Materials Literature
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In recent years, HVDC cables have been greatly improved, 500kV XLPE DC cable has been developed, and many XLPE DC cables of lower applied voltage have been used in HVDC systems. However, there still is not a unified standard for testing high voltage DC extruded cable systems, only a recommendation. Furthermore the rec…
The stability of clay minerals is an important factor in assessing the durability of containment barriers for deep waste storage. In that context, the complete thermodynamic data set of three 2:1 ferro-magnesian clay minerals have been determined at 1 bar and from 2 to 520 K, using calorimetric methods. The studied cl…
Abstract The crystal structure of chalcoalumite, ideally Cu 2+ Al 4 (SO 4 )(OH) 12 (H 2 O) 3 , monoclinic, P 2 1 /n , Z = 4: a 10.228(3), b 8.929(3), c 17.098(6) Å, β 95.800(11)°, V 1553.6(1.5) Å 3 , has been refined to R 1 = 3.08% for 4,022 unique observed (4σ) reflections collected on a Bruker D8 three-circle diffra…
NADH:quinone oxidoreductase or complex I is a large membrane bound enzyme complex that has evolved from the combination of smaller functional building blocks. Intermediate size enzyme complexes exist in nature that comprise some, but not all of the protein subunits in full size 14-subunit complex I. The membrane spann…
Heusler alloy Co 2 FeAl (CFA) nanoparticles have been synthesized by reducing a mixture of the precursors: CoCl 2 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O and AlCl 3 ·6H 2 O under H 2 atmosphere. XRD, SEM and TEM techniques have been used for the characterization of the prepared material. XRD and SAED data from TEM show the forma…
Highly disperse silicon carbide is synthesized using a hybrid method comprising the sol-gel step to provide the SiO 2 -C starting mixture involving the formation of a transparent gel and carbothermal synthesis under relatively soft conditions, namely, at temperatures of 1200–1500°C under a dynamic vacuum. The elementa…
By partial substitution of the chlorine atoms in hexachlorocyclotriphosphazene for halophenols and subsequent reaction of the resulting halogenated phenoxy phosphazene and 2,2-di(4-hydroxyphenyl)propane monophenolate hydtoxy-aryloxy phosphazenes were synthesized with a molecular weight of 1100–1400 g mol −1 . Epoxide…
Abstract The new mineral leverettite (IMA 2013-011), ideally Cu 3 CoCl 2 (OH) 6 , was found at the Torrecillas mine, Salar Grande, Iquique Province, Chile, where it occurs as a supergene alteration phase in association with akaganéite, anhydrite, chalcophanite, goethite, halite, manganite, pyrite, quartz and todorokit…
Summary It is demonstrated that epoxidized natural rubber (ENR) may be efficiently crosslinked by dicarboxylic acids in presence of 1,2‐dimethylimidazole. The activation mechanism of the crosslinking involves the formation of an imidazolium dicarboxylate salt. The formation of ester bridges is ascertained by solid‐sta…
The effect of La3+ ions substitution on the magnetic properties of the composition Li0.5−0.5xZnyLaxFe2.5−0.5x−yO4 (0.02 ≤ x ≤ 0.1; y = 0.6) was studied. The structure of the samples was investigated using X-ray, SEM and IR. Both of zero field cooled (ZFC) and field cooled (FC) modes magnetization were studied at low t…
Electronic absorption and fluorescence spectra based on transmission measurements of thin layers obtained from new perylene–zeolite L composites and new dye1,dye2–zeolite L sandwich composites, the latter acting as antenna systems, have been investigated and analyzed. The influence of extra- and intraparticle self-abs…
We have investigated the low-temperature physical properties of ${\mathrm{BaTi}}_{2}{\mathrm{Sb}}_{2}\mathrm{O}$ and ${\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{Na}}_{x}{\mathrm{Ti}}_{2}{\mathrm{Sb}}_{2}\mathrm{O}$ ($x=0.05$, 0.1, 0.15, 0.2, 0.25, 0.3) by means of muon spin rotation ($\ensuremath{\mu}$SR) and SQUID magn…
SWNT thin films with different nanotube densities are fabricated by CVD while controlling the concentration of catalyst and growth time. Three layers of SWNT films are transferred to flexible substrates serving as electrodes and channel materials, respectively. All-carbon nanotube TFTs with an on/off ratio as high as…
Field experience shows that the long-term existence of the partial discharge (PD) in gas-insulated switchgear (GIS) will gradually erode the insulation and ultimately cause disastrous insulation breakdown. The decomposition compound analysis of SF6in GIS is an effective method to diagnose the PDs caused by insulation…
Silicon carbide (SiC) is an inorganic material which has non-linear conductivity characteristics. When mixed nano-size SiC into silicone rubber (SIR), the composites can achieve non-linear conductivity characteristics also. In this paper, the non-linear conductivity properties of 5wt%, 15wt%, 30wt%, 45wt% nano-SiC/SIR…
Nanosized layered silicates with a montmorillonite structure of varying composition were synthesized under hydrothermal conditions (350°C, 700 atm). The hydrothermal treatment was applied to gels with the compositions calculated with the use of an ideal formula of the final product Na2x (Al2(1 − x), Mg2x ) Si4O10(OH)2…
The effects of two main processing parameters such as reheating temperature and reheating time on microstructure and tensile properties of thixoforged AZ63 magnesium alloy have been investigated. The results indicate that these two parameters all have large effects on the microstructure and tensile properties. However…
We report studies on the magnetocaloric effect of samarium doped lanthanum manganites with different Sm-concentrations. Polycrystalline La 0.7- x Sm x Ca 0.30 MnO 3 (0≤ x ≤0.3) samples were prepared using the conventional solid-state reaction method with phase purity and structure confirmed using X-ray diffraction. Te…
Detection of partial discharge (PD) with an antenna as ultra high frequency (UHF) sensor at a frequency of 300 MHz - 3 GHz has been widely used and proven to be an effective away for diagnosis of insulation in gas insulation switchgear (GIS). Various types of antennas have been developed to obtain better sensitivity a…
The mechanical and chemical stabilities of implant materials when used in the human body are critically important. While exposed to corrosive human body fluid, implants simultaneously experience considerable loadings and thus, may undergo environmentally assisted cracking (such as stress–corrosion cracking). This arti…