Materials Literature
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La corrosion induite par les micro-organismes, le plus souvent appelée biocorrosion, implique tous les phénomènes de corrosion où les micro-organismes agissent directement soit par l’intermédiaire de leur métabolisme (production d’acides, de sulfures, ...) en jouant un rôle primordial, en accélérant un processus déjà…
カーボンブラック (CB) 充てんポリプロピレン (PP) /ポリエチレン (HDPE) ポリマーブレンドの電気抵抗率に及ぼすCB粒子の局在化の影響について検討した. まず, CB粒子をPPと混合した. 引続きCB/PP複合材料とHDPEとを混合して, 逐次混練複合材料を作製した. 最初PP相中に分散していたCB粒子は, 逐次混練試料中ではPP相からHDPE相へ移動しようとする. その結果, CB粒子はPP/HDPE界面に局在化する. PP相およびHDPE相がともに連続相であるとき, PP/HDPE界面に局在化したCB粒子はブレンド中で導電性ネットワークを形成することが期待される. 逐次混練試料は同時混練試料よりも低い常温電気抵抗…
We describe a strategy for the design of noncentrosymmetric organic thin films with thermodynamically stable polar order. We report the thermal and optical properties of a group of hydrogen bonding liquid crystalline (LC) monomers. The self-assembly of these LC materials could lead to improved polar stability and proc…
The title compound, La14V6CuO36.5, was prepared from a stoichiometric mixture of La2O3, V2O5, and CuO at 1050–1080 °C. The compound forms transparent, pale green crystals and was characterized by wavelength dispersive spectroscopy and single crystal X-ray diffraction. The structure contains isolated VO43− tetrahedra a…
Thermal diffusivity of synthetic forsterite was measured in the temperature range from 350 to 1500 K at 0 and 6 GPa. Reciprocal thermal diffusivity cannot be regarded as a linear function of absolute temperature. Thermal diffusivity of forsterite increases by ca. 40% over 6 GPa.
Crystal structures of CVD diamond particles were observed in detail by transmission electron microscopy. The particles were deposited on silicon substrates under various conditions and had different levels of adhesion. An interlayer of SiC was found along the interface obtained with low methane concentration in the so…
Four-point bending tests were conducted with smooth specimens of poled and non-poled lead zirconate titanate (PZT) ceramics with a tetragonal structure. The specimens poled in the longitudinal, transverse and shorttransverse directions were called PL, PT and PS specimens, respectively. The non-poled specimens were cal…
The aim of this work was to get a better understanding of the O 1s binding energies Eb(O1s) in complex glasses of interest in nuclear waste storage in relationship with the mean charge on the oxygen atoms, relevant to acidic/basic properties of the glass. Three different glasses were considered: an aluminum borosilica…
Nanostructured spinel NiZn ferrites were prepared by the sol-gel method from metal nitrate raw materials. Analyses by X-ray diffraction and scanning electron microscopy showed the average particle size of NiZn ferrite was under 50 nm. The single phase of NiZn ferrites was obtained by firing at 250℃, resulting in nanop…
In the last thirty years, ongoing and fast developments of numerical techniques for the particular questions concerning electrical machinery can be noticed. This development can be seen in parallel with the efforts and success of the softand hardware computer industry in producing powerful tools. Computers as well as…
The electrochemical polymerization of catechol on platinum has been carried out using repeated potential cyclingbetween -0.2 and 1.1 V (versus SCE). The electrolytic solution consisted of 0.2 mol dm-3 catechol, 0.5 mol dm-3 NaCl and0.1 mol dm-3 Na2HPO4 with pH 8.72. Catechol can not be polymerized at pH ≥ 10.12. Polyc…
Influence of carboxymethyl cellulose (CMC) on the inhibition efficiency of 1-hydroxyethanole-1,1-diphosphonic acid (HEDP)- Zn2+ system in controlling corrosion of mild steel immersed in a neutral aqueous environment containing 60 ppm Cl- has been evaluated by weight loss study. The formulation consisting of 10 ppm Zn2…
Ferrites with the spinel structure have a wide field of technological applications. In the present study, various ferrite (Fe, Co and Ni-Zn) nanoparticles were synthesized by mechanochemical reaction in aqueous solution of various chlorides (FeCl3, CoCl2 and NiCl2/ZnCl2) and NaOH in a horizontal ball mill. Structures,…
Ten compounds were obtained from the acetone extract of Polygonum aviculare and their structures were elucidated as kaempferol, quercetin, juglanin, astragalin, avicularin, quercetrin, myricitrin, desmanth-1, loliode and syngaresinol bassed on their spectral data, respectively.
With the combination of redox reaction and co-precipitation, a series of Sn-Fe-Cr composite metal oxide catalysts with various compositions were prepared, which exhibit higher specific surface areas, thermal stability and CH
An integrated method for power plant analysis, including rotating component matching and CFD simulation of the combustion process, is applied to the study of gas turbines supplied with hydrogenated fuels originating from the natural gas reforming. The method proposed by the authors allows estimation of the power plant…
As dicarboxylate complexes of transition metal possess potentially useful electronic and magnetic properties, [Mehrotra and Bohra (1983). Metal Carboxylates. Academic Press, London], much interest in their synthesis and structure has been apparent recently [Kaneko and Tsuchida (1981). J. Polymer Sci . , Macromolecular…
High temperature deformation and fracture of the Al–Mg–Mn sheet consisting with the coarse-grained surface and the fine-grained center layers have been investigated. Such a microstructure was produced by the continuous cyclic bending (CCB) and the subsequent annealing. The elongation to failure has a peak value at 713…
The objective of the present work is to determine the local crystal growth rate in an imperfectly mixed suspension crystallizer. Experiments were carried out in pure potassium sulphate-water solution. The steady-state Crystal Size Distributions (CSDs) were measured at four different heights of the crystallizer using a…
For quantitative analysis by AES and XPS, it is important to test the theory and to use the correct sensitivity factors. We develop our previous analyses of peak area intensities for elemental spectra in digital Auger and X-ray photoelectron databases measured using a fully calibrated spectrometer. The intensities, in…