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 20 of 21 for “"high temperature processing"”.
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Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing
… sulfidation mechanism involved for actual magnet processing.
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Isolation and Characterization of Thermostable Alpha-Galactosidases for Application of High-Temperature Processing of Soy Molasses
… were examined for their potential use in processing of soy oligosaccharide waste by-products. The $\alpha$-galactosidase of strain KM-THCJ has been purified to homogeneity and has a MW of ca. 176 kDa and a subunit MW of ca. 88 kDa occurring as a dimer, as determined by gel filtration …
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Heat Transfer and Thermal Process Design in Scraped-Surface Heat Exchangers
… heat exchanger (SSHE) for use in ultra-high temperature processing of low-acid liquid foods was evaluated using a Contherm 6 x 2 pilot-scale unit. Independent variables tested were steam pressure, blades rotational speed, inlet
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Microstructural studies of vapor-deposited nickel/ceramic composites
… compound formation, comparing ion-assisted and high temperature processing.
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Simulation of iron impurity gettering in crystalline silicon solar cells
… impurity gettering in silicon solar cells during high temperature processing. The tool also includes a device simulator to calculate cell performance after processing. By linking input materials, processing, and cell performance, 12E enables accelerated solar cell optimization. Herein, background …
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Sintering and joining of low temperature co-fired tungsten and aluminum oxide
… tungsten/alumina composites usually rely on high temperature processing (>1500C). As it would be beneficial or even necessary for some applications to produce such composites at relatively low firing temperatures, low-temperature processing techniques and the attendant knowledge of …
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Root cause defect identification in multicrystalline silicon for improved photovoltaic module reliability
… at 22-25% annual growth rate while maintaining high performance and low selling price. The most suitable material substrate to enable this scale-up is cast multicrystalline silicon (mc-Si) due to its low operating cost and capital requirements compared to other technologies. However, a new form …
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A multi-process reactor for thin film transistor fabrication at low temperatures
… substrates, which are incompatible with standard high temperature processing techniques. A variety of processes can be performed sequentially in the system without removal of the substrates from vacuum. This integrated processing ensures good quality interface and film properties.<br/><br/>High …
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HIGH TEMPERATURE NANOMANUFACTURING FOR EMERGING TECHNOLOGIES
High temperature processing can provide sufficient activation energy for materials’ compositional, structural, and morphological evolutions, and is essential for various kinds of reactions, synthesis, and post-treatment. However, the current high temperature heating sources, mostly furnaces, are …
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Carbon nanotube growth on challenging substrates : applications for carbon-fiber composites
… metal catalysts (such as carbon fibers). New CVD processing techniques based on materials properties unique to this class of catalysts are presented and explored. Coatings for enabling growth of aligned CNTs on carbon fibers, coatings for improving adhesion of materials to carbon fibers, and …
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Novel phosphors for solid state lighting
… However, the capital contribution is still to high to encourage widespread adoption. Furthermore, the colour from today's devices is unsuitable for general room illumination and thus new phosphor materials are needed. This dissertation will examine the synthesis of inorganic nanoparticles and …
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Advanced Integration of Devices Enabled by Laser Crystallization of Silicon
The push for higher levels of performance drives research and innovation in all areas of electronics. Thus far, shrinking circuit sizes and development of new material systems have satisfied this need. Continued scaling and material improvements have become increasingly difficult; simultaneously, …
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Piezoelectric, Dielectric and Ferroelectric Thin Films on Metal Substrates for Microelectronic Applications
… applications. Investigations on the key processing parameters and properties relationship for lead zirconate titanate (PZT, 52⁄48) and barium zirconate titanate (BZT, 35⁄65) based thin films on Cu foils were performed and studied. The impact of the oxygen partial pressure on the …
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Microstructural Evolution in Refractory Metal Multi-Component Alloy Systems
… and power-generation efficiency targets demand higher operating temperatures than those tolerated by current Ni-based superalloys, motivating the search for alternative high temperature materials. Refractory superalloys based on AlTaTiZr and AlMoNbTaTiZr have attracted particular interest, as …
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Preparation and characterization of barium based perovskite dielectrics on different bottom electrodes by chemical solution deposition
… atmospheres with base metal electrodes) and high processing temperatures. Another drawback of CSD based technique is the number of coatings required to achieve mesoscopic thicknesses (500 nm - 800 nm). It is the aim of this thesis to examine new methods of processing at lower temperatures …
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Structure and properties interrelationships of SrBi₂(Ta<sub>1-x</sub>Nb<sub>x</sub>)₂O₉
… current densities on Pt electrodes. However, high temperature processing, ie. 750 - 800°C, is needed for SBT to exhibit ferroelectric properties. Moreover, the fundamental properties of SBTN have not been fully characterized. In this research, SBTN solid solutions were studied from two …
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Ferroelectric Thin Films for High Density Non-volatile Memories
… (FRAM) are considered as future memories due to high speed, low cost, low power, excellent radiation hardness, nonvolatility, and good compatibility with the existing integrated circuit (IC) technology. The non-volatile FRAM devices are divided into two categories, based on reading technique: …
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Effects of nitrogen treatments and processing conditions on acrylamide formation in potato chips or French fries
The aim of this work was to examine the effect of frying conditions and blanching with different additives on the acrylamide content in potato chips. Furthermore, acrylamide formation in French fries was examined in relation to different nitrogen fertilization strategies and potato strip size. …
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Scalable Fabrication of High Efficiency Hybrid Perovskite Solar Cells by Electrospray
… fabrication of silicon solar cells requires high-vacuum, high-temperature, and energy intensive processes. The combination of excellent opto-electrical properties and cost-effective manufacturing makes hybrid perovskite a winning candidate for solar cells. As power conversion efficiencies of …
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Design, Processing, and Characterization of Nanocomposites
Structure and processing of polymer composites are essential for not only optimizing materials properties for high performance applications, but also making materials more environmentally sustainable. In the aerospace and automobile industries, the need for lightweight materials to increase fuel …
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