Materials Literature
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The effects of alumina particle size and content on densification of a low-temperature cofired crystallizable K 2 O–CaO–SrO–BaO–B 2 O 3 –SiO 2 (TG) glass+alumina system have been investigated. The densification is improved by decreasing alumina content, or increasing alumina particle size. This is attributed to compet…
A technological process of removing a complex-shaped ceramic core from the interior of GTE thin-walled blade castings is considered. We propose an aluminium oxide-based method for removing a core by leaching accompanied by process intensification with a carboxylic acid additive.
The effect of silica and calcium carbonate fillers on the properties of woven glass fibre composite has been studied with an attempt to observe the amount of property loss due to replacement of expensive resin by cheap fillers. The silica and calcium carbonate fillers of the amount 25% and 50% respectively of the weig…
Single crystals of different phases of misfit cobalt oxides have been synthesized. Using these materials, the intrinsic power factor has been determined. By combining thermopower S and Hall coefficient measurements, we will show how S can be tuned by doping in this family of materials, the doping being strongly depend…
The anticorrosion performance of the surface film on octadecylamine (ODA) treated iron in electrolytes containing chloride, sulphate and carbonate ions was studied by electrochemical impedance spectroscopy (EIS). The EIS measurements for iron samples treated with various ODA concentrations revealed that the highest co…
A compact X-ray tube with a field emitter based on carbon nanotubes is developed. Over a long time interval, the X-ray tube maintains an anode current of 300 μA, an anode voltage of 10 kV, and the stable characteristics of the field emitter.
Nanocompósitos de polietileno de alta densidade/argila bentonita foram preparados por meio da técnica de intercalação por fusão. Para a modificação da argila foram utilizados quatro tipos diferentes de sais quaternários de amônio visando a sintetizar argilas organofílicas. A argila não modificada e modificada com os q…
The U.S. Army Research Laboratory (ARL) and Australian Defense Science and Technology Organization (DSTO) have ballistically baselined a range of armor steels (277-321HB to 477-534HB) manufactured by the Australian company, Bisalloy Steels. Plate was tested in thicknesses from 10 mm to 20 mm and ARL and DSTO ballistic…
For the first time hydrodynamic cavitation induced by a liquid whistle reactor (LWR) has been used in conjunction with the advanced Fenton process (AFP) for the treatment of industrial wastewater. Semi-batch experiments in the LWR were designed to investigate the performance of the process by optimising various parame…
The aberration of a multipole Wien filter for energy-filtered x-ray photoemission electron microscopy was analyzed and the optimized Fourier components of the electric and magnetic fields for the third-order aperture aberration corrections were obtained. It was found that the third-order aperture aberration correction…
The kinetic peculiarities of CO oxidation on WO 3 promoted with Pt or Pd were studied. In the region of low catalyst activity (the degree of CO conversion below 20%), the reaction was found to be zero-order in CO and first-order in oxygen. In the high-activity region (CO conversion above 95%), the reaction order was f…
Abstract Surface morphology and chemical composition at n‐type GaN surface after photoelectrochemical reactions were investigated. Whisker‐like Ga oxides were observed in the lower pH solutions and hexagonal columns were observed in the higher pH solutions. The results indicate that different reactions occur in the di…
Thermal properties, crystallization behavior and isothermal crystallization kinetics of poly(ethylene terephthalate) (PET) composites filled with nanophase carbon black (CB) have been investigated by differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA) and wide angle X-ray diffractometer (WAXD).…
The near infrared long lasting phosphorescence of Yb3+ is observed in Yb3+ and Mn2+ codoped zinc borosilicate glasses. Compared with the glasses solely activated by Mn2+, when the Yb3+ ion is codoped, the red long lasting phosphorescence of the samples is largely improved in both brightness and persistent time but the…
The atomic structure of synthetic, deuterated melanterite (FeSO4·7D2O), a 14.0774(9), b 6.5039(4), c 11.0506(7) A, β 105.604(1)°, space group P 21/ c , Z = 4, has been refined from the combined refinement of 2.3731(1) A and 1.3308 A neutron powder-diffraction data to a R wp (tot) = 3.01% and R p (tot) = 2.18%. Both th…
Poly(vinyl chloride) (PVC) has been reacted with 2-amino-5-(phenyl)-1,3,4thiadiazole(LI), 2-amino-5-(p-nitro phenyl)-1,3,4-thiadiazole(LII), 2-mercapto-5-phenyl 1,3,4oxadiazole(LIII) and 2-mercapto-5-(p-hydroxy phenyl) 1,3,4-oxadiazole(LIV) in THF to form the modified PVC , which has been characterized by spectroscopi…
Abstract Thermogravimetry, X‐ray and electron diffraction and high resolution electron microscopy show that the reduction process from perovskite La 0.5 Ca 0.5 MnO 3 to brownmilleriteLa 0.5 Ca 0.5 MnO 2.5 is a reversible topotactic process. Two series of monophasic La 0.5 Ca 0.5 MnO 3– δ oxygen‐deficient perovskites w…
The impact behavior of multi-ply fabric was modeled considering different fabric features. The viscoelastic yarn model was adopted to represent the dynamic behavior of fibers. Yarn pullout on the fabric edges was considered as well as yarn slippage on the warp and weft crossovers. Crimp straightening, slippage on the…
We study the electronic structures of Mn X ( X =As, Sb, and Bi) in a ferromagnetic phase based on the density functional theory within the local spin density approximation using a fully relativistic full-potential linear-combination-of-atomic-orbitals method. In particular, we focus on the effects of spin–orbit coupli…
Abstract A new type of carbonylation of styrenes was achieved under a 1:1 mixture of CO (0.5 atm) and O2 (0.5 atm) in the presence of Pd(OAc)2 combined with H5PMo10V2O40·nH2O to give 4-methyl-2-phenylnaphthalen-1(4H)-one in 78% yield. Various substituted styrenes were also carbonylated to the corresponding substituted…