Dynamic Light Scattering in Mixed Alkali Metaphosphate Glass Forming Liquids

dc.contributor.advisorSidebottom, David L.en_US
dc.contributor.authorChangstrom, Jessicaen_US
dc.contributor.cuauthorChangstrom, Jessicaen_US
dc.date.accessioned2009-08-31T21:45:27Z
dc.date.available2009-08-31T21:45:27Z
dc.date.issued2008-06-20
dc.degree.committeeCipolla, Sam J.en_US
dc.degree.committeeSeger, Janet E.en_US
dc.degree.disciplinePhysics (graduate program)en_US
dc.degree.grantorGraduate Schoolen_US
dc.degree.levelMS (Master of Science)en_US
dc.degree.nameM.S. in Physicsen_US
dc.description.abstractThe Mixed alkali effect (MAE) is an often studied phenomenon, 0ccurring in material containing more than one type of alkali, in which a marked deviation from linear compositional dependence is observed. Previous studies have observed a MAE in properties, like the internal friction and dc conductivity, of mixed alkali materials in the glassy state. A MAE has also been observed in the glass transition temperature (Tg) of mixed alkali materials, suggesting that the mechanism behind the effect must persist into the liquid state. In this work, the mixed alkali effect was studied by performing photon correlation spectroscopy on eleven different compositions of LixNa1-xPO3 liquid. This yielded values of Tg, fragility index and the non-exponentiality of the relaxation. All of these properties exhibited the non-linear compositional variation characteristic of the MAE, with a minimum occurring at the most mixed composition. The variation in Tg is in agreement with literature values. The variation in fragility index is thought to be an artifact of the dip in Tg. The variation in non-exponentiality is expected as a decrease in non-exponentiality suggests a greater diversity in relaxation within the liquid.en_US
dc.description.pagesix, 64 leavesen_US
dc.identifier.otherThesis-Changstrom.pdf
dc.identifier.urihttp://hdl.handle.net/10504/85
dc.language.isoen_USen_US
dc.publisherCreighton Universityen_US
dc.publisher.locationOmaha, Nebraskaen_US
dc.subject.lcshLight beating spectroscopyen_US
dc.subject.lcshGlassen_US
dc.subject.lcshRelaxation phenomenaen_US
dc.titleDynamic Light Scattering in Mixed Alkali Metaphosphate Glass Forming Liquidsen_US
dc.typeThesis
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