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 12 of 12 for “"carbothermal reduction"”.
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Solution-based synthesis and processing of nanocrystalline ZrB₂-based composites
… powders after suitable pyrolysis and borothermal/carbothermal reduction heat treatments. Single-phase ZrB₂ powders were prepared with initial composition of C/Zr = 4.8 and B/Zr = 3.0. ZrB₂-based composite powders with ZrC, ZrO₂, TaB₂, TaC, SiC, TaSi₂ and B₄C were prepared with particle sizes of …
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Aerogels for energy storage applications: From shape memory materials to thermites and explosives
… highly porous solid objects that provide density reduction compared to dense objects. Those materials can have applications in different classes of energy storage and the two types that are focused in this dissertation are mechanical energy and thermal energy storage. Shape memory materials can …
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NOVEL SYNTHETIC METHODS AND APPLICATIONS OF POROUS MATERIALS: AEROGEL FOAMS, METALLIC AEROGELS, AMORPHOUS AND GRAPHITIC CARBON AEROGELS
… cobaltia xerogel powder compacts via carbothermal reduction, for application as thermites. III. Carbon aerogels were synthesized from compressed compacts of polyurea- and polyacrylonitrile-crosslinked silica xerogel powders. The process of making aerogels-via-xerogels allows to …
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Analysis of lunar oxygen production methods under varying lunar conditions
… production that will be researched: hydrothermal reduction, carbothermal reduction, and water/ice electrolysis. Transportation from the Earth is also noted as a basis of comparison. These three methods were chosen because they are the three simplest, most studied methods of regolith reduction to …
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Towards Sustainable Electrosynthesis of Industrially Valuable Small Molecules
… chemical currently generated by energy-intensive carbothermal reduction. We demonstrate that the reduction of phosphate to phosphorus occurs near the limit of energetic and atom efficiency, portending future application as a milder and possibly carbon-neutral route for industrial phosphorus …
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Electrolysis of Molten Polyphosphate Salts Generates P₄ and O₂: Selectivity, Kinetics and Stability Behind a Promising Alternative to Carbothermal Phosphate Reduction
… industries, but it is currently produced via a carbothermal reduction rife with environmental and efficiency problems. In this work, we use the molten salt electrolysis of sodium polyphosphates to investigate an alternative means of white phosphorus production. In order to collect robust and …
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NOVEL NANOMATERIALS FOR ENERGY RELATED APPLICATIONS
… can be made possible, and further benefits the reduction of degree of pollution generated. In this research, synthesis, processing, characterization and application of nano materials towards energy generation and energy storage devices are studied. In chapter 2, superior corrosion resistance …
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Fundamental Understanding and Functionality of Silicon Oxycarbide
… of SiOC was proved to be predominant than local carbothermal reduction. In addition to these findings, a novel approach was developed through the Gibbs free energy minimization method to predict the phase content in PDCs with transition metal additives. And this work provides useful guidance to …
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Zinc oxide nanophotonics : toward quantum photonic technologies
… ranging from 3 μm to 15 μm were grown by a carbothermal reduction method. Optical characterization of ZnO microdisks was performed using low temperature (80 K) CL imaging and spectroscopy. The green emission is found to be locally distributed near the hexagonal boundary of the ZnO …
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Wide band-gap nanowires for light emitting diodes
… at high temperatures. Due to dependency of the carbothermal reduction of ZnO powder, which acts as the precursor source in the growth, the nanowire areal density was dependent on O2 flow. At low nanowire areal density, growth proceeded in a regime in which continuous nucleation of nanowires …
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Carbon Supported Metal Carbide Catalysts for the Reduction of Carbon Dioxide
… also consider the use of waste materials and reduction of chemicals needed to decrease energy and resource consumption while being economically feasible. The aim of this research was to prepare a molybdenum-carbide catalyst from petroleum coke (petcoke), an abundant waste material from oil …
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Chlorination of Titanium Oxycarbide and Oxycarbonitride
The project undertook a systematic study of chlorination of titanium oxycarbide and oxycarbonitride with the aim to develop further understanding of kinetics and mechanisms of the chlorination reactions. The project studied titania, ilmenite ores, and synthetic rutile reduced by carbon in argon and …