Materials Literature
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Composites made from hemp and polypropylene were prepared in order to determine the effect of fibre and coupling agent content on their mechanical properties. The samples were prepared by compression molding after an initial melt blending and homogenization step in an internal batch mixer. Different fibre contents (0,…
The facile preparation of a mesoporous magnetic carrier technology is demonstrated. The micron-sized spherical mesostructured particles are prepared using a newly-developed, one-step, combined emulsion and solvent evaporation (ESE) method. The surfactant-templated silica matrix display a well-ordered internal pore arc…
The observation of very long lifetimes of the metastable states of two cobalt-dioxolene complexes undergoing photoinduced and high T(c) thermally-induced valence tautomer interconversion opens new research perspectives.
The possibility of combustion synthesis of perovskite-oxide thermoelectric materials with the attendant saving of energy and time and without deterioration in the thermoelectric properties was investigated by evaluating the thermoelectric properties of lanthanum-doped strontium titanate (Sr1−xLaxTiO3, 0≤x≤0.1). The ma…
Mechanism of corrosion protection obtained by anodization for die-cast plates of ASTM AZ91D (Mg-9 mass%Al-0.7Zn) magnesium alloy has been studied. Anodization was conducted by conventional Dow17 which utilizes chromium oxide (VI), ammonium fluoride and phosphoric acid, and by environment-friendly Anomag whose electrol…
Surface-wave propagation at the planar interface of a columnar thin film (CTF) -- a biaxial dielectric medium -- and an isotropic dielectric substrate may occur over a narrow range of propagation directions, range being dependent on (i) the bulk matgerial that is evaporated to deposit the CTF, (ii) the vapor incidence…
Reaction of K2[Ru(bipy)(CN)4] with MnCl2 produces a novel bimetallic compound {Mn(H2O)2[Ru(bipy)(CN)4]} (bipy = 2,2'-bipydine), exhibiting a CNT-like structure bridged by cyanide groups and high thermal stability, which has been first observed in coordination polymers.
In the cement industries the use of plasticizer additives, referred to as admixtures, to increase the material workability is of growing interest. Polymeric admixtures are sulfonate or carboxylate polyelectrolytes, the last had been recently also grafted with methoxy poly(ethylene glycol) chains. Their structure and c…
In an attempt to improve the corrosion resistance of a NiTi shape memory alloy, thick oxide films were fabricated on the surface by an anodic oxidation process. High-voltage square shape pulse anodization was carried out in various electrolytes over the whole range of pH values from sulfuric acid, acetate buffer, ammo…
The formation of host-guest cyclic architectures, built up through the self-condensation process of [Mo(2)O(2)S(2)](2+) oxothiocations around linear dicarboxylate ions such as adipate (Adip(2-)), suberate (Sub(2-)) and azelaate (Azel(2-)) anions is reported. The complexes [Mo(12)Adip](2-), [Mo(12)Sub](2-) and [Mo(14)A…
A range of Fe–Mn–Si-based shape memory alloys has been investigated to examine the interplay of composition, stacking fault probability (SFP) and Neél temperature on the shape memory effect (SME). It has been found that the SFP (inversely proportional to stacking fault energy) showed little correlation to the SME for…
This work contains the results of research on the mechanism of the shuttle self-discharge determined by Fe 2 + and Fe 3 + ions in the electrolyte of a heterogeneous electrochemical supercapacitor (HES) of a PbO 2 ∣ H 2 SO 4 ∣ C system, as well as the results of the measurements of the effect of the shuttle self-discha…
The effects of pressure on two prototypes of molecule-based magnets have been investigated through dc magnetic measurements in an attempt to realize these higher transition temperatures ( T C 's). The target compounds are (1) a genuine organic radical weak-ferromagnet, p -NC-C 6 F 4 -CNSSN ( T C = 35.5 K) with through…
Methylated microporous silica with high thermal stability and tuneable hydrophobicity was obtained by acid-catalysed sol–gel hydrolysis and condensation of mixtures of tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES). The gels exhibited a trend towards smaller ultramicropores with increasing methyl cont…
Time dependence of space charge formation under high dc electric field at various temperatures between 30 and 60degC in nanocomposite of low density polyethylene (LDPE) mixed with nano-size filler of magnesium oxide (MgO) were studied using pulsed electro-acoustic (PEA) method. In LDPE without MgO, it is found that hu…
New lanthanide(III) complexes with 2-[2-hydroxy-3-methoxyphenyl]-3-[hydroxyl-3-methoxybenzylamino]-1,2-dihydroquin- azoline-4(3H)-one (Hmpbaq) have been synthesized and characterized by elemental analysis, conductance measurements, magnetic susceptibilities, spectroscopic (IR, NMR, UV, EPR), and thermal studies. Molar…
Catalytic reduction of NOx with propene over Co2+ -exchanged beta and ZSM-5 zeolites occurs with formation of zero-valent cobalt; NOx preferentially adsorbed on Co2+ plays the role of a metal reducing agent while ligation of propene is favored for Co(0) centers.
Typical microstructures of sintered for at were mixtures of larger and smaller grains. Well-grown and homogeneous grains of were observed by adding an extra amount of barium oxide from stoichiometric composition or extending the sintering time to . Such an extra amount of barium oxide is expected to decrease chemical…
Optical quality mesostructured silica thin films functionalized with three large hydrophobic organosilylated quinizarin derivatives are prepared via evaporation induced self-assembly (EISA). Incorporation of Eu3+ is performed by post-reacting the functionalized layers with several europium precursors. Unambiguous loca…
Five new heteroleptic lanthanide(III) phenolate compounds have been synthesised in high yield, four via a transamination reaction between Ln(N(SiMe(3))2)3 and two equivalents of the phenol, HOC(6)H(2)(2,4-Bu(t))-6-CH(2)N(Me)CH(2)CH(2)NMe(2) [corrected] (LH) in thf {L(2)LnN(SiMe(3))2 where Ln = La (1); Nd (2); Sm (3);…