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 216 for “"Pressure-Temperature"”.
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Pressure-Temperature Phase Diagram of LiAlH4
High pressure behavior of complex hydrides is investigated in this thesis. Raman spectroscopy was performed at different temperatures and pressures to determine structural changes in LiAlH4. In situ high-pressure/high-temperature Raman spectroscopy experiments were carried out using resistively …
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Diffusion of organic liquids : pressure, temperature studies
… and used for self-diffusion measurements at pressures up to 1500 x 10⁵ Nm⁻² and for a temperature range from 283.2 K to 328.2K. It has been shown how the bulk flow that occurs in the cell can be calculated and the diffusion coefficient obtained. Self-diffusion coefficients are reported for …
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Diffusion of organic liquids : pressure, temperature studies
… and used for self-diffusion measurements at pressures up to 1500 x 10⁵ Nm⁻² and for a temperature range from 283.2 K to 328.2K. It has been shown how the bulk flow that occurs in the cell can be calculated and the diffusion coefficient obtained. Self-diffusion coefficients are reported for …
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Pressure-temperature boundaries for ideal dissociating and ionizing gases
… ideal ionizing gas theory explicitly defines the pressure-temperature region throughout which the theory is applicable. In the present work an analytic expression is developed which gives the limiting temperature as a function of pressure for the ideal dissociating gas theory. The method is then …
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Study of Functional Complex Oxides at High Pressure-Temperature Conditions
… representative complex oxides studied under high pressures and temperatures. Synchrotron X-ray diffraction, Raman spectroscopy, neutron scattering, and first-principles calculations were used to probe the structural response of Li2CoO2F across multiple length scales. These studies reveal how …
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Pressure-Temperature Nmr Studies of Polymer and Disordered Crystalline Systems
Made available in DSpace on 2014-12-13T20:09:32Z (GMT). No. of bitstreams: 1 7606679.pdf: 7531405 bytes, checksum: 7391d3c0c47cd3b6ba2321aea8aa5649 (MD5) Previous issue date: 1975
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Iron in oxides, silicates and alloys under extreme pressure-temperature conditions
… are unknown, as well as the effect of pressure on physical properties of Pv at conditions of Earth lower mantle. In our study we investigate Pv with one of the less explored substitution Mg2+A+Si4+B→Fe3+A+Al3+B. Here we explore as a function of pressure and temperature the crystal …
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An analysis of pressure-temperature-time histories of eroding orogenic belts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1987.
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Fast estimation model of pressure-temperature response for planning focused ultrasound surgery
… the first part of this dissertation, patterns of pressure field variations with several selected design variables (kerf, transducer element’s number and element’s width-height) are studied. These patterns indicate that there is a more suitable shape and arrangement of transducer elements in a …
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Pressure, temperature, and stress conditions of Southern Alpine Fault (New Zealand) mylonites
… is likely that these differences in stress and temperature are related to variation in geothermal gradient between the two areas, with the southern Alpine Fault escaping rapid exhumation that advected considerable heat into the upper crust of the central Alpine Fault over the past ~6 m.y.. The …
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PRESSURE-TEMPERATURE EVOLUTION OF METAPELITES WITHIN THE ANACONDA METAMORPHIC CORE COMPLEX, SOUTHWESTERN MONTANA
This study shows the complete metamorphic evolution of metapelitic footwall rocks in the Anaconda metamorphic core complex, located in southwestern Montana. Pseudosections were constructed using the computer program THERMOCALC (v. 3.26) in conjunction with the internally consistent dataset of …
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PRESSURE-TEMPERATURE EVOLUTION OF METAPELITES WITHIN THE ANACONDA METAMORPHIC CORE COMPLEX, SOUTHWESTERN MONTANA
This study shows the complete metamorphic evolution of metapelitic footwall rocks in the Anaconda metamorphic core complex, located in southwestern Montana. Pseudosections were constructed using the computer program THERMOCALC (v. 3.26) in conjunction with the internally consistent dataset of …
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Pressure-temperature-time constraints of metamorphism and tectonism in the Tauern Window, Eastern Alps
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.
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The carbon speciation in the Earth’s interior as function of pressure, temperature and oxygen fugacity
… °C. The experiments were performed up to temperatures where carbonate melts evolve towards more silicate-rich compositions. The dilution of the carbonate melt component was found to lower the relative fo2, expanding the melt stability field with respect to reduced carbon. The results allow …
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CEF-phonon interactions in rare earth sesquioxides: pressure-, temperature-, and magnetic field-dependent Raman scattering studies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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CEF-phonon interactions in rare earth sesquioxides: pressure-, temperature-, and magnetic field-dependent Raman scattering studies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Experimental Measurements of Pressure, Temperature, and Density Using High-Resolution N(2) Coherent Anti-Stokes Raman Scattering
… This CARS technique is able to capture the low-pressure and low-temperature conditions of the M = 3.4 flow entering the Mach disk, as well as the conditions immediately downstream of this normal shock. Further downstream, both the CARS and CFD temperature distributions corroborate the existence …
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Vapor-liquid equilibria from measurements of pressure temperature and over-all composition the system water-2butoxy ethanol
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1958.
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Metamorphic petrology, pressure-temperature paths, and tectonic evolution of the Mount Cube Quadrangle, New Hampshire and Vermont
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.
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Carbon in Silicate Melt - Experimental Constraints and Applications for the Subduction Zone and Magma Ocean Carbon Cycles
We conducted high pressure and temperature experiments to determine the pressure, temperature, H2O content, and oxygen fugacity dependence of CO2 solubility on natural hydrous rhyolitic melts. These studies are applicable to subduction zone settings of the Earth throughout its history. Carbon …
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