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 13 of 13 for “"Thermomagnetic"”.
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Thermomagnetic properties of red sediments.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
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Optimization of Materials for Magnetic Refrigeration and Thermomagnetic Power Generation
… materials discovery for refrigeration purposes. Thermomagnetic power generation (TMG) is the process by which magnetic flux, which comes from a temperature-driven change of magnetization, is converted into usable energy.</p> <p>The first part of this dissertation investigates the ways in which …
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Methods for the analysis of thermomagnetic phase transitions of magnetocaloric materials
… focuses on the analysis of the relation between thermomagnetic phase transitions and magnetocaloric response of materials. First, various experimental factors that can a ect the measurements of the magnetocaloric e ect and can potentially cause misleading interpretation or artifacts are studied …
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Low-grade Thermal Energy Harvesting and Waste Heat Recovery
… in low-grade thermal energy harvesting using thermomagnetic and thermoelectric effects. This thesis systematically investigates two different mechanisms: thermomagnetic effect and thermoelectric effect to generate electricity from the low-grade heat sources available near ambient temperature …
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Convective Heat Transfer in Quasi-one-dimensional Magnetic Fluid in Horizontal Field and Temperature Gradients
… number and magnetic Grashof number show that the thermomagnetic convections dominate in high magnetic fields. It is shown that the physical nature of the field effect is corresponding to the magnetic body force which is perpendicular to the gravity in our experiments. When the direction of the …
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ΓΕΩΜΑΓΝΗΤΙΚΕΣ ΜΕΛΕΤΕΣ ΣΕ ΛΙΜΝΑΙΑ ΙΖΗΜΑΤΑ
… 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 NATURAL REMANENCE, IS OF …
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Developing Archaeomagnetic Dating for Neolithic Scotland
… and representative heating/cooling thermomagnetic curves as a proxy for understanding paleotemperatures.
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Modification of magnetic properties in granite during hydrothermal alteration (EPS-1 borehole, Upper Rhine Graben)
… > 10 x 10-3 SI). The k(T) measurements revealed thermomagnetic behavior typical for multi-domain magnetite in fresh granite and an irreversible thermomagnetic behavior in altered granite reflecting the oxidation degree of magnetite. Such degree is related to an alteration index (Al-index) …
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EXPLORATION OF NEW MAGNETOCALORIC AND MULTIFUNCTIONAL MAGNETIC MATERIALS
… means of room-temperature X-ray diffraction and thermomagnetic measurements (in magnetic fields (H) up to 5 T, and in the temperature interval 5-400 K ). Direct adiabatic temperature change (ΔTAD) measurements have been carried out for an applied magnetic field change of 1.8 T. The transition …
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Advanced Numerical Modelling of Bulk Superconductor Magnetisation
… the controlling variables and properties of thermomagnetic instabilities are explored (such as the influence of bulk geometry and size, the critical current density distribution (see section 1.1.1), and the thermal properties). Methods for avoiding them, controlling them, or better monitoring …
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Direction and intensity of Earth's magnetic field at the Permo-Triassic boundary
… remanent magnetisation. The reversibility of the thermomagnetic curves and the observation of exsolution lamellae by ore microscopy give clear evidence for a primary high-temperature oxidation of the titanomagnetite. It can thus be inferred that the measured palaeodirectional and intensity …