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Prebreakdown Conduction in ZnO Varistors
Author(s) -
Castro Miriam S.,
Nuñez Guillermo M.,
Resasco Daniel E.,
Aldao Celso M.
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb04144.x
Subject(s) - varistor , grain boundary , materials science , thermal conduction , crystallite , oxide , rectangular potential barrier , metal , electrical conduction , voltage , composite material , condensed matter physics , engineering physics , optoelectronics , metallurgy , electrical engineering , microstructure , physics , engineering
A model which quantitatively accounts for the important features of prebreakdown conduction in ZnO‐based metal oxide varistors in presented. The prebreakdown current dependence with applied voltage and temperature enables us to extract several features for the grain boundary. Estimations have been made for the local electron concentration in polycrystalline ZnO near the grain boundary and for the grain boundary potential barrier height.