Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Rare Earth Oxides"”.
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Spectroscopic studies of the diatomic rare-earth oxides
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1983.
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Spectroscopy of diatomic rare-earth oxides : YbO and EuO
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1985
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On the electrolytic nature of molten aluminum and rare earth oxides
… electrochemical operation in molten refractory oxides at temperatures above 2000 K.
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Detection of rare earth elements and rare earth oxides with hyperspectral spectroscopy
The continuously increasing demand for rare earth elements in technical components of modern technologies, brings the detection of new deposits closer into the focus of global exploration. One promising method to globally map important deposits might be remote sensing, since it has been used for a …
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The Formation of Dispersions of Rare Earth Oxides in Titanium Alloys Using Rapid Solidification Processing
Embargo set by: Seth Robbins for item 71977 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Production of High-Grade Mixed Rare Earth Oxides from Acid Mine Drainage via Solvent Extraction: Laboratory-Scale Process Development
… mine drainage (AMD) may be a promising source of rare earth elements (REEs), which are essential feedstocks for many high tech applications and defense products. AMD is a longstanding environmental challenge and is currently the primary pollutant of water in the Appalachian coal mining region. …
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Preparation, microstructure and properties of silicon carbide-dysprosia composites
… Dy$\sb2$O$\sb3$, one of the lanthanide sesquioxides (or rare-earth oxides), undergoes a displacive (monoclinic to cubic) phase transformation with volume expansion during cooling from high temperatures ($\approx$1850$\sp\circ$C). The effects of Dy$\sb2$O$\sb3$ additions on the microstructure …
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Natural and engineered surfaces for enhanced phase change heat transfer
… controversy regarding the wettability of rare earth oxides by conclusively showing that hydrophobicity is driven by hydrocarbon adsorption. The findings were leveraged to design, develop, and demonstrate a novel concepts of condensation heat transfer capable of enhancing performance of …
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A High Energy X-Ray Diffraction Investigation Of Sodium Phosphate Glasses Doped With Less Than 5 Mol% Praseodymium Oxides
<p>Rare earth phosphate glasses (REPGs) are excellent materials for high energy (10<super>3</super> - 10<super>6</super> J) / high peak power ( 10<super>12</super> - 10<super>15</super> W) lasers. Previous work of the rare earth doped sodium phosphate glasses with compositions …
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Development of Environmental Tracers for Sediments and Phosphorus.
… two most appropriate tracers for this project (rare earth oxides (REOs) and fluorescent microspheres). Published methodologies relating to these tracers were investigated. The tracers were then applied to soil boxes receiving simulated rainfall, as well as a field plot, to compare their …
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Enhanced condensation heat transfer for water and low surface tension fluids
… compared to filmwise condensation. We explored rare earth oxides (REOs) as a potential coating to induce dropwise condensation of water; specifically, we experimentally demonstrated that the mechanism for REO hydrophobicity results from adsorption of contaminants from the atmosphere. We also …
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Hydrophobicity of rare-earth oxide ceramics and their application in promoting sustained drop-wise condensation
… of ceramics comprising the lanthanide series rare-earth oxides (REOs) is studied for their hydrophobic potential. The unique electronic structure of the rare-earth metal atom inhibits hydrogen bonding with interfacial water molecules resulting in a hydrophobic hydration structure where the …
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Thermal and Optical Properties of Oxide Coatings for High-Temperature Applications
… barrier coating (ETBC) applications. Rare-earth cations (including Nd, Sm, Er, Dy, Yb) are selective absorbers of thermal radiation due to 4f − 4f electronic transitions whose energies are largely insensitive to their local bonding environment. Consistent with this is that the optical …
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Catalytic combustion of methane with nanostructured barium hexaaluminate-based materials
… high combustion temperatures. Recently, complex oxides have been examined for methane combustion due to their enhanced thermal resistance. Barium hexaaluminate (BHA) was chosen for this research, since its unique crystalline structur~ has the potential to suppress grain growth at high …
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Green synthesis of Europium (III) Oxide nanoparticles using Hibiscus sabdariffa flower extract
… transforming the inorganic metal ions into metal oxides NPs via the bio-reduction of molecules present in the particular organism. This contribution reports on the synthesis, the main physical and optical properties of Europium (III) oxide (Eu2O3) nanocrystals synthesized for the first time by a …
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CEF-phonon interactions in rare earth sesquioxides: pressure-, temperature-, and magnetic field-dependent Raman scattering studies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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CEF-phonon interactions in rare earth sesquioxides: pressure-, temperature-, and magnetic field-dependent Raman scattering studies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms