Conduction mechanisms in ZnO varistors
- 1 August 1980
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 51 (8) , 4240-4244
- https://doi.org/10.1063/1.328238
Abstract
The thermionic emission enhanced by barrier lowering and the Zener tunnelling in ZnO varistors are discussed. Capacitance versus voltage, reverse current versus temperature, and 1/f noise measurements have been performed on commercial varistors. A model is proposed from which follows a diffusion voltage VD which is consistent both with the 1/C2 vs V plot and with the thermal activation energy obtained from the reverse current versus 1/T. The empirical law β=d log V/dlog I= constant, is explained by Zener breakdown. The 1/f current noise is proportional to the square of the current and independent of the conduction mechanism across reversely biased barriers.This publication has 16 references indexed in Scilit:
- Grain-boundary segregation in a commercial ZnO-based varistorJournal of Applied Physics, 1979
- A Scanning Transmission Electron Microscopy Investigation of Grain‐Boundary Segregation in a ZnO‐Bi2O3 VaristorJournal of the American Ceramic Society, 1979
- Conduction mechanism of non-Ohmic zinc oxide ceramicsJournal of Applied Physics, 1978
- Évolution et rôle des constituants chimiques au cours du processus de fabrication des varistances à base d'oxyde de zincRevue de Physique Appliquée, 1978
- ZnO Varistors for Transient ProtectionIEEE Transactions on Parts, Hybrids, and Packaging, 1977
- The physics of zinc oxide varistorsJournal of Applied Physics, 1977
- Non-Ohmic Properties of ZnO-Rare Earth Metal Oxide-Co3O4CeramicsJapanese Journal of Applied Physics, 1977
- Physical properties of the electrical barriers in varistorsJournal of Vacuum Science and Technology, 1976
- Theory of varistor electronic propertiesC R C Critical Reviews in Solid State Sciences, 1975
- The physics of metal oxide varistorsJournal of Applied Physics, 1975