Materials Literature
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A samaria‐doped ceria composite powder produced by spray pyrolysis (SP) was employed as the anode material for medium‐temperature solid oxide fuel cells (SOFC). cermet electrodes were prepared with the expectation that their mixed conducting nature would enhance the electrode reaction rate and improve the operation ef…
Des films composites degradables composes d'isolat de proteines de soja (SPI) et d'acides gras (FA) ont ete prepares. L'effet des acides laurique (LA), palmitique (PA), stearique (SA) et oleique, incorpores a plusieurs taux (0, 10, 20, 30 ou 40 % p:p de l'isolat de soja) sur la couleur, la resistance a la traction, l'…
Experimental studies on the irreversible growth of field-induced chains of dipolar particles suggest an asymptotic power-law behavior of several relevant quantities. We introduce a Monte Carlo model of chain growth that explicitly incorporates the anisotropic diffusion characteristic of a rodlike object. Assuming a si…
Samaria‐doped ceria (SDC) was prepared by using the solid‐state reaction method. Sintering of SDC was significantly promoted by adding a small amount of gallium. SDC that had 1% of gallium added, sintered at 1450°C, showed almost the same properties as SDC sintered at 1600°C. Measurements showed that the addition of g…
The trinuclear complexes [{Mo(O)(Tp*)Cl}(μ-1, n -C 6 H 4 O 2 ){Mo(O)(Tp*)}(μ-1, n -C 6 H 4 O 2 ){Mo(O)(Tp*)Cl}] ( 1, n = 4; 2, n = 3) have been prepared [Tp* = tris(3,5-dimethylpyrazolyl)hydroborate], in which a chain of three paramagnetic oxo-Mo(V) fragments are linked by two 1,4-[OC 6 H 4 O] 2 - (for 1 ) or 1,3-[OC…
Lee-Goldburg decoupling has been applied to enhance dipolar oscillations during the t1 period of the two-dimensional experiment used for obtaining order parameters of the liquid crystal N-(4-ethoxybenzylidene)-4-n-butylaniline (EBBA) at different temperatures. The order parameters of the aromatic core obtained by this…
It is known that the cubic (parent phase) to trigonal (R-phase) martensitic transformation is accompanied by some precursor phenomena in the parent state, such as appearance of weak diffuse scattering, although the mechanism is not clear. In the present work, the structural modulation in the parent phase was analyzed…
The 2-D bimetallic complex [NiL]3[Fe(CN)6]2·9H2O (L represents 3,10-dimethyl-1,3,5,8,10,12-hexaazacyclotetradecane) has been prepared and its structure and magnetic properties studied. The structure consists of cyano-bridged neutral Ni3Fe2 units. Each hexacyanoferrate(III) ion connects three nickel(II) ions using thre…
Superlattice reflections observed for the first time in the room temperature powder neutron diffraction patterns of SCT are shown to arise due to tilting of TiO 6 octahedra. Rietveld refinement of the neutron diffraction data confirms that the structure of SCT for is orthorhombic similar to that of CaTiO 3 . Implicati…
When successfudly applied, ceramic Cutting tools can increase the metal removal rate by several times over that obtained with conventional tool materials. Ceramic tools are either based on alumina or silicon nitride and applications in metal cutting are determined by the specific material properties of the tool materi…
Alumina specimens were prepared by compacting well‐characterized spray‐dried alumina granules of excellent deformability, followed by sintering. The strength and Weibull modulus were measured and microstructure was evaluated for specimens prepared from granules with different density and morphology. Compacts of sphero…
Two coarse-grained models for polymer chains in dense glass-forming polymer melts are studied by computer simulation: the bond fluctuation model on a simple cubic lattice is treated by Monte Carlo methods, and a continuum bead-spring model with a Lennard-Jones potential between the beads is treated by means of molecul…
Phosphorus-based flame retardants have diverse modes of action, Aryl phosphates can have vapor phase action in styrenic polymers but also can contribute to producing a barrier layer. Tris(dichloroisopropyl) phosphate in a flexible polyurethane foam can serve as both a vapor-phase (probably physical) flame inhibitor in…
Vascularization into a poly(vinyl alcohol) (PVA) sponge was investigated using basic fibroblast growth factor (bFGF). This growth factor was impregnated into biodegradable gelatin microspheres for its sustained release and then the bFGF-containing microspheres or free bFGF were incorporated into PVA sponges. Following…
The novel tetranuclear copper(II) complex [Cu4(hpda)4][ClO4]4·H2O (Hhpda = N-(2-hydroxyethyl)-1,3-propanediamine) with an open cubane-like Cu4O4 framework has been obtained and characterized by X-ray crystallography and magnetic measurements, exhibiting strongly ferromagnetic exchange interaction.
Push-pull thiazole-containing nonlinear optical chromophores with dicyanovinyl and tricyanovinyl acceptors, along with their thiophene analogs, have been synthesized and characterized. The onset temperatures of thermal decomposition of these chromophores determined by DSC are above 240 °C. The redox properties of the…
Silicon nitride with unidirectionally oriented elongated grains was fabricated by the combination of seeding and extrusion process. Development of such highly anisotropic microstructure is due to the high shear stress exerted during the extrusion process, which allowed the unidirectional alignment of rod-like seed par…
We apply first-principles density-functional calculations to study strain in dense amorphous tetrahedral carbon $(a\ensuremath{-}\mathrm{tC}).$ While the large strain present in small-ring structures, particularly three-member rings, could argue against their existence in $a\ensuremath{-}\mathrm{tC},$ we demonstrate,…
The amorphous-to-crystalline phase change induced by a continuous-wave laser was investigated systematically in the case of as-grown amorphous films of , and and results were compared. The photo-thermal process is found to be responsible for the phase change in all three compounds. The minimum threshold laser power re…
The size–shape distribution of voids, which includes cracks and pores, was determined using quantitative stereological analysis. The analysis was performed on a water‐stabilized plasma‐spray‐formed Al 2 O 3 –13 wt% TiO 2 . The individual voids were assumed to have an oblate spheroidal shape, which could simulate shape…