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Filtering by: Creator Watson, G. W. Remove constraint Creator: Watson, G. W. Committee Member Warnes, William Remove constraint Committee Member: Warnes, William

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  • Structure and piezoelectric properties of lead-free bismuth-based perovskite solid solutions

    Creator:
    Huang, Chien-Chih
    Abstract:
    A new group of lead free piezoelectric perovskite solid solutions, (1-x)Bi(B'B")O₃-xABO₃, were obtained via solid-state processing techniques. The solubility of unstable perovskite Bi(B'B")O₃ compounds into stable perovskite compounds was found to be related to the tolerance factor of the ABO₃ perovskite endmembers. The morphotropic phase boundary (MBP) in perovskite solid...
    Resource Type:
    Dissertation
    Full Text:
    would also like to thank my committee members Dr. William Warnes, Dr. Jamie Kruzic, Dr. Philip Watson

  • Negative thermal expansion in AOMO₄ compounds

    Creator:
    Amos, Tammy G.
    Resource Type:
    Dissertation
    Full Text:
    THE THESIS OF Tammy G. Amos for the degree of Doctor of Philosophy in Chemistry presented on October

  • Studies toward the total synthesis of azaspiracid-1

    Creator:
    Kuiper, Damien L.
    Abstract:
    Azaspiracid has generated an enormous amount of scientific interest in the fourteen years since its initial discovery. The structure contains a 6,5,6 bis-spiroketal, a [3.3.1] bicyclic ketal and a 6,5-spiroaminal linkage as key moieties. With 9 rings, 20 stereocenters and three alkenes, the azaspiracid immediately attracted the interest of the...
    Resource Type:
    Dissertation
    Full Text:
    . Title: Studies Toward the Total Synthesis of Azaspiracid-1. Abstract approved: Rich G

  • Tuning Functional Properties of Pyrochlore and Related Oxides via Cation and Anion Substitutions

    Creator:
    Giampaoli, Gabriella C. S.
    Abstract:
    Inorganic structures play an important role in materials due to their versatility and diversity. A complete understanding of the structure of a material is vital to enhance the creation of new materials that fill voids in research. The rational design of these compounds is driven by the exploitation of structure-property...
    Resource Type:
    Dissertation
    Full Text:
    contributed to the preparation and review of the publication on which this chapter was based; Giampaoli, G

  • Magmatic processes beneath mid-ocean ridges : insights from mineral and glass chemistry in plagioclase ultraphyric basalts

    Creator:
    Lange, Amy E.
    Abstract:
    Prior to eruption at mid-ocean ridges, melts must travel through >6 km of crust from their origin in the mantle. The final composition of the melts is dependent on both the melting conditions and magmatic processes within the crust. While mid-ocean ridge basalt (MORB) glasses are commonly used to infer...
    Resource Type:
    Dissertation
    Full Text:
    and aphyric glass chemistry…………………. 52 3.6. Plot of MgO (wt%) versus density (g cm-3) of the host

  • Cation Substitution Effects in Complex Transition Metal Oxides

    Creator:
    Duell, Brett A.
    Abstract:
    Understanding structural evolution in solids as composition changes is essential to materials properties prediction. Such structure-properties relationships are the theme of solid state chemistry. Materials scientists and chemists have utilized an abundance of simple crystal structures to enhance understanding of chemical and structural origins of properties in materials for decades....
    Resource Type:
    Dissertation

  • The dynamic shear moduli of blubber for selected large whale species

    Creator:
    Summers, Michael P.
    Abstract:
    Whale blubber is the insular tissue layer located between the dermis and the superficial fascia layer which sheathes the whale's musculature. It is made up of a lipid matrix ramified with strong, structural collagen and elastic fiber bundles, but little is known of its mechanical properties. Knowing these properties adds...
    Resource Type:
    Masters Thesis
    Full Text:
    measurements of the complex dynamic shear modulus (G*=G’+iG”), a viscoelastic mechanical property, of

  • Semi-digital PLL architecture for ultra low bandwidth applications

    Creator:
    George, Edmond
    Abstract:
    Phase Locked Loops(PLLs) are an integral part of almost every electronic system. Systems involving low frequency clocks often require PLLs with low bandwidth. The area occupied by the large loop filter capacitor and resistor in a low bandwidth PLL design makes the realization of traditional charge-pump PLL architecture impractical on...
    Resource Type:
    Masters Thesis
    Full Text:
    , at low current values the transistors begin to operate in subthreshold region with normal W/L ratios

  • Determination of magnetoelastic parameters in magnetic thin films from FMR spectra

    Creator:
    Masood, Khalid I.
    Abstract:
    The ferromagnetic resonance (FMR) phenomenon serves as a sensitive probe of the effective internal fields in a magnetic material. FMR spectroscopy has consequently become a well-established technique, extensively employed in assessing material properties such as magnetic anisotropy, Landé g-factor, damping parameter, and the magnetoelastic constants of magnetic materials. Determining these...
    Resource Type:
    Dissertation
    Full Text:
    magnetic anisotropy, Landé g-factor, damping parameter, and the magnetoelastic constants of magnetic

  • Processing effects on the ductility of chromium-vanadium alloys

    Creator:
    Murdock, Hailey M.
    Abstract:
    The next generation of high temperature structural alloys must exhibit exceptional resistance to fracture, creep, oxidation, and fatigue at high temperatures. Chromium is being considered due to its high melting point (>1800°C), relatively low density (~7.2 g/cc), high temperature strength, and oxidation resistance. Limiting the use of chromium is its...
    Resource Type:
    Masters Thesis
    Full Text:
    due to its high melting point (>1800°C), relatively low density (~7.2 g/cc), high temperature