Materials Literature
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Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
Table of contents, editorial information and publication information for volume 42, no. 2 (spring 2015) of Educational Considerations.
The background properties can add background effects. None of these properties inherits and they can be applied to any elements. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Branched poly(phosphoric ester) (BPPE) oligomer containing intumescent flame retardant were synthesized from spirocyclic pentaerythritol diphosphonate dichloride (SPDPC) and triethanolamine (TEA) and it was blended with poly(L-lactide) (PLLA) to investigate its influences on the thermal and rheological properties of p…
New potassium solid electrolytes in the mixed gallate-ferrite systems K0:85Pb0:75(Ga1−xFex)O2 and K1:85(Ga1−xFex)1:925V0:75O4 were synthesized and studied. In the both systems the monotonic increasing of conductivity with increasing of Fe3+ concentration takes place, anomalies as in the early investigated aluminate-fe…
The paper generalizes a many years’ experience in manufacturing and testing of multicell PHOTON stacks based on hydrogenoxygen alkaline matrix fuel cells. Inter-cell processes effecting the stack lifetime are concerned, the main of which is the current flow between cells along a thin electrolyte film in gas collectors…
The composites contained ultra low amounts of platinum, polymers and carbon nanotubes (SWCNTs) were investigated. The main goal were to elucidate the influence of the polymer functional groups nature on the structure and on electrocatalytic activity of the composites. The structure of the composite Platinum/sodium pol…
Since the ordered mesoporous silica M41S series first successfully synthesized by the scientists of Mobil 1-3 , the ever increasing number of researchers have devoted themselves to developing advanced meso-textured inorganic or organicinorganic hybrid materials using various types of organic template. Because of well-…
The oxygen reduction mechanisms on an oxide electrode are proposed. It was found, that in the temperature range 870–1020 K mechanism involving superoxide ions dominates, whereas in T < 870 К region the reaction mechanisms involving molecular oxygen apparently take place.
The influence of porous structure of the absorptive glass mats manufactured by «Hollingsworth&Vose» (thickness 2.8 mm) and BernardDumas» (thickness 3.0 mm), modified by impregnation with polymeric emulsions on the basis of polyvinylidene fluoride (KYNAR), polyvinylpyrrolidone copolymer with styrene (PVS) and polytetra…
New mechanisms of oxygen reduction on perovskite related oxides LaLi0:1M0:1Fe0:8O3−d (M = Fe, Co, Ni) and a rock salt type oxide Li0:1Ni0:9O have been proposed. Based on these mechanisms, a comparison of catalytic activity of the oxides in the temperature range 820–1000 K has been done. It has been shown that catalyti…
This article proposes a comparative analysis of Marcel Proust and W. G. Sebald and explores the representation of knowledge and memory in their respective works. It shows how with both authors, mental processes are often dramatically represented, notably in terms of the fallibility to which such processes give rise. I…
The results of the study of kinetics of oxygen reduction on the dense LaLi0:1Co0:1Fe0:8O3−d electrode in (Li0:62K0:38)2CO3 eutectic melt using coulostatic technique are reported. It was found, that the equivalent circuit that includes heterogeneous charge transfer step in series with heterogeneous chemical reaction mo…
Hydrogen has a strong binding to vacancies, which could lead to large vacancy concentrations. We study, by atomistic simulations, their possible impact on mechanical properties of grain boundaries. Intergranular vacancy clusters are generated by a Monte Carlo (MC) procedure. The MC simulation box is replicated to cons…
Intergranular-type TiC-Ni cermets acquired by spark plasma sintering were reported. Composition and microstructure were studied by X-ray diffraction, field-emission scanning electron microscopy and transmission electron microscopy. Results revealed that TiC@Ni nanopowders less than 100 nm could be effectively used as…
National audience
This paper presents polarization characteristics of porous gas diffusion cathodes prepared from LaLi0:1M0:1Fe0:8O3−d (M = Fe, Co, Ni) oxides with a perovskite related structure and Li0:1Ni0:9O oxide with a rock salt structure. The characteristics were measured in the laboratory scale fuel cell in the temperature range…
Considering graphene field effect transistors (GFETs), considerable efforts have been made during the recent years to reach impressive current gain cut-off frequency (ft) over 400 GHz. Unfortunately, for these devices, the maximum frequency of oscillation (fmax) remains under 100GHz. This deviation of the ratio fmax/f…
International audience
International audience