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。
Two types of water detritiation systems have been designed for fusion reactors of ITER scale. One of the systems is a combination of WD (Water Distillation) and VPCE(vapor phase catalytic exchange) columns. The other is a combination of a WD column and a CECE(combined electrolysis catalytic exchange) column. Three wat…
Thin solid films of titanyl phthalocyanine (TiOPc) and vanadyl phthalocyanine (VOPc) have been vacuum evaporated onto glass substrates held at various temperatures in the range from -30 to 240°C. FT-Raman spectra have been collected using an Nd:YAG laser emitting at 1064.1 nm, a Michelson interferometer and an InGaAs…
Abstract Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy has been used to determine the nature of acid sites present in Na + -, Ni 2+ - and Al 3+ -exchanged montmorillonite using the diagnostic base, pyridine. The pyridine additions were performed in situ at 25°C in the presence of liqu…
Nezilovite, ideally PbZn 2 (Mn (super 4+) ,Ti (super 4+) ) 2 Fe 8 O 19 , is a newly recognized member of the magnetoplumbite group from Nezilovo, FYR Macedonia. It forms black, magnetic crystals up to 1 mm with a tabular, hexagonal outline. Electron-microprobe analyses yielded PbO 19.01, CaO 0.03, Sb 2 O 5 0.25, ZnO 1…
In situ, high-temperature Raman spectroscopy of Na,O.9SiO, glasses and melts with and without 2 mol% P,05 has been conducted to 1491 K (near the liquidus temperature). In the temperature range from 298 to ~ 1000 K (below the glass-transition temperature range), orthophosphate (PO~-) complexes appear to be the dominant…
Sediments recovered during Ocean Drilling Program Leg 151 at Site 907 from the Iceland Plateau have good recovery and a pristine paleomagnetic record. Well-preserved diatoms are present throughout the middle Miocene to upper Pliocene interval and in the Holocene of Site 907. The stratigraphic occurrence of diatom spec…
The motion of bubbles in a Hele–Shaw cell driven by a surrounding fluid or by gravity has been studied. Assuming that the surrounding fluid wets the solid wall and that the bubble surface is rigid due to the surfactant influence, the translational velocity of an elliptic bubble is estimated. The result indicates that…
Some aspects of the crystal chemistry of the bismuth-containing layered ferroelectrics of the Am−1Bi2BmO3m+3 type are discussed: conditions for the existence of the compounds, behavior of compounds of Am−1Bi2BmO3m+3 + nA′B′O3 series, two ways of the solid solution formation, peculiarities of the ferroelectric state, i…
Dissociative adsorption of methyl iodide at 300 K on Si(100) was followed by multiple-internal reflection Fourier transform infrared spectroscopy. The absorption spectrum shows only two peaks in the CH stretching region (2890 and 2955 cm−1) which are assigned to the symmetric and antisymmetric CH stretching modes of…
The suitability off a Y2O3:Eu3+ scintillator for use in radiation detectors and medical image receptors was studied. Y2O3:Eu3+ was used in the form of laboratory prepared screens of different coating thicknesses. The x-ray luminescence efficiency of the screens was measured for tube voltages between 50-200 kVp and in…
Abstract Flax‐nonwoven reinforced polypropylene has become a competitor to textile glass fabric reinforced polypropylene because of its economic and ecological advantages. Suitable application forms are needle‐punched 100% flax or hybrid fabrics of flax/polypropylene manufactured of rough and fine decorticated flax. T…
Abstract The extensive initial loss of efficiency of antioxidant [4,4′‐thiobis(3‐methyl‐6‐tertbutylphenol)], during hydrostatic pressure testing of medium density polyethylene pipes at 95 and 105°C has been studied. Samples from the pressure‐tested pipes were subsequently investigated by scanning electron microscopy a…
We have studied the influence of halide and halate ions on the enhancement factors of surface-enhanced Raman scattering (SERS) in the near-infrared (NIR) wavelength region. It was found that not only an electromagnetic enhancement mechanism but also a chemical enhancement mechanism contributes to the total surface enh…
The density of the low-rate (<0.1 nm/s) sputtered molybdenum films can be controlled between 48% and 96% of the bulk material by the variation of argon pressure from 4.7 to 0.45 Pa. Small angle x-ray scattering shows the existence of columnar voids with a typical size of 10 nm, especially in the low-density fil…
Abstract The effect of heat treatments on the swelling, dispersion, particle charge and particle aggregation of Li-, Na-, K-, Mg-, Ca- and Al-Wyoming bentonite was investigated. Before thermal treatment, unheated (25 °C) Li-, Na- and K-clays showed increased d 001 spacing on glycerol solvation and dispersed spontaneou…
Abstract The geometry of threading dislocations (TDs), non‐equilibrium defects that are generated as a result of stress relaxation in thin films, is considered in order to provide a basis for their reduction behavior during heteroepitaxial growth. This paper, the first of a two‐part series, discusses the geometric pos…
Abstract In aqueous media substituted protoporphyrins and amphiphilic tetraphenylporphyrins aggregate to fibers, tubules, helical ribbons and sheets. Six different types are presented, characterized by the excitonic shifts in the electronic absorption spectra. On excitation, the aggregates from octopusporphyrin show f…
Discomfort results when sweat accumulates on the skin. The sorption of water vapor by hygroscopic clothing near the skin and its release when the clothing moves away from the body can enhance sweat removal. Such a process depends on the relative humidity being higher near the skin than in the ambient atmosphere, and m…
Gypsum and halite are the most common salts in reg soils developed on alluvial parent material under extremely arid conditions in the Negev Desert, Israel. The aim of this paper is to document the changes in the micromorphology of these salts at different stages of Reg soil development on two alluvial fan chronosequen…
Tension‐tension cyclic‐fatigue tests of a two‐dimensional‐woven‐SiC‐fiber‐SiC‐matrix composite (SiC/SiC) prepared by chemical vapor infiltration (CVI) were conducted in air at room temperature and in argon at 1000°C. The cyclic‐fatigue limit (10 7 cycles) at room temperature was ∼160 MPa, which was ∼80% of the monoton…