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Chemical preparation and properties of high-field zinc oxide varistors

Published online by Cambridge University Press:  03 March 2011

R. G. Dosch ,
B. A. Tuttle  and
R. A. Brooks
R. G. Dosch
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185
B. A. Tuttle
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185
R. A. Brooks
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185
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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.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 1 , February 1986 , pp. 90 - 99
Copyright
Copyright © Materials Research Society 1986

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References

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