2010
DOI: 10.1016/j.jeurceramsoc.2009.09.025
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Alumina based ceramics for high-voltage insulation

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Cited by 98 publications
(38 citation statements)
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“…Insulators electrically fail when a dielectric breakdown event happens, which leads to a formation of an electrically conductive channel through the insulator. It is assumed that the initiation of breakdown happens, due to a sudden destabilization of trapped charges [1][2][3], which causes a current flow through the material. The breakdown strength, E b , defined as breakdown voltage, V b , per sample thickness, t, is reported to be dependent on the microstructure [2][3][4], sample thickness [5][6][7][8][9] and loading condition [8,[10][11][12].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Insulators electrically fail when a dielectric breakdown event happens, which leads to a formation of an electrically conductive channel through the insulator. It is assumed that the initiation of breakdown happens, due to a sudden destabilization of trapped charges [1][2][3], which causes a current flow through the material. The breakdown strength, E b , defined as breakdown voltage, V b , per sample thickness, t, is reported to be dependent on the microstructure [2][3][4], sample thickness [5][6][7][8][9] and loading condition [8,[10][11][12].…”
Section: Introductionmentioning
confidence: 99%
“…It is assumed that the initiation of breakdown happens, due to a sudden destabilization of trapped charges [1][2][3], which causes a current flow through the material. The breakdown strength, E b , defined as breakdown voltage, V b , per sample thickness, t, is reported to be dependent on the microstructure [2][3][4], sample thickness [5][6][7][8][9] and loading condition [8,[10][11][12]. The influence of the porosity [2,[13][14][15], grain size [2-4, 13, 15-17], purity and secondary phase [2-4, 6, 7] on the breakdown strength have been investigated.…”
Section: Introductionmentioning
confidence: 99%
“…For example, ceramic materials which are widely used as insulation materials in industrial applications still exhibit limitations although their dielectric breakdown strength is optimized using empirical methods. The initiation of dielectric breakdown is proposed to be an electronic dominated process 4 and can be described as a sudden destabilisation of charges trapped in the material 5,6 . Defects of the microstructure such as pores, grain boundaries, impurities, crystallographic defects and secondary phases are considered as trapping sites.…”
Section: Introductionmentioning
confidence: 99%
“…The dielectric properties of undoped corundum, α-alumina, of different kinds (single crystal or polycrystalline obtained by solid state sintering) have been the subject of numerous studies concerning, in particular, the breakdown strength and the charging behavior (Haddour et al, 2009;Liebault et al, 2001;Si Ahmed et al, 2005;Suharyanto et al, 2006;Thome et al, 2004;Touzin et al, 2010;Zarbout et al, 2008Zarbout et al, , 2010. The common feature pointed out by most of these investigations is the conspicuous role played by the microstructure and the impurities.…”
Section: Introductionmentioning
confidence: 99%