Materials Literature
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This paper presents the results of the calculation the thermal field distribution on the surface of processed partunder the influence of a moving heat source (of the low-temperature plasma).
Monocrystalline CdTe/MgCdTe double-heterostructures (DHs) grown on lattice-matched InSb substrate have achieved remarkable carrier-lifetimes up to 3.6 μs recently. In this work, external luminescence quantum efficiency (ηext) of n-type CdTe/MgCdTe DHs is determined using Photoluminescence Quantum Efficiency (PLQE) mea…
Being biodegradable and biocompatible natural polymer, poly-β-hydroxybutyrate (PHB) drew the attention of scientists to substitute synthetic plastics in our daily lives. However, its industrial production is hampered by its high cost. In this study, an extensive screening program was done to isolate bacteria with high…
A high voltage bushing electrode/lead assembly for a 420 kV power transformer was built considering the same test program as applied previously with mineral oil. The lead exit combined high-quality solid insulation components impregnated with the natural ester Envirotemp™ FR3™ fluid together in a compact geometric tur…
The synthesis, structure, optical and redox properties, and electronic structure of tetrakis(pentafluorophenyl)tetrathiaisophlorin dioxide (12) are reported. Oxidation of tetrakis(pentafluorophenyl)tetrathiaisophlorin (11) with dimethyldioxirane afforded the oxidized product, which was the tetrathiaisophlorin with two…
PURPOSE: The determination of attenuation compared to lead for lead-free and lead-reduced protective clothing depends strongly on the different methods of measurement. The standards EN 61331-1 (2002), DIN 6857-1 und IEC 61331-1 (2014) are now available for the testing of protective clothing. These standards define met…
Akrilik lifleri yaygin olarak kullanilan liflerden birisi olup, dusuk isil iletkenlik, iyi sekil koruma ve dayaniklilik ozellikleri sebebiyle orme giysi endustrisinde buyuk bir uygulama alanina sahiptir. Farkli liflerle birlikte karisim halinde kullanilabilen akrilik lifleri icin, burusmazlik, iyi nem absorbsiyonu ve…
Transients and repetitive transients affect cable insulation life in a way, which is not easily predictable at the design stage. Therefore, cable system life can be shorter than that expected especially when loads controlled by power electronics are fed, or when HVDC systems are integrated in AC networks. This paper h…
The phase composition and the characteristics of vacancy voids in cold-worked steel 07C–16Cr–19Ni–2Mo–2Mn–Ti–Si–V–P–B (CW EK164-ID) after neutron irradiation at damaging doses of 36–94 dpa and temperatures of 440–600°C are investigated. In the entire range of damaging doses and temperatures, voids with different sizes…
Understanding how the defects interact with each other and affect the properties of ZnO:Al films is very important for improving their performance as a transparent conductive oxide (TCO). In the present work, we studied the effects of hydrogen annealing on the structural, optical and electrical properties of ZnO:Al fi…
Abstract Chitin (β-(1-4)-poly-N-acetyl-D-glucosamine) is widely distributed in nature. A method for the preparation of chitin nanofibers (CNFs) is reported. CNFs are considered to have several potential applications because they have useful properties such as high specific surface area and porosity. More recently, ben…
Pure Fe was severely deformed by a combination of shaped cold rolling and cold drawing. X-ray diffraction profiles analysis was applied in accordance with the Williamson-Hall (WH) and modified Williamson-Hall (MWH) methods to identify crystallite sizes of the deformed specimens. It was found that some differences exis…
Abstract We present a double‐substrate fiber probe for the improvement of SERS detection sensitivity by the laser‐induced deposition of silver nanoparticles (AgNPs) on the taper surface of the optical fiber and the addition of highly active AgNPs (prepared by an autoclave reaction method) in the analyte solution. The…
Here we demonstrate a method to tune a ferroelectric imprint, which is stable in time, based on the coupling between the non-switchable polarization of ZnO and switchable polarization of PbZrxTi(1−x)O3. SrRuO3/PbZrxTi(1−x)O3/ZnO/SrRuO3 heterostructures were grown with different ZnO thicknesses. It is shown that the co…
Converter transformer is the key equipment of high voltage direct current transmission system and the insulating performance of transformer oil is closely related to transmission reliability. The insulating performance of transformer oil is quite sensitive to nonmetallic and metallic particles originating from the pro…
This paper reports the preparation of organic montmorillonite (OMMT) modified by octadecylamine and polypropylene/montmorillonite (PP/MMT) composites produced by the method of melt compounding. The effect of MMT modification degree on the crystallization behaviour of PP was emphasized by X-ray diffraction (XRD), polar…
A mid infrared free electron laser (MIR-FEL) (5-20 Πm) facility (KU-FEL: Kyoto University Free Electron Laser) has been constructed for contributing to researches on energy science at Institute of Advanced Energy (IAE), Kyoto University. The firstlaser power saturation at 13.2 Πm was achieved in May 2008. Up to now 12…
Tree-like-trees are observed with electron beam irradiated XLPE cable insulation under AC voltages. Charge accumulation studies indicate that the level of charge deposited by +/- DC corona charging is almost same. However, the amount of accumulated charge increases with increase in level of irradiation of electron bea…
Current techniques used for monitoring the levels of contamination on high voltage insulators, such as leakage current and infrared, are not effective in dry conditions since they require the surface of the insulator to be wetted by fog, rain or snow. If a buildup of contamination occurs during a prolonged dry period…
A novel, accelerated aging test method was used to characterize the long-term stability of commercial black-pigmented polypropylene (PP) model materials for solar thermal absorbers at elevated temperatures. The PP model materials investigated, PP-B1 and PP-B2, are based on carbon black pigmented PP block copolymer gra…