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 7 of 7 for “"doped oxides"”.
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Preparation of high purity doped oxides for fundamental studies
… 0.1, 0.5, and 1.0 mol % NiO, Co3O4, and Fe2O3-doped YSZ from all acetate precursors. The synthesized materials were calcined at temperatures between 600 degrees C and 1000 degrees C to produce powders that were then pressed into compacts and sintered at 1500 degrees C. The powders and compacts …
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Photoluminescence in rare earth activated oxides and II-VI chalcogenides
… with the luminescent properties ·of rare earth doped oxides and the IT-VI chalcogenide CaCdS. Both materials are luminescent by very different mechanisms. Luminescence from CaCdS is due to transitions between the conduction and valence band. Emission spectra were found to be much sharper than in …
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Template Directed Growth of Nb doped SrTiO₃ using Pulsed Laser Deposition
… a wide range of physical properties. Recently, doped complex oxides have drawn considerable attention for various applications including thermoelectrics. Doped complex oxide materials have high Seebeck coefficients (S) and electrical conductivities (o) comparable to other doped semiconductors …
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Magnetic and Transport Properties of Oxide Thin Films
… properties of transition metal and rare earth doped oxides, particularly SnO2 and HfO2 thin films. Cr- and Fe-doped SnO2 films were deposited on Al2O3 substrates by pulsed-laser deposition. Xray- diffraction patterns (XRD) show that the films have rutile structure and grow epitaxially along the …
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Nanoparticle Cerium oxide and Mixed Cerium Oxides for Improved Fuel Cell Lifetime
… this project has given new direction for doped cerium oxide nanoparticles in hydrogen fuel cells. Both gadolinium and praseodymium doped cerium oxide nanoparticles have been shown to be poor choices for improving fuel cell lifetime, while zirconium doped cerium oxide nanoparticles show the …
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High throughput methods for synthesis and impedance characterisation of ABO3 gas sensing materials
… gas sensors. Substrate plates of diverse metal-doped oxides were rapidly synthesised and screened with the high throughput impedance spectroscopy setup. 64 different materials could be screened on one multi electrode substrate. The measurements were performed between 200 and 500°C and the test …
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Thermal and Optical Properties of Oxide Coatings for High-Temperature Applications
… This thesis describes how they can be doped with cations that absorb thermal radiation by electronic transitions. Recent work on an ultrafast high temperature sintering (UHS) technique has also been demonstrated to accelerate the development of coatings for environmental-thermal barrier …