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 629 for “"Transition Temperature"”.
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Proximity Effect in Superconductors: Experimental and Theoretical Determination of the Transition Temperature
Made available in DSpace on 2015-05-12T21:41:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6910735.PDF: 5867236 bytes, checksum: 33d7bb15e54412e5c6e5653901024575 (MD5) Previous issue date: 1968
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Proximity effect in superconductors: Experimental and theoretical determination of the transition temperature
… to the measurement and prediction of the transition temperature of superimposed films. The theoretical work consists of two parts: (1) an extension of the diffusion approximation theory due to de Gennes, Guyon and Werthamer; this theory is valid only when the mean free paths in the two …
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The Effects of Electron Radiation on the Glass Transition Temperature of a Polyetherimide
… In particular, the changes in the glass transition temperature (T<sub>g</sub>) with absorbed radiation dose were studied. The polymer was exposed to mono-energetic beams of 100-keV electrons and 1.0-MeV electrons for doses up to 100 megagray (MGy). Dosimetry for the exposures was based on …
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Microstructure-properties relationships in yttrium- and bismuth-based high critical transition temperature superconductors
Restriction data tranferred 2014-07-01T11:25:04-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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Sinter-patterning of oxide dielectric and high critical transition temperature films by pulsed neodymium:YAG laser
Using metallo-organic precursors formulated based on metal carboxylates, various oxide dielectric films (ZrO$\sb2$, Y$\sb2$O$\sb3$ yttria stabilized zirconium (YSZ)), perovskite based oxide films (BaTiO$\sb3$, SrTiO$\sb3$, CaTiO$\sb3$, YBa$\sb2$Cu$\sb3$O$\sb{\rm 7-x}$), and …
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Effect of heat treatment on dyeability, glass transition temperature, and tensile properties of polyacrylonitrile fibers (orlon 42)
… they were boiled in water for 15 min. The glass transition temperatures (Tg) were obtained by differential scanning calorimetry. The ratio of the intensities of the CN/CH stretching bands were found by infrared spectroscopy, using the KBr method
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Roles of mesh size, segmental dynamic, glass transition temperature and molecular structure on penetrant diffusion in dense vitrimers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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The effect of manganese doping on the superconducting transition temperature and the upper critical field of tin-molybdenum-sulfide
We have measured the superconducting transition temperature, Tc' and the upper critical field, Hc2 (T), of manganese-doped SnMo6S8 (MnxSn1_xMo6S8)' These samples had reproducible superconducting properties. They were characterized by x-ray powder diffractometry, optical microscopy. electron …
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Temperature and rate dependent finite strain behavior of poly(ethylene terephthalate) and poly(ethylene terephthalate)-glycol above the glass transition temperature
… and the stress-strain behavior above the glass transition depend strongly on temperature, strain rate, strain magnitude, and strain state. A robust constitutive model to accurately account for this stress-strain behavior in the processing regime is highly desirable in order to predict and …
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A constitutive theory for the mechanical response of amorphous metals at high temperatures spanning the glass transition temperature : application to microscale thermoplastic forming of Zr₄₁.₂Ti₁₃.₈Cu₁₂.₅Ni₁₀Be₂₂.₅
… response of amorphous metals in the temperature range relevant to thermoplastic-forming. What is needed is a unified constitutive framework that is capable of capturing the transition from a elastic-visco-plastic solid-like response below the glass transition to a Newtonian fluid-like …
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Crosslinked conventional size and nanoparticle size acrylic latexes and their blends: Investigation of the effects of crosslinking, particle size and distribution, glass transition temperature and blending on film formation, properties and morphology
… size ~ 120-130 nm) and distribution, glass transition temperature (Tg), and blending on latex film formation process, properties and latex morphology. Films cast from these latexes were characterized using specific end use tests and fundamental properties using advanced instruments such as a …
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23Na/51 V-NMR study of (Alpha)´- NaV2O5
… sodium vanadate is found to have a double phase transition. The two transitions are close together and take place around 34 K. Above the transition temperature there is one V site in the mixed oxidation state 4.5+ and there is one Na site. A consistency for a number of un-doped and very slightly …
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Superconductivity of thorium hydrides and thorium deuterides
… found that Th4 H15 is a superconductor with a transition temperature near 8K, Measurements of the diamagnetic susceptibility of 24 thorium hydride and thorium deuteride samples of various compositions have been made to determine the effect of composition and of hydrogen isotope on the …
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Modifying the Composition of a High Temperature Superconductor
… and modify it in an attempt to raise its transition temperature. A superconductor is any material that excludes magnetic flux from its interior when at a temperature below its transition temperature. A “high temperature” superconductor refers to material that shows superconductivity at or …
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A theoretical study of surface kinetic processes in the Mbe growth of compound semiconductors
… of surface roughening kinetics in GaAs (100), a transition temperature at which time averaged RHEED intensity is maximum was observed. The RHEED intensity increases with temperature till the transition temperature and decreases beyond the transition temperature. The doping studies were performed …
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Normal state properties of high-angle grain boundaries in Y$_{1-x}$Ca$_{x}$Ba$_{2}$Cu$_{3}$O$_{7-}$$_\delta$
… (calcium-doped YBCO). YBCO is a high-temperature superconducting material with a superconducting transition temperature up to 93 K. Grain boundaries are interfaces between two crystals or grains, and severely reduce the attainable currents in practical, polycrystalline material. A …
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Synthesis and characterization of thermo-responsive polyethers
… onto hyaluronic acid to obtain gelation at temperatures above the phase transition temperature of poly (GME-EH). PGME is a water-soluble polymer at low temperatures, but phase separates at 57.3oC. The transition temperature of PGME is too high to be utilized in medical applications. Thus a …
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Electrical properties of some low-dimensional compounds
… compounds exhibiting conducting-insulating transitions have been studied. The first of these is the pseudo-one-dimensional compound [C(NH2)3]2Pt(CN)4Bro.23 HLO (GCP) , a material similar to KCP, with the potassium replaced with a large, asymmetric organic cation. Diffuse x-ray scattering …
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