Chemical preparation and properties of high-field zinc oxide varistors
- 1 February 1986
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 1 (1) , 90-99
- https://doi.org/10.1557/jmr.1986.0090
Abstract
Chemical preparation methods were developed for high-field ZnO varistors which used precipitation techniques to prepare precursor powders. Varistors were made by sintering uniaxially pressed pellets in the range of 675°–740 °C in air. Properties of these varistors included electric fields (E) in the 10–100 kV/cm range at current densities (J) of 5 A/cm2, nonlinearity coefficients (α) greater than 30 for 2.5≤J≤5.O A/cm2, and densities in the range of 65%-99% of theoretical depending both on sintering temperature and composition.Keywords
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