Materials Literature
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For many years the scientists of the world have worked on solving a problem: How can we meet human needs for electric power and heat? The use of aluminum in this field is considered. The authors are sure that the use of this metal in new power units will solve many problems of traditional and hydrogen energy.
The latest development in the x-ray diffractometers makes modulated structures more frequent and accessible than ever before. The last version of Jana software, Jana2006, contains improvements facilitating solution of modulated structures for non-specialists. The initial structure model, including modulations, is now…
Ni-based hydrotalcite catalysts were investigated for ATR of propane in a fixed-bed flow reactor. The reactions were carried out with a H2O/C/O2 stream ratio of 3/1/0.73 at temperatures ranging from 300 to 700 degrees C. The solvents used in the manufacture of Ni-based catalysts noble metal/Ni/MgAl catalysts or substi…
A zeolite plate with push contacts is placed in a chamber filled with air at a controllable pressure, and the current-voltage characteristics of the zeolite plate are measured as a function of the air pressure in the chamber. It is found that the gas in zeolite pores ionizes and, accordingly, the number of electrons i…
Zinc Oxide (ZnO) thin films were deposited on a glass substrate by sol-gel process dip-coating method. Zinc acetate dehydrate Zn(O2CCH3)2(H2O)2are used as a starting material while 2-methoxyethanol (C3H8O2) and monoethanolamine (MEA) are used as a solvent and stabilizer. The molar ratio of zinc acetate dihydrate to ME…
A study on the structure, electrical and optical properties of ZnO thin films produced by r.f. magnetron sputtering and implanted either with phosphorous (P) or antimony (Sb) is reported in this work. Raman spectroscopy, X-ray diffraction, optical transmittance and Hall effect measurements have been employed to charac…
Structure refinement of the basic Ni-rich Al-Ni-Co decagonal phase was performed in physical space. Statistical approach was used to derive the structure factor. Rhombic Penrose tiling with an edge length of 10.28 Å was chosen as a reference lattice. The best-fit structure model with 106 parameters and 2767 reflection…
Taking wollastonite as raw material, aluminium sulfate and water glass as coating modifier, a new type of wollastonite coated with nano-aluminium silicate powder-materials was obtained by chemical depositing method. By modificating this powder-materials with silane and filling it in PA6, the PA6 composite materials we…
The high-pressure induced structural phase transitions and pressure induced elastic and anharmonic behavior of boron compounds viz. BN, BP, and BAs have been investigated using an inter-ionic potential approach based on charge transfer effect. These compounds go to NaCl phase (B1) under pressure from zinc blende phase…
The transition from a stable orthorhombic structure to a hexagonal structure has been revealed in Tb1−x Y x MnO3 multiferroics at x = 0.2–0.4. It has been shown that almost single-phase crystals with an orthorhombic or hexagonal structure can be obtained by choosing the growth conditions. It has been found that the ma…
The defect structures and the electron paramagnetic resonance parameters for the substitutional Mo5+ centers in rutile type SnO2, TiO2 and GeO2 crystals are theoretically investigated from the perturbation formulas of these parameters for a 4d1 ion in rhombically compressed octahedra. The [MoO6]7− clusters suffer the…
The thermal expansion properties of sintered samples of PbTe doped with 0.5 mass % PbI2 and those of Pb0.5Sn0.5Te were evaluated by two different methods such as: (1) by determining the apparent expansion coefficient obtained from dimensional changes and (2) by estimating the crystal lattice expansion coefficient calc…
The morphological control of crystalline cerium oxide particles was realized by homogeneous precipitation process followed by calcination in air at 400°C. The effects of room temperature pre-aging time on the morphologies of final products were investigated. Monodispersed rod-like cerium carbonate precursor was produc…
This book provides a timely overview of a current state of knowledge of the use of polymer thin film for important technological applications. Polymer thin film book covers the scientific principles and technologies that are necessary to implement the use of polymer electronic device. A wide-ranging and definitive cov…
Nanocomposites based on a copolymer of 1-butene and ethylene filled with montmorillonite (Cloisite 15A) were studied, obtaining for the first time crystallization from the melt directly into phase I. The polymorphism of the polymer and the dispersion of the filler in the matrix were investigated. The effect of the com…
Novel porous Si exhibiting dual optical properties, both Fabry-Perot fringe (optical reflectivity) and photoluminescence, were developed and used as chemical sensors. Porous Si samples were prepared by an electrochemical etch of p-type silicon under the illumination with a 300 W tungsten filament bulb for the duration…
Abstract Anodic oxides were grown on the surface of an electropolished (Ti–30 at% Nb) beta‐titanium (β‐Ti) alloy by cyclic voltammetry. The scan rate was 100 mV s −1 between 0 and 8 V in increments of l V in an acetate buffer of pH 6.0. Electrochemical impedance spectroscopy was carried out right after each anodic oxi…
Ultrasoft X-ray emission spectroscopy and infrared spectroscopy are used to study the Si/SiO2 composite structure produced by deposition from the Si and SiO2 sources onto the Si substrate. Separation of the sources by a rather long distance (96 mm) made it possible to vary the composition of the layer along the direct…
Zirconium diboride (ZrB2) and mixed diboride of (Zr0.7Ta0.3)B2 containing 30 vol.% silicon carbide (SiC) composites were prepared by hot-pressing at $1800^{\circ}C$. XRD analysis identified the high crystalline metal diboride-SiC composites at $1800^{\circ}C$. The TaB2 addition to ZrB2-SiC showed a slight peak shift t…
The use of a 50-nm thick Mo interlayer on silicon substrates for the nucleation enhancement of microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) films synthesized by hot filament chemical vapour deposition was studied. The MCD and NCD films were deposited using methane concentrations of 1% and 2%, respe…