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Showing 1 to 12 of 12 for “"Aluminum Oxide (Al2O3)"”.
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Validation and implementation of optical diagnostics for particle sizing in rocket motors
Aluminum oxide(Al2O3) particles of known size distribution were cast into a solid propellant which burned at temperatures less than the melting point of Al2O3. Thus, particles of known size distribution existed at the nozzle inlet and in the plume. Malvern particle sizing instruments were used to …
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The Enhancement of Convective Heat Transfer in an Aluminum Oxide Nanoaerosol
… assess the effects of suspended 112 nm diameter aluminum oxide (Al2O3) nanoparticles in air on the rate of convective heat transfer. The particle mass loading was varied over a range of flow Reynolds number. The results indicate up to a 36% increase in Nusselt number for a particle mass loading …
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Investigation Of High-k Gate Dielectrics And Metals For Mosfet Devices.
… high-k dielectric materials like Tantalum pent oxide (Ta2O5), Hafnium oxide (HfO2), Zirconium oxide (ZrO2) and Aluminum oxide (Al2O3) gate oxides. Higher dielectric constant may lead to high oxide capacitance (Cox), which affects the threshold voltage (VT) of the device. The working potential of …
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Heat Transfer Enhancement of Phase Change Materials for Thermal Energy Storage Systems
… The selected nanoparticles for this analysis are Aluminum Oxide (Al2O3), Cupric Oxide (CuO), Titanium Oxide (TiO2) and Multi-Walled Carbon Nanotubes (MWCNT). The nanoparticles displayed capabilities of increasing the specific heat capacity by up to 46.15%. The micro-structure of the nano-enhanced …
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Characterization of Optically Stimulated Luminescent Detectors In Photon & Proton Beams For Use In Anthropomorphic Phantoms
… phantom irradiations. The OSLDs used were aluminum oxide (Al2O3:C) nanoDots from Landauer, Inc. (Glenwood, Ill.) measuring 10x10x2 mm3. A square, 20(L)x20(W)x0.5(H) cm3 piece of solid water was fabricated with pockets to allow OSLDs and TLDs to be irradiated simultaneously and perpendicular …
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The adsorption of arsenic (V) by iron (Fe2O3) and aluminum (Al2O3) oxides
… areas. The adsorption of As(V) using iron and aluminum oxides has been considered as one of the most effective small-scale techniques for arsenic removal;Two types of nonporous adsorbents were used in this dissertation: iron oxide (Fe2O3) from a byproduct of the steel industry, and aluminum …
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Experimental investigation of flame propagation in long, narrow tubes
… accomplished by seeding the test section with aluminum oxide (Al2O3) particles, in order to investigate the flow structures produced by the propagating flame. It was definitively established that flames propagating in tubes do produce a flow in the unburned gases ahead of the flame front. …
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Design and Synthesis of Metal Nanostructures for Plasmon-Enhanced Catalysis
… investigated in two model reactions, carbon dioxide (CO2) hydrogenation and ammonia (NH3) synthesis.</p><p>Chapter 2 describes the development of slow-injection polyol methods to synthesize monodispersed Rh nanocubes with tunable size and resonant energy. The wide size tunability of …
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Towards sustainable machining of difficult-to-cut materials using nano-cutting fluids
… performance analysis between MWCNTs and aluminum oxide (Al2O3) nano-cutting fluids. Additionally, an integrated finite element (FE) model has been developed in order to simulate the thermal and frictional effects of the MQL-nano-fluid to study various unique cutting aspects such as …
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Microstructure Optimization to Prevent Hydrogen-Induced Cracking of API X70 Pipeline Steels in Sour Environments
… of inclusions, namely calcium sulfide (CaS) and aluminum oxide (Al2O3), were responsible for the nucleation of HIC in all examined API 5L X70 samples in sour environments. Comparing the length and quantity of the cracks in the middle and top layers of all samples, it could be concluded that the …
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Microplasma-driven, atomic layer deposition of flexible electronic and photonic nanofilms
Atomic Layer Deposition (ALD) of aluminum oxide (Al2O3), gallium oxide (Ga2O3) and Zirconium oxide (ZrO2), driven by arrays of microcavity plasmas (MALD), has been demonstrated. Microplasma has been drawn attention due to its unique characteristics such as high electron density (>1016 cm-3), low …
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Stability and bandwidth investigation of alternative structures for nanopore sensors
… sensing. Membranes with various thicknesses of Al2O3, Si3N4 and SiO2 stack con gu- rations were fabricated. The fabricated membranes were analyzed and drilled through by focused e-beam sputtering in TEM. The membranes were tested in 0.1 M and 1 M KCl solutions for IV characteristics, noise level …