Materials Literature
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The use of thermoelectric cooler (TEC) as enhanced air cooling technique for electronic generating devices has been of increasing interest. In this paper, experimental and computational studies of TEC enhanced air cooling limits are conducted. The experimental work was first conducted as a baseline study. The setup co…
Effects of vicinal growth in ErBa 2 Cu 3 0 7−δ (ErBCO) with one-dimensional nanorods are discussed from their microstructures. BaNb 2 O 6 doped ErBCO films were grown on vicinal substrates with tilted angles of 0°, 4° and 8° by a pulsed laser technique. Surface step structure appeared distinctly with increasing vicina…
An anti-reflection coating (ARC) with sub-micrometer size of structure has brought significant advantage in solar cell efficiency. Owing to the diffraction and light trapping effect caused by a sub-wavelength size of structure, the reduced reflectance covering a wide-wavelength can be expected at a surface of the phot…
We report results from in situ real-time spectroscopic ellipsometry (RT-SE) investigations into the sputter deposition and subsequent annealing behavior of permittivity-engineered transparent conductive oxide (TCO) films. RT-SE reveals information about the growth dynamics and evolution of the films' electro-optical p…
An on-site calibration system for three-phase isolation current transformers is described. It is based on precise power comparators which are shipped to the customer. Measurements can be done at test currents up to 120 A. The measurement uncertainties of the self-calibrating measurement system are in the order of 0.00…
This paper reports ramp test results on aged and spare bars. The measurements were carried out up to a maximum voltage of 21 kV in laboratory. The laboratory aged bars were compared to the spare bars with respect to their test results. Both a linear model and a non-linear model were used to reproduce the experimental…
Magnetoresonance features of strontium-doped lanthanum manganites-perovskites in microwave band were investigated. One wide resonance peak has been observed for sintered bulk specimen. For thin-films specimens two resonance peaks has been detected. This fact shows that in thin-film specimens a few magnetic subsystems…
The paper describes results of investigation on sputtered NiFe Films to determine the sputter deposition condition that could produce magnetic field sensors with the desired magnetic properties. The magnetic materials used in such devices should have a low coercive force, a low anisotropy field and a low magnetization…
The intercalation of CuCl2 salts into active carbon and its activity as catalyst on dehydration of n-amylalcohol has been investigated. In this research, the intercalation was conducted by reacting CuCl2 powder with active carbon and Cl2 gas at 3 atm, temperature 575 °C, at various heating time. This process was then…
The ZnO:Al films were prepared using a two-step process through the control of oxygen pressure by DC-pulsed magnetron sputtering. The seed layers were prepared with various Ar to oxygen pressure, and the bulk layers were deposited under pure Ar. At the seed-layer condition of Ar/O2= 24/1 (Ar rich), the seed layer show…
The piezoelectric fiber composite actuators are new kind of piezoelectric actuators which have high mechanical performance and flexibility. In order to raise the induced strain of piezoelectric fiber composite actuators, two piezoelectric unit's construction equations about longitudinal length extension vibration mode…
The aim of this paper is to highlight the determining factor of some normal stereochemical nanostructures, especially the mmmr and mmmmrx, termini of isotactic sequence, on the ability of PVC, hydrogenated PVC (as a precursor of PE) and PP to accumulate, release and transport space charges. The correlations found for…
The residual lifetime of primary and secondary insulation materials is a critical parameter for many electrical machines, especially when in service. The analysis of epoxy impregnated materials with conventional techniques is a particularly difficult one, as this often requires removal and repair of at least part of t…
Carbon nanotube transistors are shown to have large performance variation due to their diameter variation, which is not acceptable to VLSI technology. We demonstrate that by proper scaling we can reach >2 mA/μm on-state current in 90% of our nanotube devices. More importantly, we demonstrate proper scaling can reduce…
Several 115 kV nonceramic insulators from the same manufacturer having different leakage distances and profiles were evaluated in a fog chamber. The material of the housing was the same for all the insulators. Repetitive cycles of dry, clean fog, and salt fog were applied to the insulators over a period of 1400 h of t…
In the present, most of the transparent conductive films have high transmission in visible, while they have low transmission in infrared waveband. In this paper, the infrared transparent conductive films of CuxAlyOzwere prepared by using radio-frequency (R.F.) magnetron sputtering deposition. Influences of sputtering…
Here, we demonstrate incorporation of carbon nanotubes (CNTs) in the active layer of donor-acceptor based solar cells and thereby significantly enhanced device performance. In this work, bulk heterojunction solar cells were fabricated with P3HT and PCBM incorporating chemically modified CNTs. Enhanced device performan…
An atomistic scheme is used to study the dependence of nanodots and ultra-thin films made of the lead-free BiFeO3(BFO) multiferroic material on electrical boundary conditions. The ground-state patterns of the electrical dipoles, oxygen octahedral tiltings and magnetic dipoles are found to dramatically depend on such e…
With the development of the world economy, the demand for clean energy, especially high purity hydrogen, is increasing rapidly. In the chlor-alkali industry there are much byproduct hydrogen. In this study, a new process for the preparation of high purity hydrogen has been developed by purifying byproduct hydrogen fro…
Abstract Bei der Umwandlung des Sonnenlichts in elektrische Energie spielen Solarzellen eine Schlüsselrolle. Dabei bieten neuartige Konzepte auf der Grundlage organischer Halbleiter viele Vorteile gegenüber ihren anorganischen Verwandten auf Siliziumbasis, die auf Dächern und in Taschenrechnern verbreitet sind. Noch a…