Materials Literature
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The paper proposes a design concept of multifunctional layered composite materials, i.e., sandwich panels, intended for use in equipment and facilities operating in Arctic conditions. A general layout of the composite structural elements is proposed, a selection of the components is discussed, and fire-resistant and s…
The elastic properties of a biocompatible silk film were investigated under temperature and pressure variations by using Brillouin spectroscopy. The Brillouin frequency shift decreased monotonically upon heating and showed a sudden change at the glass transition temperature. The existence of water molecules in the fil…
Barium hexaferrite (BaFe12O19) magnetic nano-powder was prepared by co-precipitation method. The effectiveness of different chemical synthesis variables such as solvent and mechanical milling on the adsorption efficiency of barium hexaferrite nano-particles to remove Cr (VI) ions from aqueous solutions was examined. S…
The behavior of the Raman spectra of SrB 4 O 7 (SBO) and Li 2 B 4 O 7 crystals upon melting and glass formation is studied by high-temperature Raman spectroscopy (HTRS). The character of formation of boron–oxygen fragments in different aggregate states of SBO is discussed based on an analysis of the Raman spectra in t…
Novel blend of diglycidyl ether of bisphenol-A (DGEBA) and tetrabromo bisphenol-A (TBA) was reinforced with acid-functionalized (MWCNT-F) and amine-functionalized multi-walled carbon nanotube (MWCNT-A). DGEBA/MWCNT-A displayed fine tubular morphology with open nanotube ends, while DGEBA/TBA/MWCNT-A displayed somewhat…
Lithium-containing ceramic pebbles, the likeliest tritium breeders in the future, are needed in the fusion reactor blankets. Currently, lithium orthosilicate (Li 4 SiO 4 ) has been widely studied for tritium breeding pebble as it has 1250 °C melting temperature, 0.54 g/cm 3 lithium concentration, and excellent tritium…
A facile and green route to prepare reduced graphene oxide (RGO) is reported. The graphite oxide is firstly pretreated by detonating exfoliation in muffle furnace at low temperature and then is completely reduced to RGO in hydrogen atmosphere at high temperature, namely two‐step method. Extensive characterisations sho…
One topic related to the increment in the sustainability is the incorporation of photosynthetic organisms on the structures envelope. In this sense, the development of cementitious materials with enhanced bioreceptivity to stimulate natural colonization may provide a new solution. Accordingly, modifications on the bio…
Adv. Mater. 2016, 28, 4105 In the originally published article, the calculated specific surface area of the NNA nanostructure was incorrect as the surface roughness was not considered in the calculation. The sentence “The BET measured specific surface area of the NNA nanostructure was 2.10 m2 g−1, which well matched t…
MoO 3 is one of the challenging oxides in nuclear waste vitrification in the UK. It has a poor solubility in the conventionally used nuclear waste glasses and its excess presence may cause the formation of "yellow phase" which is highly detrimental to vitrification process. This work investigates the compositional dep…
Ming-Siao Hsiao, Yang Jiao, Richard A Vaia, Lawrence F Drummy; Microscopic Characterization of Fracture Mechanisms in Polystyrene Grafted Nanoparticle Asse
In drilling and production process, the barite powder serving as weighting agent is added to ensure operation safety when overflow occurs, that results in reservoir pollution and pore blockage. The main component of barite is BaSO 4 , so ammonium carboxy chelating agents can be injected into formation to form stable c…
( 7 Li, 1 H) NMR and impedance spectroscopy methods are used to study the ion mobility and conductivity in a complex of the composition Li(NH 3 CH 2 COO)(NO 3 ) ( I ), which has a layered crystal structure. The character of ion motions in lithium and proton sublattices with temperature variation is considered; the typ…
The diatom assemblages of the surface sediments have been studied in 53 urban ponds and lakes of St. Petersburg for the first time. In total, 350 species and infraspecific taxa have been registered; the species of Achnanthidium , Cocconeis , Cyclostephanos , Cyclotella , Gomphonema , Lemnicola , Navicula , Nitzschia ,…
This paper reports a new method of increasing surface flashover voltage on GIS epoxy spacer with incorporating nano/micro composites in SF6gas. Simulation on the electric field grading effect on the surface flashover voltage for a GIS insulator model is carried out with nano/micro composites. To confirm the field grad…
Withstand lightning impulse voltage test is generally carried out for guaranteeing equipment's insulation performance. On the other hand, it is concerned that other insulation performances are influenced by applying impulse voltage. For example, an AC PD (partial discharge) test changes after a number of impulse volta…
As the use VLF diagnostic testing is a promising trend, it is important to investigate PD characteristics during aging at very low frequency range. Test samples of solid insulation with voids inside fabricated by a 3D printer are subjected to VLF excitation for PD measurements. PD characteristics at different aging st…
Zinc-iron alloy plating (ZnFe) was successfully deposited on AISI 4140 steel applying cyclic voltammetry technique. Polyaniline (PANI) film was synthesized with cyclic voltammetry technique from 0.10 M aniline containing 0.30 M oxalic acid solution on zinc-iron plated carbon steel (AISI4140/ZnFe) electrode. ZnFe film…
Electrical insulation materials with high thermal conductivity can protect equipment from heat fault and extend the working life of polymeric components. A nanodiamond/epoxy polymer network was developed based on surface modification of the nanodiamond. A simple oxidation strategy was used to modify the surface functi…
Charge trap is considered to be one of the effective characteristic parameters for qualitatively evaluating the aging status of insulating material. In this paper, the trap characteristics in oil-impregnated paper with different aging types (non-treatment, thermal treatment and electrical treatment) are investigated u…