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.




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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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