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Showing 1 to 20 of 124 for “"Rutile"”.
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Computer simulation of grain boundaries in rutile
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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A study on wettability properties of rutile-phase TiO2 nanostructure film
… thus the study of the wettability properties of rutile-phase TiO2 film is introduced for self-cleaning application. TiO2 is fabricated using the hydrothermal synthesis method at 150°C. The fluorine-doped tin oxide (FTO) is used as a substrate to grow the TiO2 nanostructure by mixing hydrochloric …
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Oxygen self-diffusion via a mobile intermediate species in rutile titania
… found that an atomically clean (110) surface on rutile titania allows for facile injection of a mobile oxygen intermediate other than the doubly-charged oxygen vacancy. Characteristic exponential tail profiles coupled with the observation of a positive oxygen partial pressure dependence on …
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Interfacial properties of epitaxial gold nanocrystals supported on rutile titanium dioxide
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-05-21T19:41:46Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Sivaramakrishnan_Shankar.pdf: 4315177 bytes, checksum: ef713ab0245c060570154d04e3d0fdcf (MD5)
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Surface chemistry to control bulk reaction dynamics of native point defects in rutile titanium dioxide
… network of oxygen and titanium interstitials in rutile titanium dioxide and (2) determine the role of surfaces in changing the kinetics for the sequestration of oxygen and titanium interstitials at bulk extended defects. The diffusion-reaction networks of oxygen and titanium interstitials are …
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In-situ electron imaging of oxidation and reduction of rutile (TiO2) nanocrystals and interaction with palladium
Metal nanoparticles supported on oxides exhibit excellent catalytic properties for chemical reactions that impact several industries, for example, Pd/CeO2 is used in the catalytic converters of automobiles for environmental remediation, Rh/ZrO2 is used for fuel refinement, and Pt/TiO2 is an …
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The Effect of Zr-Doping and Crystallite Size on the Mechanical Properties of TiO2 Rutile and Anatase
… processes. The most abundant phases are rutile, anatase and brookite. In addition, there are a number of metastable low density modifications. The compression behavior of anatase and rutile was studied for TiO2 and Ti0.9Zr0.1O2 starting materials with crystallite size in the micro- and …
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Density Functional Theory Study of Rutile SiO₂ Stishovite: An Electron Pair Description of Bulk and Surface Properties
… stoichiometric (110) surface of stishovite, rutile structure type SiO₂, has been studied using a first principles, density functional method. The geometric and electronic structure, including the density of states, charge density, and electron localization function for both the bulk and the …
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PMN/PT and rutile LAC voltage breakdown dependency with respect to backfill gas, voltage rates of rise, and pressure
Previous work on the breakdown behavior of PMN-PT and TiO2 Lightning Arrester Connectors (LAC) has limited the focus to only a few gasses, pressures and rates of rise of the applied voltage. Through this thesis a more comprehensive look into the breakdown behavior of these LACs and how they respond …
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Experimental study of the effect of H2O-CO2-NaCl fluid immiscibility on the reaction calcite + quartz + rutile = sphene + CO2 at 2 KBAR
… of the reaction boundary calcite + quartz + rutile = sphene + CO₂ has been experimentally determined in H₂0-CO₂-NaCl fluids at 2 kbar. Extent and direction of reaction were monitored by the CO₂ weight change method using natural materials. All bulk compositions contain 23 wt. % NaCI, relative …
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A study of the absorption spectra of titanium dioxide single crystals (rutile) from the ultraviolet to the infrared as a function of temperature
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1958.
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Reaction phenomena of iron oxide leaching in an evaporative acid bake reactor
… two major products, zircon (zr02.Si02 99.9%) and rutile (Ti02 99.9%) at a combined annual rate of 140kt. The heavy mineral concentrates are exported to international markets to make specialist coatings for the paints and ceramics industries. The ceramic industry is very strict on the purity of the …
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Estimating the thickness of an ultrahigh-pressure (UHP) terrane: insights from phase equilibria modelling and Zr-in-rutile thermometry, Dulan area, North Qaidam terrane, China
… protolith had a magmatic origin. Zr-in-rutile thermometry reveals that Dulan eclogites record peak temperatures of 647-711°C. Spatially distributed peak temperatures show an east-west temperature gradient of ~1 °C km-1 and a slow temperature increase of ~1 °C Myr-1. Our results indicate …
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The deposition of silica on titanium dioxide surfaces
… of amorphous silica from aqueous solution on to rutile particles has been studied with the aim of elucidating the nature of the silica-titania interactions occurring and of following the progressive build up of the silica coating. The coating process, which involves the addition of an aqueous …
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Synthesis and characterisation of Titania thin films
… at 800°C and 1000°C showed mixed-phase anatase + rutile and pure rutile, respectively. Laser Raman microspectroscopy and X-ray diffraction showed the presence of residual stress, probably resulting from contamination, Si diffusion into the films, and/or oxygen deficiency. Effect of thermal …
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Decorating Crystallites with Atoms and Small Molecules: A First-Principles Investigation
… onto semiconducting and insulating surfaces with rutile and rock-salt structures respectively, was investigated using van der Waals corrected-density functional theory. DFT-D3, DFT-TS, vdW-DF and its variants were employed to carry out the calculations. Surface energies and atomic displacements …
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Chlorination of Titanium Oxycarbide and Oxycarbonitride
… studied titania, ilmenite ores, and synthetic rutile reduced by carbon in argon and nitrogen and chlorinated at different temperatures, gas flow rates and compositions. Chlorination of titanium suboxides, iron and impurities in ilmenite was also examined. Chlorination of titanium oxycarbide …
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Synthesis and characterization of novel fluoride and oxide cathodes for rechargeable batteries
… explored as candidate cathode materials: the dirutile and rutile polymorphs of LiMnF4, and layered lithium-excess . . . Dirutile LiMnF4 was identified from high-throughput computation as a promising conversion cathode. The dirutile polymorph was synthesized through a new low temperature route, …
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Geology of the Piney River-Roseland titanium area, Nelson and Amherst counties, Virginia
… plus introduced or recrystallized quartz, rutile, and ilmenite. The mafic minerals include tremolite or anthophyllite, in complete or partial pseudomorphs after coarse-grained pyroxene crystals, and abundant alteration halos of biotite and chlorite. Most of the rocks have a well developed, …
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