Neusel, ClaudiaClaudiaNeuselJelitto, HansHansJelittoSchmidt, DieterDieterSchmidtJanßen, RolfRolfJanßenFelten, FrankFrankFeltenSchneider, Gerold A.Gerold A.Schneider2013-10-302013-10-302011Journal of the European Ceramic Society, Volume 32, Issue 5, May 2012, Pages 1053-1057http://tubdok.tub.tuhh.de/handle/11420/1144The 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.enhttp://doku.b.tu-harburg.de/doku/lic_mit_pod.phpAluminiumoxid Einkristall, Isolator, Durchschlagskanal, bruchmechanische Analysedielectric breakdown, optical microscopy, single crystal alumina, insulator, breakdown channel,IngenieurwissenschaftenEngineering and allied operationsWorking Paper2013-10-30urn:nbn:de:gbv:830-tubdok-1240710.15480/882.1142Elektrischer DurchschlagOptische AnalyseDielectric properties of solids and liquidsInsulatorsCrystal structure and defects11420/114410.15480/882.1142930768992Working Paper