Influence of cooling rate on electrical properties of zinc oxide-based varistors

Shr Nan Bai, Tseung-Yuen Tseng

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The influence of the cooling rate on the microstructure, the nonlinear parameter a, the breakdown voltage K1mA/cm 2, the dielectric properties and the leakage current of the ZnO varistors was investigated. The morphology of the microstructure has different appearances under the effect of the varying cooling rates. The nonlinear parameter and the breakdown voltage reached a maximum as the cooling rate was adequately chosen. In the frequency range of 600- 1 MHz, the dielectric properties of the samples dealt with at different cooling rates showed a similar tendency. However, the leakage currents of the samples showed different behavior under a constant voltage stress. As a result, the physical and electrical properties of the ZnO varistors can be said to be affected by the cooling rate.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalJapanese Journal of Applied Physics
Volume31
Issue number1 R
DOIs
StatePublished - 1 Jan 1992

Keywords

  • 10.1143/JJAP.31.81
  • 1992
  • 1R
  • 31
  • 81
  • 86
  • Cooling rate
  • Electrical property
  • January 1992
  • ZnO varistor

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