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Conduction mechanism of single-crystal aluminaThe fully guarded three-terminal technique was used to perform conductivity measurements on single-crystal alumina at temperatures of 400-1300 C. The conductivity was also determined as a function of time at various temperatures and applied fields. Further, the fractions of the current carried by Al and O ions (ionic transference numbers) were determined from long-term transference experiments in the temperature range 1100-1300 C. A mathematical model of the conduction mechanism is proposed, and model predictions are compared with experimental results.
Document ID
19920042816
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Will, Fritz G.
(NASA Headquarters Washington, DC United States)
Delorenzi, Horst G.
(NASA Headquarters Washington, DC United States)
Janora, Kevin H.
(General Electric Co. Schenectady, NY, United States)
Date Acquired
August 15, 2013
Publication Date
February 1, 1992
Publication Information
Publication: American Ceramic Society, Journal
Volume: 75
ISSN: 0002-7820
Subject Category
Nonmetallic Materials
Accession Number
92A25440
Funding Number(s)
CONTRACT_GRANT: DE-AC03-86SF-16006
Distribution Limits
Public
Copyright
Other

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