Materials Literature
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Highly disordered graphitic carbon layers were formed on various types of commercially available silicon carbide (SiC) ceramics by reaction with chlorine and chlorine-hydrogen gas mixtures at 1000°C. The carbon was produced ranging from only a few micrometers to hundreds of micrometers thick. When a platinum sample ho…
A copolymer of glycidyl methacrylate and styrene (PGS) was synthesized by emulsion polymerization. The effect of the polymer on paper dry- and wet-strength improvement was investigated. The polymer contains phenyl groups that provide hydrophobic character to fibers so as to improve paper wet performance, and glycidyl…
A DNA fragment that carried the gene (proA) encoding 4-hydroxy-4-methyl-2-oxoglutarate aldolase was cloned from the chromosomal DNA of Pseudomonas ochraceae NGJ1, and the coding region was assigned to the nucleotide sequence based on the N-terminal amino acid sequence of the enzyme purified from the organism. The proA…
A full Cu damascene metallization process was successfully developed for simultaneous formation of sub-0.18 /spl mu/m RF CMOS passive components including circular spiral inductor and MIM capacitor. High quality factor inductor with Q=18 at 1.2 nH was achieved by applying highly uniform Cu CMP process on polishing mic…
Catalysts based on manganese oxide and modified with Ag (AgMn0.10) or Ba (BaMn0.10) were prepared and applied to CH4 deep oxidation. The catalysts were characterized by means of N2-BET, XRD, XPS, CH4-TPR and O2-TPD techniques. Catalytic evaluation results show that both AgMn0.10 and BaMn0.10 exhibit higher CH4 oxidati…
A new modeling method using a uniaxial medium model has been proposed to obtain a simple and quantitative expression for the transmittance of an in-plane switching (IPS) mode. In this model, the effective birefringence ( Δ n eff ) and the apparent optic axis rotation angle (φ app ) are used instead of the original bir…
Photoluminescent and triboluminescent (TrL) properties of PZT materials at room temperature were investigated for the first time in this study. Two emissions centered at 2.0eV and 3.0eV were observed, respectively, which were explained by the self-trapped behavior of the intrinsic defects. Moreover, the strong TrL was…
Fundamental deformation and deformation-recovery behaviors of Ni-Ti-Nb shape memory alloy were experimentally investigated, especially their dependency on test temperature. Monotonic tension tests and deformation-recovery tests were conducted at low and high temperatures ranging from 253 K to 473 K. Stress-strain resp…
Ruthenium(II) complexes containing the macrocycle 1,4,8,11-tetrathiacyclotetradecane ([14]aneS4) and nitrogen-coordinated nitrile ligands were prepared using cis-[Ru(DMSO)4Cl2] as the starting material. The first synthetic step consisted of introduction of the thioether ligand to give [Ru([14]aneS4)(DMSO)Cl]Cl. Substi…
The poly(propylene imine) dendrimers DAB-dendr-(NH2)8, DAB-dendr-(NH2)32, and DAB-dendr-(NH2)64 were fully converted with iodomethane to quaternary ammonium ions at both chain ends and branch points and, with less iodomethane, were partially converted to quaternary ammonium ions mainly at end groups. Amidation of the…
Trinuclear, μ3-oxo mixed metal acetato complexes, [CoMn2(μ3-O)(MeCO2)6(py) 3] (py = pyridine) encapsulated in zeolite HY, exhibit high catalytic efficiency in the selective aerial oxidation of para-xylene to terephthalic acid; interestingly, the formation of 4-carboxybenzaldehyde, the worrisome impurity in the convent…
The challenges of scale and corrosion control in a number of new HT/HP fields in the North Sea, such as the Heron cluster wells in the ETAP (Eastern Trough Area Project) development, are substantially more severe than those normally encountered. The extreme reservoir conditions (T > 175 °C, P ~13,500 psi, TDS > 350,00…
For the insulation diagnosis of GIS, it is necessary to detect partial discharge (PD) under noisy condition and to specify the direction of electromagnetic wave radiation due to PD. We proposed "phase gate control method" for discriminating the electromagnetic wave caused by PD in SF/sub 6/ gas from external noises. T…
Mechanical alloying and mechanical grinding have been used to synthesize or treat AB, AB2, and AB5 type alloys and Mg-based hydrogen storage materials. A nanocrystalline or an amorphous structure was obtained after milling, depending on the system and its composition. The structure and the hydrogen storage properties…
Epitaxial growth of yttria-stabilized zirconia (YSZ) thin films on Si (001) substrates containing SiO2 layers of various thickness was in-situ monitored by reflection high-energy electron diffraction (RHEED). The inplane lattice parameter of YSZ at the initial stage of the deposition (the thickness of YSZ was below 5n…
Using variational techniques, we study the properties of the director field of a nematic liquid crystal in steady cylindrical flow, assuming that such a steady flow exists. In particular, we construct an energy functional of which a steady director field would be a stationary point, and we show that, when strong ancho…
A comparative study of the influence of acetone, isopropyl alcohol and mixtures of ethanol-acetone and ethanol-isopropyl alcohol on the cellulose structure during alkalization is presented. The kinetic behavior and distribution of substituents in the carboxymethylation stage are explained tentatively. It is shown that…
A kinetic study of catalytic methanol decomposition to carbon monoxide and hydrogen over nickel supported on silica has been carried out with a flow reaction system in the temperature range of 433–498 K. The active site probably consists of a pair of nickel atoms which can strongly adsorb hydrogen and carbon monoxide.…
This paper develops a feature decomposition-based modular neural network (MNN) for the recognition of partial discharge (PD) sources. The original statistical analysis-based feature set is naturally partitioned into three disjointed feature subsets. These subsets are independently fed into three neural subnetworks. Th…
The structure, magnetic properties and Mössbauer effect on Sr2Fe1 − xMxRe1 − yM′yO6 (x = 0, 0.1; y = 0, 0.1; M = Sc; M′ = Nb) phases with partially ordered double perovskite structures are presented. The Nb and Sc substitutions affect the magnetisation values but the Tc values remain unaltered around 400 K. Mössbauer…