Materials Literature
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An approximation formula of buildup factor for two-layer shields proposed previously was improved to fitting to the newly calculated buildup factors for point isotropic source gamma-rays of 0.1, 0.3, 0.6, 1,3,6 and 10 MeV penetrating two-layer shields combinations of water, iron or lead materials with the Monte Carlo…
New powder X-ray diffraction data of Ca 12 Al 14 O 32 F 2 (C11A7f), a cementitious compound, were collected on a conventional X-ray powder diffractometer; the cubic cell parameter is a =11.96269(6) Å, volume 1711.93(2) Å 3 (space group I -43 d (No. 220)). The strongest lines are 4.887(100), 2.676(95), 2.992(46), 2.443…
A gap streaming experiment was performed by using a D-T neutron source at FNS/JAERI as the ITER/EDA R&D Task T-218, in order to examine the streaming effects due to gap between shield blanket modules in ITER. The experiment had three phases. The first one defined neutron source characteristics (Source Characterization…
X-ray photoelectron spectroscopy and x-ray excited Auger electron spectroscopy have been used to investigate the electronic core levels of mercury chalcogenophosphate HgPS3 and HgPSe3 single crystals. On the basis of the measured chemical shifts relative to the elements information on the bonding state of the composit…
Effects of hydrodynamic interactions in the formation of lamellar patterns in thin block copolymer films are studied. We derive the phase diffusion equation, and the stability analysis reveals the development of the skewed-varicose instability. Moreover, we predict by means of numerical simulations that the hydrodynam…
The hydrothermal processing conditions of strontium tungstate powders were studied by using a thermodynamic model of electrolytic solutions in order to avoid the empirical trial-and-error mode of synthesis. The approach used makes possible to predict the optimum conditions through stability and yield diagrams, relatin…
Dipolar interaction between the metal ion and proximate water molecules represents an efficient mechanism for solvent relaxation in Gd3+ complexes currently employed as MRI contrast agents. Besides inner sphere (metal bound) and outer sphere hydration molecules, a well-defined second coordination shell may provide an…
Article Crystal structure of distrontium lanthanum gallium pentaoxide, Sr2LaGaO5 was published on March 1, 2000 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 215, issue 3).
X-ray diffraction and thermomechanical analysis have been used, respectively, to examine structural order and shrinkage behaviour for oriented samples of rigid and flexible poly(vinyl chloride) (PVC). Results were compared with previously measured tensile properties and structure–property relationships explored. X-ray…
Tungsten bronze Sr0.5Ba0.5Nb2O6 nano-powders and thin films on platinum, Si(100), and sapphire substrates were prepared by the sol-gel route and characterized by x-ray diffraction and micro-Raman scattering techniques. The transparent and crack-free films crystallized into an orthorhombic phase at 700°C. Annealing of…
A systematic study was conducted of pure Na3PO4 and solid solutions of Na3PO4 doped with Mg2+ and Zn2+. Na3PO4 has two solid phases: a low-temperature tetragonal phase and a high-temperature cubic phase. A factor group analysis of the two phases yielded the expected number of modes and their symmetry-based assignments…
The structure, dielectric, ferroelectric and electromechanical properties of lead lutecium niobate-titanate (PLuNT) and lead erbium niobate-titanate (PErNT) binary systems are reported. The data of phase diagram, crystallographic symmetry and morphotropic phase boundaries (MPB) are provided. High values of the electro…
The pitting corrosion behaviour of carbon steels with different banded microstructures has been investigated in chloride solutions using the in situ scanning reference electrode technique (SRET). The specimen surfaces were inspected with an optical microscope after SRET measurements and the variation of potential over…
In the ferroelectric SmC* phase of antiferroelectric liquid crystal in planar geometry, a new contribution to the electro-optical and dielectric responses was found. This mode which we propose to be called a “surface layer mode'', appears with the apparition of 2π-disclinations (dechiralization lines) in the texture.…
Nacrite, a two-layer polytype of kaolin (space group C c ) generally formed at high temperature, was found in the Lodeve Basin, France. It occurs in dolomite cavities in the Cambrian basement of the Permian basin, as authigenic, euhedral, up to millimetre-sized crystals, associated with barite deposits of hydrothermal…
This Resource Letter provides a tutorial on bubble and cavitation dynamics and an introduction to its extensive literature.
Abstract The different rates of smectite illitization have been investigated in interbedded sandstone and mudstone samples from the Neogene to Lower Pleistocene stratigraphy of the Niigata sedimentary basin. For samples of approximately the same age and under the same temperature and pressure conditions, the analytica…
Boronated graphite specimens were prepared from a grafoil heat-treated at 3000°C for 30 min. The transport properties, such as the electrical resistivity, Hall coefficient and transverse magnetoresistance, and the total magnetic susceptibility were measured for the pristine and boronated specimens. For the specimen wi…
The mechanism of porous silicon (PS) film growth remains a debate among researchers. This study investigates the effect of current density (J) and anodization time (t) on the film thickness, optical properties, and microstructure of films grown at low current densities. The samples reported herein were generated from…
Because optical buffing can achieve aligning patterns with different azimuthal angles of the liquid crystal directors, photoalignment appears to be a very hopeful technique for designing complex LCD structures. Until recently, most photopolymers provided low anchoring and/or low tilt angles which are unsuitable for in…