Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNew Route to the Introduction of Axial and Helical Chiral Units into Poly(arylene ether)sZhi Yuan Wang and Judy E. DouglasView Author Information Department of Chemistry, Ottawa-Carleton Chemistry Institute, Carleton University, 112…
Pyro-carbon-coated fuel particles used in modular high-temperature gas-cooled reactor fuel rods have the potential to enhance fuel rod safety when they are packed in pressurized water reactor (PWR) fuel pellets. A fuel assembly design concept with new fuel pellets was introduced and its nuclear feasibility on PWR appl…
Abstract The distribution of clay minerals in recent sediments on the continental shelf and in the Bay of Cádiz has been analysed as part of a wider study of sedimentary exchange between the continent and the continental margin. The clay minerals included in the muddy sediments consist mainly of illite, kaolinite, sme…
Two high-molecular-weight organosoluble aromatic polyimides having the same diamine, 2,2′-(trifluoromethyl)-4,4′-diaminobiphenyl diamine (PFMB), but different dianhydrides, 2,2′-bis(trifluoromethyl)-4,4′,5,5′-biphenyltetracarboxylic dianhydride (HFBPDA) and 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6…
During the synthesis by flux evaporation in KC1 at 930°C of KCrIIPO4 an oxidation of chromium II was observed, leading to the formation of chromium pyrophophate KCrIIIP2O7. The crystal lattice of KCrIIIP2O7, was found to be of monoclinic centrosymmetric space group P21/c with a=7.3470(7), b=9.9090(10), c=8.1730(8)Å, β…
Polycrystalline thin LiF films thermally evaporated on amorphous substrates show different crystallite orientations depending on the substrate temperature during evaporation. The recording of direct diffraction pole figure shows that the LiF crystallites present a single crystal texture, which can be described as a 〈5…
Article The two-step phase transition of titanite, CaTiSiO5: a Synchrotron radiation study was published on December 1, 1997 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 212, issue 1).
Abstract We determined the decomposition equilibria of ammonium samarium chlorides (NH 4 ) 2 SmCl 5 and NH 4 Sm 2 Cl 7 by total pressure measurements and derived their thermody namical data from the decomposition functions. The enthalpies of formation were compared with the results of the solution calorimetry. The he…
X-ray powder diffraction data are reported for α-brass with the composition Cu: 63.44±0.04 wt %, Zn: 36.45±0.06 wt %. No valid reference card for this material is present in the JCPDS-ICDD database. The investigated brass composition is cubic ( Fm 3 m ) with a 0 : 3.69612±0.00014 Å, unit cell volume: 50.4938±0.0058 Å…
A passivation technique using highly concentrated ozone has been developed for electropolished stainless steel tubings that supply corrosive gases. The strong oxidizing ability of ozone enables the inner surface to form an anticorrosive passivation film with thickness up to 60 Å under room temperature and atmospheric…
Abstract During times of rising resin prices, the PVC processor is forced to optimize his operations in order to reduce manufacturing costs. One option the processor has is to increse the filler concentration in order to reduce formulation costs. Chlorinated polyethylene (CPE), an uncrosslinked rubber impact modifier…
The densification of lithium aluminosilicate glass‐ceramic composites strongly depended on dispersed 3‐mol%‐Y 2 O 3 ‐tetragonal‐ZrO 2 ‐polycrystal (3Y‐TZP) content, rather than the crystallization of a parent glass phase. Because of the reaction between 3Y‐TZP and the glass phase, tetragonal‐ZrO 2 transformed to monoc…
Abstract The size‐dependent breeding of sodium chlorate crystals can be determined by carrying out experiments with seed crystals of optical antipodes of different sizes that undergo absolutely identical experimental conditions. Small portions of right‐ and left‐handed seed crystals of different sizes were used. The n…
Describes the preparation and properties of heat‐resistant paints based on an epoxy blended with rhodorsil silicone resin. Studies the heat‐resistant properties as per ASTM standard (D 2485‐91). Also determines the properties of the liquid paint and coated metal panels. Assesses the thermal degradation of the coating…
Three monomeric Cd(II) phenoxide complexes have been prepared by reacting Cd[N(SiMe(3))(2)](2) with 2 equiv of 2,6-disubstituted phenols bearing sterically bulky tert-butyl or phenyl groups. The strongly coordinating solvents THF, tetrahydrothiophene (THT), and pyridine used for these reactions were incorporated into…
The characteristics, that is, morphology, size distribution, alloy phase and microstructure of U3Si and U3Si2 powders, solidified rapidly by a centrifugal atomization, were investigated. The atomized powders consist of spherical particles with a relatively narrow size distribution independent of the alloy composition.…
Abstract Hydrodynamics of foam films in a porous medium depend strongly on the pore geometry, foam quality, foam flow rate, surfactant formulation, rheological properties of the film, and the capillary pressure in the medium. These dynamics were studied numerically by simulating the behavior of a foam film as it trave…
QQC, Inc. has developed a revolutionary diamond deposition technique which does not require a vacuum, or H2, or “chemical” or physical pre-treatment of surfaces. The process utilizes a combination of various pulsed lasers and is performed at the laboratory p-t conditions: with CO2 and N2 as shrouding gases. Crystallin…
Magnetization measurements with a SQUID magnetometer have been carried out on a ferroelectric single domain sample along the three orthorhombic directions. The Néel (Curie) temperature was found at 26 ± 0.5 K and the spontaneous magnetization of the weakly ferromagnetic phase to lie along the orthorhombic b direction…
Cells of Cytophaga johnsonae (now Flavobacterium johnsoniae) are able to translocate on solid surfaces but are unable to swim in liquid media. Organelles that may be involved in this gliding motility have not been detected, and the mechanism(s) responsible remains unknown. The movement of latex beads attached to the c…