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Sol-gel processing of varistor powders

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Abstract

A new sol-gel method for the preparation of ZnO varistor powders, using inexpensive source materials such as acetates and nitrates, is described. It yields powders with a more homogeneous distribution of dopants compared to the commercially used mixed oxide technique. Varistor ceramics made from sol-gel powders can be sintered at lower temperatures and show improved electrical behavior. This is a consequence of formation of more varistor-active grain boundaries within the ceramics.

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Authors and Affiliations

  1. Universität Erlangen/Nürnberg, Institut für Werkstoffwissenschaften III, Martensstr. 5, Erlangen, D-8520, Germany

    Gert Hohenberger & Gerhard Tomandl

Authors
  1. Gert Hohenberger
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  2. Gerhard Tomandl
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Hohenberger, G., Tomandl, G. Sol-gel processing of varistor powders. Journal of Materials Research 7, 546–548 (1992). https://doi.org/10.1557/JMR.1992.0546

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  • DOI: https://doi.org/10.1557/JMR.1992.0546

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