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Showing 1 to 20 of 420 for “"Al2O3"”.
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Characterization of Pt/Al2O3 and Pt-Re/Al2O3 reforming catalysts and their evaluation using a naphtha feedstock, The
Includes bibliographical references.
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Electrical conductivity in the FeO·Fe2O3-Al2O3-SiO2 system.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
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Pyrolyse- und Sinterverhalten Sol-Gel-abgeleiteter Al2O3-YAG-Fasern
… Sol-Gel-Vorstufen, die zu einem Mischgefüge aus Al2O3 und YAG führen (Volumenverhältnis 45 : 55), wurden zu Fasern versponnen, in unterschiedlichen Atmosphären pyrolysiert und abschließend gesintert. Die strukturelle Ent-wicklung während der Pyrolyse der Gel-Fasern wurde in Abhängigkeit von …
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Al/Al2O3 microchannel plasma chemical reactor for ozone synthesis
… low temperatures and generated within alumina (Al2O3) microchannels. The array of microchannels device is fabricated from aluminum foil by chemical processing and mechanical ablation with photolithographic steps. Channels with 3 cm in length and 250 μm in width at the aperture of the channel …
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Ion probe measurement of oxygen self-diffusion in Al2O3.
Thesis. 1977. Sc.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
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Entwicklung hochfester Net shape Oxidkeramiken im System Al2O3-SiO2-ZrO2
… von dichtgesinterten Oxidkeramiken im System <br>Al2O3-SiO2-ZrO2 entwickelt, bei dem als reaktive <br>Komponenten anstatt der reinen Metalle intermetallische Verbindungen <br>wie ZrAl3, ZrSi2 und Zr2Si verwendet werden. <br> <br>Während des Reaktionssinterns in Umgebungsluft werden die …
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Freeze Casting of Aqueous PAA-Stabilized Carbon Nanotube-Al2O3 Suspensions
… characterize a colloidal suspension of a 38 nm Al2O3 powder. The dispersant, dispersant amount, pH and solids loading were examined to determine the best conditions for freeze casting. Based on adsorption and viscosity data, optimal conditions for freeze casting were found with Poly(acrylic …
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Processing, Microstructural And Mechanical Characterization Of Mechanically Alloyed Al-al2o3 Nanocomposites
… with volume fractions of 20, 30, and 50 % and Al2O3 particle sizes of 50 nm, 150 nm, and 5 µm. X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques were used for the crystal structure and microstructural characterization of the powders at different stages of milling. Al2O3 …
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ENGINEERING NI/AL2O3 CATALYSTS BY ATOMIC LAYER DEPOSITION FOR METHANE REFORMING
<p>"Dry reforming of methane (DRM) could be a promising choice to utilize natural gas (mainly methane or CH<sub>4</sub>), recycle captured CO<sub>2</sub>, and produce valuable syngas. Promoters (e.g., CeO<sub>2</sub> and MgO) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by atomic layer deposition …
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The effect of reactive elements on the growth of Al2O3 scales
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1992.
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Structure sensitivity of H2/D2 Isotopic Exchange on Pt/Al2O3 catalysts
Pt-supported catalysts are widely used industrially for hydrogenation reactions. However, the kinetics of hydrogen activation, a critical step for any hydrogenation reaction, is still not well understood on supported Pt surfaces. Recent studies had shown that activity and selectivity vary with Pt …
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The adsorption of arsenic (V) by iron (Fe2O3) and aluminum (Al2O3) oxides
… of the steel industry, and aluminum oxide (Al2O3) as a chemical powder. Due to their fast adsorption of As(V) anions and low cost, (Fe2O 3) and Al2O3 were found to be good and inexpensive adsorbents in lowering As(V) initial concentration in drinking water at a lower pH (< 7). In the …
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Optical modeling off-stoichiometric amorphous Al2O3 thin films deposited by reactive sputtering
This work was initiated from a question brought up by previous research about how the optical properties of alumina droplets/particles found in solid rocket motors are related to their stoichiometry. We approached this question by adopting methods common in thin film technology. …
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Reducción catalítica de nitratos en agua utilizando catalizadores Pd / Al2O3, monometálicos y promovidos
En esta tesis se realiza un estudio de catalizadores mono y bimetálicos para la reducción de nitrito y nitrato en agua. Además se empleó un reactor de membranas de paladio para la reducción de nitrito. Mediante el estudio teórico se intentó justificar algunos de los resultados obtenidos. Los …
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