Development of Temperature-Stable Relaxor Dielectrics for High Energy Density Capacitor Applications Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5d86p361f

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  • High performance dielectric materials are needed for high power SiC- or GaN-based electronics which combine the best features of high energy density, low dielectric loss and high reliability and for advanced high-speed and high-voltage energy storage where temperature stability plays an important role in material properties. An ideal capacitor for these systems features temperature-stable permittivity characteristics, a maximum permittivity near or below 0 °C, and sufficiently high permittivity to have practical application. This work involves the synthesis, processing, characterization, testing, and evaluating of the perovskite compositions BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃BiScO₃-NaNbO₃, BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃-Pb(Mg₁/₃Nb₂/₃)O₃, and BaTiO₃Bi(Zn₁/₂Ti₁/₂)O₃-Pb(Ni₁/₃Nb₂/₃)O₃, all of which were investigated as possible linear dielectric capacitor materials. These materials have excellent dielectric properties due to a relaxor dielectric mechanism which is derived from B-site cation disorder. The characteristic diffuse phase transition observed in relaxor materials allows for a large temperature range of operation. These systems have been shown to have facile synthesis routes, creating single-phase solid solutions. The compositions studied have provided a framework for future work which would involve compositional modifications aimed at increasing the relative permittivity which would allow further device miniaturization as well characterization of the dielectric properties at high electric fields (E > 100 kV/cm).
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  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2016-10-13T17:03:15Z (GMT) No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) McCueConnorS2016.pdf: 2542982 bytes, checksum: 9170005308755b51e568306965ee7cd6 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2016-10-13T22:16:53Z (GMT) No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) McCueConnorS2016.pdf: 2542982 bytes, checksum: 9170005308755b51e568306965ee7cd6 (MD5)
  • description.provenance : Submitted by Connor McCue (mccuec@oregonstate.edu) on 2016-10-12T23:41:22Z No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) McCueConnorS2016.pdf: 2542982 bytes, checksum: 9170005308755b51e568306965ee7cd6 (MD5)
  • description.provenance : Made available in DSpace on 2016-10-13T22:16:53Z (GMT). No. of bitstreams: 2 license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5) McCueConnorS2016.pdf: 2542982 bytes, checksum: 9170005308755b51e568306965ee7cd6 (MD5) Previous issue date: 2016-09-16
  • description.provenance : Submitted by Connor McCue (mccuec@oregonstate.edu) on 2016-10-03T19:33:48Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) McCueConnorS2016.pdf: 2544536 bytes, checksum: f9bd9e1fdc24d63ba9ce15ddbb6eaa42 (MD5)
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Hi Connor, I checked over your submission to ScholarsArchive and noticed a couple changes required - 1) The major name shows Material Science and it's actually Materials Science. Make this change to the Abstract and Approval pages 2) Pretext pages are not numbered, so remove the page numbers starting with the Table of Contents in the pretext pages only. 3) Remove the blank page between the pretext pages and page 1. Also page 89 is blank. If nothing is missing remove this page also. Everything else looks good. Once revised, log back into ScholarsArchive and go to the upload page. Replace the attached file with the revised PDF and resubmit. Once you resubmit and I receive the signed ETD submission approval form, then I can certify your degree. Thanks, Julie on 2016-10-12T17:18:50Z (GMT)

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