Materials Literature
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We have used first-principles linear response calculations and molecular dynamics to study the relaxor ferroelectric Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMN-x PT). First-principles calculations for ordered PMN show a low-symmetry monoclinic ground state. A new set of phase transitions to lower symmetry rhombohedral and m…
Silicon carbonitride (SiCN) films were deposited by radio-frequency magnetron sputtering and then annealed at different temperatures from 1100to1300°C in hydrogen atmosphere. The as-deposited films and films annealed at 1100°C did not show photoluminescence (PL), whereas strong PL peaks appeared at 355 and 469nm after…
Abstract A new kind of supramolecular building unit was synthesized from 1,2,4,5-benzenetetracarboxylic acid and 4-hydroxypyridine by a simple procedure. The structure of the building unit was characterized by 1H NMR spectroscopy, IR spectroscopy, EA, and XRD. Under suitable conditions, supramolecular hydrogels and fi…
ZnO nanostructures including nanorod and nanotower were synthesized on Ag nanoisland coated Si substrate by thermal evaporation and vapor phase transport at atmospheric pressure. The as-prepared ZnO nanorods and nanotowers were single crystal growing along [0001] direction. The growth of ZnO nanostructures strongly de…
Three phase transformers used in the electric power applications are composed either of three single phase transformers or they are three limb core type. The majority of three phase core-type transformer dynamic models neglect magnetic nonlinearity and saturation. This paper presents two magnetically nonlinear iron co…
The interactions between Er3+ ions OH groups in Er-doped Bi2O3-based glasses were investigated for samples with various Er OH concentrations. From the analyses of the total decay rate of the I13∕24 level of Er3+ it was confirmed that the OH groups are dominant quenching centers of excited Er3+ and a cause of concentra…
The diatom subclass Eunotiophycidae has recently expanded in composition. While it still includes a single order, the Eunotiales, and two families, the Eunotiaceae and Peroniaceae, the former includes four genera, Eunotia, Actinella, Semiorbis and Desmogonium, while the Peroniaceae includes only one, the genus Peronia…
The simple salt approximation for the lattice energy of double salts is used to provide an estimate of their molar solubilities. These calculations are compared with solubilities obtained from literature thermodynamic data and are within an order of magnitude for about 75% of the 81 minerals and other double salts exa…
Magnetization, static and ac magnetic susceptibility, nuclear forward scattering, and electrical resistivity measurements have been performed on polycrystalline ${\mathrm{Eu}}_{4}{\mathrm{Sr}}_{4}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30}$, a type I clathrate that has divalent strontium and europium ions encapsulated within…
Abstract Single crystals of Ti 2 Rh 6 B were synthesized by arc-melting the elements in a water-cooled copper crucible under an argon atmosphere. The new silver-like compound with metallic luster crystallizes in space group Fm -3 m (no. 225) with a = 7.8191(5) Å, V = 478.05(5) Å 3 , and Z = 4. The refinement converged…
The tunable property and thermal stability of (Ba0.25Pb0.25)Sr0.5TiO3 films derived by pulsed laser deposition have been investigated. The substitution of Pb for Ba in (Ba,Sr)TiO3 (BST) system has been revealed to raise the transition temperature close to room temperature (RT) and enhance the tuning property. It is pr…
On the basis of literature data, montmorillonite (MMT) as a filler of polymeric composites was characterized, namely the structure and the possibility of its modification. The authors' investigations concerned the process of preparation of nanocomposites based on isotactic polypropylene (PP) with MMT, with use of thre…
Iodine is a fission product of major importance in a severe reactor accident because volatile species exist under reactor containment conditions. Radiolytic oxidation of iodide ions is an important source of volatile iodine species. The SISYPHE tests provide an experimental database of prime importance for the study o…
PbO-P2O5-As2O3 glasses containing different concentrations of Al2O3 ranging from 0 to 5 mol% were prepared. Dielectric properties (viz., dielectric constant , loss tan and a.c. conductivity over a moderately wide range of frequency and temperature and dielectric breakdown strength in air medium), optical properties (o…
Elastic properties of different compositions of lithium borate glasses x Li 2 O·(1- x )B 2 O 3 ( x =0.06–0.28) were investigated in the temperature range from 25 to 600 °C by Brillouin scattering spectroscopy. The composition dependence of the lithium borate glass system shows a stiffening tendency and a higher onset…
A method to extract low-order dynamic models of nonlinear magnetic devices from a high-order physics-based model is presented. The model includes saturation, skin effect, and eddy current. The physics-based model is derived from finite-element analysis, using only geometry and materials data. A nonlinear model order r…
We constructed and characterized supramolecular nanostructures consisting of ruthenium-complex luminophores, which were directly grafted onto short oxidized single-walled carbon nanotubes or physically entrapped in silica nanobeads, which had been covalently linked to short oxidized single-walled carbon nanotubes or h…
Due to an increasing demand for new, or the refurbishment of power stations, high-voltage rotating machines continue to play a significant role in generating electrical energy. An important component of these machines is their electrical insulation. Although much research has been done to improve the material, about a…
ABSTRACT: Effects of plasticizer concentrations (0, 0.5, 1.0, 1.5, and 2.0% glycerol) and solvent types (1% acetic and 1% lactic acid) on internal quality of eggs coated with 2% chitosan solution were evaluated during 5 wk of storage at 25 °C. In comparison of plasticizer concentrations, eggs coated with chitosan diss…
The effect of long-range (LR) elastic interactions on the toroidal moment of polarization in a two-dimensional ferroelectric particle is investigated using a phase field model. The phase field simulations exhibit vortex patterns with purely toroidal moments of polarization and negligible macroscopic polarization when…