Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Series of dimeric compounds of different skeletal shapes consisting of two triad aromatic ester type mesogenic moieties connected via polymethylene spacers were synthesized and their liquid crystalline properties compared. The two mesogenic units are connected in either Hor T-shape or in linear fashion. In general, it…
To clarify the extension of the triple phase boundary (TPB), which directly affects the electrode polarization behavior, in the cermet layer of the Ni-zirconia anode, we studied the anodic polarization properties of four types of Ni-zirconia cermets (Ni-0YZC Ni-3YZC, and Ni-8YZC) on three types of zirconia electrolyte…
A number of new ruthenium polypyridyl complexes with mono- or di-(3-methoxystyryl) substituted bipyridines have been synthesized. The complexes were characterised by NMR, elemental analysis, UV-vis absorption and emission spectroscopy, and cyclic voltammetry. Electroactive polymer films of these complexes have been pr…
It is found that, with decreasing thickness of the crystals of TaS 3 and NbSe 3 quasi-1D conductors, the dependences of the conductivity of these crystals on temperature and electric field change from the form typical of bulk samples to a nearly power law behavior typical of 1D electron systems.
The high frequency EPR spectra of SrAl2O4 doped with gadolinium(III) as a probe are discussed, focusing on the sites occupied by the lanthanides. This is because the emission due to europium(II) of SrAl2O4:Eu,Ln (Ln: lanthanides) is significantly affected by such substitution. The EPR spectrum of SrAl2O4:Dy,Gd showed…
Glasses of the composition (100 − x) SrB4O7 (SBO)−x Bi2VO5.5 (BiV) (0 ≤ x ≤ 70) were fabricated by the splat quenching technique. The evolution of nanocrystallization of bismuth vanadate in the system 50 SBO–50 BiV (in mol%) was accomplished via controlled heat-treatment (in the temperature range 470–820 K) of the as-…
This paper presents results of analytical and experimental studies that give insight into the nature and mechanism of the generation of localized losses in the core joints, losses caused by core stacking-holes, and the increase of iron loss of the core material due to slitting. These three loss components alone have b…
The vapor-phase catalytic oxidation of benzyl alcohol was carried out over cerium-impregnated NaZSM-5 (Ce/NaZSM-5) and K-added Ce/NaZSM-5 catalysts. The main products were benzaldehyde and carbon dioxide, together with trace amounts of benzene and toluene. The effect of the added K on the catalytic activity in the ben…
Surface analysis techniques have been used to study the adsorption behavior of corrosion inhibitors on mild steel in carbon dioxide (CO2)-saturated brine media. In particular, polarized grazing angle Fourier transform infrared spectroscopy (PGA-FTIR) and x-ray photoelectron spectroscopy (XPS) have been used to investi…
This article deals with the transcrystallization of polypropylene on untreated, MAH-polypropylene grafted, and alkali treated jute fibers due to isothermal as well as non-isothermal crystallization conditions. In both cases, TCL-thickness as well as TCL growth initiation temperature were dependent on fiber treatment.…
Addition of [Ru(bpy)3][PF6]2 to [(C6H13)4N]4[S2Mo18O62] in CH3CN resulted in the formation of analytically pure [Ru(bpy)3]2[S2Mo18O62]. Insolubility in CH3CN and solubility in DMF allow solid state and solution phase electrochemical data to be compared. Voltammetric studies of [Ru(bpy)3]2[S2Mo18O62] adhered to a glass…
Soybean oil was epoxidized using peracetic acid prepared in situ from acetic acid and hydrogen peroxide with Dowex 50 W-8X as a catalyst. The epoxidized soybean oil was allowed to react with methylamine. The resulting adduct was identified and emulsified. The emulsified methylamine adduct was added at different concen…
Poly( o -aminophenol) (PoAP) film was electrodeposited on an indium-tin oxide electrode. The PoAP film electrode captured dissolved cations such as Fe 3 + because of the coordination ability of the film. The cation capturing ability was confirmed by the X-ray photoelectron spectroscopy and the cyclic voltammograms of…
This book should be a valuable reference for experienced metallurgists, mechanical engineers, and students seeking a practical technical introduction to metallurgy. Contents are based on lectures designed for undergraduate students in mechanical engineering, and the book is an excellent introduction to the fundamental…
areas in electroanalytical chemistry for the past two decades has been modification of electrode properties by the immobilization of redox-active species onto the electrode surface by their incorporation into a polymer (1-3). For example, one common application has been the immobilization of enzymes (together with med…
Abstract: The acoustic pressure waves associated with partial discharges in HV power transformers can be detected with external piezoelectric sensors. The propagation time and the waveshape of the received signals are affected by factors such as the sensor position, internal barriers and sensor type. These are investi…
Water trees result from ac electrical aging of the polymeric insulation of medium and HV power cables in a humid or wet environment. As suggested by their name, they arise from penetration of water in the polymer. Visual observation with the help of an optical microscope shows tree (bush) type structures. This suggest…
Piezocone soundings were performed in residual silts and fine sands of the U.S. Atlantic Piedmont geologic province to investigate penetration pore-water pressures and subsequent dissipation characteristics in these “nontextbook” geomaterials. Piedmont residuum has been formed by the in-place weathering of Paleozoic s…
Resistance degradation of Pb(Mg1/3Nb2/3)O3–Pb(Zn1/3Nb2/3)O3–PbTiO3 (PMZNT) relaxor ferroelectrics during nickel electroplating was investigated by resistivity measurement and X-ray photoelectron spectroscopy (XPS) through the appearance of changes in Nb 3d and Pb 4f spectra. It was found that the insulation resistance…
Benzyltrimethylammonium hydroxide is found to be a very efficient catalyst for nitroaldol condensation in a short time with excellent yield.