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。
The development of liquid metal breeder blankets for fusion reactors has been performed in the Forschungszentrum Karlsruhe as a part of the European fusion blanket development program with the aim to select the two most promising concepts in 1995 for further development. In this report are described the designs of sel…
The borate Ba 2 Ca(B03) 2 has been prepared and its structure determined by single crystal X-ray diffraction methods. It crystallizes in the monoclinic space group C2/m (#12) with a = 9.362(2), b = 5.432(2), c = 6.635(2) , = 119.38(1), and V = 302.6(1) A 3 . The structure was determined from 762 unique reflections and…
The volume resistivity and electromagnetic shielding properties of “Woodceramics” made of porous carbon material were investigated for the purpose of developing a new shielding material.The measured values of volume resistivity depended on the burning temperature, and changed from 1010Ω·cm to 10-2Ω·cm with increasing…
HVDC cables play an important role in a growing number of HVDC links. For almost all of these cables, mass impregnated paper is used as electrical insulation. The electrical conductivity of this insulation is given by a commonly used empirical formula. This formula takes into account the temperature and stress depende…
A stepwise peroxide initiated degradation of a PRO-FAX reactor grade polypropylene by reactive extrusion was compared with a single step degradation process. Measured properties of the polypropylene and the degraded products included shear and intrinsic viscosity, melt flow index, melting and crystallization temperatu…
Poly(ethylenc terephthalate) (PET) fibres having a wide range of structures and morphologies were prepared by heat-setting commercial PET yarn at fixed temperatures between 100 and 255°C under two conditions, i.e. while the yarn was free to relax and when it was held taut at constant length. The structural and morphol…
As a probe of physical chemical properties of the intracellular environment, we measured 39K NMR transverse relaxation rates in concentrated cell slurries of Escherichia coli K-12 grown in minimal medium over a range of osmolarities (from 0.1 to 1.0 OsM) and after plasmolysis. The 39K transverse relaxation at a resona…
Reaction of octahydridooctasesquisiloxane with Co2(CO)8 in hexane affords the complex [Si8O12H6]{Co(CO)4}2 which on pyrolysis at 300 °C in vacuo gives nanoparticulate Co2C encapsulated in an amorphous siliceous matrix; the magnetic coercivity of this material is 3.5 kOe.
Ge4S9(C3H7)2NH2(C3H7)NH2(C2H5) consists of chains of corner-linked adamantane units with a composition of [Ge4S9]2– which are separated by two dipropylammonium (DPA) cations; the first reported chain-like structure of [Ge4S9]2–.
Among the tens of thousands of species of protists recognized today, a goodly number are known as 'ambiregnal" because of their past treatment both as algae and as protozoa, which caused their names to fall under the jurisdiction of both
In the ageing of insulating materials by partial discharges, physical, chemical and electrical factors enter together into play. The paper aims to provide a general overview on the subject, especially for the physical and chemical phenomena, using information obtained from studies carried out with air corona discharge…
The structure of benzene solutions of Ga[GaCl4] and Ga[Ga2Cl7] has been investigated by 13C and 71Ga NMR, Raman spectroscopy and liquid X-ray scattering (LXS). Assignments of the vibrational spectra are based on a reinvestigation of the liquid Ga–GaCl3 system. The results for the Ga[GaCl4]–C6H6 system are in agreement…
This paper reviews recent work on the effect of biaxial stress on magnetic properties obtained from hysteresis loops. Both experimental and theoretical work are discussed. Biaxial stress measurements were performed on SAE-4130 and mild steel cruciform specimens. The theoretical model, applied to polycrystalline steels…
For the near to generator short-circuit analysis, it is well known that a rigorous calculation procedure requires the use of complex dynamic models of power system components. In most practical cases, however, it is sufficient to adopt simplified and standard based calculation methods. For these cases the paper sugges…
Large mirrors are used to concentrate sunlight for renewable power generation. The reflector materials that are used must be inexpensive and maintain high specular reflectance for extended lifetimes in severe outdoor environments. Polymer reflectors are lighter than glass mirrors, offer greater system-design flexibili…
The powder technology characteristics of 3 kinds of Paracetamol powders from different manufacturer were investigated. Their crystal lattices, crystal shapes and the shape coefficients were measured. The compression behaviors were shown that the needle-shaped crystals have greater extent of capping and lamination than…
A new method is presented to interpret steady-state flow experiments for relative permeability and capillary pressure functions eliminating errors caused by the capillary end-effect. This is achieved by retaining the capillary term in the equations that are used to interpret the flow data.
The design of cryogenic, scanning Fabry-Perot interferometers for the Long-Wavelength Spectrometer on the ESA Infrared Space Observatory is presented. The interferometers were designed to provide a spectral resolving power of 10(4) over the wavelength range 45-180 µm, with the highest possible transmission efficiency…
Electrically conducting polymers can be prepared by various routes which will be decisive for the specific properties, e.g. conductivity, solubility, and crystallinity. This article covers the major routes for the preparation of important electrically conducting isopolymers with respect to their properties. Preparatio…
Thermodynamic calculations show, in accordance with experimental investigations, that transition metals in an H2–SiCl4 atmosphere in the temperature range 600–1200 K will react to form metal silicides. With rising temperature, stoichiometry will change in the direction of silicides with a higher silicon content. The s…