Materials Literature
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A deep analogy between the processes of low-temperature thermally induced relaxation of plastic deformation in amorphous polymers and inorganic glasses is observed. The results of the calculation of the activation energy and activation volume of this relaxation process in terms of the excited state model satisfactoril…
New complex sodium lanthanide phosphate molybdates Na2MIII(MoO4)(PO4)(MIII=Tb, Dy, Ho, Er, Tm, Lu) have been synthesized by the ceramic method (T = 600°C, τ = 48 h), and their unit cell parameters have been determined. The structures of Na2MIII(MoO4)(PO4)(MIII = Dy, Ho, Er, Lu) were refined by the Rietveld method. The…
2‐Methylene‐1,3,6‐trioxocane (MTC) and maleic anhydride (MA) were copolymerized in the presence of a radical initiator. Elemental analysis suggested that the obtained copolymer consisted of alternating monomer units. After hydrolysis of the MA carboxylate anhydride functionality, the copolymer exhibited good calcium i…
Abstract The high‐density rigid polyurethane foam (RPUF) was obtained by airtight cast molding. The morphology development during the compressive fracture process of RPUF was observed on‐line by a scanning electronic microscope (SEM). In the early stage of loading, the deformation of samples came from the tiny shape c…
Almost impurity and defect-free barium titanate (BaTiO3) nanoparticles with various sizes from 20 to 430 nm were prepared using 2-step thermal decomposition method. The nano-structures of these particles were analyzed using a synchrotron radiation X-ray diffraction (XRD). As a result, it was found that the BaTiO3nanop…
The structure of amorphous silicon oxynitride formed under nitridation conditions using ammonia gas, before the onset of silicon nitride crystallization, is determined employing high‐energy X‐ray diffraction (HEXRD) technique. The derived real‐space function suggests that smaller ring structures, especially 3R and 4R…
Abstract The complexes Ni(dmeds)(dmit), Ni(dmedt)(dmit), Ni(dpedt)(dsit), Ni(dpedt)(dmit), and Ni(dcdt)(dmit) (where dmeds is dimethylethylenediselenolate, dmedt is dimethylethylenedithiolate, dpedt is diphenylethylenedithiolate, dcdt is 1,2-bis-decylsulfanyl-ethene-1,2-dithiolate, dmit is 1,3-dithiol-2-thione-4,5-dit…
The irradiation creep-swelling interaction parameters were pecisely derived for MONJU fuel pin cladding PNC316 by irradiation tests of pressurized tubes in FFTF. It was found out that a creep-swelling coupling coefficient decreased and asymptotically approached a constant value as the swelling progresses, although it…
The graft copolymerization of acrylonitrile (AN) and ethyl acrylate (EA) comonomers onto cellulose has been carried out using ceric ammonium nitrate (CAN) as an initiator in the presence of nitric acid at 35±0.1°C. The addition of ethyl acrylate as comonomer has shown a significant effect on overall and individual gra…
Abstract Silicon membranes with through pores have been manufactured based on silicon plates with a gradient‐porous structure (GPSi), in which the pore cross section and structure varies with depth. The obtained structure can serve a basis for the development of electrodes for solid polymer fuel cells. The developed t…
Interactions in the ternary system K2MoO4-Lu2(MoO4)3-Hf(MoO4)2 have been studied by X-ray powder diffraction and differential thermal analysis. A new triple (potassium lutetium hafnium) molybdate with the 5: 1: 2 stoichiometry has been found. Single crystals of this molybdate have been grown. Its X-ray diffraction str…
A series of liquid crystalline compounds having the difluoropropyleneoxy moiety (–OCF2C2H4–) as a linking group has been synthesized. The physical properties, i.e. dielectric anisotropy, birefringence, viscosity and phase transition temperatures, have been measured. This novel class of compounds shows a larger negativ…
The electronic structures of SrMn1−xFexO3 (0⩽x⩽1) have been investigated by using photoemission spectroscopy (PES) and soft x-ray absorption spectroscopy (XAS). Mn ions in SrMnO3 are found to be in the nearly tetravalent (Mn4+) states, but with a small mixture of the Mn2+ configuration. With increasing x in SrMn1−xFex…
The large range of tetragonal and rhombohedral phase coexistence in BiFeO3-PbTiO3slid solutions and the spontaneous disintegration of certain samples is investigated using X-ray diffraction. It is concluded that internal stress associated with the large spontaneous strain in the tetragonal phase is relieved by local t…
Ultracapacitor is an emerging device for energy storage that can replace batteries in some short-term applications. Due to the fact that the terminal voltage of an ultracapacitor varies with the level of energy stored, a power electronic converter with voltage boosting capability is usually needed at its terminals to…
A set of silicate ions and corresponding lithium salts have been quantum chemically (QC) simulated in a “free molecule” approach. The infrared (IR), inelastic neutron scattering (INS), and Raman spectra have been simulated and fitted to the experimentally registered ones. The complete assignment of the vibrational ban…
Among spinel ferrites, Cd and Zn ferrites are always normal ferrites with Cd and Zn ions locating only in tetrahedral sites. This study presents effect of Zn on the magnetic and magnetocaloric properties of the mixed spinel ferrites Ni 1-xZn xFe 2O4 (x = 0.60, 0.65, 0.70, 0.75). The presence of Zn affects lattice para…
The quenching rate, which is dependent on the surface velocity (Vs) of Cu wheel during melt spinning, has significant influence on the formation of nanocomposite structure in the Fe52Pt32B18 melt-spun ribbons. The L10-FePt∕Fe2B hard magnetic nanocomposite structure was formed at Vs=20–37m∕s, while the soft magnetic fc…
The taxa belonging earlier to the diatom genus Melosira from slides in the Granow collection at the Natural History Museum in Vienna, were investigated using the light microscope (LM). Raw material related to several slides were also found and observed using the scanning electron microscope (SEM). According to valve m…
We demonstrate a technique of applying the prism-coupler method to the characterization of dielectric films that are too thin to support enough guided modes in air for the normal application of the method. The technique is based on applying suitable index-matching liquids on the surface of the thin film to increase th…