Materials Literature
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Calculating the current rating of HVDC cable systems is less straightforward than for ac cables, which are always thermally limited. While the permissible current in an HVDC cable circuit may be limited by the operating temperature of the dielectric, it may also be restricted by the electric stress within the dielectr…
This study reports the fabrication and characterization of a metal-oxide-based supercapacitor with a high surface area 3D microelectrode. This microelectrode is comprised of high aspect ratio SU-8 pillars that are fabricated using backside exposure and coated with alternating Ni and Cu layers via a sequential electrod…
This review concerns the behavior of a new class of LC composites with physical networks. These composites are prepared through the addition of some low-molecular-mass compounds (gelators) containing various functional groups to liquid crystals. In the medium of liquid crystals, gelators can form gels via non-covalent…
O controle da qualidade é fundamental no processo de fabricação de peças de madeira laminada colada (MLC), e uma das formas desse controle pode ser por meio da avaliação não destrutiva do módulo de elasticidade. O objetivo deste trabalho foi comparar os valores de módulo de elasticidade das peças de MLC obtidos por me…
Abstract This letter describes photoalignment layers showing high photosensitivity at linearly polarized (LP) 313 nm light. Irradiation of LP 313 nm light followed by annealing induced a molecularly oriented structure of the photoalignment layers, which showed excellent image sticking property due to azimuthal anchori…
Since 1982 Manitoba Hydro has been making periodic electrical tests on the booms of aerial devices used by live line crews at 69 - 230 kV. In 1992 the test voltages were increased to allow use of the booms at 500 kVdc. At that time the importance of appropriate cleaning and recoating of the booms was emphasized. In 19…
Abstract We have developed a color‐reflective liquid crystal display with a wide color gamut, wide viewing angle, and motion picture capability. Control over the anisotropy of optical diffusion was achieved by optimizing the internal refractive index distribution using a novel diffusion layer, resulting in a high refl…
It is well known that the electrical stress concentration contributes to the premature degradation on dielectric behavior and hydrophobicity of silicone rubber composite insulators. In order to homogenize the electric field distributions along surface of silicone rubber insulators, the non-linear silicone rubber compo…
Despite recent advancements in material technology, oil-cellulose insulation systems in form of so called Transformerboard combined with paper and mineral oil are still one of the backbones of high voltage technology. This insulation system is widely used in the high voltage industry, especially in high voltage transf…
Partial discharge (PD) detection is one of the most important issues in order to determine the insulation condition of power transformers; however the procedures for electrical partial discharge detecting are sometimes not so beneficial for onsite and on-line measurements due to excessive interferences. Acoustic emiss…
Abstract With the purpose of studying the influence of Nd on the alloy structure and castability of ZM6, under the fixed content of Zn and Zr, this paper observes and analyzes the microstructure morphology of ZM6 alloy fracture with different Nd content by the means of uniaxial tension experiment and scanning electron…
As the main insulation applied in HVDC convertor transformer, the dielectric properties of oil-pressboard insulation system play an important role in the reliability of power system. One of the key problems related to any HVDC insulation systems is the easy formation of space charge within the bulk and at the interfac…
Alumina and alumina matrix composites typically require sintering temperature in excess of 1550°C. Utilization of aluminium phosphate bonding provides process flexibility and significantly lowers sintering temperature (500° to 1280°C). While phosphate bonded alumina (PBA) may have a lower sintering temperature, its li…
The kinetics of metal filling of ED-20 epoxy oligomer by its action on AgNO 3 in the temperature interval 50–90°C was studied.
The single sided PD measurement on power cable circuits is a common used technique for onsite PD detection and localization. Time domain reflectometry (TDR) of the measured pulses is generally implemented for locating the PD pulse origin. To get higher sensitivity in PD measurements and increased localization achievem…
Atomic rearrangements at the TiO2-terminated (001)SrTiO3 surface and growth of thin LaMnO3 films, Boikov, Yu. A., Serenkov, I. T., Sakharov, V. I., Kalabukhov, A. S., Aurino, P. P., Winkler, D., Claeson, T.
Non-woven flax fibre reinforced new and recycled polypropylene were manufacturing by an industrial process of carding, batt, needle-punching and thermo-pressing. Polypropylene fibres were mixed with flax fibres in the carding process forming a thick multi-layered mat which was used for thermo-compression process. Effe…
Soil contamination caused by ?-radiation emitter radionuclides is a serious problem worldwide. Cement- based Stabilisation/solidification (S/S) could represent an optimal choice to treat radionuclides polluted soils due to the possibility to shield the ?-radiation emitted by contaminant. In order to better planning th…
In the present work two different hydrophobic agents (i.e. a Perfluoropolyether derivative, PFPE, and a Polytetrafluoroethylene, PTFE) were used to treat the surface of a carbon cloth gas diffusion layer (GDL) . Commercially available products were used in both cases, namely Fluorolink® P56 (supplied by Solvay Solexis…
Article Fire Reaction and Mechanical Performance Analyses of Polymer Concrete Materials Modified with Micro and Nano Alumina Particles was published on June 1, 2013 in the journal Restoration of Buildings and Monuments (volume 19, issue 2-3).