Materials Literature
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The effect of neutralization conditions of TiO2 acid sol obtained by hydrolysis of titanium tetraisopropoxide (the nature of monovalent cation (Li+, Na+, NH4+) of electrolyte, chemical nature of a dialyzing solution, and surface modification of nanoparticles with glycidyl isopropyl ether (GE)) on TiO2 dispersion and c…
The optical properties of GeO x film and GeO x /SiO2 multilayer heterostructures (with thickness of GeO x layers down to 1 nm) were studied with the use of Raman scattering and infrared spectroscopy, ellipsometry and photoluminescence spectroscopy including temperature dependence of photoluminescence. The observed pho…
New insights into the formation mechanism of a polymerized mesophase (space group Im 3̅ m ) and its derived order mesostructured carbon phase (denoted FDU-16) were evidenced by a slight modification of its synthesis conditions using proton nuclear magnetic resonance (NMR) relaxometry ( T 2 spin–spin relaxation time),…
The ongoing debate on climate change and emission restrictions for greenhouse gases also forces the search for SF6alternatives (sulphur hexafluoride) in the energy transmission and distribution sector. Hence several challenges for the asset manufactures result as changing the insulating medium implies a redesign of th…
The emerging field of ubiquitous electronics has placed new requirements and challenges on the design and fabrication of RF systems. Graphene electronics, with its extremely flexible surface and excellent transport properties, has the potential to play a key role in such applications, especially for building analog IC…
Mechanochemical interaction between iron and gallium has been investigated. The multistage character and the dynamics of mechanochemical formation of the gallium solid solution in iron have been established. X-ray diffraction, electron microscopy, and atomic force microscopy have been used for studying structural and…
Nesta pesquisa, objetivou-se avaliar o potencial de utilização da madeira de Schizolobium amazonicum "Paricá" e Cecropia hololeuca "Embaúba" para produção de painéis cimento-madeira. Foram produzidos painéis experimentais com densidade nominal de 1.200 kg/m³, utilizando cimento CP V ARI como aglutinante mineral e part…
The Brazilian market of wood panels is in a consolidation process and presents great dynamism, which requires the search for new alternative raw materials that may contribute in quantity and quality to the continuous increase of this economic sector. Transforming residues generated by Brazilian agricultural industry a…
Abstract Lead‐free glass‐ceramic composites in barium sodium niobate silica system with Gd 2 O 3 addition were synthesized through melt‐casting followed by controlled crystallization technique. Crystallization and dielectric properties of the Gd 2 O 3 adding glass‐ceramic composites were investigated. With the increas…
A method for direct measuring the magnetostriction of ferromagnetic films (deposited on nonmagnetic substrates) in using an atomic force microscope was suggested. In measuring the magnetostriction for films 10 [mm] in length and 0,2 [μm] in thickness, which were deposited on substrates 200 [μm] thick, the minimum meas…
A percolation model has been proposed to explain an insulator-conductor transition in ultrananocrystalline diamond films upon addition of nitrogen to a gas mixture used to synthesize films. An observed jump of the conductivity by 10–12 orders of magnitude is a result of the rearrangement of the structure of films lead…
The mechanism of image drift in the observation of a boundary between a metal and an insulator by scanning electron microscope (SEM) is clarified by electron-trajectory simulation and experiment. In the region involving a straight boundary between a large-area metal layer and an insulating substrate, the largest image…
A phosphorus (P)-doped ultrathin n + layer is formed on crystalline silicon (c-Si) using radicals generated by the catalytic cracking reaction of phosphine (PH 3 ) gas with a heated catalyzer. The carrier concentration and the depth distributions of P atoms are investigated by Hall effect and secondary ion mass spectr…
This paper presents some of the key technologies in the area of fuel performance that Korea Atomic Energy Research Institute (KAERI) has developed for a dual-cooled annular fuel, which should be available before the annular fuel can be considered to be used in a commercial nuclear power plant. First, considering the c…
TiO 2 -SiO 2 xerogels have been synthesized by the hydrolysis of tetrabutoxytitanium-tetraethoxysilane mixtures in a 10% aqueous ammonia vapor and concentrated hydrochloric acid vapor atmospheres under static conditions. The dependence of the physical and chemical properties of the xerogels on the synthetic conditions…
Quantitative X-ray diffraction (XRD) analysis is performed on 172 samples mainly containing paleosol sections of Unayzah and Basal Khuff clastics taken from the core of one well drilled by Saudi Aramco. Quantitative XRD bulk mineralogical determination is achieved using the Rietveld refinement method whereas quantitat…
This paper presents the significant role deposition pressure plays in the deposition of high quality ITO films by RF magnetron sputtering. ITO target was sputtered onto bare sodalime glass under various deposition conditions. Particularly, the deposition pressure was varied against several other parameters, until the…
The crystalline phases formed in tungsten oxide (WO3 − x ) films upon isothermal step annealing in vacuum and air at various temperatures within 500–750°C have been studied. The films were deposited onto silica glass substrates by reactive dc magnetron sputtering. It is established that the observed thermochromism is…
We have investigated the relation between ferroelectric and magnetic orders of orthorhombic (o-) LuMnO3 ceramics. The increase of dielectric constant ɛ exceeds 82% near incommensurate to commensurate E-type antiferromagnetic (AFM) spin ordering transition temperature TL, reflecting a large magneto (thermo) dielectric…
Abstract Colorless, transparent single crystals of the lanthanum oxoarsenate(III) La[AsO 3 ] emerged after exposing an equimolar mixture of La 2 O 3 and As 2 O 3 to high pressure (11.5 GPa) and high temperature (1000 °C). The air‐ and water‐stable compound crystallizes isotypically with K[ClO 3 ] and thus can be descr…