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 17 of 17 for “"Solid State Synthesis"”.
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Solid State Synthesis of Bulk Amorphous Ni – 50AT% Ti Alloy
The mechanical alloying (MA) process and hot isostatic pressing (HIP) were used to synthesize bulk amorphous Ni-Ti alloy as an alternative to the traditional methods of casting multi-component metallic alloys. Samples milled cryogenically for 10 hours provided a homogeneous lamella structure with …
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A study of mechanochemical activation in solid-state synthesis of advanced ceramic composites
… processes are currently widely used for the synthesis of various compounds. Intensive (dry) milling of ultra-fine and nanometer-sized powders is considered to be a way of applying “mechanochemical activation” that involves dispersion of solids, generation and migration of defects in the bulk …
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Superoxide-assisted solid-state synthesis of birnessite type MnO2 materials: physiochemical properties and electrochemical viability
… This work reports a novel room-temperature solid-state synthesis of layered birnessite manganese dioxide. This synthetic method produces materials with variable physiochemical properties that can be tuned depending on the oxidant amount used in the synthesis. To further understand the …
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Thermal Stability and Solid State Cyclization of Dipeptides
… and thermally induced transformations of solid dipeptides were studied in a systematic way. Overall, 49 dipeptides were used with 15 different amino acids, including 10 hydrophobic and 5 hydrophilic, 14 standard (6 essential) and 1 non-standard, as well as 15 L- and 4 D-isomeric residues. …
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DISORDERING IN PYROCHLORE PHASES FOR RADIONUCLIDES DISPOSAL: A MULTISCALE STRUCTURE STUDY
… thesis, a systematic investigation of three solid solutions related to the Gd2Zr2O7 composition is performed. Namely, the following solid solutions are examined: Gd2(Ti1-xZrx)2O7, (Nd1-xGdx)2Zr2O7 and Gd2(Zr1-xCex)2O7. All the samples are produced by solid-state synthesis and structural …
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Thermodynamic and kinetic examinations of inorganic materials formation
… understanding of such factors can aid the synthesis of target materials and the discovery of new materials. Here, techniques for carrying out time-resolved studies were developed and demonstrated for the investigation of solvothermal and solid state reactions. Detailed kinetic reaction …
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New materials with potential for optical device applications: The synthesis and characterization of new mixed-metal quaternary sulfides and selenides
… materials. I have investigated the exploratory synthesis of new mixed-metal chalcogenides, particularly sulfide and selenide compounds, that might display potential for such applications. Our strategy in designing new compounds was to incorporate heavy metals, which display low or intermediate …
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Local structure of hybrid metal-halide perovskites
… was introduced by halide substitution through solid state synthesis, providing better stoichiometric control compared to solution based techniques. Composition and temperature dependent X-ray diffraction and heat capacity measurements of MAPb(ClxBr1−x)3 revealed a suppression of the symmetry- …
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Investigation of the factors contributing to the physical stability of biological therapeutics
… of GLP-1 produced by a single supplier using solid-state synthesis were found to exhibit batch-to-batch variation in their physical stability. These were characterised by a myriad of techniques to measure properties ranging from secondary structure and alterations in chemical composition, to …
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Structural phase transitions in synthetic analogues of the titanite structure type
… SrTiOGeO4, CaTiOGeO4, CaZrOGeO4 and the binary solid solutions CaTiO(GexSi1-x)O4, (CaxSr1-x)TiOGeO4 and Ca(TixZr1-x)OGeO4. All experiments have been performed on synthetic materials obtained by solid state synthesis from the respective oxides. In the case of the end-member composition CaTiOGeO4 …
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Study of growing incongruent antiferromagnetic single crystals and characterization
… that cannot be obtained by conventional solid-state synthesis. Here, multiple synthesis methods for single crystals of the metallic antiferromagnets Fe2As, FeSn, and Cr2Al were investigated. The chemical vapor transport (CVT) has been used to assemble large crystalline grains below their …
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Sustainable Development of New Phosphors for Photonics Applications
… established by previous studies, the method of synthesis affects the crystalline properties of a phosphor material. Therefore, very important to use a technique that will not require post-synthesis annealing for high yield. Mechano-luminescence (ML) is the emission of light by a phosphor through …
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Sustainable Mechanochemical Synthesis and Manufacturing of Metal-Organic Frameworks for Enhanced Hydrogen Storage
… known as HKUST-1) through green mechanochemical synthesis, solvent-free mechanochemical modification, and scalable cold-sintering-enabled monolithic moulding technology. The design of Experiments (DoE) methodology was applied to systematically optimise the mechanochemical synthesis of CuBTC, …
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Accelerating Materials Discovery with Machine Learning
… Using a recently released data-mined data set of solid-state synthesis reactions, we design a two-stage model to predict the products of inorganic reactions. We critically explore the performance of this model, showing that whilst the predictions fall short of the accuracy required to be …
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The Impacts of Particle Size Distribution and Electrode Structuring on NMC Cathode Performance
… each with two different particle sizes, were synthesised. The small NMC111 particles have an average particle size of 2.3 µm (standard deviation = 0.4 µm), while the big NMC111 particles have an average particle size of 5.5 µm (standard deviation = 0.8 µm). As for NMC811, the small particles …
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Advanced Materials for High-Energy Rechargeable Batteries: Borate Polyanion Cathodes and Silicon Anodes
… In Chapter 3, a detailed overview of the solid-state synthesis approaches is presented, including ball-milling, thermal treatment strategies, and the challenges encountered in achieving phase-pure samples. Structural characterisation using X-ray diffraction and neutron powder diffraction …
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Syntheses, Characterizations, and Properties of Suboxides and Layered Titanium-based Pnictide Oxide Superconductors
… BaTi2Sb2O was synthesized by high-temperature solid-state reaction within inert container. Its crystal structure was determined using X-ray powder diffraction and Rietveld refinement. BaTi2Sb2O crystallizes in a layered variant of the CeCr2Si2C structure type (space group P4/mmm (No.123)), and …