Materials Literature
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Homogeneous solid solutions and heterogeneous systems of the general formula R2 − x Mn x O3 ± δ (0.90 ≤ x ≤] 1.10 for R = Y and 0.88 ≤ x ≤ 1.14 for R = Yb; Δx = 0.02) were produced by ceramic synthesis from oxides in air within the temperature range 900–1400°C. The solubility boundaries of simple oxides R2O3 (R = Y, Y…
The physical and computational model of self-assembly in an evaporating microdrop of solution several hundreds of picoliters in volume is described as a further development of dissipative particle dynamics (DPD) methods used in systems with a changeable volume. The simulation results are compared with experiments on t…
Nanorods of vanadium oxide doped with alkali metal ions M x V2O5 · nH2O (M = Na, K, Rb, Cs, x = 0.31–0.44) have been obtained under hydrothermal conditions. The particles are 30–80 nm in diameter and a few micrometers in length. The chemical state of atoms and their concentration ratios have been studied by XPS. It ha…
Abstract Sr 2 MgSiO 5 :Eu 2+ phosphors were synthesized through a high temperature solid state reaction method. The phase and luminescence properties of the samples were characterized by X‐ray diffraction (XRD) and a luminescence spectrometer. The effects of RE 3+ (RE = La, Ce, Pr, Sm, Dy, Ho, Er, and Tm) on the lumin…
Abstract— Carbon nanotubes have quickly emerged over the last several years as a potential candidate material to replace metal oxides in devices which require transparent and conductive electrodes. Typically, these materials are coated onto substrates such as PET and PEN for flexible electrodes and glass for rigid ele…
The results of investigation of deformation fields in the block of a three-crystal X-ray silicon interferometer subjected to ion implantation by X-ray diffraction moir patterns are presented. The condition of applicability of the expression to determine the moir pattern period when intracrystalline deformations are es…
The electronic structures and optical properties of undoped and Al-doped GaN (Al x Ga 1−x N, x=0.0625, 0.125, 0.25) have been studied based on generalized gradient approximation (GGA) method of density functional theory (DFT). The differences of the electronic structures and optical properties of undoped and Al-doped…
A free-base tetraarylporphyrin was synthesized by the [2+2] macrocyclization of a dipyrromethane derivative with 3,4,5-tris(dodecyloxy)benzaldehyde in 61% yield. The free-base porphyrin was metallated with zinc acetate in 94% conversion. The free-base and metallated porphyrins show typical intense Soret bands at 426 a…
A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to those with ultrafine grain size of a copper matrix. This study was aimed to investigate mechanical properties, electrical conductivity and microstructure in stri…
The finite-element M3D code [W. Park et al., Phys. Plasmas 6, 1796 (1999)] has been modified to include a free-boundary equilibrium solver with arbitrary toroidal and poloidal flows. With this modification, the M3D code now has the capability to self-consistently model two essential ingredients necessary for equilibri…
The structure of film composites based on methyl cellulose and fillers, such as montmorillonite and silver nanoparticles stabilized by poly(vinylpyrrolidone) (Poviargol), is studied by X-ray diffraction. In the composite, montmorillonite nanoparticles exist in the exfoliated state; when the content of the nanoparticle…
The kinetics and products of the thermal decomposition of hexamethylenetetraammonium dodecahydro-closo-dodecaborate in air, argon, and a vacuum were studied using thermogravimetry, volumetry, mass spectrometry, and IR spectroscopy. According to the nonisothermal kinetic data, noticeable rates of the formation of volat…
Titanium-metal-matrix composites (Ti-MMC) are materials with very large specific resistance and potential operative temperature up to 800° C. At present these composites are produced by Hot Isostatic Pressing (HIP), a reliable but expensive manufacturing method. To cut production costs, Centro Sviluppo Materiali SpA (…
Abstract An industrial liquid–liquid extraction process for reprocessing of spent nuclear fuel will inevitably lead to radiolysis of the phases, since the process streams contain highly radioactive species. Solvents containing one of the BTBP (6,6′-bis(5,6-dialkyl-[1,2,4]-triazin-3-yl)-2,2′-bipyridine) molecules inten…
Nanocapsules containing hexadecane and Fe 3 O 4 magnetic nanoparticles as core materials and polystyrene as shell were produced in a new method through emulsifier-free miniemulsion polymerization using 2,2′-azobis(2-amidinopropane) dihydrochloride (V-50) as a water-soluble initiator. The effect of some parameters such…
In the same conditions, the transformer on-line monitoring and off-line chromatographic analysis should be consistent, but the actual on-line monitoring is effected by the ambient temperature to make it is different from the off-line chromatographic measurement. this paper analyzes the theory of oil-gas separation, an…
A chelating polymer poly(2-hydroxy-4-methacryloyloxy benzaldehyde hydrazone) poly(2H4MBH) was prepared in N,N-dimethylformamide (DMF) at 70 ° C using benzoyl peroxide as initiator. Poly (2H4MBH) was characterized by infra-red and 1 H-NMR spectroscopic techniques. The molecular weight of the polymer was determined by g…
The Tb60Ni30Al10 amorphous alloy was prepared by melt-spinning in the form of ribbons. Its magnetic behavior shows upon magnetization the occurrence of a spin glass to ferromagnetic and a paramagnetic to ferromagnetic transitions at 5 and 48 K. The magnetocaloric effects associated with these transitions were investig…
A novel quaternized polysulfone with N-dimethylethylammonium chloride (DMEA) and N-dimethyloctylammonium chloride (DMOA) pendent groups was investigated, as to its optical and electronic properties. Optical properties were investigated by refractivity and transmission spectra. To obtain the optical parameters, the app…
The superior piezoelectric properties of all polycrystalline ferroelectrics are based on the extent of non-180° domain wall motion under electrical and mechanical poling loads. To distinguish between 180° and non-180° domain wall motion in a soft-doped and a hard-doped lead zirconate titanate (PZT) ceramic, domain tex…