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Showing 1 to 20 of 38 for “"nickel oxide"”.
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Reaction sintering of yttria stabilized zirconia via nickel oxide
Includes bibliographical references (pages 49-52).
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The oligomerisation of propene over nickel oxide silica alumina
… techniQue was developed for the preparation of a nickel oxide sil ica alumina catalyst. The propene oligomerisation activity and the selectivity of the catalysts prepared by homogeneous decomposition deposition (HDD) were investigated and compared with nickel oxide silica alumina catalysts …
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Formaldehyde Combustion on Nickel Oxide (Multiplicity, Modeling Fuel, Auto Catalytic)
… and mechanism of formaldehyde combustion on nickel oxide at 493 degrees Kelvin were investigated. Formaldehyde was chosen because it has the attributes of a good modeling fuel--it reacts through a series of dehydrogenation and oxidation reactions and its gas phase combustion is extendable to …
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The Electrical Conductivity and Modulus of Elasticity of Polycrystalline Nickel Oxide
Made available in DSpace on 2014-12-10T17:32:32Z (GMT). No. of bitstreams: 1 6406077.pdf: 3679570 bytes, checksum: d7ca6a86f34b33eae0498bec735d6a44 (MD5) Previous issue date: 1963
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Deposition and characterisation of nickel oxide based coatings for advanced glazing applications
This thesis is a comparative study of nickel oxide based thin films for use as a counter electrode in a variable transmittance electrochromic device. Coatings have been prepared using anodic electrodeposition, colloidal precipitation and radio frequency (r.f.) sputtering. Systematic studies of the …
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Ab initio calculations of the electronic properties of the nickel oxide surface
… for the adsorption of atomic oxygen onto the nickel oxide (100) surface. The perfect surface is shown to be non-reactive, but enhanced binding is found for vacancy sites in the first two atomic layers. Of particular interest are a first layer cation vacancy and a second layer anion vacancy. …
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Synthesis, Fabrication and Surface Modification of Nanocrystalline Nickel Oxide for Electronic Gas Sensors
Recently, metal oxide gas sensors have attracted much attention in connection with monitoring of combustible and toxic gases because of their higher sensitivity, fast response and recovery times, low power consumption, and low fabrication cost. Nickel oxide (NiO) is a wide band gap and p-type …
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Field emission from carbon nanotubes deposited on platinum and nickel/nickel oxide multilayers
… functions were fabricated from platinum and from nickel / nickel oxide. Nickel oxide was deposited by e-beam evaporation or grown by thermal oxidation and characterized by Auger electron spectroscopy, x-ray diffraction and ellipsometry. Carbon nanotubes were deposited onto these test structures …
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Effect of composition and sintering temperature on silica-nickel oxide foams by slurry method
… The aim of this study is to fabricate silica-nickel oxide (SiO2-NiO) foams with 20 μm to 800 μm open pore size, 50% to 80% of porosity, good physical and mechanical properties. In this research, silica (SiO2) powder and nickel oxide (NiO) powder with different compositions of 2 wt.%, 4 wt.%, 6 …
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Investigation into the improved dispersion of nickel oxide over the surface of SOFC tubular anodes
Issues with nickel agglomeration and reduced porosity of SOFC anode tubes have been noted in previous investigations using carbon black as a porosity forming agent, this thesis looks at methods of improving these issues by investigation of alternative materials (carbon, graphite, flour) along with …
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Ultrasonic and electroplating approach for washcoat of γ-alumina and nickel oxide (nio) catalyst on fecral substrate for catalytic converter
… spalling since the loose adhesion and unstable oxide growth in long term oxidation. Therefore, the main objective of this study are to embed γ-Al2O3 into substrate, to improve thermal stability as well as to improve conversion efficiency of exhaust gas emission. The methods performed in this …
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THE EFFECT OF ALTERNATING DISTRIBUTION OF TRANSITION METALS IN LAYERED MATERIALS ON OXYGEN EVOLUTION CATALYSIS
… of few-layer catalysts constructed by manganese oxide sheets with different oxidation states. We stacked low-AOS manganese oxide sheets with high-AOS manganese oxide sheets in various ordered combinations to obtain few-layer birnessite samples with non-uniform distribution of Mn(III). We found …
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Removal of metal oxide defects through improved semi-anisotropic wet etching process
… defects are caused by incomplete removal of nickel oxides that form on top of the conductive nickel surface throughout the heated environment of the upstream process. This study classified and identified the composition of these excess metal defects, evaluated recommended wet etch methods to …
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Microstructure and Electrical Properties of Mocvd-Derived Perovskite Lead Zirconium(x) Titanium(1-X) Oxygen(3) and Lead (Scandium Tantalum)(1-X) Titanium(x) Oxygen(3) Thin Films on Lanthanum Nickel Oxide Electrode-Buffered Silicon
(3) Using the experience accumulated from growing PZT thin films, we expanded the work to grow relaxor ferroelectric thin films. Solid solutions of Pb(Sc1/2Ta1/2)1-xTixO 3 (x = 0--0.3) (PSTT) were grown. Phase evolution of the PSTT thin films with respect to the growth conditions, including growth …
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Engineering scalable device architectures for lead sulfide quantum dot solar cells
… The electrical and optical properties of a nickel oxide film are developed for a new hole-transporting buffer layer as I determine how deposition conditions impact the sputtered film. I integrate the sputtered nickel oxide film into a new quantum dot solar cell architecture that enables …
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Nanoengineered surfaces for improvements in energy systems : application to concentrated solar and geothermal power plants
… a 150 nm layer of platinum and a 550 nm layer of nickel oxide, oxidized nickel, and silicon carbide. The experimental results indicated that the platinum was an ineffective diffusion barrier, nickel oxide displays solar selective properties, and silicon carbide would be the best choice for a …
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Bistability and Electrical Characterisation of Two Terminal Non-Volatile Polymer Memory Devices.
… bistability of new materials; specifically, nickel oxide, barium titanate and methylammonium lead bromide and considers their properties which include nanoparticles, ferroelectric, perovskite structures and organic-inorganic composition. Due to their material properties which have different …
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Effect of a co-solvent feedstock on the synthesis of biodiesel via heterogeneous catalysis
… areas of study with the heterogeneous catalyst nickel oxide. Microreactors are being used to improve the efficiency of the production of biodiesel. The smaller scale makes it possible to produce biodiesel in seconds compared to what industrial biodiesel production requires hours to accomplish. …
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Magmatic processes that generated the rim andesites of Medicine Lake Volcano, N. California
… recorded in coexisting spinel and rhombohedral oxides varies from NNO (Nickel - Nickel Oxide) to NNO 0.7 log units. Experiments performed at 1 kbar - H20 saturated conditions at the NNO buffer on a primitive andesite reproduce most of the major element compositional variability exhibited in the …
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