Materials Literature
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Nanosized SrCe0.95 Y0.05O3-δ powders with homogeneous composition were synthesized by the low temperature combustion process based on the Pechini method. A polymeric precursor sol was formed by using citric acid and ethylene glycol as the chelating agents of metal ions. The perovskite-type SrCe0.95Y0.05O3-δ powders wi…
The α alloy Ti-2Al-2.5Zr and near α alloy Ti-4Al-2V were hydrogenated to various levels. The morphology, orientation relation (OR), and habit plane of the hydrides were studied by means of transmission electron microscopy (TEM). It was found that in the two alloys most of the precipitates are δ-hydrides which have fcc…
Abstract Paratooite-(La) is a new lanthanum-dominant rare-earth copper carbonate from the Paratoo copper mine, near Yunta, Olary district, South Australia. Paratooite-(La) occurs as sheaves and radiating sprays of blade-like to tabular pale blue crystals in thin fissures in a slaty country rock. Individual crystals ar…
A study of surface modification and anchoring techniques
An analytical study on excitation of acoustic waves and novel properties introduced by considering that the implanted ions in a group III-V crystal agglomerate to form nanoclusters (NCs) and some of them acquire negative charge in compensated piezoelectric semiconductor plasma has been presented. By using multi-fluid…
The rate of decomposition of formic acid on a glassy-carbon-Nafion-polyaniline-palladium nanoparticle composite as a function of the state and amount of polyaniline in the composite is studied.
Nous avons resolu la structure cristalline de la kirkiite avec donnees obtenues sur monocristal avec un rayonnement MoKa et un detecteur a aire de type CCD, jusqu'a un residu R 1 de 0.069. Elle cristallise dans le groupe spatial P2 1 /m, avec a 8.621(4), b 26.03(1), c 8.810(4) A, β 119.21(1)° et Z= 2. L'ebauche de la…
A new optical data storage media has been developed, which allows three-dimensional serial data storage and retrieval by two-photon excitation. The disk is essentially of a monolithic structure, and utilizes a proprietary photochromic organic fluorophore as the data storage element. This new data storage chromophore h…
A mathematical model was constructed and solved to quantitatively describe the dynamic behavior of the potassium sorbate diffusion through whey protein films. The model results were compared with the experimental data of the potassium sorbate diffusion through whey protein films, and excellent agreements between the e…
The angular distortion around the impurity Ti 3+ on the trigonal (2a) Al 3+ site of LaMgAl 11 O 19 is theoretically studied from the perturbation formulas of the anisotropic g factors, g || and g ⊥ , for a 3d 1 ion in trigonally distorted octahedra. Based on the studies, the metal-ligand bonding angle is found to incr…
Resistance as a function of temperature showed that the metal–insulator transition temperatures of as-grown and annealed Ag-doped La 0.67 Ca 0.33 MnO 3 thin films were 235 and 300 K, respectively, and that the metal–insulator transition ranges of these films were relatively narrow, indicative of a sharp phase transiti…
Self-assembling of Mg and oxygen isoelectronic impurities in ZnS is presented. The occurrence of the 1O4Mg tetrahedral cells is predicted in ZnS-rich MgxZn1−xOyS1−y (x⩾4y) in the ultradilute oxygen impurity limit. Under certain conditions that are estimated for the lower growth and higher annealing temperatures of 300…
Using hydrodynamic model of inhomogeneous plasma, an analytical investigation of excitation of acousto-electric mode was made in n-type piezoelectric ion-implanted semiconductor plasma. By employing the multi-fluid balance equations along with the elastic and Maxwell equations, a compact dispersion relation for the ca…
The lamination of the core in thin film magnetic components is necessary to reduce the eddy current losses of the structure at high frequencies. The usual way to achieve lamination of the core is by physical vapor deposition (PVD) techniques. These methods are however costly and the deposition of layers is non selecti…
The characteristics of a nonlinear magnetoacoustic resonator are studied. The resonator is fabricated from an antiferromagnetic hematite (α-Fe 2 O 3 ) monocrystal. The amplitude-and phase-bistability loops are investigated experimentally when an exciting signal has a cyclically variable frequency and a fixed power or…
Abstract The title compounds 6 and 7 were synthesized in good yield ( Schemes 1 and 2 ), and their mode of assembly was studied both in solution, for the tetrakis(decyloxy) derivative 6 , and in the crystal, for the tetramethoxy analogue 7 . The pyrimidin‐2‐amine moieties of 6 and 7 can engage in three different supra…
A low energy electron diffraction (LEED) instrument incorporating a delay line detector has been constructed to rapidly collect high-quality digital LEED images with low total electron exposures. The system uses a position-sensitive pulse-counting detector with high bias current microchannel plates. This delay-line de…
The naturally occurring sodium and calcium cations found in bentonite clay galleries were exchanged with lithium cations. Following the cation exchange, a series of reduced charge clays were prepared by heat treatment of the lithium bentonite at 130, 150, or 170°C. Inductively coupled plasma analysis showed that heati…
Electroluminescent structures that emit in the visible region of the spectrum and are based on porous silicon ( por -Si) formed on the p -Si substrate electrolytically using an internal current source are fabricated. The photoluminescent and electroluminescent properties, as well as the current-and capacitance-voltage…
This paper presents recent achievements in field theoretical approach toward substantial linkage among key hieratical scales dominating polycrystalline plasticity of metals and alloys. Major ingredients of the theory are briefly shown first, which is followed by several overwhelming results and some implications in- c…