Materials Literature
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Analysis of the domain structure is performed using the method of matching strains at the interface and the model of thin domain walls. Equations describing the matching interlayers for crystal lattices are derived and the interlayer parameters are obtained for all possible types of domain walls in BiVO 4 . It is show…
Thick PNN-PZT films, about 25 μm, were successfully prepared by combining the screen printing and laser lift-off techniques. PNN-PZT films screen printed on sapphire substrate, after sintering at 1200°C (3 h), are secondary free perovskite, possessing good ferroelectric properties (Pr = 16.4 μC/cm2, Ec = 12.6 kV/cm).…
Cone-type and spherical lysine dendrimers up to generation 3 based on thiacalix[4]arene core units were successfully prepared and characterized in order to use as molecular scaffolds for supramolecular host systems.
The phenomenon of low-temperature homogenization (LTH) during interdiffusion is studied under condition a t Dv £ 2 / 1 ) ( (Dv is the bulk diffusion coefficient, a is the lattice parameter) using nano-objects of binary Cu-Ni and Cr-Ni systems compacted from nano-powders and produced by mechanical alloying. Two stages…
Relaxation of photo-generated carriers in anatase form of crystalline titanium dioxide has ben studied by the photoconductivity measurement. Illumination of anatase crystal with UV light at 300 K has found to induce persistent enhancement in conductivity over 3000 seconds. The magnitude of the induced change is 4000 t…
An asymmetric binary Margules formulation for excess Gibbs energy, enthalpy, and entropy is adequate to describe the 1 bar halite-sylvite solvus in NaCl-KCl (Thompson and Waldbaum 1969). However, a binary Margules formulation is not adequate to describe excess volumes of single-phase chlorides in P-V-T-X from ambient…
Changes in hydrogen distribution in δ-phase titanium hydrides (TiH1.92∼1.95), covered with titanium oxide layers (TiO and TiO2), were investigated by elastic recoil detection analysis (ERDA) after isochronal and isothermal annealing experiments. The hydrogen concentration near to the surface of the hydride exponential…
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…