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Filtering by: Creator Maglione, M. Remove constraint Creator: Maglione, M. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.) Peer Reviewed No Remove constraint Peer Reviewed: No

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  • The Local Structure of Functional Electroceramics

    Creator:
    Culbertson, Charles M.
    Abstract:
    This work investigates the relationship between the local structure and physical properties of a set of classical (MgTiO3, CaTiO3, SrTiO3, and BaTiO3) and complex ((1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3[BZT-BCT], Na0.5Bi0.5TiO3 [NBT]) perovskite electroceramics. The materials in this work were synthesized via standard solid state ceramic synthesis, the structure was investigated through a number of...
    Resource Type:
    Dissertation
    Full Text:
    Absorption Fine Structure (EXAFS) from M. Blank, reproduced with permission under CC BY-SA 3.0

  • Development of complex perovskite dielectric ceramics for high temperature capacitor applications

    Creator:
    Raengthon, Natthaphon
    Abstract:
    Dielectric ceramics designed for capacitor applications for use in extreme environments, such as high temperatures, high voltages, or high-pressure environments, are in great demand. Existing capacitor technology fails to perform within these extreme conditions or such environments. The development of new dielectric ceramic materials for high temperature capacitor applications is...
    Resource Type:
    Dissertation
    Full Text:
    acknowledge, Dr. Brady J. Gibbons, Dr. P. Alex Greaney, Dr. John F. Conley, Dr. David Roundy, Dr. Ian M

  • 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:
    systems based on Bi(M)O3- PbTiO3 (M=Ti4+, Sc3+, Zn2+, Nb5+…) which show high transition temperature and

  • Relaxor characteristic and phase evolution of complex perovskite barium titanate bismuth zinc titanate ceramics

    Creator:
    Triamnak, Narit
    Abstract:
    Relaxor characteristic of the solid solution (1-x)BaTiO₃-(x)Bi(Zn₁/₂Ti₁/₂)O₃ (BTBZT) was investigated in this research. X-ray diffraction technique and Raman spectroscopy revealed the crystal structure of BT-BZT at various compositions. For compositions with x ≤ 0.08, the solid solutions exhibited clear tetragonal symmetry and transitioned to pseudo-cubic symmetry as the content of...
    Resource Type:
    Dissertation
    Full Text:
    . CONTRIBUTION OF AUTHORS Dr. Jan Pokorny and Dr. Ian M. Reaney assisted in the Raman pectroscopy measurement

  • Translating the Better Bones and Balance Intervention Program into the community setting: effects of participation on skeletal health, fall risk indicators, and physical activity among older women

    Creator:
    McNamara, Adrienne J.
    Abstract:
    Better Bones and Balance (BBB) is a community-based exercise program to improve bone health and reduce fall risk among older adults. Prior research has shown that when the program is delivered by researchers under controlled conditions, participants improved strength and balance, and maintained bone mineral density (BMD) at the hip....
    Resource Type:
    Dissertation
    Full Text:
    10-m walk time and one leg stance time, indicative of greater mobility and balance, findings

  • Functional materials for advanced energy and electronic devices

    Creator:
    Flynn, Brendan T.
    Abstract:
    Advances in energy technologies and electronics have typically occurred through either heightened performance or cost reduction. This dissertation explores both routes through a series of fundamental material studies that may contribute to the enabling of next generation devices. Solution based syntheses and deposition of chemical products offer a low cost...
    Resource Type:
    Dissertation
    Full Text:
    . James, and M. Woodhouse, “A wafer-based monocrystalline silicon photovoltaics road map: Utilizing

  • Structure-Property Relationships of Disordered Electronic Materials : From Crystalline to Amorphous

    Creator:
    Surta, Todd Wesley, Jr.
    Abstract:
    Two perovskite materials (Bi0.5(A)0.5)(Sc0.5Nb0.5)O3, where A = K+ and Na+ were synthesized phase pure for the first time. Their structures were determined by indexing synchrotron X-ray diffraction data and subsequent combined Rietveld refinement on neutron and synchrotron X-ray diffraction data revealing significant disorder on the A-sites of these materials. A...
    Resource Type:
    Dissertation
    Full Text:
    synchrotron XRD and NPD data for a) P4/mbm, b) Cmcm, c) Pbnm, d) Pbcm, and e) R3c, and f) P21/m

  • Morphodynamics of 3D Migrating Cancer Cells

    Creator:
    Eddy, Christopher Z.
    Abstract:
    At the intersection of basic science research and clinical relevance, cancer metastasis and cell invasion is a multifaceted problem that has been investigated for the past several decades. Importantly, cancer cell plasticity, the ability of a single cell to change its phenotype without genetic mutations in response to environmental cues,...
    Resource Type:
    Dissertation

  • Understanding of Ferroelectric to Relaxor Phenomenon in Bismuth-based Perovskite

    Creator:
    Gupta, Sanu K.
    Abstract:
    It has been well established that ferroelectric to relaxor crossover in piezoelectric ceramics exhibit promising electromechanical and dielectric properties over a wide temperature range, applying sensors and actuators transducers and such. A plethora of research has reported giant strain in various lead-free piezoelectric ceramics and attributed the reasoning to the...
    Resource Type:
    Dissertation
    Full Text:
    solution. Applied physics letters, 2008. 93(11): p. 112902. 11. Izumi, M., et al., Large electric-field