2026-09-23T17:05:26Z
https://www.ideals.illinois.edu/oai-pmh
oai:www.ideals.illinois.edu:2142/82784
2023-07-11
col_2142_5131
col_2142_13836
com_2142_5130
com_2142_13835
com_2142_234
Payne, David A.
Brennecka, Geoffrey Lee
2015-09-25T20:53:00Z
2015-09-25T20:53:00Z
10000-01-01
2006
2006
Dense and homogeneous specimens enabled the first detailed investigation into the electrical properties of TiO2-modified H-Ta2O 5 ceramics. Specimens containing 8% TiO2 exhibited dielectric constant (K) values of ∼280 at 20°C with tan delta values ∼0.01, but undoped specimens had tan delta values of ∼0.10 and DC resistivity values of <1011O·cm. Hyper-Raman spectroscopy revealed that the ionic polarizability (and thus the intrinsic K) of H-Ta 2O5 ceramics was independent of TiO2 content. Cryogenic electrical measurements suggested that the structural K ≈ 70-80, and showed that enhanced K values resulted from localized carriers related to compensation for deviations from the fully-edge-shared 89Ta2O 5-11TiO2 composition.
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Previous issue date: 2006
Embargo set by: Seth Robbins for item 84065
Lift date: Forever
Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
U of I Only
268 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
http://hdl.handle.net/2142/82784
(MiAaPQ)AAI3242800
eng
Engineering, Materials Science
Origins of Enhanced Dielectric Properties in Titania-Modified Tantalum Pentoxide Ceramics
text
Materials Science and Engineering
Materials Science and Engineering
University of Illinois at Urbana-Champaign
Dissertation
Ph.D.