Materials Literature
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It's proved that a reaction exists in poor grade carbonatite and modified water glass system at ambient temperature. The reaction products are identified as hydrated calcium (magnesium) silicate by SEM, XRD and EDX and the reaction mechanism is discussed.
The corrosion of Al (99.99% in mass) in deaerated methanol with and without H2O, NaCl, and HCOOH as contaminants was investigated using immersion corrosion tests, potentiodynamic polarization tests, electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). The content of H2O in deaerate…
Beta-cyclodextrin can act as an efficient inhibitor of the photosensitized dimerization of thymine by para-aminobenzoic acid (PABA) in aqueous solution. This can be explained by considering the formation of an inclusion complex between PABA and beta-cyclodextrin.
The adsorption characteristics were investigated with differently sized agglomerates of zeolite particles for moving-bed applications. As a result, the saturation amount of NO gas adsorbed on the agglomerates was almost the same as that of the primary particles, and thus the negligible influence of binder was confirme…
Two new homologous series of 4-cyano- and 4-nitro-N-(4-alkoxysalicylidene) anilines were synthesized. The phase transitions of these homologues were determined by using a differential scanning calorimeter and an ordinary polarizing microscope. It is shown that all the homologues having a terminal cyano group exhibit a…
Flux-cored are welding (FCAW) has increased recently because of high welding efficiency. However, a small amount of bismuth in the weld metals was a residue from the flux component that was added for improving slag detachability. The effect of small amount of bismuth in austenitic stainless steel weld metal on corrosi…
Three-dimensional simulations of bidisperse bubble swarms rising in a liquid have been carried out. This article describes the microstructure of a swarm of mostly spherical bubbles representing 6% void fraction. The swarm consists of an equal number of large and small bubbles with volume ratio 2. While the behavior of…
Electron spin resonance (ESR) studies show that electron irradiation of an f -TeO 2 single crystal followed by 330-nm UV illumination at ∼10 v K generates a new spin-1/2 paramagnetic center having C 2 symmetry, like the Te lattice sites, that is attributed to a self-trapped charge on a Te. Identification is facilitate…
The crystal structure and the dielectric properties of (1 m x )Pb(Yb 1/2 Nb 1/2 )O 3 m x Pb(Sc 1/2 Nb 1/2 )O 3 (PYN 1 m x PSN x ) (0 h x h 0.50) solid solution have been studied. According to our XRD study, the room temperatures crystal structure of PYN 1 m x PSN x becomes pseudocubic from the PYN's orthothombic with…
The number of materials systems used to make magnets on an industrial scale is limited. They are, in chronological order of appearance, AlNiCo (late 1930s), hard ferrites (1950s), the family of Sm-Co magnets which gave rise to two different magnet groups, SmCo5 (late 1960s) and Sm(CoFeCuZr)7–8, often referred to as th…
The pulsed electroacoustic (PEA) method has been used to measure space charge distributions in insulating materials. A high-resolution PEA measurement system and signal procedure have been reported in previous papers. Since the signal procedure is necessary for high-resolution measurement, the system must include a co…
Magnetic properties and structures of TiN-, TiCN- and TiC-coated silicon steel sheets were investigated. The tensile stress in these ceramic coated silicon steel sheets and adhesion were also determined by measuring the angle curvature after coating one side with ceramic and by observation after 180° bend-forming, res…
Epitaxial (Ni-Zn)Fe2O4 thin film was prepared on Si(001) substrates using (MgO-Al2O3)/CeO2/YSZ triple buffer layer. In this work, to increase remanent magnetization (Mr) and decrease coercive field (Hc), for epitaxial (Ni-Zn)Fe2O4 thin film, the effect of substrate temperature, oxygen pressure and composition on the m…
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…