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。
Ongoing reductions in dielectric thickness for metallized AC capacitors, has resulted in a shift away from pure aluminium coatings for capacitor materials to be used in higher voltage applications. Metallized electrodes such as zinc with silver prenucleation, zinc/aluminium composites and aluminium bilayers are now re…
Abstract Runaway behaviour of an exothermic reaction in a semibatch reactor was studied experimentally on the example of hydrolysis of acetic anhydride catalyzed by sulphuric acid, in a 700 cm 3 thinwalled stainless steel stirred reactor, 10.2 cm in diameter and 13.0 cm high. The reactor was partially immersed, to a d…
The chemistry of pre-calcination and reduction roast processes with H2 + H2O gaseous mixture was analyzed, in order to find the best nickel and cobalt recoveries after selective roasting of nickelferrous laterites A thermodynamic analysis of the pre-reduction of garnieritic ores aiming NiO and CoO reduction showed tha…
The critical part of the transition metal joint between type 304 stainless steel and 2.25Cr-1Mo steel, with an immediate piece of Alloy 800, is the Alloy 800/2.25Cr-1Mo steel joint welded with Inconel 182. The performance of this trimetallic transition joint was studied by accelerated thermal cycling of the Alloy 800/…
Intergranular stress corrosion cracking (IGSCC) of metallic alloys including iron is strongly influenced by the presence of grain boundary impurities such as phosphorus. In this study to determine how phosphorus affects the corrosion of iron, electrochemical polarization methods were used in conjunction with surface a…
The effects of regional hyperthermia (42 degrees C for 70 min) on the antitumor activity of melphalan were examined in athymic mice bearing melphalan-resistant human rhabdomyosarcoma (TE-671 MR) xenografts growing in the right hind limb, and results were compared with similar studies of melphalan-sensitive (TE-671) pa…
Reaction of the platinum(II) complex of the pendent-arm macrocycle 6,13-diammonio-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane with chlorine in aqueous solution does not lead simply to oxidation of the platinum(II) complex to a trans-dichloroplatinum(IV) complex. Instead, complete chlorination of the pendent primar…
<div class="htmlview paragraph">Ammonia is one of the most useful compounds that react with NOx selectively on a catalyst, such as V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>, under oxygen containing exhaust gas. However ammonia cannot be stored because of its toxicity for the…
Abstract The resonance Raman and far‐infrared spectra of n ‐Bu 4 NI 3 show the coexistence of symmetrical ( C 2ν ) and unsymmetrical ( C s ) I 3 − species, which are clearly distinguished by varying the wavelength of the excitation line. Only a slight deviation from D ∞ h symmetry has been deduced for the Br 3 − ions…
K 2 Se 5 has been prepared by crystallization from a potassium polyselenide solution in DMF. In a similar way [Na(15-crown-5)] 2 Se 5 can be prepared by crystallization from a sodium polyselenide solution in DMF in the presence of 15-crown-5. Both compounds were characterized by FIR spectroscopy as well as by X-ray st…
The distribution of polarization in ferroelectric ceramic samples of Ca-modified lead titanate, for different Ca contents, has been determined from the measurement, as a function of frequency and for different poling fields, of pyroelectric currents, generated by sinusoidal thermal waves of low frequency. Inferred fro…
A new in situ wall conditioning method by reactive gas fuelling has been investigated in TEXTOR; this method is applicable during plasma discharges of the operating machine. For these experiments, trimethylboron, B(CH 3 ) 3 , was fed into the torus instead of hydrogen. While the hydrogen of the trimethylboron molecule…
Abstract Ca(BrO 3 ) 2 und Ca(IO) 3 sowie deren Hydrate wurden mit Hilfe thermoanalytischer, röntgenographischer und IR‐ sowie Raman‐ spektroskopischer Methoden untersucht. Charakterisiert wurden: Ca(IO 3 ) 2 · 6 H 2 O oF 216, die isotypen Monohydrate mP 48 Ca(BrO 3 ) 2 νH 2 O und Ca(IO 3 ) 2 I (Lautarit) mP 36, Ca(IO…
An extension of the classical thermal Stefan problem by incorporating the dependence of the phase transition temperature on pressure generated by the flow of the liquid phase due to a density change in the transition process is presented. Two prototypical planar situations are considered. The first is the onset of fre…
Optical data storage, transmission, and handling will require a means to carry out all‐optical switching of information if semiconductor‐based electronics are not to become a serious bottle‐neck for the technology. The various materials which aree being examined wiith a view of this application are reviewed are some r…
Abstract The mechanisms of aromatic nucleophilic substitutions are briefly reviewed with emphasis on those which have been used for the synthesis of aromatic polyethers and aromatic polythioethers, i.e. the S N Ar, the S RN 1, and a variant of S RN 1 (the S RN 1′) mechanisms. The synthesis of poly(ether ketone)s by th…
<div class="htmlview paragraph">Strain rate sensitivity is an important material property in the formability of sheet metal. In this study, strain rate sensitivity is evaluated for several different grades of steel. Strain rate sensitivity varies from 0.01 to 0.022 for the steels tested. It was found that formab…
The nonlinear optical properties of a perfectly polarized KIO 3 single crystal were investigated. The principal refractive indices and nonlinear optical coefficients have been measured. The results are as follows: n 1 = 1.6967, n 2 = 1.8329, n 3 = 1.8358 for 0.5893 μm; d 31 = 1.2| d 31 (LiIO 3 )|, d 32 = 1.8| d 31 (Li…
The Raman spectrum of a ${\mathrm{KNO}}_{3}$ single crystal was measured at both room and liquid-nitrogen temperatures. Lattice-dynamical calculations, based on the rigid-ion approximation and empirical potentials, were performed. The possibility of a phase transition at 217 K was investigated by measuring the tempera…
Single-beam overwrite performance of 5.25 inch diam. In 3 SbTe 2 phase-change optical disks was examined at a constant angular velocity (CAV) of 1800rpm (υ=5-11 m/s). We obtained overwrite with a new erase mode and achieved a large erasability of more than 35 dB and a carrier-to-noise ratio ( C / N ) of more than 50 d…