Materials Literature
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Solid solutions between ilmenite (FeTiO 3 ) and hematite (α-Fe 2 O 3 ) are one of the candidates for high-temperature magnetic semiconductors. Well-crystallized epitaxial x FeTiO 3 -(1- x )Fe 2 O 3 (0.5< x <1) films were prepared on both α-Al 2 O 3 (001) and (110) single-crystalline substrates by reactive sputtering t…
木粉含有率26.5%から55.8%の木粉とポリプロピレンとの複合材(WPC)を, 実大装置を用いて押出成形により調製し, 耐水性を評価した。水中浸漬試験では, 水分浸透速度は木材素材と比較して非常に遅く, 恒量に達するまでに6ヶ月から20ヶ月を要した。質量および寸法変化は木粉含有率と共に大きくなる傾向が認められ, 木粉含有率30%以下において耐水性能が著しく高くなった。高湿度下では, 試験1年後でも質量の増加が見られた。煮沸試験では, 16時間で水中浸漬試験6ヶ月程度の質量増加が得られた。また, WPC の水中浸漬, 高湿度下, 煮沸の各試験において寸法変化に異方性が見られた。WPC は初期耐水性は高いが, 長期間の湿潤状態におい…
Optical absorption spectra for a series of GaMnN samples with different Mn content grown by metal-organic chemical vapor deposition have been investigated. Compared with GaN, the absorption coefficient of Ga1-xMnxN increases in the UV region and an absorption peak can be observed near 144 eV. In addition, the absorpt…
This article reviews more than 50 references covering the solvent sublation as one of the adsorptive bubble separation methods for organic and inorganic coumpounds removal from aqueous solutions, which were published last 50 years. The solvent sublation is very simple, effective and fast process for removal and separa…
The main drawback of protein NMR spectroscopy today is still the extensive amount of time required for solving a single structure. The main bottleneck in this respect is the manual evaluation of the experimental spectra. A clear solution to this challenge is the development of automated methods for this purpose. At th…
Highly branched polymers (HBPs) were prepared via free-radical polymerization of methacrylic acid (MAA) with polyfunctional allyl co-monomer (Mono-trimethylolpropane trimaleate, MTPTM) at various n(MAA)/n(MTPTM) ratios. HBPs were employed in retanning wet-blue pigskins and the retanned leathers were evaluated by their…
Series of Ga-doped Sc 2- x Ga x W 3 O 12 samples ( x =0, 0.05, 0.1, 0.2, 0.3, 0.5, 0.8) were synthesized by solid state reaction at 1100 ℃. Rietveld refinement of the X-ray powder diffraction patterns show that Ga substituted Sc in Sc 2- x Ga x W 3 O 12 structure successfully. The client component Ga 2 W 3 O 12 cannot…
The geometry structure, electronic structure, total energy, Mulliken changes of He atom in the Al octahedral site and tetrahedral site were studied by first-principle plane-wave pseudopotential method and GGA. The calculation results indicated that the crystal lattice of Al was changed when He atom enter to the inters…
Two different silage cover films, one made of standard polyethylene (PE) and the other made of Mater-Bi® biodegradable plastic (MB), with two different thicknesses (60 and 120 )m) have been compared. A whole maize crop was chopped, treated with a mixture of Lactobacillus plantarum, L. buchneri, and Enterococcus faeciu…
Structural and electronic properties of clean polar ZnO surfaces are studied by using the first-principles ultra-soft pseudo-potential approach to the plane wave, based on the density functional theory. Furthermore, the relaxations, bandstructures, and densities of states for ZnO(0001) and ZnO(0001) surfaces and the N…
ABSTRACT The possibility of applying birchwood xylan in pape rmaking process to improve dry strength of paper was investigated. Unmodified xylan barely adsorbed onto pulp fibers while cationically modified xylan adsorbed substantially. Adsorption of cationically modified xylan by quaternarization with 3-chloro-2-hydro…
The X-ray luminescence spectra of doped lithium tetraborate have been analyzed on the basis of accounting the set of spectral transitions for different atomic charge states.It has been shown that the X-ray luminescence peculiarities are to a great extent due to the transitions between the energy levels of dopant atoms…
Pulping properties of the imported mixed eucalyptus chips and the domestic yellow poplar chips were investigated for comparing two chips as the raw materials for the hardwood chemical pulp. Soda-AQ (anthraquinone) pulping was applied for this study. The pulp from yellow poplar showed higher pulp yield than pulp from m…
The wettability between porous MgAl2O4 substrates and molten iron was investigated by the sessile drop method at 1833 K as a basic study in order to elucidate the interactions between molten iron and a refractory material. For the study, MgAl2O4 substrates with 2, 8, 13, 27, and 39% porosity were prepared. The contact…
This paper describes the first phase of the California warm-mix asphalt study, in which a test track was constructed to compare performance, under accelerated pavement and associated laboratory performance testing, of a control mix, produced and constructed at conventional hot-mix asphalt temperatures, with three mixe…
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The concept of a fatigue limit at 106 cycles that was introduced by Wohler in 1850 seems nowadays to be the wrong magnitude when considering the fatigue life of modern industrial applications such as automotive engines that run typically billions of cycles. The necessity to increase performances in terms of lifetime a…
The year 2009 has seen many advances in supramolecular chemistry. This short review highlights a number that have been made by various research groups. In line with previous articles from this series, the review is split into three broad sections encompassing molecular recognition, structure and assembly, and function…
The Discrete-Continuous Model, a coupling between dislocation dynamics and finite elements simulations, is used for modelling size effects in the mechanical properties of single-crystal superalloys. Both formation and evolution of the dislocation microstructures are analysed, and the crucial role of the storage of sig…
This article reviews the literature reported during 2009 on conducting solids including both ionic and electronic conductors. The review focuses in particular on materials which have relevance in solid oxide fuel cell, lithium ion battery and superconductor applications.