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  • 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:
    structure and dielectric properties resulting in extremely low loss dielectric materials with dielectric

  • Defect Mechanisms in Bismuth-based Perovskites

    Creator:
    Kumar, Nitish
    Abstract:
    The aim of this research is to develop a fundamental understanding of the dominant defect species and the relevant defect equilibrium conditions for bismuth-containing perovskites to help guide the development of these materials for emerging applications. This is of paramount importance for many demanding applications, because ultimately the defect equilibria...
    Resource Type:
    Dissertation
    Full Text:
    superior dielectric properties for high temperature and high energy density applications as compared to

  • Influence of surface conditioning on the ionization, breakdown, and tracking over solid dielectrics

    Creator:
    Wiedow, Carl Paul
    Resource Type:
    Dissertation
    Full Text:
    process of the solution. -Ln. sum:xy, the increased life of the dielectric is due o trie suppression

  • Vacuum evaporated dielectrics in MOS structures

    Creator:
    Delzer, Dennis Richard
    Abstract:
    Vacuum evaporated dielectrics for use in MOS structures were studied in this research project. Dielectric films were deposited on substrates by electron bombardment evaporation of sapphire and quartz source materials. These deposited films were studied using infrared spectroscopy, index of refraction, density, and dielectric constant measurements. Etching tests were also...
    Resource Type:
    Dissertation
    Full Text:
    dielectrics for use in MOS struc- tures were studied in this research project. Dielectric films were

  • Space-charge-limited currents in silicon using gold contacts

    Creator:
    Ede, Alan Winthrop
    Abstract:
    The theoretical characteristics of space-charge-limited currents in solids are reviewed, and a survey of suitable dielectric materials and experimental space-charge-limited devices is presented. The properties of the gold-silicon contact as used in space-charge-limited devices were experimentally investigated. It was found that the observed characteristics could be explained on the basis...
    Resource Type:
    Dissertation
    Full Text:
    dielectric materials and experimental space - charge- limited devices is presented. The properties of the

  • Dielectric relaxation in crystalline V₂O₅

    Creator:
    Mar, Kenneth Mow
    Resource Type:
    Dissertation
    Full Text:
    Dielectric relaxation in crystalline V₂O₅ AN ABSTRACT

  • 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:
    . The dielectric permittivity exhibited a transformation from a sharp phase transition to the relaxor

  • 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:
    Development of Complex Perovskite Dielectric Ceramics for

  • Investigation of metal-insulator-metal (MIM) and nanolaminate barrier MIIM tunnel devices fabricated via atomic layer deposition

    Creator:
    Alimardani, Nasir
    Abstract:
    Metal-insulator-metal (MIM) tunnel devices have been proposed for high speed applications such as hot electron transistors, IR detectors, optical rectennas for IR energy harvesting, and backplanes for LCDs. The majority of these applications require highly asymmetric and non-linear current versus voltage (I-V) behavior at low applied voltages and ultra-high frequencies....
    Resource Type:
    Dissertation
    Full Text:
    mechanisms of electron transport in each dielectric are investigated. Next, as an alternative approach to

  • Design, fabrication, and testing of inhomogeneous dielectrics

    Creator:
    Lim, Sungkyoo
    Abstract:
    In this thesis the concept of inhomogeneous dielectrics is demonstrated for various optical coating applications. Compositionally-varying silicon oxynitride (SiON) dielectric layers, with the refractive index varying as a function of position, are grown by computer-controlled plasma-enhanced chemical vapor deposition (PECVD) using silane, nitrogen, and nitrous oxide reactant gases. Compositionally graded...
    Resource Type:
    Dissertation
    Full Text:
    oxynitride (SiON) dielectric layers, with the refractive index varying as a function of position, are grown