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 50 for “"X-ray diffractometry"”.
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… studied using sheet resistance measurements, X-ray diffractometry (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), auger electron spectroscopy (AES) and annealing in a controlled ambient atmosphere"--Abstract, page iv.
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ΓΕΩΜΑΓΝΗΤΙΚΕΣ ΜΕΛΕΤΕΣ ΣΕ ΛΙΜΝΑΙΑ ΙΖΗΜΑΤΑ
… MAGNETIC EXTRACTS STUDIES (DEBYE-SCHERER X-RAY, DIFFRACTOMETRY, THERMOMAGNETIC EXPERIMENTS, MOSSBAUER SPECTROSCOPY AND OPTICAL MICROSCOPY) SHOWED THE PRESENCE OF ANGULAR FRESH MAGNETITE OR PARTIALLY OXIDIZED TOWARDS HAEMATITE, WITH SIZE RANGING FROM LESS THAN 1 MM UP TO FEW MICRONS. THE …
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Crystal engineering of novel organic-inorganic compounds of N- and O-donor dipyridyl ligands
… (OPE) Compounds prepared were characterised by x-ray diffractometry. Thermal analysis (thermogravimetry (TG), differential scanning calorimetry (DSC) and hot stage microscopy (HSM)) was used to determine the thermal behaviour of these compounds. Microanalysis was used to confirm elemental …
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Determination of Phase Fraction, Lattice Parameters and Crystallite Size in Mechanically Alloyed Fe-Ni Powders
… shaker mill at liquid nitrogen temperature. X-ray diffractometry was used to determine the phase fractions of the bcc and fcc phases in the alloys and to determine the lattice parameters and crystallite size. The main objective of this project is to study how the milling at low temperatures …
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Cavitation erosion of materials
… and transmission electron microscopy and X-ray diffractometry. The fractographic studies on the alloys revealed, in particular, the role played by second phase particles and other surface features such as protruding grain boundaries and surface steps created by dislocation movement, twinning …
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Coherent Scatter Computed Tomography for Core Composition Analysis of Intact Kidney Stones - Prospective Clinical Study
… Currently, infrared spectroscopy (IRS) and x-ray diffractometry (XRD) provide bulk composition results of urinary calculi in powdered form. Clinicians use the results to prescribe medical and dietary measures to restore the physiologic chemical balance of urine or rather alter it for the …
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Effects of processing on microstructure and properties of Ti-Ta Alloys
… Ti - 30 wt % Ta systems . Energy-dispersive x-ray analysis was used to quantify compositional gradients to verify homogeneity. Room temperature and high temperature x-ray diffractometry was used to identify phases present at temperatures ranging from room temperature up to 750 [degree]C. Hot …
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Investigation of co1-2xnixmnxceyfe2-yo4 double-substitution spinel for highly efficient detection of flammable and hazardous liquefied petroleum gas: sensing performance
… Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4 spinel ferrites. X-ray diffractometry (XRD), high resolution transmission electron micrographs (HRTEM), and X-ray photoelectron spectroscopy (XPS) of the samples confirm the formation of the spinels. The gas sensing performance of these samples was tested at an …
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Synthesis and Fabrication of Alpha Phase Iron Oxide (α-Fe2O3) Nanostructured doped with Ruthenium for Highly Sensitive and Selective Flammable and Toxic Gas Sensor
… some characterisation techniques, such as X-ray diffractometry, thermogravimetric analysis, x-ray photoelectron spectroscopy, Brunauer-emmett-teller surface area analysis, scanning electron microscopy, and high-resolution transmission electron microscopy, to study certain properties of the …
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The effect of age on the structure and compostition of the cell walls of Choanephora cucurbitarum
… visible and infrared spectrophotometry, x-ray diffractometry and electron microscopy. Qualitative evaluation revealed the presence of lipids, proteins, neutral sugars, strong alkali soluble sugars, chitin, chitosan and uronic acids in the cell walls of both the 1 and 7 day old cultures. As …
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DC magnetron reactive sputtering of low stress AlN piezoelectric thin films for MEMS application
… response characterization was conducted with x-ray diffractometry, spectroscopic ellipsometry, and surface profilometry. Optimization of film deposition parameters improved AIN film properties in the MEMS sensors. Film property characterization using response surface methodology indicated …
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Towards the development of calcium ion batteries
… samples was confirmed by energy dispersive x-ray spectroscopy. X-ray photoelectron spectroscopy and x-ray diffractometry studies provided supporting evidence of calcium intercalation into the Mo3Se4 Chevrel phase structure. Furthermore, preliminary results are presented involving beryllium and …
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The Interplay Between Anions And Radicals In Synthesis, Spectroscopy, And Catalysis
… studied via a combination of single crystal X-ray diffractometry, electrochemistry, NMR spectroscopy, and reactivity. These studies were developed to understand new fundamental bonding between new types of bonds or to understand these species role in reactivity. Either the presence of CuI …
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Formulation of novel buccal mucosal drug delivery systems for nicotine replacement therapy (NRT)
… (SEM) (surface and internal morphology), X-ray diffractometry (XRD) (physical form), attenuated total reflectance – Fourier transform infrared (ATR-FTIR) spectroscopy (physical interactions), thermo gravimetric analysis (TGA), differential scanning calorimetry (DSC), (thermal profiles) and …
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Supercapacitor electrode materials based on nanostructured conducting polymers and metal oxides
… of electrode materials collected by x-ray diffractometry, transmission electron microscopy, scanning electron microscopy and Fourier transform infra-red spectroscopy was demonstrated. N₂-physisorption produced surface area and pore size distribution data of high quality. Cyclic …
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THE REACTIVITY OF SOME TRANSITION METAL NITRIDES AND CARBIDES
… X are explained along with the application of x-ray dififractometry ajid scanning electron microscopy to work in this area. In this present research selected transition metal nitrides and carbides have been oxidised in air and carbon dioxide. Activation energies have been determined for these …
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Geology and Geochemistry of Muyexe Magnesite Deposit, Giyani Greenstone Belt, Limpopo Province, South Africa
… studies using petrographic microscopy and X-ray fluorescence spectrometry and identification of minerals in rocks and magnesite through X-ray diffractometry. A total of 20 magnesite and 4 host rock samples were collected from the Muyexe magnesite deposit. Furthermore, 62 rock samples were …
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The Mechanical Thermal and Microstructural Behaviors of the Strip Silicates Reinforced Epoxy-based Nanocomposites
… was catastrophic. On the other hand, from X-Ray Diffractometry (XRD), it was shown that there was no nanoclay peak shifting in the epoxy matrix. Moreover, it was further verified by Dynamic Mechanical Analyzer (DMA), Thermomechanical Analyzer (TMA) and Thermogravimetric Analyzer (TGA) that …
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Direct Growth of Carbon Nanotubes on Inconel Sheets Using Hot Filament Chemical Vapor Deposition
… (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD), and Raman spectroscopy. Field electron emission (FEE) properties of the CNTs were also tested. Oxidation-reduction method was adopted in direct growth of CNTs on Inconel 600 plates and proved effective. The effect of …
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Solid transformations and premelting phenomena in fluorite structures and the system SrCl₂BaCl₂
… were studied by high temperature x-ray diffractometry, differential thermal analysis, and thermodilatometric analysis. Thermal expansion characteristics of CaF<sub>2</sub>, BaF<sub>2</sub> and SrCl<sub>2</sub> are very similar. The structures expand normally at lower temperatures and …
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