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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 215 for “"Dielectrics"”.
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NaNbO₃ - BaTiO₃ - BaSnO₃ ceramic dielectrics
<p>"A. The Problem.</p> <p>The purpose of this investigation was to form by ceramic processes a number of compositions in the ternary system NaNbO<sub>3</sub> - BaSnO<sub>3</sub> - BaTiO<sub>3</sub>, to determine certain dielectric properties of these, to study them by means or x-ray diffraction, …
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Low filler volume concentration composite dielectrics
"One avenue for synthesizing a high energy density capacitor while circumventing the manufacturing problems and low breakdown strength associated with dense, sintered ceramics, is to incorporate low volume concentrations of well dispersed high permittivity filler, such as barium titanate, in …
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Anisotropy, Birefringence, and Dispersion in Artificial Dielectrics
Made available in DSpace on 2014-12-12T20:54:43Z (GMT). No. of bitstreams: 1 7804126.pdf: 6423124 bytes, checksum: 1e680364d4ca7155bc61597a574bdf7d (MD5) Previous issue date: 1977
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Waves in Anisotropic and Birefringent Artificial Dielectrics
… has stimulated renewed interest in artificial dielectrics. The particular dielectric studied is comprised of periodically spaced square arrays of thin square metallic obstacles. The major objectives of this study are first, to determine why the lenses previously built with this material failed …
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Keer electro-optic measurements in liquid dielectrics
Kerr electro-optic technique has been used to measure the electric field distribution in high voltage stressed dielectric liquids, where the difference between refractive indices for light polarized parallel and perpendicular to the local electric field is a function of the electric field …
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Resistive Switching in Porous Low-k Dielectrics
… devices. While increasing porosity of porous dielectrics lowers the dielectric constant (k), it also creates many reliability and implementation issues. One of the problems is the little understood metal ion diffusion and drift in porous media. Here, we present a rigorous simulation method of …
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Adiabatic thermal changes in dielectrics at low temperatures
… the investigation of this phenomenon in other dielectrics at liquid helium temperatures, a temperature region in which no previous measurements of this type have been made.
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Alternative gate dielectrics and application in nanocrystal memory
Nanocrystal memory has attracted much attention because it has better scalability than the conventional floating gate Flash memory. In this work, the performance of germanium (Ge) nanocrystal memory structures, employing high dielectric constant (high-k) materials to replace the tunnel oxide and …
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Ceramic dielectrics for high energy density capacity application
… electrical properties of titanium oxide (TiO₂) dielectrics for high energy density capacitor applications. The effects of aliovalent dopants on the dielectric properties of TiO₂ ceramics were investigated, aiming to further improve the desired dielectric properties especially at elevated …
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Non-perfluorocompound chemistries for plasma etching of dielectrics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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High Temperature Polymer Dielectrics For Electric Vehicle Capacitor Applications
… energy density, high temperature polymer-based dielectrics and capacitors to replace current DC bus capacitors.'
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Scattering Scanning Near-Field Optical Microscopy on Anisotropic Dielectrics
Near-field optical microscopy allows the nondestructive examination of surfaces with a spatial resolution far below the diffraction limit of Abbe. In fact, the resolution of this kind of microscope is not at all dependent on the wavelength, but is typically in the range of 10 to 100 nanometers. On …
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Investigations into leakage current variation in titanium dioxide dielectrics
… fabricated but were too conductive to use as dielectrics. A computer simulation was written that modeled the motion of defect ions and simulated the degradation process. Process parameters (mobility, defect structure, etc) were adjusted and the simulation output showed a period of slow current …
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Trapping and discharge of megavolt electrons in solid dielectrics
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1963
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1/f noise in MOSFETs with ultrathin gate dielectrics
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1992
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Characterization of ultrathin gate dielectrics and multilayer charge injection barriers
Since the invention of the first integrated circuit, the semiconductor industry has distinguished itself by a phenomenally rapid pace of improvements in device performance. This trend of ever smaller and faster devices is a result of the ability to exponentially reduce feature sizes of integrated …
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Development of high energy density dielectrics for pulse power applications
<p>"Pulsed power applications require large dielectrics (> 10" diameter and ~0.125 thick) with high breakdown strength (BDS). The presence of porosity and increasing grain size lowers the BDS. Testing conditions such as sample thickness, electrode area, electrode design, and form of applied voltage …
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