Materials Literature
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Novel fluoride‐teminated hyperbranched poly(ether ether ketone) with 4‐phenoxyphenyl side group (HPEEK‐F) was prepared from 2‐(4‐phenoxyphenyl)‐1,4‐diphenol (A2) and 1,3,5‐tris[4‐(4‐flourobenzoyl) phenoxy]benzene (B3). An end‐capping approach was used to synthesize tertiary amino‐terminated fluorescent (HPEEK‐DMA) and…
It is a widely adopted approach to woven fabric design in industry, to define the construction parameters of the fabric to give a certain fabric unit weight. It is also equally important, from the engineering point of view, to design a fabric which fulfils the conditions of weavability and certain quality criteria. It…
The synthesis of catalytic filamentous carbon (CFC) on catalysts prepared by supporting Ni 2+ compounds onto the surface of various alumina modifications (macroporous α-Al 2 O 3 and mesoporous ϑ-Al 2 O 3 and δ-Al 2 O 3 ) using two procedures (impregnation and homogeneous precipitation) was studied. The texture charact…
Polyaniline (PANI)-based composite materials containing 5 to 65 wt % of multi-wall carbon nanotubes (MCNT) are prepared. Their electrochemical characteristics are studied, in particular, the effect of the MCNT content in the composite on the composite and PANI specific capacitance. The increase in the composite capaci…
We have synthesized heterostructured ZnO:S/ZnO 6-fold nanorotors through a one-step catalyst-free process during chemical vapor deposition. We performed a series of designed experiments to investigate the effect of growth temperatures, growth time, and the ratios between ZnO and FeS used as starting material on the gr…
The cubic perovskite-type SrFeO3 have been obtained by annealing under high oxygen pressure of 100 MPa at 600K. X-ray absorption fine structure (XAFS) observations on Fe K-edge have been performed from 25 K to 900 K to investigate the temperature variation of the local structure and oxidation state of iron ion in the…
In developing an effective production technology for bearing steel, attention focuses on the detection of the groups of nonmetallic inclusions that most impair the performance of IIIX15 steel. Converter production of bearing steel is promising in terms of compliance with current quality requirements.
The recovery of tritium, T, from neutron-irradiated Li by a Y plate was experimentally investigated, and a Y hot trap was designed to remove T from a flowing Li target loop of IFMIF. T generated in Li ranging from 0.01 to 0.05ppm in molar fraction was successfully removed by a Y plate at 300-500°. The ratio of recover…
The basic techniques of manufacturing of metal-polymer type hybrid elements were presented. Insert technique consists in preparation of elements with metal mold inserts by injection molding method. Outsert technique let improve the functionality of simple metal profiles by injection molding of polymer sub-elements. In…
Ferroelectric materials of Ba0.95RE0.05TiO3 and LiNb0.95RE0.05O3 (RE3+ = Eu3+, Sm3+, Dy3+ and Pr3+) have been prepared by a conventional solid state sintering method. By measuring excitation and emission spectra of the prominent emission bands, luminescence performance of these optical materials has been investigated.…
The development of optical gain in semiconductor nanocrystals requires a high concentration of electronic excitation energy. Generating and maintaining such a high excitation density is difficult because of fast Auger relaxation channels that operate under such conditions. In this article, the use of energy transfer w…
Energy-dispersive X-ray microanalysis technique has been widely used in failure analysis of wafer fabrication. However, we still face some common problems. In this study, we will introduce standardless element coefficients to improve accuracy of quantitative results, propose an estimating method to select beam acceler…
Technologies for manufacturing and poling the dynamic pressure gage based on ferroelectric polyvinylidene fluoride polymer are described. Results of theoretical and methodical investigations of the gage and pressure profiles measured with this gage behind the shock wave front in solids are presented.
ZrO 2 -CeO 2 (10, 18, and 23 mol % CeO 2 ) solid solutions have been synthesized via coprecipitation. The powders have been sintered at 1875 K, and the electrical conductivity and dielectric properties of the resultant ceramics have been studied. The dielectric relaxation observed in the ceramics can be understood in…
Abstract A theoretical study of the reaction path for the photo‐ring‐open mechanism for a model system 2 H ‐pyran has been carried out using a CASSCF method. To monitor the electronic rearrangements along the minimum energy pathway (MEP), the electronic structures were analyzed using valence bond (VB) theory and natur…
This study deals with the design and implementation results for a high-capacity vol-oxidizer (HCV that can convert UO2 pellets of up to several tens of kgHM/batch to U3O8 powder. Before fabricating the HCV, we fabricated a prototype that can process such a high capacity. From the analyses of some drawbacks of the prot…
Systems based on starch and chitosan blends with synthetic polymers and cellulose derivatives (poly(ethylene oxide) and methyl cellulose of various molecular masses, PA, and ethylene-vinyl acetate copolymers containing different amounts of vinyl acetate groups) have been studied. The thermodynamic characteristics of t…
Abstract Under irradiation the post-transition corrosion rates of Zircaloy are enhanced relative to out-of-flux rates. In an effort to better understand the effects of different mixed-field radiation environments and the variables that may contribute to this enhancement a series of in situ electrochemical impedance sp…
Defect-related photoconductivity of single ZnO nanowires is investigated. The photoconductivity shows power-law dependence with incident green laser intensity due to the defect mechanisms including both recombination centres and traps. The device based on single ZnO nanowire shows a sensitive photoresponse to green li…
This study investigated micro electro discharge machining (micro-EDM) of Polymethylmethacrylate (PMMA)/Multi-Walled Carbon Nanotube (MWCNT) nanocomposites. PMMA/MWCNT nanocomposites were fabricated using solution casting, in which MWCNTs were dispersed in the polymer-solvent solution via high energy sonication, follow…