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。
It has been stated that reliable qualitative identification of isocyanurate rings directly in urethane-isocyanurate elastomers (EUI) can not be realized using ATR method. Such identification becomes possible only on the basis of the analysis of EUI hydrolysis in acid medium products. It was done using following method…
Structural characteristics of non-stoichiometric copper selenides were studied by the elastic neutron and X-ray scattering techniques. Rietveld analysis was used to refine the structure of the high-temperature β-phase of the Cu 1.75 Se, Cu 1.78 Se, and Cu 1.83 Se samples. The homogeneity ranges of the cubic phase were…
A thermal treatment at 900°C (under nitrogen) of a milled mixture MnO-Fe 2 O 3 yields MnFe 2 O 4 mainly as the product of the reaction between Mn 3 O 4 (produced by ball milling) and Fe 2 O 3 . Under the same experimental conditions but starting from an unmilled MnO- Fe 2 O 3 mixture, the formation of MnFe 2 O 4 is on…
Flurbiprofen is an analgesic and antiinflammatory drug with poor water solubility and compressibility. Flurbiprofen conventional drug crystals were converted into spherical crystal agglomerates via the spherical crystallization technique using acetone-water-hexane solvent system. The various parameters optimized were…
Preliminary measurements of the thermal conductivity of pure carbon dioxide in the temperature range 1.5–35 K are reported. The first data below 25 K have been obtained. The thermal conductivity reaches very high values, about 700 W/(m⋅K), which is unusual for simple molecular crystals. A straightforward analysis of t…
Surface incorporation of a liming agent in combination with compost or biosolids is a proven way to revegetate acidic minespoils, but little is known about the effect of the surface amendments on subsoil chemistry. We conducted a greenhouse column experiment to investigate how different surface amendments affected pla…
The magnetic and transport properties of La 1− x Mn 1+ x O 3 manganites with excess manganese are studied. It is shown that magnetic and charge ordering heavily depends on the superstoichiometric manganese content, magnetic field, and pressure. The magnetoresistive effect (MRE) is enhanced as the manganese concentrati…
The Organization for Economic Cooperation and Development (OECD) Main Steam Line Break (MSLB) Benchmark was defined to validate the thermal-hydraulic system codes coupled with three-dimensional (3-D) neutron kinetic codes. The reference problem is an MSLB in a pressurized water reactor at end of cycle. The analyses we…
This study of the thermal decomposition kinetics of various average diameter nano-particles of calcium carbonate by means of TG-DTA ( thermogravimetry and differential thermal analysis) showed that the thermal decomposition kinetic mechanisms of the same crystal type of calcium carbonate samples do not vary with decre…
Studies into cation release in manured soils are very limited and poorly documented. The present investigation was therefore aimed at comparing the influence of manure application on cation [calcium (Ca), magnesium (Mg) and potassium (K)] mineralization in four different soils. Four sources of livestock manure: chicke…
Fuchsin basic (FB) and fuchsin acid (FA) were tested as new corrosion inhibitors for copper in 0.001, 0.005, and 0.01 M hydrochloric acid (HCl) solutions. Benzotriazole (BTA) was also tested for comparative purposes. Twelve FB, FA, and BTA concentrations, from 1 × 10–5 M to 1 × 10–1 M, were added to the acid solution…
By using a thin slab casting simulator combined with the hot deformation simulator WUMSI, laboratory tests were performed to investigate the microstructure processes and mechanical properties in the process of thin slab direct rolling (TSDR). The paper shows the possibilities to improve the initial as‐cast state of mi…
The use of in situ Fourier Transform Infrared (FTIR) to follow PU reaction kinetics has been studied using a heated probe matching the PU material temperature. The results obtained show that, although not giving access to concentration of formed chemical bonds, the technique is a unique tool to assess subtle differenc…
Charge transfer near the threshold of polymer film transition (induced by a low uniaxial pressure) to the high-conductivity state is studied in an attempt to tackle the question of how the energy band structure of a wide-gap organic insulator varies near this threshold. The I-V characteristics of poly(diphenylenephtha…
An alternative method for the hardening of steel parts has been developed as a means of providing steel products with superior mechanical properties through development of high residual compressive stresses on the part surface, and involves the application of intensive quenching during heat treatment. This processing…
In this work, we describe a process for the fabrication of suspended porous silicon micro-hotplates for application in thermal sensors. Membrane release is achieved by means of lateral isotropic etching of the bulk silicon substrate, the etching being highly selective to the porous silicon and the photoresist used to…
Adsorption isotherms of He-4 on Na and on Rb measured with a quartz crystal microbalance are presented. The isotherms on Na indicate complete wetting at coexistence and the growth of a thin film at low relative pressures, which may become superfluid at lower temperatures. The results on Rb indicate clear prewetting ju…
One of the most fundamental phenomena in optics is refraction. When a beam of light crosses the interface between two different materials, its path is altered depending on the difference in the refractive indices of the materials. The greater the difference, the greater the refraction of the beam. For all known natura…
Abstract The ignition, flaming and smoldering combustion of low‐density polyimide foam have been studied using a cone calorimeter. Low‐density polyimide foam exhibits a high ignition resistance. The minimum heat flux for the ignition of flaming combustion ranges from 48 to 54 kW/m 2 . This minimum heat flux also indic…
Abstract X-ray single crystal, X-ray powder and specific heat investigations were carried out on alumosilicate NaNO 3 -sodalite between 290 K and 1100 K. Single crystal structure determinations at 295 K, 505 K and 720 K reveal the sodalite structure in its partially collapsed form in space group P 4̅3 n whereas at 935…