposes. The use of non tans, either from natural sources such as green tea or by degrading tannins into non tannins, avoids the problem of hindered penetrati…
The relationship between energy requirement and barrier properties in the production of greaseproof paper
A high temperature super-conducting transformer (HTST) has been built. It has been designed to operate in liquid nitrogen, an environmentally benign element that represents little fire and personnel safety risk. The transformer is based on the concept of a partial or open core, where the magnetic circuit is incomplete…
We describe a new NIST database for the Simulation of Electron Spectra for Surface Analysis (SESSA). This database provides data for the many parameters needed in quantitative Auger electron spectroscopy (AES) and X‐ray photoelectron spectroscopy (XPS). In addition, AES and XPS spectra can be simulated for layered sam…
Artificially creviced Alloy 22 (N06022) is susceptible to crevice corrosion in presence of high chloride aqueous solution when high temperatures and high anodic potentials are applied. The presence of oxyanions in the electrolyte, especially nitrate, inhibits the nucleation and growth of crevice corrosion. Crevice cor…
In this contribution, the degradation of solid oxide fuel cells (SOFC) is accelerated by means of high current load cycles. The ageing phenomena are studied and characterised by material analyses. The results show that degradation of cell performance is mainly caused by the delamination of the cathode layer. The accum…
Kompositwerkstoffe aus Diamant und Siliciumcarbid sind in ihrem Anwendungsumfang gegenwärtig wegen der hohen Herstellungskosten begrenzt. In diesem Beitrag werden experimentelle Untersuchungen vorgestellt, die die Basis für eine andere Herstellungsmethode bilden. Statt durch hohen Druck wird der Kompositwerkstoff durc…
Mathematical modeling aiming at SOFC design and operating condition optimization is conducted at the Forschungszentrum Jülich. Computational Fluid Dynamics (CFD) software is used for three dimensional (3D) stack modeling and a rapidly executing self-written one dimensional (1D) code for calculating "along-the-channel"…
The title compound, [La(BTC)(H2O)6]n 1 (H3BTC = benzene-1,3,5-tricarboxylic acid), has been synthesized by the hydrothermal reaction of La(NO3)3?3H2O with H3BTC and Na2CO3, and its structure was determined by single-crystal X-ray diffraction. The crystal structure is of monoclinic, space group Cc with a = 11.5289(3),…
Electrical field and stress distribution calculation was made on two typical 500kV rod composite string insulators with similar working conditions using limited element processing. The results shows severe field distortion at conductor and earthing top of insulator which stress is in more than 10 times higher than at…
The characteristics and components of textures in magnesium alloys were presented. The mechanism of the formation and evolution of textures during plastic deformation such as extrusion, rolling, equal channel angle extrusion processes and annealing were reviewed, followed by the analysis of the effects of textures on…
Al2O3-doped ZnO (AZO) thin films have been deposited onto glass substrates using a split target consisting of AZO (1 wt%) and AZO (2 wt%) by pulsed laser deposition with an ArF excimer laser (λ = 193 nm, 15 mJ, 10 Hz, 0.75 J/cm2). By applying a magnetic field perpendicular to the plume, the lowest resistivity of 8.54…
Abstract A well characterised grade of mica was used to prepare nickel‐coated mica fillers by an electroless coating technique. These fillers were incorporated into polypropylene (PP) and acrylonitrile‐butadiene‐styrene (ABS) using a Haake Internal mixer and a two‐roll mill to produce conducting composites suitable fo…
Phase change RAM (PRAM) is a promising memory that can solve the problems of conventional memory - scalability, write/read speed and reliability. The process technologies for the integration of high density PRAM are reviewed. The most important challenge of PRAM is the reduction of writing current. Various approaches…
Abstract In former studies of the preparation of polypropylene(PP)‐clay nanocomposites, different types of layered silicates were used. However, the obtained results were not comparable due to different preparation conditions and types of silicates. The aim of this work was the investigation of the influence of differ…
The influence of undersized solute additions on radiation-induced segregation (RIS) at grain boundaries was examined for austenitic model alloys. High-purity Fe-15Cr-20Ni alloys, doped with either 0.5 mass% silicon or 0.025 mass% phosphorus, were exposed to electron irradiation at several temperatures in a high-voltag…
It is well known that water tree propagation in XLPE cable is significantly influenced by inorganic impurities in water. Therefore, we investigated both changes in concentration and deviation of isotopic content of inorganic elements in XLPE samples by water tree experiments in a clean environment. The concentration o…