Materials Literature
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Prediction criterions for the formabilities of perovskite-type oxides are obtained by using the empirical structure map methods constructed by two parameters octahedral factor (r B /r O ) and tolerance factor, on this structure map, simple point representing systems of forming and non forming are distributed in distin…
In the scientific studies the influence of burning regime or composition of formation mix on the final properties of the ceramic bricks is analysed most often. However, drying regime is also of paramount importance in the process of the high quality ceramic production. The formed ceramic samples were dried according t…
The stoichiometric self‐propagating high‐temperature synthesis (SHS) thermite reaction involving magnesium (Mg), titanium dioxide (TiO 2 ), and boron oxide (B 2 O 3 ) forms MgO and titanium diboride (TiB 2 ) as final products. Selective acid leaching is used to remove the MgO leaving TiB 2 powder. This study investiga…
A field theoretical method for fluctuating hydrodynamics with preserved fluctuation-dissipation relations is reformulated. By assuming that the correlations including momentum are irrelevant in the long time region, we demonstrate that the equation obtained from the first-order perturbation is reduced to that for stan…
Abstract The effect of different surface sizing formulations on the chemical features of surfaces of the papers produced from Eucalyptus kraft pulp was studied. The surface analysis techniques, electron spectroscopy for chemical analysis and time-of-flight secondary ion mass spectrometry were applied. An uncoated base…
Collapse of an ice clathrate of type II structure containing tetrahydrofuran as guest molecules has been studied at different pressures by dielectric spectroscopy. The sample was pressurized to 1.3 GPa at 130 K and the resulting collapsed state was pressure cycled. The dielectric relaxation time increases at a progres…
The self-assembly and selective distribution of metal or metal oxide nanoparticles in block copolymer matrices was designed to produce photonic bandgap materials through a bottom-up method rather than the more common top-down approach. The synthesis of such materials consists of the in situ thermolysis of metal carbon…
The preparation and the characterization of three new dyads composed of a ruthenium trisbipyridine complex linked to a naphthalene bisimide electron acceptor via a phenyleneethynylene spacer of different length (one or two units) are reported. The dyads also differ by the anchoring position of the spacer on the bipyri…
Self-assembly, optical, and mechanical properties of surfactant-directed biphenyl-bridged periodic mesoporous organosilica thin films (PMOF-Bp's) with molecular-scale periodicity in the pore walls were successfully demonstrated for the first time. The biphenyl-bridged organosilica precursor, 4,4-bis(triethoxysilyl)bip…
Dy:YAG phosphor coatings were deposited using the solution precursor plasma spray process. The phase composition, microstructure, and photoluminescent properties of the as‐deposited coatings were investigated. X‐ray diffraction analysis confirmed that the coating is mainly composed of the YAG phase with a small amount…
Thermal stabilities of the zwitterionic glycine (zg) combined with water molecules are investigated by both ab initio/RRKM calculations and the thermostatic molecular dynamics (MD) simulations. The microhydrated zg clusters, zg-nw (n = 2, 3; w = water), can transfer to the canonical clusters cg-nw through the rapid in…
We present a technological approach to the realization of channeled optical waveguides, starting from reactively sputtered tellurite glass thin films, grown on silica-coated 4" Si wafers. In particular, optical lithographic process and etching recipes have been developed to overcome the solubility of TeO(2) films in a…
Carbon foam templates were prepared from a mixture of mesophase pitch (MP) and Si particles, followed by foaming and carbonization. Subsequent molten Si infiltrated into the carbon foam at 1500°C for 4 h in an inert atmosphere resulted in the formation of porous SiC ceramics. Micrographs were investigated by a scannin…
Ultra clean NiTi shape memory alloy was produced by electron beam melting of Ni rich vacuum inductionally melted butts together with pure Ti chunks in both condensed and electrographite crucibles. A hollow cathode discharge gun was used for heating up to 1623, 1653 and 1693 K and holding the charge materials under vac…
MoCl 5 was found as a new catalyst for the benzylation of anisole. In comparison to the general Lewis acid, such as FeCl 3, ZnCl 2, and AlCl 3, the reactivity of MoCl 5 was higher than AlCl 3 but lower than FeCl 3 under the same reaction conditions. When MoCl 5 was supported on HZSM-5 or TS-1 molecular sieve, the yiel…
Dense ZrW 2 O 8 was prepared by spark plasma sintering (SPS), using amorphous ZrW 2 O 8 nanopowder as a raw material, at 873 K for 10 min. We investigated the effects of SPS conditions, such as sintering temperature, heating rate, and the discharge power that is expressed as the product of pulsed direct current and vo…
Infrared transmitting glass–ceramics based on the selected glass of 65GeSe 2 –25Ga 2 Se 3 –10CsI were obtained by a two‐stage heat‐treatment method. Results of X‐ray diffraction and scanning electronic microscopy indicated that droplet‐like nanoparticles containing cubic Ga 2−δ Ge δ Se 3 crystals are homogeneously gen…
Electronic and magnetic properties of the Heusler alloy Co(2)Cr(0.5)Fe(0.5)Al(001) surfaces and its interfaces with GaAs(001) are studied within the framework of density functional theory by using the plane-wave pseudopotential approach. The phase diagram obtained by ab initio atomistic thermodynamics shows that the C…
A method for the growth and self-assembly of Fe(3)O(4) nanoparticles that is template assisted, as well as gas diffusion and surface tension controlled, has been developed at room temperature. Well-defined dendrite patterns of Fe(3)O(4) nanoparticles were obtained upon ion (Fe(3+)/Fe(2+)) entrapment in a polyethylene…
Liquid–liquid immiscibility, leading to the separation of silica‐rich and silica‐poor domains, is a common phenomenon in binary silicate glasses, but can be difficult to detect and characterize when rapid cooling results in nano‐scale domain dimensions. 29 Si nuclear magnetic resonance (NMR) spectroscopy can be very u…