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 work is devoted to synthesis of Mn-doped YAlO3(YAP) ceramics by common solid-state reaction and their characterization by photoluminescence and thermoluminescence techniques. An impact of the synthesis conditions on the thermoluminescence (TL) efficiency of the ceramics is analyzed from the point of view of possib…
This paper presents partial discharge (PD) activity in line commutated high voltage direct current (HVDC) converter. Poorly impregnated kraft paper sheet was designed to simulate the field cavity defect and generate PD signals, which were detected by a Rogowski coil sensor in experiments. The dependence of partial dis…
A method to improve emission homogeneity of pressed palladium-barium cathodes applied in magnetrons with self-heating initiation is proposed. The initial palladium powder is annealed at 950°C for 60 min and then calcined in vacuum under pressure of residual gases P ≤ 1 × 10 −4 Pa. It is demonstrated that cathodes prod…
The accelerated thermal aging of CSPE(chloro sulfonate polyethylene) of test cables were carried out for the period equal to 20, 40, 60, 80 and 100 years in air at 100, 110 and 120□, respectively. The CSPE cables (TAIHAN electric wire Co. Ltd) were used as starting materials. Condition monitoring methods of the accele…
The Monte Carlo method, which is a powerful tool for finding equilibrium states (and/or their corresponding characteristics) in systems of a different nature in many cases allows one to also describe the course of kinetic processes. This work presents the Monte Carlo modeling of magnetic relaxation and dynamics of ind…
PMMA/TiO2nanocomposite films in free standing form were prepared at different amount of TiO2nanoparticles by using sonication method. The PMMA powder and TiO2nanopowder were dissolved into the toluene solution and sonicated for 1 h to confirm the homogeneity of the mixture. The FESEM micrographs reveal that PMMA/TiO2n…
Epoxy used as insulating material in electronic and electrical devices plays an important role in system reliability. Addition of nanoparticles into epoxy can improve the insulating properties compared with undoped material. However, due to the change of the material structure, trap characteristics and charge behavior…
Switching impulse breakdown values, negative and positive polarities, were measured for long oil gaps of natural ester fluid and mineral oil. A switching surge wave shape of 250×2500 μs was used for gaps of 50-150 mm between a high voltage bushing shield and a simulated tank wall (an electrode arrangement used to obta…
It has been shown that the kinetics of reactions involving mobile intrinsic defects in the crystal is described by the exponential dependence in many cases. Based on this dependence and the fact that random-walk diffusion occurs in the cases under consideration, the distribution of diffusion paths traveled by mobile d…
This paper presents the results of simulation of an interior permanent magnet synchronous machine (IPMSM) modeled using different magnetic characteristics. In each case the same steel is used and comparisons are made between manufacturer's data and two sets of Epstein test data. The two Epstein data tests are for mate…
XLPE-silicon rubber interface is the weakest part of cable system. Dielectric breakdown called tracking failure of the interface often occurs. The failure endangers the reliability of power delivery. Massive application of power electronics easily causes over voltage or high electric field of impulse in power system,…
The article describes the research work on obtaining high-diathermic ceramics from industrial powders of aluminum nitride and yttrium oxide used as a baking additive. The optimal content of yttrium oxide was defined. The properties of the obtained ceramics and its structure are studied by XRD, XRF methods and SEM meth…
The variations of the charge state and the thicknesses of the polymer polyethylene interlayer in piezoceramics with different structures due to their electric treatment have been investigated. It is shown that the differences of the strength properties of the piezocompositions with various particle dimensions dependen…
The results of an experimental study of the pyrope (Mg 3 Al 2 Si 3 O 12 )-jadeite (NaAlSi 2 O 6 ) system at P = 7.0 and 8.5 GPa and T = 1300–1800°C are summarized in this paper. The main phases that were obtained in the experiments are garnet, pyroxene, kyanite (in some cases corundum), and quenched melt. Garnets are…
A novel active frequency selective surface (FSS) based on complementary structures is proposed in this paper. The structure is made up of square loop apertures and crossed dipoles on either side of a thin substrate. Several PIN diodes are loaded between crossed dipoles to provide different transmission states. The cro…
The availability of high-power spallation neutron sources, along with advances in the development of coupled moderators and neutron polarizers, has made it possible to use polarized neutrons on time-of-flight diffractometers forin situstudies of phenomena contributing to field-induced magnetization of a material. Diff…
The ultra-high frequency (UHF) electromagnetic waves excited by PD (Partial Discharge) in GIS(Gas-Insulated Switchgear) are attenuated as they are affected by the GIS structure. A sensor positioned over the resin sprue in mental flange of the insulator can receive UHF signals radiated from within the GIS, which may be…
Penambahan fly ash dan penggunaan steam curing membuat produksi beton lebih ekonomis, baik dari segi waktu maupun biaya. Selain ekonomis, kualitas beton juga harus dikontrol, salah satunya adalah kuat tekan. Di Indonesia prediksi kuat tekan beton diatur PBI 1971. Peraturan ini hanya dapat digunakan untuk prediksi keku…
Using a double templating method by electroless deposition within a templating organic porous mold, we fabricate a monolayer of hexagonal-close-packed metallic nanoshells, each with a small opening. Light transmission spectra of the metallic nanoshell arrays are measured, which show transmission resonances at specific…
Il rapporto che segue è relativo all’attività svolta dall’ENEA nell’ambito dell’Obiettivo A, con riferimento all’ultimo capoverso:\n“Nel campo dell’accumulo misto, la disponibilità di un accumulo misto a 48V e dei ciclatori del laboratorio prova batterie, permetterà l’esecuzione (secondo anno) di prove vita con e senz…