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。
Films of amorphous hydrogenized carbon (a-C:H) are prepared by chemical vapor deposition using a dc glow discharge. The absorption is studied over wavelengths of 400–2400 nm. Two Gaussian-like bands are identified with peaks at ∼600 and ∼800 nm. The ratio of the integrated intensities of these bands (I 600/I 800) is f…
The effect of palm oil fatty acid on curing behaviour and mechanical properties of epoxidized natural rubber (ENR 25 and ENR 50) and one grade of unmodified natural rubber (SMR L) was investigated in the concentration range of 0 to 7.0 phr. Results indicate that scorch and cure times increase with palm oil fatty acid…
The flux growth method, with Na2B407 as flux, was successfully used to produce high-quality single crystals of spinel with composi tions corresponding to solid solutions of spinel s.s. (MgAl204) -magnesioferrite (MgFe3+204) and spinel s.s. -hercynite (Fe2+ Al204). Some interme diate terms of spinel s.s. -gahnite (Zn…
Beryllium has found applications in the nuclear industry as components in weapons and nuclear reactors, in the aerospace industry for special structural applications and in precision navigational instruments such as gyroscopes. The purity of the beryllium is known to have a large impact on its mechanical and chemical…
The pollution on the surface of an insulator is asymmetric, although insulators, in general, are axisymmetric. The distortion of fields on the surface of an asymmetrically polluted axisymmetric insulator is computed in this paper. The surface charge simulation method (SCSM) has been used with cylindrical, conical and…
Pemulens(R) (BF Goodrich) are hydrophobically-modified copolymers of acrylic acid (Acrylates/C10-C30 alkyl acrylates) that could act both as primary emulsifiers for o/w emulsions and viscosity enhancing agents. The aim of this study was to assess the influence of different processing conditions (mixing equipment, spee…
The thermodynamic properties and lattice dynamics of crystals MM′P2X6 with cations in different valence states have been investigated. For Sn2P2S(Se)6 crystals with a three-dimensional lattice, the interaction between polarization and deformation plays an important role in the mechanisms of the displacive transitions…
Abstract Transient shear and extensional properties of two grades of partially crystalline biodegradable aliphatic polyesters, poly ε caprolactone (PCL), were investigated at three different temperatures. Uniaxial extensional viscosity at a constant strain rate was obtained using the Meissner apparatus. The magnitudes…
The thermoelectric transfer difference of Thermal Converters (TCs) can be evaluated in both current mode and voltage mode, using a fast-reversed dc (FRDC) source. Some types of TCs show differences in the thermoelectric transfer difference between voltage and current mode as large as some parts in 10/sup 6/. In order…
Abstract— We report the formation of an electrostatic complex between (16‐pyrimidinium crown‐4)tetranitrate (16PC4) and tetrakis‐(4‐sulfonatophenyl)porphyrin (4SP) in aqueous solution. Ground‐state complex formation results in a red shift of the 4SP visible absorption bands and a decrease in absorbance of the Soret ba…
The current transients during metastable pitting of A516–70 carbon steel in bicarbonate–chloride solutions were monitored and statistically analysed. The transition criterion from metastable to stable pits was determined. Two experimental approaches were used for this purpose: potentiostatic control and galvanic coupl…
VALMAP 2.0 is a Microsoft-Windows-based program designed to assist material scientists in accurate structural investigations. The aim of VALMAP is to calculate the sum of bond valences that a particular atom would have if it were placed at any arbitrary point in the crystal. By movement of this atom through all possib…
Synthetic nagyagite was grown from a melt as part of a search for materials with high-temperature superconductivity. Electron microprobe analyses of synthetic nagyagite and of nagyagite from the type locality Nagyág, Transylvania (now Săcărîmb, Romania) agree with data from literature. The crystal chemical formula [Pb…
A theoretical description of the mechanism and kinetics of the graphitization of diamond taking place with two sharply differing activation energies and accompanied by explosive disintegration of the graphitized diamond crystals is obtained in the approximation of a model interatomic interaction potential.
Copper/Benzocyclobutene Interconnects for Sub‐100 nm Integrated Circuit Technology: Elimination of High‐Resistivity Metallic Liners and High‐Dielectric Constant Polish Stops, Neirynck, J. M., Gutmann, R. J., Murarka, S. P.
A set of experiments on the solidification of Ga 1-x In x Sb alloys with a large variation of the sample diameter (from 1mm to 10mm), of the growth rate (from 0.7 to 7 μm/s) and of the concentration (from x=0.01 to x= 0.1) is described. The associated radial and longitudinal segregation of the In have been analysed by…
The relationship between extracellular poly(3-hydroxybutyrate) (PHB) depolymerase synthesis and the unusual properties of a succinate uptake system was investigated in Pseudomonas lemoignei. Growth on and uptake of succinate were highly pH dependent, with optima at pH 5.6. Above pH 7, growth on and uptake of succinate…
Measurements of initial sintering shrinkage of mixes of CaAl4O7 and CaAl2O4 are reported in the temperature range 1360–1420°C. The particle size chosen was -45 μm and the mix proportions were 5 : 8, 4 : 10, and 3 : 11 by weight of CaAl4O7 and CaAl2O4 . The soaking periods were from 10 to 180 min. The time dependence o…
In this paper, we present the results of our calculations of the phonon spectrum for the In4Se3 crystal in the central two-body interaction model without taking into account long-range forces. The model studied here contains five unknown parameters, which were determined from the experimental values of the elastic mod…
Unidirectional liquid crystal (LC) alignment produced by polarized UV exposure was examined using polyimides (PIs) synthesized using different diamines. The dichroic ratio of the resulting LC cells suggests that the UV photosensitivity is primarily controlled by the chemical structures of the PIs used. The UV absorpti…