Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Eu 2+ -doped SrAl 2 O 4 phosphors were synthesized using a solid-state reaction method. The structural and the luminescent properties of the phosphors were investigated by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and photoluminescence (PL) excitation and emission spectra. Sr…
Here we report the eect of the irradiation by 167 MeV Xe 26+ ions (in the uence range up to 310 12 ions/cm 2 ) on the undoped and Cd-doped (0.4, 0.5 at.%) ZnO lms deposited by radiofrequency magnetron sputtering.
The stability of emulsions and foams stabilized with hexylamine-modified silica particles has been studied as depending on the concentration of the surfactant. Silica modification with short-chain hexylamine leads to a marked increase in the contact angle upon selective wetting and inversion of the phases in the emuls…
The influence of the structure factors (sizes of grains and precipitates) on the dislocation structure formed in polycrystals and alloys behind the shock wave front (elastic precursor) has been theoretically discussed in terms of the dislocation kinetic relationships and kinetic equation for the dislocation density. T…
SnO2 and Sn:In2O3 nanowires were grown on Si(001), and p-n junctions were fabricated in contact with p-type Cu2S which exhibited rectifying current–voltage characteristics. Core-shell Cu2SnS3/SnO2 and CuInS2/Sn:In2O3 nanowires were obtained by depositing copper and post-growth processing under H2S between 100 and 500…
The diffuse reflection spectra of coatings based on ZnO powders modified by SiO 2 nanoparticles are investigated in the range of 360–2100 nm. Spectral variations caused by irradiation with accelerated electrons ( E = 30 keV, Φ = 1 × 10 16 –7 × 10 16 cm −2 , P = 10 −6 Torr, and T = 300 K) are analyzed. It is ascertaine…
Induction heating/hydrothermal treatment is a novel technology for preparing a well bonded and covered coating on conductive materials. In this study, induction heating method was first used to deposit a monetite coating on pure magnesium, and then hydrothermal treatment was applied to convert the monetite to a hydrox…
Asymptotic formulas have been derived for distribution functions in cylindrical slits with finite cross-section radii. The problem has been solved based on the asymptotic principle of interbody interactions within the framework of dispersion forces. Symmetric and asymmetric slits between two identical cylinders and be…
Technical implementation of the microstrip antenna array of segmented design has been proposed. It is shown that at the expense of using heat-resistant materials the antenna array has stable parameters of radiation at high temperatures and can be used for radio engineering systems of hypersonic aircraft. The investiga…
The effect of UV-exposure on the properties of wood-polypropylene composites containing mineral fillers weathered in natural and accelerated conditions was studied. The changes in the colour of the composites after weathering were evaluated by spectrophotometry, and the changes of Charpy impact strength were measured…
Results from studying the effect conditions of growth (atmosphere of growth) and subsequent treatment (annealing in air and in vacuum) have on the optical properties of crystalline lanthanum-gallium tantalate and possible processes that occur in the crystal structure upon the emergence of defects (e.g., the formation…
Titanium dioxide (TiO 2 ) film has photocatalytic properties and good biocompatibility. To expand the film application, formation of oxygen deficiencies in the film was one of the useful methods. Electrical resistance of the film can be decreased due to oxygen deficiencies formation. The local heating process in vacuu…
Nanocrystalline ZnO, ZnO-Zn, and ZnO-Zn-Fe powders with a specific surface area up to 45 m2/g and a low Fe concentration (no more than 0.619 wt %) have been prepared using pulsed electron beam evaporation. The crystal structure, morphology, and size of the nanoparticles have been determined using X-ray powder diffract…
The problem of finding structural features of growing structures for which a specified growth shape is allowable is considered within the model of layer-by-layer growth of tilings or packings and the generalization of this model to connectivity graphs. In particular, the problem of revealing growth shapes that are imp…
The distribution functions of the valence and torsion angles of the hydration shells of proteins and bulk water are obtained by computer simulation. The obtained dependences are compared, and the differences between them are explained in terms of the topological regularities of the structures.
Natural composites (biocarbons) obtained by carbonization of beech wood at different carbonization temperatures T carb in the range of 800–2400°C have been studied using X-ray diffraction. The composites consist of an amorphous matrix and nanocrystallites of graphite and graphene. The volume fractions of the amorphous…
Liquid-crystalline mono-and binuclear complexes of Fe(III) based on pentadentate Schiff’s base, N,N ′-bis(2-hydroxy-4-octadecyloxybenzyliden)-1,7-diamino-4-azaheptane, have been prepared for the first time. The effects of counterions of the binuclear complexes and of the monodentate ligand in the mononuclear complexes…
Silver halides represent a yet unexplored avenue for imparting antimicrobial activity in calcium phosphates. Silver halide colloids were added to calcium phosphate. Concurrent melting of silver halides and crystallization of carbonated apatite was achieved by heating to increase the silver halide surface area availabl…
SiC continuous fiber reinforced SiC ceramic matrix composites (SiC f /SiC CMCs) and SiC fiber reinforced SiC micro ceramic matrix composites (SiC f /SiC micro-CMCs) were prepared through polymer impregnation pyrolysis (PIP) progress, then the structures, mechanical properties and forming mechanisms of SiC f /SiC CMCs…
The crystal and magnetic structures of anion-deficit cobaltite La0.5Ba0.5CoO2.8 have been studied by the X-ray and neutron diffraction methods at high pressures up to 30 and 6 GPa, respectively. A structure transition from the cubic phase with symmetry $Pm\bar 3m$ to the tetragonal phase with symmetry P4/mmm has been…