Percolative breakdown model for ceramics based on a random grain-boundary network

G. Zhao, R. P. Joshi, V. K. Lakdawala

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05
Pages544-547
Number of pages4
DOIs
StatePublished - 2005
Event2005 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05 - Nashville, TN, United States
Duration: Oct 16 2005Oct 19 2005

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Volume2005
ISSN (Print)0084-9162

Conference

Conference2005 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05
CountryUnited States
CityNashville, TN
Period10/16/0510/19/05

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    Zhao, G., Joshi, R. P., & Lakdawala, V. K. (2005). Percolative breakdown model for ceramics based on a random grain-boundary network. In 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP '05 (pp. 544-547). [1560740] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP; Vol. 2005). https://doi.org/10.1109/CEIDP.2005.1560740