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Low-density polyethylene (LDPE) nanocomposites containing oibPOSS were prepared using ball-milling as a fabrication technique. POSS is basically molecular SiO2. Here it was used up to 5 wt%. At low content, it was found to disperse well into the matrix yet, as the content increases, it was observed to form polycrystals. In general, neat LDPE properties benefit from the presence of the nanofiller....
Low-density Polyethylene (LDPE) was modified by using simultaneously 2 additives. Each additive had a specific attribute. Silicon was used. Using TEM with EELS, it was proved first that the passivated version constituted a double core consisting of Si surrounded by a nanometric layer of amorphous Silica (SiO2). Thus Si brought the possibility of an enlarged dielectric storage capacity with a barrier...
We fabricated single electron transistors (SETs) by using gold nanoparticles as their islands. With a simple method of the fabrication, characteristics of capacitively-and resistively-coupled SETs (C-SETs and R-SETs) were achieved at 77 K and room temperature.
In this report, a multi-layer functionalized graphene was mixed to UHMWPE. Composite samples with 0.05 wt%; 0.1 wt%; 0.15 wt% and 0.5 wt% of functionalized graphene have been manually mixed. The AC conductivity of these samples was then measured using Broadband Dielectric Spectroscopy (BDS) at low voltage. The measurements were conducted at room temperature, 40 °C, 60 °C and 80 °C, respectively. The...
Space charge accumulation in cross-linked polyethylene-based materials for high voltage direct current (HVDC) cable insulation is investigated. Samples molded from classical cross-linkable polyethylene pellets with and without nanoparticles are used. Curing conditions (160°C, 180°C and 200°C) and degassing are assessed in terms of morphology, cross-linking by-products and space charge accumulation...
Thermal performance of phosphor-based white light emitting diodes (LEDs) under an input current of 350 mA is investigated by finite-element simulation in which the thermal and optical interactions are considered. It is demonstrated that the temperature of the phosphor particles, regardless of phosphor placement, is always higher than the junction temperature. It is concluded that the junction temperature,...
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