Materials Literature
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The crystal structure of γ- Mo 4 O 11 was obtained at room temperature (296 K) by Rietveld analysis with X-ray powder diffraction data. The crystal belongs to orthorhombic system, space group: Pna 2 1 , Z =4, Mr=559.753 (Atomic weights 1977), D x =4.1228 g / cm 3 , F (000)=1024.0, μ=451.293 cm −1 (Int. Tab. Vol. C, Ta…
Abstract Choosing an environmental control technology for destroying oxides of nitrogen (NO x ) became essential when Engelhard, a manufacturer of automotive catalysts, included inorganic nitrate compounds in their formulations. Heat treating catalysts inside a high temperature oven causes these compounds to decompose…
In this paper we studied the piezoelectric and dielectric properties of collagen films, considering the development of new biomaterials which have potential applications in coating of cardiovascular prostheses, support of cellular growth and in systems for controlled drug delivery. The resonance technique was used to…
Numerous studies of grafted skin suggest that full-thickness skin grafts are nourished by exudate from the recipient bed called a serum imbibition. However, whether serum imbibition by itself is sufficient for nourishment of skin grafts has not been shown definitely and directly. To clarify the role of serum imbibitio…
The effect of Al 2 O 3 substitution on the thermal expansion behavior of a Li 2 O‐ZnO‐SiO 2 glass‐ceramic was investigated using differential thermal analysis, X‐ray diffractometry, and dilatometry. The coefficient of thermal expansion of the original Al 2 O 3 ‐free glass‐ceramic measured between 20° and 900°C decreas…
Abstract The structural properties of end members of the aluminosilicate garnet family (pyrope, grossular, almandine and spessartine) have been investigated as a function of applied pressure. The study has been performed with the density functional theory code CASTEP which uses pseudopotentials and plane-wave basis se…
Ceramics of several PbB1/2 3+ B1/2 5+O3 perovskites (B3+-In, Sc, Yb, Lu, Er, Tm; B5+-Nb, Ta) with differing degree of compositional ordering were obtained using Li2CO3 additions. Ordering process in Li-doped ceramics is greatly enhanced due to recrystallization of grains in the presence of liquid phase. The properties…
Abstract Tubular La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3–δ perovskite‐type membranes were prepared by isostatic pressing. A mathematical model was developed to simulate the performance of the tubular perovskite‐type dense membranes for oxygen permeation. The experimental oxygen permeation fluxes of tubular La 0.6 Sr 0.4 Co 0.…
A fast growing volume of literature in various fields of composite materials and structures has inspired the authors to attempt to assemble all major books and review papers in a concise compendium presented here. This could give researchers, engineers, designers, and graduate students a rapid access to the vast volum…
Coatings of fluorescent coloring agent (FCA) on the glass of a solar cell module were proposed to increase the energy conversion efficiency of the cells by preventing the layer of glass and filler from absorbing light at wavelengths below 400 nm. The FCA coating showed no reduction in reflectivity at wavelengths longe…
Tubular dense perovskite type membranes were prepared by isostatic pressing and plastic extrusion. The resulting tubular La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 - δ perovskite type membrane prepared by plastic extrusion (designated as PE-LSCF) has a lower density and oxygen permeation flux compared with that prepared by isost…
Crystals of the title compound were obtained by annealing a powder of Tl2Te3 in a vertical temperature gradient (230 °C–240 °C, 4 weeks). Tl2Te3 crystallizes in space group C2/c with lattice parameters of a = 13.275(1) Å, b = 6.562(1) Å, c = 7.918(1) Å, and β = 107.14°(2). The tellurium atoms form chains [Te32–], cons…
Dielectric properties of oxygen deficient BaBiO3−δ have been analyzed, and dielectric loss anomalies at 175 and 225 K were found, which were dependent on oxygen deficiency. The activation energies corresponding to the relaxation processes of dielectric anomalies at 175 and 225 K were 0.26 and 0.50 eV, respectively. Th…
Abstract The cetineite structure-type has the very general formula A 6 [ B 12 O 18 ][ CX 3 ] 2 [ D x Y 6− y ] with 0 ≤ x ≤ 2 and 0 ≤ y ≤ 6. In a preceding paper [Eur. J. Solid State Inorg. Chem. 35 (1998) 27–37] natural and synthetic cetineite-type phases with A = Na + , K + , Rb + , Sr 2+ , Ba 2+ ; B = C = Sb; X = S…
Abstract Modifications of structure and morphology of the polymers induced by the thermomechanical stress (or by the presence of water for some polymers) during reprocessing can cause a drastic deterioration of mechanical properties of the recycled material. The property ‐ reprocessing relationships are an important t…
The results of application of gradient theory of elasticity to a description of elastic fields and dislocation and disclination energies are considered. The main achievement made in this approach is the removal of the classical singularities at defect lines and the possibility of describing short-range interactions be…
Abstract The effects of filler size on the properties of a thermoplastic polyolefin (TPO) blend were examined by using wollastonite and talc with particle sizes ranging from 1.2 to 40 μm. While addition of filler produced significant changes in the mechanical properties of the blend, filler size affected only impact s…
Thin layers of epitaxial CdSe nanocrystals with rocksalt structure have been electrodeposited onto gold alloy films. The rocksalt phase does not normally exist for CdSe at ambient pressure, and its (meta)-stability is attributed to the strong interaction between CdSe and Cd–Au (since the phase is virtually absent for…
The narrow band-gap semiconductor ${\mathrm{Pb}}_{1\ensuremath{-}x}{\mathrm{Ge}}_{x}\mathrm{Te}$ has a low-temperature ferroelectric rhombohedral phase whose average structure is a distorted rocksalt structure. We have measured the extended x-ray-absorption-fine-structure (EXAFS) spectra of ${\mathrm{Pb}}_{1\ensuremat…
The structure of a CaO–SiO 2 –ZrO 2 -based glass ceramic has been investigated by X-ray diffraction, X-ray absorption spectroscopy and differential anomalous scattering techniques as a function of the thermal treatment of the sample. The microstructure of the glass has been investigated at room temperature, before the…