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。
In the previous papers it was shown that the mechanical properties of spider threads taken from Nephila clavata called Jorougumo in Japan were excellent and thus the threads were expected to be one of the most useful materials in future, if produced in large quantities. In this paper, the analyses of composition and c…
An analytic solution for the kinetics of nonlinear (upconversion) luminescence quenching in solid- state laser materials and other luminophosphors is obtained under the assumptions of hopping character of migration- assisted energy transfer and finite excitation life-time. It is shown how the observables of the lumine…
The tensile properties of a commercially available, random continuousfiber thermoplastic composite material are investigated at various strain rates and elevated temperatures. The material utilizes polypropylene (PP) for the matrix material, with random continuous E-glass fiber reinforcement. Tensile modulus, tensile…
Currently, long-circulating pharmaceuticals and pharmaceutical carriers represent a huge and still fast growing area of biomedical research. The critical evaluation of the state-of-the art, long-circulating drugs and drug carriers, reviews and discussions on the current approaches and strategies in the design and prac…
Diffusion coefficients (D) of blowing agents and air in cellular plastic insulation are the key parameters in determining the thermal quality and dimensional stability of the foams. Measurement methods available for this purpose are briefly discussed. An apparatus based on the so called diffusion chamber method has be…
The application of sulfur-nitrogen free-radicals as molecular ‘bricks’ for the construction of novel magnetic materials is described and exemplified by the dithiadiazolyl radical, which becomes weakly ferromagnetic at 36K.
Magnetic and mechanical properties have been investigated in Fe-4 to 7.8 wt% Si rapidly quenched and annealed ribbons. The roles played by composition and microstructure on the magnetic energy losses and the tensile stress-strain behavior have been put in evidence, by carrying out the related experiments as a function…
The microstructure of Ni-YSZ anode was investigated in terms of the suppression of Ni sintering. The spray pyrolysis method was applied for synthesis of the NiO-YSZ composite powder. The morphology of obtained powder consisted of die fine YSZ particles dispersed on the surface of NiO particles. It was observed that on…
The reaction mechanism of oxygen electrode has been studied by impedance spectroscopy in order to improve the performance of a solid oxide fuel cell. Reproducible impedance spectra was confirmed by using the improved cell, consisting of a thin YSZ disk and sintered platinum electrodes. The spectra measured for an O 2…
To obtain efficient humidity regulation effects in buildings, development of porous materials impregnated with chlorides was attempted. In a series of experiments, two types of calcium silicate boards and three types of building stones were used as base materials. For impregnated chemicals not only lithium chloride wh…
SummaryVarious types of micro-filters were made of anodic oxide films of aluminium by dissolving Al substrate and barrier layer partially in the form of a circle. The diameter of the micro-pores in the fillers were controlled by bath voltage during anodizing and by pore-widening technique. The flow rate of distilled w…
UNLABELLED: Scanning electron microscopy (SEM) studies were performed on chemically stabilised ultra-high molecular weight polyethylene (UHMWPE) samples. The samples were sterilised by gamma radiation under a nitrogen atmosphere, packed under the exclusion of oxygen, and subjected to a special stabilising process. We…
耐熱性の熱可塑性エラストマーであるスチレンーエチレンブチレンースチレントリブロックコポリマー (SEBS) のミクロ相分離構造と力学特性の相関について, 種々の組成のSEBS試料を用いて検討を行った. 各試料の秩序構造のモルホロジーは小角X線散乱法によって解析した. その結果, 球状, シリンダー状, ラメラ状モルホロジーの組成による変化を詳細に検討することができた. 各モルホロジー境界をポリスチレンの体積分率 (φPS) を用いて表すと, φPS≈0.12 (球/シリンダー), 0.24 (シリンダー/ラメラ) であった. これらの値は, SEBSの水添前の前駆体であるスチレンーブタジエンースチレントリブロックコポリマーで報告さ…
The domain structure which takes place in the phases surrounding a reconstructive phase transition is discussed. Three different examples belonging to distinct classes of reconstructive transitions are considered: 1) Transitions between crystal structures, 2) Crystal-Quasicrystals, 3) The lamellar-cubic transition in…
The anodization of Si «100» and «111» wafers in dilute HF solutions has been investigated, with particular reference to probing the surface chemistry and features between the porous and electropolishing regions (the ‘boundary transition’ region). Conditions have been found for inducing the formation of ordered arrays…
Peel strengths of five pressure-sensitive styrene-butadiene emulsion polymers, having different amounts of gel and different glass transition temperatures, have been determined as a function of temperature and peel rate. For each peel rate, the peel strength reaches a maximum at a particular temperature, and this maxi…
We present an optimal approach for designing polarizing beam splitters made of a sheet of birefringent material. The polarizing beam splitter is in the form of a transmission diffraction grating with a surface-relief structure of periodic sawtooth shape. We describe the necessary conditions for optimal design and deri…
In on-line isotope separation, rapid efficient release of short-lived radioactive products from thick targets has traditionally been accomplished by the use of refractory target materials heated to elevated temperatures. At high temperatures, (∼2000 °C) the diffusion rate of the desired product from the target matrix…
We report here effects of microdomain structures on the mechanical properties of polystyrene-block-polyethylenebutylene-block-polystyrene (SEBS) triblock copolymers. Microdomain structures were analyzed by the small-angle X-ray scattering technique and the mechanical properties were evaluated by the viscoelastic measu…
Block copolymers of poly(ethersulphone) (PES) oligomers with liquid crystalline polyester units were synthesized by the reaction of dihydroxy-terminated poly(ether sulphone) oligomers (number-average molecular weights: 704, 1,158 and 2570) and terephthaloyl bis(4-oxybenzoyl chloride), and their properties were investi…