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Showing 1 to 20 of 47 for “"aluminium oxide"”.
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Growth and Characterisation of Spray Pyrolytic Doped Zinc and Aluminium Oxide Spectral-Selective thin Films
Metal oxide thin films have been used in thin film solar cells and other solar energy applications for many years. The main concern has been to improve their physical, electrical and optical properties in order to increase their efficiency and lower their production costs. Zinc oxide doped with …
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Growth and Characterisation of Spray Pyrolytic Doped Zinc and Aluminium Oxide Spectral-Selective thin Films
Metal oxide thin films have been used in thin film solar cells and other solar energy applications for many years. The main concern has been to improve their physical, electrical and optical properties in order to increase their efficiency and lower their production costs. Zinc oxide doped with …
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A DIGITAL DATA ACQUISITION SYSTEM FOR INELASTIC ELECTRON TUNNELLING SPECTROSCOPY
… (C6H5C00) absorbed at monolayer coverage on aluminium oxide. Mode energy and intensity measurements of high accuracy are reported. Small (<0.4 meV) non-systematic increases in absorbed mode energies occur when the oxidised electrode is positively biased. Possible causes of this phenomenon are …
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INELASTIC ELECTRON TUNNELLING SPECTROSCOPY (lETS) OF SILANE COUPLING AGENTS
… monolayers of silane coupling agents adsorbed on aluminium oxide. The technique of lETS is surface specific and uses electrons to excite vibrational modes of the adsorbate. Since the tunnelling electrons perturb both the dipole moments and polarizability ellipsoids of the molecules both infra-red …
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Study of Ellipsometric Applications and Examination of Optical Anisotropy in Aluminium and Silicon Oxides
… was used to study optical anisotropy in aluminium and silicon oxides by rotating the samples about their normal surface. The optical anisotropy in the aluminium oxide was detected in a polycrystalline (as received) and electropolished single crystal. In silicon oxide, optical anisotropy …
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Organic Electronics by Self-Assembly
… with field effect transistors based on zinc oxide nanoparticles. Stable dispersions of zinc oxide nanoparticles allow the fabrication of zinc oxide transistors by solution processes. Despite the high intrinsic electron mobilities of zinc oxide, a large surface to volume ratio of nanoparticles …
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Modelling and computational analysis of heat-transfer in multi-geometry and multi-phase flow of Newtonian and non-Newtonian fluids in pipes and channels
… two types of nano-particles will be considered, aluminium oxide (Al2O3) and titanium oxide (TiO2) nano particles. The non-Newtonian fluids in this thesis are modelled via the Giesekus viscoelastic constitutive equations. For the multi-geometry heat-exchanger problems, the thesis will focus …
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Spectroscopic investigations of new glass-ionomer dental cements
… of signals arising from chromium ions in the aluminium oxide matrix as a function of reaction time.;Different conventional cements were prepared by mixing Fuji II glass with various polyacids. Emission spectra were collected and analyzed. The differences of the setting reactions (due to …
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Reactive magnetron deposition and characterization of ZrN thin films for decorative and field emission applications
… films were deposited on substrates of Si<100>, Aluminium strip, brass strips and glass, by DC magnetron sputtering system under varying conditions of power, pressure, argon and nitrogen gas flow rates as well as temperature, and were characterized by SEM/EDX, AFM, Colour photospectrometer, RBS …
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FUNCTIONAL THIN FILMS BY SPATIAL ATOMIC LAYER DEPOSITION FOR PHOTOVOLTAIC APPLICATIONS
… lower cost. The fabrication and development of aluminium oxide films for surface passivation in silicon wafer solar cells and zinc oxide (undoped and doped) films for application as transparent conductive oxides in thin film solar cells and heterojunction silicon solar cells is investigated …
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An investigation into Vibratory Grinding of hard-to Machine Aerospace Materials
… direction of the grinding feed rate, using an aluminium oxide grinding wheel, with the application of coolant fluid to enhance grinding difficult to machine aerospace materials, this approach is considered to be an alternative to the usage of super abrasive wheels such as CBN and diamond wheels …
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Heterogeneous Reactions of Nitric Acid and Dinitrogen Pentoxide on Mineral Dust Surfaces: A Knudsen Reactor Study
… reactions of nitric acid and dinitrogen pentoxide with various authentic dust, mineral and clay mineral surfaces has been investigated my means of the Knudsen reactor techique at room temperature. Authentic dust surfaces from the Saharan, the Chinese and the Arizona dust regions were used as …
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Electrochemical synthesis of functional nanowires
… deposition in the pores of anodic aluminium oxide (AAO) and polycarbonate track-etched (PCTE) templates. With the work focusing on CdSe nanowires, results from the cyclic electrodeposition/stripping method was reported with different deposition conditions(potential range, solution, …
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High-temperature corrosion protection of gas turbine blades with micro-coatings and nano-coatings : simulation and experiments
… for the micro-coating (double layer coating). An aluminium oxide and titanium oxide mix was deployed for the nano-coating (single layer coating). TGA (thermo-gravimetric analysis) and SEM (scanning electron microscopy) tests of both flame-sprayed micro- and nano-coated specimens have been …
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Determination of space charge characteristics on contaminated XLPE insulator
… remain unanswered. These minerals Silicone Dioxide, Titanium Dioxide and Aluminium Oxide exist due to its content in underground soil. The purpose of this study is to determine space charge effects towards contaminated XLPE insulator with these contaminants forming a uniform layer on cable. …
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Suitability of Thulamela Clays for Use in The Ceramic Industry: A Case Study in Thulamela Municipality, Limpopo Province, South Africa
… high plasticity, and XRF analysis identified aluminium oxide (Al2O3), silicon dioxide (SiO2), and iron oxide (Fe2O3) as dominant chemical elements. XRD analysis detected quartz, kaolinite, and hematite as primary minerals, with variations between samples. The study identified Ha-Matsika, …
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Surface and interface characterisation of high-k dielectric materials on silicon and III-V semiconductor substrates
Interface formation between high-k dielectric oxide materials and semiconductor surfaces is of critical importance to the development of the next generation of high speed semiconductor devices. This thesis investigates the deposition and characterisation of a range of candidate high-k materials on …
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THE EFFECT OF STRAIN ON THE ELECTRICAL RESISTIVITY OF THIN FILMS
… gold films and the gauge factor and T.C.R. of aluminium/aluminium oxide films have been measured. The measured gauge factors are discussed in terms of a meandering three-dimensional conduction path.
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Properties and environmental impact from mosaic sludge industry incorporated into fired clay bricks
… soil and mosaic sludge was high with silicon dioxide and aluminium oxide and with the same chemical composition BS and PS are suitable to replace clay soil as raw materials. The recommended percentage of BS and PS incorporation was up to 30% with better physical and mechanical properties. The …
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