The Role of Interfacial Microstructure in ZnO Varistor Materials

  • E. Olsson
  • R. Österlund
  • G. L. Dunlop
Part of the Materials Science Research book series (MSR, volume 21)


The influence of sintering parameters (e. g. time and cooling rate) on the inter granular microstructure of a ZnO varistor material has been investigated and related to leakage currents. It is considered that the three dimensional network ofBi-rich phases which exists at multiple grain junctions provides an alternative conduction path through the material. This path becomes important at voltages below the break down.


Cool Rate Sinter Temperature Leakage Current Triple Junction Dimensional Network 
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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • E. Olsson
    • 1
  • R. Österlund
    • 2
  • G. L. Dunlop
    • 1
  1. 1.Department of PhysicsChalmers University of TechnologyGöteborgSweden
  2. 2.ASEA SwitchgearLudvikaSweden

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