Materials Literature
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Despite the extensive investigations carried out on the pollution performance of outdoor insulators, the flashover characteristic and its interaction with insulator shape is still not very well understood. In this paper, we present findings of experiments which allow quantifying the effects of insulator geometry on th…
Abstract In this paper the first example of a mixed‐ligand Mn II complex, having a trigonal‐prismatic coordination geometry with simple, innocent, didentate ligands is presented. The solution and solid‐state structures of [Mn(acac) 2 (bpy)] as studied by EPR spectroscopy, magnetic susceptibility measurements and XRD a…
The effects of annealing temperature and hydrolysis catalyst on the crystalline form and crystallite size of TiO2 prepared by a sol-gel process were investigated. Three types of TiO2 were synthesized by hydrolysis of titanium(IV)-iso-propoxide with water in n-propanol without catalyst (Type-A) and with HCl as catalyst…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTA One-Step Approach to the Highly Efficient Preparation of Core-Stabilized Polymeric Micelles with a Mixed Shell Formed by Two Incompatible PolymersTaoran Hui, Daoyong Chen, and Ming JiangView Author Information Department of Macromolecular Science and The Key Laboratory of Mol…
A liquid crystal phase of matter can be described as one where the constituent molecules are sufficiently disordered to confer the flow properties of a liquid, yet still retain some degree of order...
Precipitation of charged amino acids in the presence of oppositely charged polyelectrolytes leads to liquid droplets of the corresponding polymer/amino acid complexes in water. The resulting emulsions are stable against crystallization and Ostwald ripening for several months but can also be used as a starting situatio…
AbstractThe effect of different zirconium contents on the grain size of Mg–9Gd–4Y alloys and the grain refinement mechanism of zirconium have been studied. The results reveal that zirconium can refine the grains of the alloys to a large extent, and the grains become finer with an increase of zirconium content. Microst…
An ordered molecular assembly of heteroleptic bis(phthalocyaninato) rare earth complexes M(Pc)[Pc(OC8H17)8] [M = Tb, Lu; H2Pc = phthalocyanine; H2Pc(OC8H17)8 = 2,3,9,10,16,17,23,24-octakis(octyloxy)phthalocyanine] has been fabricated by the Langmuir-Blodgett (LB) technique and characterized by surface pressure-area is…
The mechanisms occurring in plastic flow at elevated temperatures may be divided into three distinct classes depending upon whether they are intragranular dislocation mechanisms, grain boundary sliding including superplasticity or diffusion creep occurring through vacancy flow. The characteristics of these various mec…
Abstract Electrochemical anodic oxidation of aluminium metal sheets leads to the formation of compact and dense, but highly porous alumina surfaces on top of the anode. The alumina surfaces obtained by anodic oxidation can be detached from the bare metal by using a voltage detachment procedure, without employing chemi…
Abstract The interaction of biological molecules with a typical substrate for surface‐enhanced Raman scattering (SERS) often leads to their structural and functional changes. In this paper we describe SERS substrates, called adaptive silver films (ASFs), in which the biomaterial and the substrate act in concert to pro…
The barrier effect in high voltage engineering is usually understood to mean an increase in the breakdown voltage of the insulation gap due to the use of additional insulation layer (a barrier) which is placed between two layers of the main dielectric. This effect has been known for more than 70 years and it is widely…
A new perovskite-type oxide, CaCu 3 Cr 2 Sb 2 O 12, has been synthesized at 10 GPa and 1100 °C. This compound crystallizes in space group Pn 3̄ and shows simultaneous cation ordering on both A and B sites. Magnetization measurements indicate that an interaction between A-site Cu(II) and B-site Cr(III) cations dominate…
Triethoxysilyl-functionalized poly(propylene imine) (DAB32) dendrimer and poly(ethylene imine) (PEI5) hyperbranched polymer were conveniently prepared in chloroform and were subsequently allowed to impregnate porous ceramic filters. Following hydrolysis of triethoxysilyl moieties to Si−OH, polycondensation occurred af…
Frequency and temperature dependence of dielectric constant \\varepsilon' and dielectric loss \\varepsilon" in pure polyester resin and polymer composites with various types of glass fiber are studied in the frequency range 330 Hz-3 MHz and in the temperature range 25-150 °C. The experimental…
Despite a long history of continuously improved magnetic properties, the further development of grain-oriented electrical steel is still an exciting field for industrial and joint fundamental research. Today, the driving forces for research and development (R&D) are on one hand increasing quality demands, i.e. still l…
We report in situ environmental transmission electron microscope observations of the nucleation and growth of multi-wall and single-wall carbon nanotubes formed by the catalytic decomposition of acetylene (C2H2) on Ni/SiO2 catalyst. The growth rate, structure and morphology of the carbon nanotubes formed depended upon…
Abstract This paper reviews the results of recent molecular dynamics (MD) modelling studies of the interaction of water and solute species with mineral surfaces and their behaviour in mineral interlayers. Emphasis is on results for single and double hydroxide phases. Computational results are presented for water and a…
A simple and general method for fabricating structurally well-defined Au nanotube membranes has been developed. A 2-D perfect array of metal nanodots has been realized by using the membrane as a shadow mask. The SEM image illustrates the three-dimensional structure of the Au nanotube membrane.
Abstract The strain-rate sensitivity of commercial purity Aluminium (Al 99.5) and of α-iron, with both conventional (CG) and ultrafine (UFG) grain sizes, are investigated by compression and tension tests at different temperatures. Microstructural investigations were performed before and after compression testing in or…