Materials Literature
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Processes of mechanical alloying of oxide-dispersion-strengthened reactor pressure-vessel steels by cold high-pressure torsion of a powder mixture of low-stable Fe 2 O 3 (Fe 3 O 4 ) iron oxides and the bcc matrix alloyed with Y and Ti have been investigated using Mössbauer spectroscopy, X-ray diffraction analysis, and…
Abstract Cobalt (II) and Al (III) layered double hydroxides were precipitated from homogeneous solutions using urea hydrolysis under hydrothermal conditions. The particle sizes were controlled successfully by changing the reaction temperature and period. It was found that larger particles formed by reactions at lower…
To increase the switching stability of switchable mirrors based on Mg–Ni alloy thin films, we inserted a thin Ti buffer layer between a Mg–Ni alloy thin film and a Pd top layer, which were prepared by DC magnetron sputtering. The optical properties and switching durability of the Ti-inserted switchable mirrors were in…
Monophase intergrowth Bi3TiNbO9–Bi4Ti3O12 (BTN-BIT) ceramics were synthesized by solid-state reaction method. In the temperature dependence of dielectric permittivity, two anomalies appeared at 945 and 1114K, respectively. The ferroelectric hysteresis loop measurement revealed that the 2Pr is 20μC∕cm2, nearly as twice…
Pb Zr 1 − x Ti x O 3 (PZT) is one preferred ferroelectric material being used in nonvolatile ferroelectric random access memory devices. The use of oxide electrodes like IrO2 or SrRuO3 (SRO) is necessary to suppress the serious loss of polarization due to bipolar voltage cycling. Although, there are a number of models…
Low density polyethylene (LDPE) was melt-compounded with MgO nano-fillers to produce LDPE/MgO nanocomposite. Its partial discharge (PD) resistance was evaluated by using a rod-to-plane electrode system. Erosion depth was measured as an index of PD resistance. Permittivity and tan delta were also measured to investigat…
The cross-section of products made with the microcellular injection molding process shows the skin layer and the core region where the formation of pores takes place. The cell size, cell density, and cell morphology were found to depend on pressure drop rate, viscosity, cell growth period, and cell coalescence. Howeve…
Computer simulations of domain structure were performed within the continuous phenomenological time-dependent Ginzburg–Landau–Devonshire model including electrostatic long-range interactions. Calculations are done on cube or rectangle area blocks with periodic boundary conditions, employing the previously proposed met…
The onset of water gelation around a collagen-like triple helix peptide was studied at ambient temperature and pressure by performing Molecular Dynamics simulations. The radial distribution functions of the oxygen and hydrogen atoms of water are distorted below 4 A from the peptide. The distortion is accompanied by th…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTNovel Synthesis of Poly(3-hydroxybutyrate)Maria Juzwa and Zbigniew JedliñskiView Author Information Centre of Polymer Chemistry, Polish Academy of Sciences, 34 Curie-Skłodowska Str., Zabrze, Poland Cite this: Macromolecules 2006, 39, 13, 4627–4630Publication Date (Web):June 2,…
With the plate‐impact technique, ductile spallation experiments are carried out on Ta at impact velocities 570, 1039 and 1078 m/s. Samples are soft‐recovered and analyzed by X‐Ray microtomography at the European Synchrotron Radiation Facility. The porosity along the shock direction, and the distribution of the pore vo…
Since 1991, Korea, Canada and United States have performed the direct use of spent pressurized water reactor (PWR) fuel in the Canada deuterium uranium (CANDU) reactors (DUPIC) fuel development project. Unlike the Tandem fuel cycle, which requires a wet reprocessing, the DUPIC fuel technology can directly refabricate…
A novel time-dependent percolation transition has been observed in sheared carbon nanotube (CNT) composites. At a fixed CNT filler loading, the electrical conductivities of CNT composites can change abruptly as much as 8 orders of magnitude as the shear processing time increases. Microstructure characterization shows…
Carbon nanowalls (CNWs) are synthesized under pure methane gas (CH 4 ) using helicon plasma-enhanced chemical vapor deposition. CH 4 in the helicon discharge is effectively dissociated to hydrogen atoms and hydrocarbon radicals, resulting in the formation of CNWs on a Ni substrate only from CH 4 . CNWs are grown up at…
Sodium germanate glasses are well-studied materials in which, unlike silicates but analogous to borates, the major structural consequence of alkali addition is generally thought to involve a coordination number increase of the network-forming Ge cations. However, the nature of this change, in particular quantifying fr…
Abstract The characterization of topsoils has recently received enhanced attention, particularly for environmental monitoring. Traditional national and international soil taxonomies hardly consider the topsoil in spite of its importance for soil quality. Consequently, the FAO “Topsoil Characterization for Sustainable…
Preyssler's anion, with formula [NaP5W30O110]14-, catalyzes the oxidation of aromatic aldehydes to related carboxylic acids by hydrogen peroxide as oxidizing agent, under microwave irradiation, or at 70 ºC. Both homogeneous and heterogeneous Preyssler's catalysts (as H14[NaP5W30O110 ]) were used and had their activity…
BACKGROUND: Fluorescent biosensors based on galactose/glucose binding protein (GGBP) and environmentally sensitive derivatives of the phenoxazine dye Nile Red are described. These biosensors are proposed as the sensing platform for a minimally invasive, continuous glucose monitoring system that can be implanted under…
Monodisperse, low molecular weight poly(2,5-di(2‘-ethylhexyloxy)-1,4-phenylenevinylene) (DEH-PPV) demonstrates significantly better structural order than polydisperse PPVs. Since optical and electrical properties of polymer electronics are closely related to the structure and morphology of the active layer, morphologi…
Abstract High‐performance top‐gate ZnO thin‐film transistors (TFTs) for AM‐LCDs have been developed. Sputtered ZnO was used as an active channel and silicon nitride (SiNx) deposited by plasma enhanced chemical vapor deposition (P‐CVD) was used as a gate insulator. Field effect mobility and threshold voltage of the ZnO…