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The Role of Key Impurity Elements on the Performance of Aluminium Electrolysis - Current Efficiency and Metal Quality
(Materials Science and Technology, 2015 , Master Thesis)
Impurities such as phosphorus and silicon mainly enter the aluminium electrolysis process with alumina. These impurities dissolve in the electrolyte and affect the performance of the electrolysis, the emissions from the ...
Surface characterization and luminescence properties of AlN doped with RE elements (Sm, Ho, Gd, Tm)
(Materials Science and Technology, 2015 , Master Thesis)
Rare‐ earth (RE)‐doped III‐nitride broad band‐gap semiconductors have attracted enormous interest as a foundation for optoelectronics devices, which combine the unique luminescence feature of Rare‐earth ions with the ...
Heat Absorbers based on Recycled Polyethylene and Paraffin Wax for Energy Storage
(Materials Science and Technology, 2016 , Master Thesis)
The building sector is one of the main sectors in Qatar; however, it consumes a huge portion of primary energy sources. Today, there is a worldwide trend to utilize renewable sources of energy to cover buildings’ energetic ...
MOLECULAR LEVEL UNDERSTANDING OF NANOCLAY DISPERSION IN POLYSULFONE, POLYIMIDE, AND THEIR BLEND COMPOSITES
(Materials Science and Technology, 2016 , Master Thesis)
Polymer composites based on polysulfone (PSF) and polyimide (PI) are used as membranes for gas separation and water purification applications. However, structure composition related issues limit the performance of the used ...
NEW FLEXIBLE POLYVINYLIDENE FLUORIDE NANOCOMPOSITES FOR FUTURE APPLICATIONS
(Materials Science & Technology, 2017 , Master Thesis)
In this work, we report novel flexible polyvinylidene fluoride (PVDF) hybrid
pressure sensors with good mechanical properties. Hybrid combinations of reduced graphene oxide (rGO) with different nano metal oxides -titanium ...
SYNTHESIS AND PROPERTIES OF NANOCRYSTALLINE BI-TE BASED THERMOELECTRIC MATERIALS FOR ENERGY APPLICATION
(Materials Science and Technology, 2016 , Master Thesis)
Thermoelectric phenomenon is the science associated with converting thermal energy into electricity based on the Seebeck effect. Bismuth telluride Bi2Te3 is currently considered to be the state-of-the art thermoelectric ...
NITROGEN AND SULFUR– DOPED CARBON NANOFIBER MIXED OXIDES COMPOSITES FOR SUPERCAPACITOR APPLICATIONS
(Materials Science and Technology, 2016 , Master Thesis)
Energy storage devices including supercapacitor are among the rapidly growing field of alternatives for rechargeable batteries due to its high energy density and long life cyclability performance. Electrospinning is a ...
Physico-Mechanical Properties of New Electrospun Polyvinylidene Fluoride Nanocomposites
(Materials Science and Technology, 2015 , Master Thesis)
This study aimed to prepare and characterize poly(vinylidene fluoride) (PVDF) nanofibres with the following additives: graphene oxide (GO), cellulose, and silver nanoparticles (Ag-NPs). Two types of solvents were used to ...
Er Doped III-Nitride Semiconductors
(Material Science and Technology, 2017 , Master Thesis)
Erbium ions (Er3+) doped in a solid material enables the intra 4f shell transitions from its first excited state (4I13/2) to the ground state (4I15/2). The intra-4f shell transition at 1540 nm is of exceptional interest ...
Properties and thermal stabilization of Nanocrystalline copper via solute additions of niobium
(Material Science and Technology, 2017 , Master Thesis)
Nanocrystalline materials, those with grain size <100 nm, were found to have superior mechanical properties compared to their coarse-grained (CG) counterparts. However, these materials are not thermally stable because of ...