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Filtering by: Creator Maglione, M. Remove constraint Creator: Maglione, M. Degree Field Materials Science Remove constraint Degree Field: Materials Science

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  • 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

  • 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