TY - GEN
T1 - Percolative breakdown model for ceramics based on a random grain-boundary network
AU - Zhao, G.
AU - Joshi, R. P.
AU - Lakdawala, V. K.
PY - 2005
Y1 - 2005
N2 - The mechanism of intrinsic breakdown in ceramics and insulating polymers is not clearly understood. A common feature in these materials is the existance of internal grain boundaries that provide a natural barrier to conduction. Here we propose that external electric fields work to alter the barrier heights at the various grain boundaries (GBs). A dynamic model for current conduction in ceramics is developed. This random Voronoi network of grains can model percolative paths through the sample, the overall current-voltage characteristics, and estimates effects of variations in grain size.
AB - The mechanism of intrinsic breakdown in ceramics and insulating polymers is not clearly understood. A common feature in these materials is the existance of internal grain boundaries that provide a natural barrier to conduction. Here we propose that external electric fields work to alter the barrier heights at the various grain boundaries (GBs). A dynamic model for current conduction in ceramics is developed. This random Voronoi network of grains can model percolative paths through the sample, the overall current-voltage characteristics, and estimates effects of variations in grain size.
UR - http://www.scopus.com/inward/record.url?scp=33845900449&partnerID=8YFLogxK
U2 - 10.1109/CEIDP.2005.1560740
DO - 10.1109/CEIDP.2005.1560740
M3 - Conference contribution
AN - SCOPUS:33845900449
SN - 0780392574
SN - 9780780392571
T3 - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
SP - 544
EP - 547
BT - 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05
T2 - 2005 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05
Y2 - 16 October 2005 through 19 October 2005
ER -