Materials Literature
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Neutron elastic scattering was used to determine the structure of as-received and lithiated amorphous SiO which has been proposed as an anode material for lithium ion secondary batteries. Based on a comparison between the total radial distribution functions of SiO and it was suggested that amorphous SiO is composed of…
The possibility to understand natural strategies to build‒up silica SiO 2 networks relies on the investigations of the kinetics of silica precursors polymerization in the presence of biopolymers. The silicomolybdic acid spectrophotometric method allows to study this process at the molecular level, provided that reliab…
Biomorphic SiC (bioSiC) ceramics are a new class of materials produced with natural, renewable resources (wood or wood‐based products). A wide variety of Si/SiC composites can be fabricated by melt Si‐infiltration of wood and cellulose‐derived carbonaceous templates. This technology provides a low‐cost and eco‐friendl…
We have analyzed the physical origins of the temperature gradient of the ordinary refractive index ( dn(o) /dT) of liquid crystals. To achieve a large dn(o) /dT , high birefringence and low clearing temperature play crucial roles. Based on these simple guidelines, we formulated two exemplary liquid crystal mixtures, d…
The modulated crystal structure of an antigorite polysome with m = 17 was refined by single crystal X-ray diffraction in the Pm space group, using highly ordered single crystals from Val Malenco, Italy. The chemical composition is (Mg 2.673 Fe 2+ 0.098 Fe 3+ 0.015 Al 0.035 Cr 0.007 Ni 0.003 Mn 0.002 ) Σ=0 . 823 (Si 1.…
The genus Pseudo-nitzschia includes a number of species responsible for blooms in coastal and open waters worldwide. P. delicatissima, a species reported as a potential source of amnesic shellfish poisoning (ASP), reaches high concentrations in the Gulf of Naples (Mediterranean Sea), where it regularly blooms in sprin…
The crystal structures of o-toluidinium chloride (1), o-toluidinium bromide (2) and two polymorphs of bicifadine hydrochloride (3) have been determined. The polymorphs of 3 differ in their molecular conformation and in their mode of packing. Crystallisation studies and quantum mechanical calculations show that the mor…
1,3:2,4-Di-O-benzylidene-D-sorbitol (DBS) and its derivatives are efficient gelators to solidify organic solvents over a wide range of polarity. In this paper we demonstrate the usefulness of certain DBS derivatives as efficient gelators to form thermoreversible gels in electrolyte solutions which are of particular in…
A series of solid oxide fuel cells (SOFCs) with anodes containing mixtures of either Cu and Ni or Cu and Co, prepared by impregnation of the metal salts into porous yttria-stabilized zirconia (YSZ), were examined for operation with both and n -butane fuels at 973 and 1073 K. The Cu-Ni mixtures formed single-phase allo…
In this paper, two types of sustainable cementitious composites, geopolymer and magnesium phosphate cement, are introduced. The geopolymer is a type of amorphous alumino-silicate products and magnesium cement is MgO based cementitious material. Geopolymer can be synthesized by polycondensation reaction of geopolymeric…
Shape memory properties of Ti-Mo-Ag and Ti-Mo-Sn alloys consisting of biocompatible elements were investigated. The alloys with appropriate combination of Mo and Ag or Sn showed nearly perfect shape memory effect in convenient bending and heating tests. Recoverable tensile strain is more than 3% in some of Ti-Mo-Ag an…
Molecular symmetry has a pronounced effect on the melting properties and solubility of organic compounds. As a general rule, symmetrical molecules in crystalline form have higher melting temperatures and exhibit lower solubilities compared with molecules of similar structure but with lower symmetry. Symmetry in a mole…
In this paper, stainless steel is selected as the conductive filler to produce stainless steel hybrid yams to make woven fabrics. Using coaxial transmission equipment, the electro magnetic shielding effectiveness (EMSE) of these fabrics is measured. The experimental results show that a denser structure has a higher EM…
Single-walled carbon nanotube/polyaniline (SWNT/PANI) composite films were prepared by in situ electrochemical polymerization of an aniline solution containing different SWNT contents. Surface morphology and structural properties of these PANI-based films were examined by a scanning electron microscope and X-ray photo…
A plain IF steel and a P-added IF steel having various ultrafine grain sizes from 0.24 to 11 μm were fabricated by the accumulative roll bonding (ARB) process followed by annealing. Dynamic fracture toughness of the ultrafine grained IF steels was investigated as a function of grain size by miniaturized Charpy impact…
A novel mechanism is proposed for the Fast SCR reaction of NH(3), NO and NO(2) at low temperature involving the formation of ammonium nitrate as intermediate and its subsequent reaction with NO as the rate determining step.
Research into materials displaying oxide ion conductivity is attracting considerable attention due to their potential technological applications in devices such as Solid Oxide Fuel Cells. In this paper, recent work on apatite-type oxide ion conductors is reviewed, showing that a wide range of cation substitutions are…
This paper presents some results concerning the characterisation of the structural parameters of bacterial cellulose/chitosan composite materials with regard to their medical application. Some chemical-physical, mechanical and biological properties of modified bacterial cellulose are presented. The innovatively-modifi…
We report here a simple strategy for the synthesis of wire/ribbon-like polypyrrole nanostructures using lamellar inorganic/organic mesostructures as templates which were formed during polymerization between surfactant cations and oxidising anions and which were degraded automatically after polymerization.
Composites of yttria-stabilized zirconia (YSZ) with Sr-doped (LSF) were studied for application as high-performance cathodes for solid oxide fuel cells (SOFCs). The composites were formed by aqueous impregnation of porous YSZ with La, Sr, and Fe salts, followed by calcination at various temperatures. X-ray diffraction…