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  4. Dielectric breakdown of alumina single crystals
 
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Dielectric breakdown of alumina single crystals

Citation Link: https://doi.org/10.15480/882.1142
Publikationstyp
Working Paper
Date Issued
2011
Sprache
English
Author(s)
Neusel, Claudia  
Jelitto, Hans  
Schmidt, Dieter  
Janßen, Rolf  
Felten, Frank  
Schneider, Gerold A.  
Institut
Keramische Hochleistungswerkstoffe M-9  
TORE-DOI
10.15480/882.1142
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1144
Citation
Journal of the European Ceramic Society, Volume 32, Issue 5, May 2012, Pages 1053-1057
The bulk breakdown behaviour of alumina single crystals with two different crystal orientations, {11-20}-plane (single crystal A) and {0001}-plane (single crystal C), have been studied. Therefor plan-parallel single crystal samples were electrically loaded until dielectric breakdown was achieved. For each crystal orientation, a characteristic breakdown channel direction through the sample could be defined. In C-oriented crystals the breakdown channel originated parallel to the c-axis. For A-oriented crystals however, the breakdown channel crossed the sample in an oblique direction; the angle between crystal surface and breakdown channel was 60°. Here, the breakdown channel crossed the sample along an A-plane. Although the breakdown channel paths of A and C crystals are different, the observed breakdown strength are identical within the scatter range.
Subjects
dielectric breakdown, optical microscopy, single crystal alumina, insulator, breakdown channel,
DDC Class
620:Engineering and allied operations
Lizenz
http://doku.b.tu-harburg.de/doku/lic_mit_pod.php
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